Annex 1 Open Contest ID No. DS 2019/3/AK/ERAF

Regulations

ICE HALL

CONSTRUCTION PLAN DEVELOPMENT

CONSTRUCTION

AUTHOR SUPERVISION

TECHNICAL SPECIFICATIONS / DESIGN ORDER

20191

TABLE OF CONTENTS

1. General information………………………………………………………………………. 32. General requirements for preparation of tender proposals for design and build………….. 43. Terms for construction plan construction works…………………………………………. 54. Applicable normative documents ………………………………………………………… 55. Main conditions for the construction plan development ………………………………….. 66. Requirements for preparatory works of the construction plan development……………… 87. Requirements for construction plan development………………………………………… 88. Measures of environmental protection ………………………………………………….. 99. Environmental accessibility ………………………………………………………………. 1010. Composition of the construction plan and requirements for solutions of the construction plan:

10.1. Architectural solutions (GP, AR, TS, IN) .…………………..……………. 1110.2. Building structures (BK, BKD) ……………………………………………. 1810.3. Fire security …………………………………………………..……………. 1810.4. Water-supply and sewage (ŪKT, ŪK) ……………………………………. 1910.5. External network of heat-supply (SAT) ……………………………………. 2410.6. Heating unit (SM) ………………………………………………………….. 2510.7. Heating, ventilation, conditioning (AVK) …………………………………. 2510.8. Power supply (ELT, EL) …………………………………………………… 3210.9. Weak current systems (VS) ………………………………………………… 3810.10. Electronic communications systems (ESS) ………………………………… 3810.11. Equipment management automation system (VAS) ………………………… 4710.12. Technology part (TN) ……………………………………………………….. 5010.13. Design for work performance (DOP) ……………………………………….. 5010.14. Guidelines for energy performance ……………………………………….... 5010.15. Economic part (BA, T) ……………………………………………………… 5110.16. Main conditions for the building operation …………………………………. 53

11. Special requirements for construction plan development………………………………. 5412. Expert-examination of the construction plan ……………………………………………. 5513. Author supervision …………………………………………………………………….… 5514. Main conditions/ basic requirements for construction works……………………………. 5615. Total construction costs …………………………………………………………………. 5816. Conditions for inspection and acceptance of the construction works……………………. 5917. Tasks and obligations regarding occupational safety during the construction works ….. 6018. Construction meetings …………………………………………………………………. 6019. Adjustment and testing of the built systems …………………………………………… 6020. Fulfilment of the liabilities of warranty period ………………………………………….. 61

21. Enclosures to Technical specifications:

No. 1 Program of territory and premises application for MBP development; No. 2 Hockey arena classification regulationsNo. 3 Construction plan in minimum composition developed by Supplier Association “Zalktis” (enclosed in a separate attachment)No. 4 Building structures - explanatory description to MBPNo. 5 Calculations of the building structures (enclosed in a separate attachment)No. 6 Calculation of the energy performance assessment (enclosed in a separate attachment)No. 7 Water-supply and sewage (internal) - explanatory description to MBPNo. 8 Water-supply and sewage (external) - explanatory description to MBPNo. 9 Electronic communications systems - explanatory description to MBPNo. 10 Heating, ventilation, air conditioning - explanatory description to MBPNo. 11 Power supply (internal networks) - explanatory description to MBPNo. 12 Power supply (external networks) - explanatory description to MBP

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No. 13 Overall development concept of the Daugava Stadium territory and minutes of Council for Preservation and Development of Riga Historic Centre (enclosed in a separate attachment)

No. 14 Minutes of Council for Preservation and Development of Riga Historic Centre (enclosed in a separate attachment)

No. 15 List of premises and Table of finishing works (enclosed in a separate attachment)No. 16 Principal solutions of lighting of the ice arenas (enclosed in a separate attachment)No. 17 Calculation of lights for the ice rinks (enclosed in a separate attachment)No. 18 Assessment of the trees (enclosed in a separate attachment)No. 19, No. 19A Topographic-engineering survey (enclosed in a separate attachment)No. 20 Geotechnical research (enclosed in a separate attachment)No. 21 Design for work performance (DOP) - explanatory description to MBP (enclosed in

a separate attachment)No. 22 DOP Master plan to MBP (enclosed in a separate attachment)No. 23 Approval of MBP by the National Cultural Heritage Board (enclosed in a separate

attachment)No. 24 Technical and economic substantiation for the selected heat-supply solutionNo. 25 Overview of the fire security measuresNo. 26 Tree assessment by “Labie koki”, recommendations for the period of constructionNo. 27 Master plan - possibility to replant the treesNo. 28 Tree plantationsNo. 29 Concept of overall greening of the territory considering the territory of the Ice hallNo. 30 Explanation regarding the tree plantation and replanting of the heritage tree affecting

construction of the Ice hallNo. 31 Approval of the Concept by the Riga City Council Department of DevelopmentNo. 32 Additional volume of MBP in line with the additional requirements of the Construction

Board - additional opinionsNo. 33 Possible simplified solution of the roof and façade - visualisations

1.

GENERAL INFORMATION

Territory, Object Territory of the Daugava Stadium, Sports and cultural quarterObject address Augšiela 1, Riga, LV-1009, LatviaReal estate cadastre number

0100 037 2003

Land parcel cadastral designation

0100 037 0175, area 10 3195 ha

Contracting party,Real estate owner and operator

VSIA „Kultūras un sporta centrs „Daugavas stadions””, Reg. No. 50003140671

Contracting authority’s address, phone

Augšiela 1, Riga, LV-1009, Latvia, tel. 67844800

Type of reconstruction New buildingGroup of the building 3rd group buildingDesign stage Construction plan;

Approval of the construction plan by public and municipal authorities, obtaining an accept;Obtaining a building permit regarding compliance with the design development conditions

Construction works Obtaining a building permit with the conditions for launching construction worksConstruction works;

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Obtaining an opinion regarding the object’s operational readiness;Deed on acceptance/ putting the object into operation

Author supervision Controlling the compliance of the construction works with the construction plan

Task 1) To develop a construction plan for the Ice Hall based on the construction plan in minimum composition prepared by Supplier Association “ZALKTIS” (MBP) and the overall development concept for the Daugava Stadium territory, and these technical specifications; the Program of premises application which is enclosed in these Technical specifications, as well as the building permit with the conditions for design development and IIHF OFFICIAL RULE BOOK 2018 – 2022.

2) To perform construction works of the Ice Hall according to the construction plan.

3) During the construction works, only use the territory provided for the construction works observing the safety rules applicable to public events during UEFA games and School Youth Song and Dance Festival 2020.

Description of the object and the current situation

The object is located within the territory of the Daugava Stadium, and according to the construction plan in minimum composition, it is situated within the zone between the stands of the Daugava Stadium and Augusta Deglava Street. The object Daugava Stadium is subjected to the protection applied to the zone including a national monument of city planning Historic Centre of Riga (State protected monument No. 7442) and a UNESCO World Heritage Site No. 852 Historic Centre of Riga (RVC).By Ruling No. 455 of Cabinet Regulation of 16.98.2016 “On granting the status of national interest to the territory of the Daugava Stadium”, the territory of the Daugava Stadium territory was granted the status of national interest.

2.

GENERAL REQUIREMENTS FOR PREPARATION OF TENDER PROPOSALS OF “DESIGN AND BUILD”

2.1. During the procurement procedure, a Contractor is obligated to fully familiarise themselves with the subject-matter of the procurement, identify all possible risks that may arise during the construction, survey the building site and the adjacent territory in order to assess it while preparing a tender proposal. If required, it is possible to visit the Object’s territory multiple times while preparing a tender proposal and to perform a repeated survey in order to specify the information during the tender proposal preparation and evaluate the Contracting authority’s requirements.

2.2. During the tender proposal preparation, a Contractor assumes full responsibility and risk concerning performance of all and any research and acquiring information necessary for development of a construction plan and conducting construction works.

2.3. When preparing a tender proposal, a Contractor as a professional of their field must identify and anticipate all the works to be performed before putting the object into service - everything related to development of a construction plan, construction works and author supervision,

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including but not limited to plan the costs for calculation of energy performance, designing, approval of the construction plan, mobilisation of the workforce, arrangement and maintenance of the building site, a notice board with the funding body’s name etc.; drawing up the needed executive documentation, verification of construction materials and approval thereof with the Contracting authority; for auxiliary works necessary to perform the construction works specified in construction drawings and in the specified volume; all the needed inspections set forth in the normative acts of the Republic of Latvia including inspection of construction materials in coordination with the building custodian. Work surveys Costs of electricity, heating, water, sewage et.c utilities and generally applicable payments during construction works. And other works and measures that are necessary to conduct construction works of the object.

2.4. A detailed schedule of intended designing works with the main types of work is to be submitted to the Contracting authority based on the schedule appended to these technical specifications. The work schedule can be supplemented by detailing certain items, yet deletion of the principal items specified in the schedule is unacceptable.

2.5. If the technical specifications, including any enclosures or items thereof specify any particular name of goods or standards or any other reference to specific origin of the goods, particular process, brand or method, a tenderer may offer and specify equivalent goods or compliance with equivalent standards in their tender proposal conforming to the requirements and parameters in the technical specifications and providing performance as requested in the technical specifications.

3.

TERMS FOR CONSTRUCTION PLAN AND CONSTRUCTION WORKS

3.1. Total Term of construction plan development and intermediate terms shall be determined according to the provisions of the Design-build contract and procurement regulations:

3.1.1. The term for the construction plan development and approval including fulfilment of the designing conditions shall be planned within 5 months as of execution of the contract, but no later than December 31, 2019.

3.1.2. The term of the construction plan development shall include the period while the construction plan is examined (first-time expert-examination lasts for about 1 month from a complete construction plan being submitted to the expert) and, if needed, the term of repeated expert-examination after remedy of the expert’s reprimands (about 2 weeks from all the corrections submitted to the expert).

3.1.3. The term of the construction plan development shall include the period while the construction plan is being approved by the Contracting authority, as well as the state and municipal authorities, including the National Culture Heritage Board and the Riga City Construction Board.

The Contracting authority certifies that the period for the construction plan to be reviewed by the Contracting authority shall be up to 5 building days.

3.2. Total Term of construction plan development and intermediate terms according to the provisions of the Design-build contract and procurement regulations:

3.2.1.The performance term of the construction works, including obtaining a building permit to launch construction works, obtaining all opinions on the operation readiness of the construction, obtaining the construction cadastral survey file, and the deed issued by the State Construction Control Bureau on putting/acceptance of the construction into service shall not exceed 12 months from the construction plan being accepted, but no later than December 31, 2020.

3.2.2. Adjustment of the built systems and equipment, ice laying, and transfer of the Object to the Contracting authority by January 31, 2021.

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4.

APPLICABLE NORMATIVE ACTS

4.1. When developing the construction plan, the existing normative acts of the Republic of Latvia, regulations and Cabinet Regulations, as well as requirements of the Latvian national standards must be observed.

4.2. Any deviations from the technical requirements set forth in the normative documents regulating construction are allowed in the Construction plan according to the procedure provided in the Construction Law (after approval by the respective state and municipal authorities provided such alternative technical solutions ensure compliance with the essential requirements applied to constructions).

4.3 In case the Technical specifications or the enclosures thereof indicate lower requirements than those set forth in the Latvian construction standards and regulations, the latter must be applied.

5.

MAIN CONDITIONS FOR THE CONSTRUCTION PLAN DEVELOPMENT

5.1. Terms of reference

To develop and approve at the competent authorities a construction plan of the Ice Hall. To perform the design work in accordance with the effective legal acts of the Republic of Latvia (law, regulations, standards), technical regulations issued by the state and local authorities and any special regulations therein. Within the scope of construction plan development:

5.1.1. Perform preparatory works for construction planning , if any are needed for the previously developed Construction plan in minimum composition (hereinafter referred to as - MBP), they are determined by the conditions of a building permit or any other documents or it follows from any other considerations in order to develop a quality construction plan;

5.1.2. Develop a Construction plan compliant with the MBP solutions, these technical specifications and Program of premises application;

5.1.3. The Contracting authority authorises the Contractor to offer such solutions while detailing MBP during development of a Construction plan that allow falling in the funds available to the Contracting authority. Furthermore, any construction materials must be selected during development of a Construction plan and construction works so that the funding limits available to the Contracting authority be observed. Hence the Contractor shall be entitled to offer alternative finishing materials to those defined in MBP, nevertheless without altering the requirements to the work or material quality.

Namely, the Contractor shall be entitled to offer alternative solutions for the façade and finishing elements provided it has been approved by the Riga City Construction Board and the National Culture Heritage Board during development of the Construction plan.

5.1.4. To obtain a positive opinion of the expert-examination;

5.1.5. To obtain an approval of the Construction plan from the Contracting authority's and the indicated thereby users (will be defined during development of the Construction plan) of the premises;

5.1.6. To obtain an approval of the construction plan from the National Culture Heritage Board, if needed to promote the matter to be reviewed by the Board of Preservation and

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Protection of the Historic Centre of Riga; to obtain an approval of the construction plan by the Riga City Construction Board, and to obtain a building permit regarding compliance with the designing conditions.

5.2. Construction plan documentation to be submitted to the Contracting authority

5.2.1. A developed and fully approved documentation of the Construction plan shall be submitted to the Contracting authority in 2 (two) original colour printed copies (with all the signatures and approvals); one colour duplicate in identical copies and 2 (two) electronic copies in CDs or similar data carrier (*.pdf and *.dwg).

5.2.2. Additionally, 1 original colour print copy (with all the signatures and approvals) and 1 (one) electronic copy in a CD or a similar data carrier (*.pdf and *.dwg) are to be submitted to the building custodian.

5.2.3. Additionally, the Contractor shall provide all the other copies of the construction plan to be submitted to the state and municipal authorities.

5.2.4. A design estimate shall be submitted on a separate CD or any similar data carrier (*.xls format).

5.2.5. The Contractor shall obtain from the competent officer of the Riga City Construction Board a note in the Building permit regarding the compliance with the designing conditions and then submit the original Building permit to the Contracting authority.

5.3. Design development performance rules and quality control

5.3.1. When developing the Construction plan solutions, the funds available to the Contractor shall be considered. If it appears during design development that the solutions may affect the initially estimated costs of the construction works, the Contractor shall timely, in line with the Contract provisions, notify the Contracting authority in order to enable a decision on a possible adjustment of such solutions.

5.3.2. The Construction plan shall be developed in such a manner that the total construction costs (design development, construction works, author supervision) do not exceed the available (granted and confirmed) funding, i.e. EUR 10’555’000.00. The scope of works included in the Construction plan shall be clear and unambiguous.

5.3.3. Such engineering equipment, finishing materials and interior elements (e.g., doors etc.) shall be provided for that would not unduly increase the costs of construction and maintenance of the object. Any selected materials shall be agreed with the Contracting authority.

5.3.4. The designer shall ensure that the technical solutions are mutually agreed in all the parts of the Construction plan, including the architectural - building structures part, the parts regarding water-supply, sewage, preparation of firewater, heat-supply, ventilation, cold supply, power supply etc. Mutual agreement of different parts of the Construction plan includes location of the systems, identification of their intersections and compatibility. The Construction plan shall indicate the needed distances beneath mechanical, power supply and low intensity current installations; distances from the walls or ceiling, as well as the equipment weight.

5.3.5. The designer shall be obligated to inform the Contracting authority about alternative options prior to application of any principal solution. When evaluating those, the most appropriate solution for the particular situation shall be agreed with the Contracting authority.

5.3.6. The Construction work performance design shall be elaborated in a close cooperation with the Contracting authority providing for a safe order of construction works in the

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Object, considering the Contracting authority’s information regarding operation of the adjacent property during the construction works (sport and public events).

5.3.7. The Construction plan shall comprise all detail drawings needed to implement the separate parts and elements of the construction plan; and the Contractor shall elaborate drawings of the structural assembly units by indicating precise and detailed specification and requirements for the materials used in order to ensure quality construction work performance.

5.3.8. The Construction plan shall provide for protective sleeves, flexible couplings and expansion joints in the places where cracking is to be expected potentially caused by internal stresses, temperature fluctuations, deformations etc. (for instance, concrete structures).

5.3.9. The solutions shall apply modern materials and equipments in order to enable use of progressive and rational construction methods reducing the construction period of the structure, construction costs, structure operation costs, as well as extending the life-time of the structures.

5.3.10. The explanatory memorandum to each design part shall include an elaborated description of the quality level for the main types of work and the respective control criteria (for instance, the conditions to observe to provide quality assembly of windows, floor construction, assembly of pipes etc.).

5.3.11. During the entire period of designing and construction, any mistakes and shortcomings committed in the Construction plan shall be rectified at the expense of the design authors.

5.3.12. The Contractor shall be obligated to submit the elaborated parts of the Construction plan to the Contracting authority in the timely manner. No approval of the Construction plan granted by the Contracting authority shall exempt the Contractor from the liability for the quality of the solutions applied in the Construction plan, their compliance with the contract provisions and contract terms.

5.3.13. The designer shall perform any needed alterations following the instructions specified by the expert-examination of the Construction plan to obtain a positive expert opinion regarding the Construction plan.

5.3.14. When preparing the Construction plan, the designer shall perform the calculations needed for the Construction plan, prepare specifications and descriptions of the applied materials and equipment so that the Contracting authority or selected thereby consultants and experts might verify the accuracy thereof and the quality of the Construction plan, including the energy performance of the structure.

5.3.15. The Contractor shall submit the prepared estimates to the Contracting authority electronically (including the formulas) so that the selected by the Contracting authority consultants and experts might verify the accuracy thereof.

6.

REQUIREMENTS FOR PREPARATORY WORKS OF THE CONSTRUCTION PLAN DEVELOPMENT

The preparatory works of the construction plan development shall be conducted according to Cabinet Regulation No. 500 of August 19, 2014 “General Construction Regulations”, considering MBP, the structure volume indicated in the Technical specifications and the Program of premises application, the requirements of the Contracting authority, the Riga City Construction Board and other competent authorities and the normative acts regulating construction.

Within the scope of the preparatory works of the construction planning, the Contractor shall perform:8

6.1. Calculation of the consumption of the needed electricity, thermal energy, cooling, ventilation, capacities and water and sewage systems or adjustment of the calculations within MBP in line with the Program of premises application;

6.2. Requesting and obtaining from the state and municipal authorities all and any required Technical and special regulations that may be needed in addition to those already obtained at the MBP stage;

6.3. Obtaining approvals for the alterations made in the technical regulations or requesting new ones etc. if the respective conditions or parameters change during design planning;

6.4. Engineering survey of the territory if any needed in addition to the survey performed within MBP;

6.5. Geotechnical research of the soil if any needed in addition to the research performed within MBP; processing and summary of the results of such engineering survey to be used in the further design planning.

6.6. By cooperation with the Contracting authority (by engaging experts if required), development of a detailed Design order and agreeing with the Contracting authority based on MBP, these Technical specifications and the Program of premises application. Such Design order shall become an integral part of the contract.

7.

REQUIREMENTS FOR CONSTRUCTION PLAN DEVELOPMENT

7.1 The Construction plan is to be developed based on the layout and principal solutions of MBP and the Territory development concept based on Council for Preservation and Development of Riga Historic Centre.

7.2. Any manufacturers of the technical units, equipment and other products specified in MBP are provided as an example to indicate the quality requirements for products. Replacement of the specified materials and equipment with analogue products of other manufacturers and observing the quality and technical requirements by agreeing the technical units and project solutions with the design author prior to launch of construction works and equipment commissioning.

7.3. The responsible manager of construction plan is responsible for coordination of works among separate design parts and their mutual concord, as well for compliance of the design with the Latvian construction standards, technical regulations, the requirements of these Technical specifications, the Program of premises and the Design order.

7.4. The certified manager of each part or section of the construction plan is responsible for the respective part or section of the plan designed thereby and for approval thereof by the respective controlling and monitoring bodies.

7.5. The Construction plan and parts thereof shall be elaborated up to such volume and extent of detail that allows performance of construction works and implementation of the construction plan without any delay, as well as timely determine the expected costs and specifications of the works under the construction plan, the materials, and the equipment.

7.6. Any solutions of the Architectural (AR) part, Building structures (BK) part and all required internal engineering networks of the Construction plan are to be elaborated based on the calculations previously performed during the MBP development (by performing additional survey if any needed).

7.7. The solution within the Construction plan must guarantee capacity, resistance, strength and durability of the structure and individual elements thereof (incl. building structures and structural elements) in line with the requirements and needs of the construction standards

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and Contracting authority. The Construction plan must ensure fire security, labour and environment protection during construction and operation.

7.8. The solution within the Construction plan must ensure performance of the construction, as well as improvement of utilities within the limits of the adjacent territory design, and performance of other works pursuant to the effective normative acts of the Republic of Latvia.

7.9. The Contractor shall promptly notify the Contracting authority regarding any deviations if any possible from the Design order or MBP. Any deviations from the design solution that may significantly affect the general implementation of any design solution must be agreed with the Contracting authority and introduced in all other design parts affected thereby. Prior to launching any work, the Contractor shall verify the dimensions specified in the drawings and in case of inconsistencies or incompliances shall address the construction plan authors to eliminate the uncertainties before launching the work.

8.

MEASURES OF ENVIRONMENTAL PROTECTION

8.1. Only environmentally friendly solutions shall be provided in the Construction plan. A tenderer must provide for employment of such construction methods not contaminating soil, water and air in the adjacent territory and along the roads where construction materials are transported. Such protection measures shall be planned that restrain the impact of noise, smell, vibration etc. harmful factors to the personnel situated on the building site as well as neighbouring residents or individuals walking or driving by.

8.2. The construction materials used in construction must not discharge any toxic substances; the materials or structures must not cause any hazard to the environment and human health during the construction works or the further operation of the building. When selecting among several materials with equivalent qualities, the decision shall be in favour of materials marked with eco-labelling.

8.3. Neither construction of the Object nor the design documentation thereof may provide for any such construction materials or auxiliary materials or ingredients containing:

Asbestos or any other cancerous substances; Substances containing solvents; Fully or partially halogenated substances; Substances affecting (damaging) reproductive health; Fluorine, chlorine, hydrocarbon or other environmental hazards.

9.

ENVIRONMENTAL ACCESSIBILITY

The Construction plan must provide for all solutions related to environmental accessibility outdoors and in the building. Selecting of solutions shall include consultations with “Apeirons, Organization of people with disabilities and their friends” regarding the environmental accessibility for persons with mobility/vision/hearing impairments to be solved within the construction plan.

9.1. The design provides for junctions of kerbs and driveways without any kerbstones thereby excluding formation of any steps invincible for people in wheelchairs.

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9.2. For people in wheelchairs, spectator areas are intended at the level of 2nd floor between the retractable stands and the fixed stands.

9.3. In all the public and dressing-room areas separate properly equipped toilet facilities shall be intended for people with mobility impairment. 8 toilet facilities in total - two of those in the public premises, the others in dressing-room area. Entrances to the toilet facilities shall be designed in such a manner that moving around in a wheelchair be feasible, without any slopes or thresholds. The toilet facilities for people with special needs shall be equipped with handles, handrails, a toilet bowl, a sink, a special adjustable mirror at the sink. The toilet facilities intended for people in wheelchairs shall feature an assistance button (at height 1.20 m from the floor level) so that a disabled person can call for help in case of need, as well as an auxiliary equipment in line with the environmental accessibility guidelines.

9.4. Outer doors shall feature a minimum threshold (up to 2 cm), hence ensuring movement of people in wheelchairs and with mobility impairment.

9.5. For the convenience of people with vision impairments, bright pictograms - labels shall be placed at doors of the premises in the routes of the complex visitors, hence highlighting the wall plane. All the staircases shall feature highlighted first and last step of each flight.

9.6. The banister at the first and last step shall feature a tactile number of the respective floor (palpable number in Braille). Letters and digits of the palpable inscription shall be set off the base, and the letters shall be 35 mm high; 6 mm thick, embossed by 1 mm. The informative tactile tablets at the premises shall be placed next to doors at 1.6  m above the floor level, next to elevators - at 1 m above the floor level. Grammatical accuracy of the Braille inscriptions shall be verified consulting the Library for the Blind.

10.

COMPOSITION OF THE CONSTRUCTION PLAN AND REQUIREMENTS TO THE CONSTRUCTION PLAN SOLUTIONS

10.1. ARCHITECTURAL SOLUTIONS (GP, AR, TS, IN)

To elaborate parts of the Construction plan in accordance with the effective legal acts of the Republic of Latvia (law, regulations, standards), technical regulations issued by the state and local authorities and any special regulations therein.

10.1.1.   Territory part of the Construction plan (GP, TS):

The Territory part shall be designed according to the MBP solutions by planning the main entrances and access roads, territory surfacing, vertical planing, greening, hardscapes, territory lighting, and fencing along the railway. The territory shall provide for a car and bicycle parking space, a stand for a mobile generator, a space for waste containers.

10.1.1.1. The territory fencing shall conform to the MBP solutions. For the acoustic fencing, a lightweight solution shall be proposed without building a monolithic concrete gravel board.

10.1.1.2. The territory lighting shall include the functional and decorative lighting of the territory. The functional lighting of the territory shall feature lamps on poles.

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Number of the lamps shall be decided via analysing the pattern of lighting - light distribution in the territory.

10.1.1.3. The decorative lighting of the territory shall be designed in the zone where a public garden is prospected in the future (between the Ice Hall and Athletic arena (in future). Elements of the decorative lighting shall be presented to and agreed with the Contracting authority and design in line with the decorative lighting of the Athletic arena the principal selection of which will be performed in parallel with construction planning of the ice hall.

10.1.1.4. Commodity elements (benches, waste bins etc.) shall be presented to and agreed with the Contracting authority and design in line with the commodity elements of the Athletic arena the principal selection of which will be performed in parallel with construction planning of the ice hall.

10.1.1.5. Plants and trees shall be selected from the species of plants and trees characteristic to the climate of Latvia. During the Construction planning, the solution for greenery shall be detailed by integrating therein the existing tree groups. Planting of new trees shall be planned according to the MBP master plan. The greenery plan and the tree felling solution shall be agreed with the Riga City Council Greenery Preservation Committee, considering that in the area wherein the ice hall is to be designed there are valuable trees according to to the tree assessment.

10.1.1.6. In the construction area, a valuable tree European beech (“Labie koki” Tree assessment No. 33/21552). Replanting thereof is expected in accordance with the indication of the MBP master plan and explanatory description (Annex to the Technical specifications).

10.1.1.7. An option to provide for charging electric cars and installing an advertising pylon in the parking lot within the limits of funding available to the Contracting authority shall be evaluated.

10.1.1.8. In case the construction plan solutions (GP with the overall plan of engineering networks) cause necessity to demount and move the existing engineering networks, such activity shall be provided for.

10.1.1.9. Solutions for traffic organization shall be developed according to the MBP master plan solutions and agreed with the Riga City Council Traffic Department and taking into account the previously elaborated RD design documentation and built/ planned reconstruction of the adjacent streets in the neighbourhood.

10.1.2. Architectural part of the Construction plan (AR, IN)

10.1.2.1. An architectonic solution of the Construction plan shall be based on the MBP (minimum composition of a construction plan) guidelines and contents, by agreeing the detailed architectonic solutions with the Contracting authority beforehand.

10.1.2.2. Elaborate the floor layout, sections, façades, colour solutions and finishing of the façades, aperture filling, detailing of all the architectural assembly units required to implement all the construction works; specifications, solutions for indoor finishing works, interior elements.

10.1.2.3. Ceiling plans with finishing, location of light fittings; detailed drawings of staircases and banisters; assembly units needed for interior construction shall be elaborated.

10.1.2.4. Table of indoor finishing works (work descriptions, materials to be applied). For representative premises (foyer, coffee-shop etc.), an interior proposal, aperture finishing, coupling of ceiling to walls, coupling of floors to walls, potential conjunctions/ connection units of other materials shall be elaborated.

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10.1.2.5. Façade finishing shall be solved according to the MBP principal solutions and instructions within the explanatory description of AR part. The façades are intended to be illuminated, and they are to feature illuminated advertising inscriptions with the building designation.

Roofing material - PVC membrane with a protection layer of rinsed pebble (or analogue) according to the MBP solutions.

10.1.3. Descriptions and specifications of the main construction products The basic principles are defined in the provisions of the MBP explanatory description. Selection of materials shall be agreed with the Contracting authority and User.

10.1.3.1. Floors In all the public areas (a hall, a shop on the first floor, a hall-way) where visitors do not wear skates - grounded, hardened concrete-paved floor (quartz sand) with proper expansion joints; in the second floor spectator area - epoxy flooring; in the coffee-shop - vinyl flooring.In the areas where athletes move around wearing skates - rubber flooring.In toilet and shower facilities of the dressing-rooms - linoleum.In all the technical and auxiliary premises - epoxy layer on concrete-paved floor. In the public toilet facilities - stone mass tiles. At the entrances, doormat blocks shall be provided for with appropriate drainage. In the second-floor offices, carpet tile flooring shall be provided for. In the work-out unit, specialised rubber flooring shall be provided for. Skirting boards - metal (in the dry areas (except technical rooms)); in the wet areas - rolled-up linoleum.

10.1.3.2. CeilingIn both halls, ceiling, structures and utilities (that are exhibited) shall be painted black; in the public areas - suspended ceiling, EXPAMET modular systems of black painted metal mesh. In the toilet and shower facilities - suspended ceiling of painted moisture-resistant gypsum panel. In the technical premises - painted concrete. In the other premises - modular suspended ceiling.

10.1.3.3. WallsReinforced concrete walls in the public area (hall-ways, halls, a coffee-shop)

shall be exhibited; the others, including the brick walls, shall be plastered, painted neutral light grey with colour accents. In toilet and shower facilities, walls shall be tiled. In both halls, technical areas and auxiliary rooms, the indoor surfaces of outer walls (built of stonewool sandwich panels) along with the structural elements - exhibited and not finished. On the side of the public area, the sandwich walls shall be gypsum panelled and painted.

10.1.3.4. Specification for the glass partitionsIn the glazing design, it shall be provided for the appropriate glass labelling, injury prevention in case of shatter, and protection against falling through to a below level. In the labelling solution between the hall and the neighbouring areas

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(a coffee-shop), it shall be also provided for direct, unobstructed visibility at the eye height.For frames and swinging panels, the shade shall be selected analogue to the finishing of doors placed in the partitions. The shade shall be selected in context with the overall interior solution; the interior solution and individual finishing shades shall be agreed with the Contracting authority.

10.1.3.5. Specifications for door/aperture fillingFor doors (or other swinging parts of a partition wall) in all the building, accessories of a single manufacturer shall be used intended for increased wear resistance. Appearance of the accessories shall be agreed with the accessories of the doors placed in the apertures. For the doors in the entire building, stainless steel door accessories of a single manufacturer shall be used intended for increased wear resistance. Appearance of the accessories shall be agreed with the accessories of the doors placed in the glass partitions.The construction plan shall specify the type of the door accessories and application of a self-closing mechanisms.All the swinging glass apertures in the building - an aluminium frame and glass-packet filling (triple packet where different thermal regimes meet). For non-glass swinging apertures in the public area - laminated wooden doors (paintwork agreed with the accent paint on the walls); appropriate fire security, acoustics and energy performance requirements apply to all. Non-swinging glazing to the halls (windows for spectators) - triple glass packets, providing structural stability thereof. The other doors - of light-coloured laminated wood, and metal doors (in the blocks of technical rooms).For the doors placed in direct route of hockey players and skaters subjected to potential damage by skate-boots - metallic finishing at the relevant height.

10.1.3.6. LiftIn order to ensure vertical transport within the building, a lift shall be provided for in the entrance hall. A solution for the shaft ventilation shall be design in line with the effective regulations. Minimum dimensions of the lift cabin: 1400X1100 mm; minimum door width: 900 mm. The lift shall serve two stops. The lift shall be suitable to people with special needs (cabin size, sound signalling, Braille, visual confirmation). The lift shall be designed without an additional engine room, with an embedment under the bottom stop flooring.

10.1.3.7. Stairs and railingsAll the stairs are made of industrially cast reinforced concrete flights; the hall stairs and 2nd floor ceiling shall have railings - metal planes with a recess for a handrail. For the stands, railings - solid glass (of relevant stability); for the other stairs - a metal frame (of 35*15 mm box profiles and the same kind of filling, step ~100 mm).The railing solutions shall be agreed with the Contracting authority and the User during the construction plan development.

10.1.3.8. Acoustics

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The principal conditions for the indoor acoustics are defined in MBP Explanatory description. The acoustic finishing materials shall be agreed with the Contracting authority.

10.1.3.9. Plumbing

All the plumbing equipment shall be agreed with the Contracting authority during the construction plan development. In the construction plan, plumbing equipment manufactured by Ifö or analogues thereof shall be provided for. Faucets and shower sets manufactured by Ora or analogues thereof shall be provided for. Generally, wall-mounted toilet bowls and urinals shall be provided for. All the waste attendant premises shall be equipped with a stainless steel industrial sink and an additional water valve. In the showers, concealed connections with wall-mounted shower-head and concealed thermostatic shower mixers shall be provided for. In the showers, floor-mounted shower traps with stainless steel covers shall be provided for.In the public toilets, contactless faucets and electric hand dryers shall be provided for and previously agreed with the Contracting authority. In the premises intended for users with mobility impairment, support handrails shall be provided for on both sides of the toilet bowl with an option to lift the handrail from the clear side; in the showers - support handrails, disabled seats and hand-showers; in the anterooms - accessible sinks with faucets of extended lever or contactless faucets. Toilets for users in wheelchairs shall be designed of minimum size 1.6X2.2 m; showers - minimum size 1.8 m.

10.1.3.5. SaunaAn industrially made sauna module shall be provided for. Selection of sauna shall be agreed with the Contracting authority; techno-economical comparison of several options shall be conducted if needed.

10.1.3.6. Exhibited indoor elements of engineering systemsThe visual appearance of such exhibited elements shall be designed in conjunction with the interior concept. Design of the used elements shall be agreed with the Contracting authority during the design planning.

Runs and elements of the ventilation, heating, lighting and other engineering systems shall be specified in conjunction with the interior concept. The runs and elements of engineering systems shall be selected (or painted) in the colour identical or matching, non-contrast to the ceiling finishes.

Solution of the entrance hall interior shall be agreed with the Contracting authority during the construction plan development. Solution of the coffee-shop interior shall be agreed with the Contracting authority during the construction plan development.

10.1.3.7. Indoor lightingThe hall lighting shall be designed in line with the regulations and recommendations.

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For all the areas, the lighting level shall be ensured in line with the testing criteria specified in the regulations. In the hall, lamps with an option to regulate the light diffusion. Lighting of the other areas shall be designed in line with the Latvian Construction Standards. Solutions for lighting and selection of particular light fittings shall be agreed with the Contracting authority and the User.

10.1.3.8. Finishing worksSee a detailed explanation of the indoor finishes in the enclosed list of premises.

10.1.3.9. Signage system

For all the rooms in the building, entrance signage shall be provided for. Any signage shall indicate the function of the room - designation (e.g., WOMAN DRESSING ROOM) and the relevant function icon, and the room number through agreeing with the Contracting authority.

Braille signage shall be provided for.

In the public area of the building, directional signs shall be provided for to the functional groups more important for visitors. Such signs shall indicate a graphic icon, an indication of direction (e.g., an arrow, a staircase icon), transcript, if the sign refers to a function located on another floor - the floor number. Directional signs shall be provided for the direction to the hall (from the dressing-room area), to the dressing-rooms, work-out unit, spectator stands, visitor toilets, administration office area, and the players’ rest area. The room groups to which such directional signage is to be provided and the location thereof in the interior for shall be agreed with the Contracting authority. Signage system of individual design shall be provided for. Both directional signs and functional signage of the premises shall be designed in the same graphic manner - by selecting the same font, identical icons, and identical materials. The signage shall be designed in shade contrasting with the wall; inscriptions and icons shall be designed clearly legible - selecting a shade contrasting with the sign background. The graphic design of the signage system shall be agreed with the Contracting authority during the construction plan development.

10.1.3.10. Electric sign advertising The design shall provide for solutions of placement an electric sign advertising on the main façade. The design shall provide for all required fixings, engineering network installations, sensors and/or control devices. The electric sign advertising - designation of the multifunctional hall - shall be placed on the main façade facing the entrance to the Daugava Stadium. The final version of the advertising text shall be agreed with the Contracting authority. No placement of large or active areas of electric sign advertising on the main façade shall be acceptable.

10.1.3.11. Stands and stand seatsMinimum 750 seats for spectators shall be provided for in the stand with an option to add stands with 150 seats according to the MBP solution.

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In the stand, fixed plastic non-fold seats shall be provided for. The shade shall be matched with the interior; the solution shall be agreed with the Contracting authority.

10.1.3.12. Furniture/ EquipmentAbove the desk, behind the counter (at the place within convenient reach for the administrator), the most important controls, operation indicators of the engineering communications, security surveillance display, cabinet of more often used keys etc. similar equipment shall be placed. In the administrator’s working area, a cash register and needed thereto installations shall be provided for. Detailed layout of the equipment and installations, controls, operation indicators to be places on the counter as well as other requirements, e.g., regarding the work organisation in the hall, shall be specified at the Contracting authority during the construction plan development.

10.1.3.13. Entrance-hall. Showcase of trophiesAn interior solution without detailing. This unit is beyond the scope of

construction works. Provision of an EL connection.

10.1.3.14. Entrance-hall. Showcase for a shop of sports goods.An interior solution without detailing. This unit is beyond the scope of

construction works. Provision of an EL connection.

10.1.3.15. Entrance-hall. Groups of sofas and armchairs. Coffee-shop.An interior solution without detailing. This unit is beyond the scope of

construction works.

10.1.3.16. Furniture in the officials’ premises.An interior solution without detailing. This unit is beyond the scope of

construction works.

10.1.3.17. Furniture in dressing-rooms.An interior solution via consultations with the User.

10.1.3.18. Within the construction plan, floor plans with the layout of furniture and a description thereof shall be submitted to the Contracting authority. Only built-in furniture shall be constructed.Loose units (furniture and loose equipment, e.g., washing machines, sharpening machines, a cooker etc.) shall be procured outside this construction procurement. Fixed and loose units and the division thereof shall be agreed with the Contracting authority.

10.1.3.19. Visualisation Visualisation in environmental context 3D visualisations - a view from the

highest point of the bridge and Augšiela or other site, e.g., bird eye view shall be elaborated according to the requirements of Council for Preservation and Development of Riga Historic Centre defined in the meeting minutes of 06.02.2019.

Indoors, for certain zones (e.g., ice rink, hall, entrance hall, coffee-shop etc.), a 3D visualisation shall be elaborated.

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The Contracting authority shall be entitled to use such visualisation material in presentations and other publications concerning the Ice Hall construction, by notifying the Contractor in advance.

10.2. BUILDING STRUCTURES (BK, BKD)

To elaborate this part of the Construction plan in accordance with the effective legal acts of the Republic of Latvia (law, regulations, standards), technical regulations issued by the state and local authorities and any special regulations therein. See a detailed description in the MBP explanatory description.

10.2.1. Structural layout of the building

10.2.1.1. Foundation. Considering the geo-engineering situation of the construction site, it is intended to support the building on cast-in-situ drill piles of 420 mm diameter. Atop the piles, 600..1000 mm thick monolithic reinforced concrete pile caps shall be used. Beneath the pile caps, a 200 mm compact broken-stone layer with a concrete base layer is intended.

Such foundation solutions shall be designed fro the building that prevent impacting the gas main along A. Deglava Street (bridge).

10.2.1.2. Walls, columns. Walls of monolithic reinforced concrete, claydite concrete blocks. Precast reinforced concrete as well as steel profile columns. Precast reinforced concrete columns are intended to support trusses.

10.2.1.3. Intermediate floors, stands. Intermediate floors are made of precast reinforced concrete hollow-core slabs. Certain floor areas are made of monolithic reinforced concrete. In the central part of the building, stands are made of onolithic reinforced concrete slab.

10.2.1.4. Roof structure. Elements of the roof load-bearing structures - double T steel beams and steel trusses. Atop the trusses and steel beams - Ruukki (or analogue) load bearing steel sheets.

10.2.2. The Building structures part (BK) shall be elaborated a such degree of detail that includes layouts of the main structures, dimensions of the elements, assembly units of the main elements, and volumes of materials. The construction design shall elaborate layouts of the load-bearing structures, assembly units, specifications, reinforcement etc., as well as the calculations to be submitted for the expert-examination of the construction design.

10.2.3. The volume of information and execution of the drawings shall conform to the legal acts and professional standards.

10.2.4. If based on the calculation, any of elements cannot implemented according to the solution provided in MBP, the Contractor shall develop an alternative solution in line with the performed calculation.

10.3. FIRE SECURITY

10.3.1. Such fire security measures shall be provided for that focus at fast and timely fire detection and extinguishing, voice evacuation systems in case of fire (emer-gency), managing evacuation (including smoke curtains in evacuation routes), managing fire extinguishing and rescue activities.

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An option to create a united 24/7 fire alarm monitoring centre for the existing building and to-be-designed building shall be ensured.An option to move a unite 24/7 monitoring centre within the single data transfer network of the existing and to-be-designed buildings shall be ensured.

10.3.2. Fire-resistance and fire-reaction class of the load-bearing structures and strength elements; fire-reaction class of the outer walls and internal construction products; maximum width of the fire partitions and length of evacuation dis-tances, as well as other fire security parameters shall conform to the fire-resist-ance degree pursuant to fire security regulations and provisions of the Republic of Latvia.

10.4. WATER-SUPPLY AND SEWAGE (UKT, UK)

To elaborate this part of the Construction plan in accordance with the effective legal acts of the Republic of Latvia (law, regulations, standards), technical regulations issued by the state and local authorities and any special regulations therein. See a detailed description in the MBP explanatory description.

Any indicated/non-indicated dimensions/diameters of engineering communications are informative and are to be specified during the construction plan development by detailing the particular solutions.

10.4.1. Water-supply External engineering networks

10.4.1.1. To ensure water-supply, a loop territory water pipeline PE100-RC, OD160; of pressure class at least PN10 with a connection port to the existing water main D160 and the existing (to be reconstructed) duct DN800 at Vagonu Street shall be provided for in line wit the technical regulations issued by SIA ‘Rīgas Ūdens”.

10.4.1.1. For the building, two water main inlets shall be provided for to ensure consumption of trade-drinking water, internal fire-fighting water and technological water. Two OD110, PN10 water inlets are intended that are connected to the designed loop PE100-RC, OD160, PN10 water main.

10.4.1.2. In line with the technical regulations issued by SIA “Rīgas Ūdens”, the external fire-fighting water supply shall be ensured from the to-be-designed loop OD160 network.

10.4.1.3. The external water main piping shall be designed of PE100-RC pipes with the minimum pressure class PN10. The construction plan shall include the construction principles of the selected pipelines according to the manufacturer's requirements. At the sites of the duct turns or rapid level changes, fit for purpose supports, collars or fixations shall be provided for to prevent disruption of the pipelines in case of hydraulic impact.

10.4.1.4. The construction plan shall indicate all the required fittings and the sites where the pipeline route changes, branches and stop-valves are intended. The fittings shall be mutually compatible. They shall conform with the pressure class of the pipeline.

10.4.1.5. Such a type of stop-valves application shall be selected that demounting and replacement thereof would be easily practicable if required. Gate valves required at the well shall be designed with hand-wheels. Underground gate valves shall be equipped with an extended stem and cap. Wells and shafts shall be provided for if required.

10.4.1.6. Water metering shall be installed in the technical room of the building, right after the inlet in the building. The water metering hub shall be installed in according to the technical requirements of SIA “Rīgas Ūdens”. Considering the necessity to loop the territory piping, an option shall be assessed to reconstruct the existing

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metering hub ensuring water consumption metering in accordance with the requirements of SIA “Rīgas Ūdens”.

10.4.1.7. The construction plan shall provide for reconstruction/renovation of the existing water main DN800 in line with the technical regulations of SIA “Rīgas Ūdens”. Scope, methods and detailing of the works shall be specified following to requesting separate technical regulations from SIA “Rīgas Ūdens” and other interested authorities.

10.4.1.8. According to the technical regulations issued by SIA “Rīgas Ūdens”, “Rīgas Ūdens” permits cooperation in construction works related to water main reconstruction or laying in an additional sleeve. Involvement of all the parties Contracting authority/ Contractor/ “Rīgas Ūdens” shall be solved during the construction plan development. The Contracting authority allows for a possibility that the external engineering networks, certain ŪK engineering networks may be designed in terms of a separate construction plan so that they be implemented within the specified construction performance term.

10.4.2. Sewage (UKT - External engineering networks)

Household sewage External network

10.4.2.1. Gravity pipeline of household sewage shall be provided for with a connection to the pipe of A. Deglava Street. At the connection site, a new household sewage manhole shall be built.

10.4.2.2. If gravity drainage of the household sewage is not practicable, pump stations for household sewage shall be provided for.

10.4.2.3. The household sewage networks shall be equipped with maintenance manholes according to the requirements of the Latvian Construction Standards etc. normative acts to ensure convenient and safe operation of the network.

10.4.2.4. The manhole covers shall be easily openable and made of ductile iron. For manholes located beneath a driveway (asphalt concrete pavement), cast iron cover of the ‘floating” type, load class 400 kN shall be provided for.

Stormwater sewage External network

10.4.2.5. Stormwater sewage shall be designed considering layout of the parking lots and access roads, the territory commodities and location of building on the land parcel.

10.4.2.6. To collect stormwater from the solid surfaces, gullies shall be provided for. The gullies shall be industrially manufactured with sandtraps. The gullies shall be equipped with easily openable and removable perforated cast iron covers and frames of the respective weight capacity.

10.4.2.7. The stormwater sewage wells shall be places according to the requirements of the Latvian Construction Standards etc. normative acts to ensure convenient and safe operation of the networks.

10.4.2.8. The external stormwater sewage network must also ensure drainage of stormwater from the roof of the building and drainage of artificial snow and ice melting water from the building.

10.4.2.9. The stormwater shall be infiltrate within the territory of the object by applying modular infiltration system. Configuration and location of the modular elements shall be specified at the stage of the Construction plan development.

10.4.2.10. Before infiltration of stormwater, sand and oil separators shall be provided for.

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10.4.3. Water-supply (UK - Internal network)

10.4.3.1. Cold, hot and circulation water-supply system shall be designed according to the principal solutions of MBP and the architectural part.

10.4.3.2. Type of the material, fastenings and couplings shall be provided for according to the recommendations of the pipe manufacturers and shall be agreed with the Contracting authority.

10.4.3.3. Both concealed and built-in, and unconcealed pipeline trace shall be provided for. Unconcealed pipes shall be provided for the technical rooms. In the other rooms, selection of concealed or unconcealed pipes shall be agreed with the Contracting authority.

10.4.3.4. The technological premises (server rooms etc. specific technological rooms ensuring operation of the principal functioning of the object) must not be crossed by any pipes.

10.4.3.5. The water main systems shall be equipped with sufficient number of block valves so that zonal cutting-of be feasible (the zoning shall be agreed with the Contracting authority), and to cut off the risers, empty and fill the risers.

10.4.3.6. For hot water circulation, balancing fittings shall be provided for.

10.4.3.7. The pipes shall be insulated in order to ensure condensation protection of the cold water main and to ensure that temperature drop between the source and the consumer in the hot water circulation loop would not exceed 2 C.

10.4.3.8. Separate water metering (to be specified during the Construction plan development and agreed with the Contracting authority) shall be provided for the block of national team dressing-rooms; each shower block at dressing-rooms, the coffee-shop premises etc. at the Contracting authority’s discretion.

10.4.3.9. The pipes crossing the wall and ceiling structures shall be equipped with protective sleeves and a relevant fire protection solution.

10.4.3.10. In case there are sites where pipes of ŪK systems are built in unheated rooms, heating with electric cables shall be provided for.

Cold water-supply

10.4.3.11. Cold water-supply shall be provided for toilet facilities, catering areas and the ice laying technology.

10.4.3.12. The main pipelines and risers of the cold water main system of PVC multi-layer pipes D25÷110 mm shall be provided for. Branches and branch pipes to soil appliances of PVC multi-layer pipes D16÷25 mm shall be provided for. To prevent potential condensate on the cold water pipes, the pipes shall be insulated with cellular rubber 13 mm thick.

10.4.3.13. Within the perimeter of the building, several frost-proof watering taps (the location shall be agreed with the Contracting authority) shall be provided for. The frost-proof watering taps shall be provided with a cutting-of option indoors.

10.4.3.14. To support control and maintenance of the pipes and stop-valves, all the soil appliances shall be equipped with inspection chambers. The inspection chambers to be built in the wall or shaft structures, shall be equipped with proper openable covers. Selection of material for the chambers depends on their location (in a wall, a shaft, ceiling, floor etc.) and it shall be agreed with the AR Part of the design.

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Fire-fighting water-supply

10.4.3.15. The internal fire-fighting system shall be constructed of steel pipes with fittings of press or “coupling” type.

10.4.3.16. For the internal fire-fighting, fire-fighting taps of full equipment shall be provided for in line with the requirements of UPP and the normative acts.

10.4.3.17. If required, pressure boosting pump stations shall be provided for.

Hot water, circulation and warm water supply

10.4.3.18. Hot water-supply shall be provided for toilet facilities, catering areas and the ice laying technology.

10.4.3.19. Hot water preparation is intended in the heating unit. The hot water-supply system is intended with circulation. For the shower facilities, a service pipe of warm water shall be provided for.

10.4.3.20. The main pipes and risers shall be mounted in the concealed manner in shafts above the suspended ceiling and in the partition walls (the solution shall be specified in AR part of the design) applying PVC multi-layer pipes Ø25÷110 mm.

10.4.3.21. The branch pipes to the soil appliances shall be mounted of PVC multi-layer pipes Ø16÷25 mm. To regulate the flow in the hot system mains and branches, stop-valves are intended on the branches; and on the circulation system - a balancing valve.

10.4.3.22. For hot water, circulation and warm water-supply system, heat insulation shall be provided of at least - Ø16÷25 mm pipes – b= 20mm; Ø32÷40 mm pipes – b= 30mm; Ø50÷63 mm pipes – b= 40mm;

Technological water-supply

10.4.3.23. Separate water-supply shall be provided for to ensure the technological process of ice preparation. Detailed consumption of the technological water and the respective heating load shall be specified during the construction plan development according to the ice laying technology and the capacity load prospects of the rink.

10.4.3.24. To ensure the technological process of ice preparation, water treatment (deironing and softening) equipment and reverse osmosis systems shall be provided for.

10.4.3.25. To collect the treated (prepared) water and collect hot water, water tanks shall be provided for.

10.4.3.26. At the site of distribution, temperature of at least 70°t shall be provided for the technological water.

10.4.4. Sewage (UK - Internal network)

10.4.4.1. Sewage systems shall be designed in line with the principal solutions of MBP, the architectural part of the design and the Contracting authority’s requirements.

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10.4.4.2. Both concealed and built-in, and unconcealed pipeline trace shall be provided for. Unconcealed pipes shall be provided for the technical rooms. In the other rooms, selection of concealed or unconcealed pipes shall be agreed with the Contracting authority.

10.4.4.3. To ensure control and operation, revision and access manholes shall be provided for.

10.4.4.4. Type of the material, fastenings and couplings shall be provided for according to the recommendations of the pipe manufacturers and shall be agreed with the Contracting authority.

10.4.4.5. The pipes crossing the wall and ceiling structures shall be equipped with protective sleeves and a relevant fire protection solution.

10.4.4.6. Sufficient number of maintenance manholes shall be provided for the system, and access to the manholes shall be ensured; such access shall be ensured in the building architecture if required.

10.4.4.7. Each connection to the sewage system shall be secured against odour nuisance in the room.

Domestic sewage

10.4.4.8. Drainage of domestic waste water from the toilet facility areas shall be provided for according to the location of soil appliances and the layout indicated in the AR part, and to the Contracting authority's requirements.

Stormwater sewage

10.4.4.9. Collection of stormwater from the building roof is intended by means of gutter funnels. The gutter funnels shall be provided with electric heating.

10.4.4.10. The stormwater pipes placed in the building shall be provided of HDPE pipes with EM fittings. Insulation b=13 mm shall be provided for.

Industrial sewage

10.4.4.11. For the catering area, industrial sewage shall be provided in accordance with the kitchen technology, the layout in AR part, and the Contracting authority’s requirements.

10.4.4.12. A grease trap shall be provided for.

Technological sewage

10.4.4.13. Sewage for condensate drainage shall be provided according to the solutions elaborated in the AVK part of the construction plan.

10.4.4.14. Sewage shall be provided to drain melt water. If required, treatment and infiltration of melt water in the object’s territory shall be performed.

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Single requirements

10.4.4.15. Within the building limits, systems must not be merged. Systems K1 and K2 shall have natural ventilation.

10.4.4.16. Types of the pipe materials, fastenings and fittings shall be agreed with the Contracting authority and the design architect.

10.4.4.17. The technological premises (server rooms etc. specific technological rooms ensuring operation of the principal functioning of the object) must not be crossed by any pipes. In the other rooms, selection of unconcealed pipes shall be agreed with the Contracting authority.

10.4.4.18. Sufficient number of maintenance manholes shall be provided for the system, and access to the manholes shall be ensured; such access shall be ensured in the building architecture if required.

10.4.4.19. In order to prevent odour nuisance from the sewage, each connection to the sewage system shall be equipped with a ball syphon.

10.4.4.20. The system shall be insulated in order to prevent condensation.

10.4.4.21. Fittings used in the stormwater sewage shall have sufficient pressure resistance to prevent any pipe rupture in case of clog or fill in the local or municipal networks.

10.4.4.22. In areas where pipes of ŪK systems cross fireproof structures, a fireproof assembly unit shall be provided for.

10.4.4.23. In case there are sites where pipes of ŪK systems are built in unheated rooms, heating with electric cables shall be provided for.

10.4.4.24. In order to drain condensate from air conditioning systems (based on the task from the AVK part), a condensate sewage system shall be designed.

10.4.4.25. In areas where no gravity drainage of condensate is feasible, the technical units shall be equipped with condensate pumps. The equipment shall be specified in the AVK-K part of the design.

10.5. EXTERNAL NETWORK OF HEAT-SUPPLY (SAT)

10.5.1. The Part of the external heat-supply (SAT) of the Construction plan shall be elaborated in a separate volume in line with the

technical regulations issued by AS “Rīgas siltums”.

10.5.2. Number of the volumes shall confirm to the requirements of AS “Rīgas siltums”. After approval,

the volumes will be submitted to AS “Rīgas siltums” to build the external connections.

10.5.3. When designing the external networks and selecting pipe diameters, the construction limits and heat rate of

the prospective buildings shall be considered.

10.5.4. In the design, it shall be considered that the boiler room providing heating to the Central stand, is to be demolished as it is located within the limits of the designed Ice Hall. A solution needs be developed to switch heating of the Central stand to the networks of “Rīgas siltums”. A solution needs developed to ensure continuity of heating for the Central stand. Furthermore, solutions for reconstruction of the heating units existing in the Central stands so that the heating units to be disconnected of the gas fired boiler room could be connected to the heating networks of “Rīgas siltums”.

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10.5.5. The external heating networks (heating main) up to the inlet into the building according to the solution to be elaborated in the construction plan and to be agreed with AS “Rīgas siltums” shall be constructed by AS “Rīgas siltums” by executing a separate investment agreement with the Contracting authority. Construction works of the said heating main (up to the inlet into the building) shall not be considered in the Contractor’s financial tender.

10.6. HEATING UNIT

10.6.1. The design shall include arrangement of a heating unit.

10.6.2. The heating unit shall ensure the heat output capacity needed for heating, ventilation, heat-supply, and preparation of hot water.

10.6.3. It is planned to build an individual heating unit for heating, ventilation and hot water preparation to be connected through a separated scheme - two-step, with automatic temperature control depending on the outdoor temperature.

10.6.4. Before and after the heating unit, stop-valves shall be installed on the feeding and reverse pipes.

10.6.5. All the equipment shall be installed more than 400 mm above floor level. Minimum 700 mm clearance shall be ensured around the equipment. Among the outer surfaces (with insulation) of adjacent pipes at least 100 mm distance shall be provided.

10.6.6. The reinforcement required for de-aeration shall be placed at the highest parts of the heating unit, that for water discharge - at the bottom parts.

10.6.7. The system behind the heat exchanger of ventilation heaters shall be filled with 35% ethylene glycol solution. At the ventilation units, automatic mixing boxes shall be installed.

10.6.8. On the additional feed line of the heating loop, an impulse water meter shall be installed.

10.6.9. An automatic control block with software diagram shall be installed for to ensure the system control.

10.6.10. The condition of the SM room shall comply with the requirements set forth in the fire security regulations and hygiene standards. The room shall be secured against unauthorised access.

10.6.11. The automatic switches and the processor intended for the electrical installations shall be installed in a single switchboard.

10.6.12. The heating system pipes shall be insulated according to the “Technical regulations”.

10.6.13. All metal parts of the equipment likely to become energized shall be earthed according to the existing regulation.

10.6.14. Solutions for the heating units to be reconstructed in the Central stands shall be developed.

10.7. HEATING, VENTILATION, AIR CONDITIONING (AVK)

10.7.1. Overall requirements:

10.7.1.1. All the systems to be designed shall have calculations performed regarding the aerodynamic, hydraulic and ventilation system noise; as well as shall have

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explanatory memoranda and material specifications, construction drawings to the design to ensure complete and quality information for implementation of the respective design solution during construction process. The system pipes and the main units shall have mutually adjusted across the AVK, UK, EL, AR, and BK parts of the design.

10.7.1.2. Parameters for the replacement air calculation

Season Temperature Relative humidity

Winter - 20.7°C 90%Summe + 27.0 °C 60%

When the parameters for the replacement air calculation increase during summer or drop during the heating season, change of the parameters for the indoor microclimate calculation us acceptable in proportion to the temperature and humidity fluctuations of the replacement air.

10.7.1.3. The indoor noise level shall be assumed according to Latvian Construction Standards 016-15 “Construction acoustics” and LVS CR 1752 “Ventilation for buildings- Design criteria for the indoor environment” Category B.

10.7.1.4. Designing of refrigeration and air dehumidifying systems shall be based on the principal scheme included in MBP. Prior to selection of the units, the technological order shall be obtained from the Contracting authority regarding the rink utilisation, expected operation modes etc. information relevant for the design development on which the accurate calculations of the needed capacities and air volumes shall be based.

10.7.2. Heating and heat-supply systems

10.7.2.1. Prior to selecting the type of a room heating, it shall be agreed with the Contracting authority, e.g. - a radiator, underfloor heating, thermopanels. Floor heating shall be designed for dressing-rooms and shower facilities.

10.7.2.2. Heatcarrier temperature:

Radiator heating system 80/60°C; Ventilation heat-supply system 80/60°C (35% ethylene glycol solution); Floor heating - as per the calculation.

10.7.2.3. Indoor temperature:

Covered ice hall 8-10°CAthletes/Coaches’ dressing-rooms 20°CIn the clothing drying rooms, such temperature shall be provided for that 20 hockey outfit sets can be dried within 12h.Emergency aid rooms 24°CRooms for staff, production, offices and alike 24°CEntrance hall 18°CSkate rental 18°CIce processing room 15°CCoffee-shop area 19°C

10.7.2.4. The heating system shall be designed providing for balancing and controlling options considering the functional needs, solar impact and timetables. The building

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heat-supply system shall be controlled from the building BMS to optimise the resource consumption and make the building management convenient.

10.7.2.5. At the riser branches, stop-valves and discharge valves shall be provided for.

10.7.2.6. The type, fastening and connection of radiators shall be agreed with the Contracting authority prior the design development.

10.7.2.7. The radiators shall be equipped with the thermostatic valve with a control option.

10.7.2.8. The heating system shall have heat insulation installed wherein the type and thickness of the insulation shall be techno-economically grounded.

10.7.2.9. At the top parts of the system, automatic deaeration devices shall be provided for.

10.7.2.10. The heating systems shall have variable heatcarrier flow to ensure pressure control in the system.

10.7.2.11. The energy performance of the circulation pumps shall not be below class “A”.

10.7.2.12. The design shall be provided for an ice melting pit for each hall the melting capacity of which shall be specified during the design planning. Dimensions and required capacity of the pit shall be agreed with the Contracting authority.

10.7.3. Refrigeration system, ice preparation

10.7.3.1. Chillers with CO2 as the refrigerant shall be selected.

10.7.3.2. For calculations of the external capacity of the refrigeration system, replacement air temperature + 35°C and relative humidity 55%.

10.7.3.3. Water/ethylene glycol mixture shall be used for heating the ice rink ground and ice freezing. The loop branches of the collector shall be equipped with a control and stop-valves.

10.7.3.4. Heat recovery from the chillers shall be provided for. The recovered heat shall be used for adsorption dehumidifier, air heating, building heating, hot water, and heating technological water.

10.7.3.5. A potential connection for heating the football pitch shall be provided with the chiller heat recovery system. The principal solution of the connection shall be agreed with the designer of the football pitch heating system or the Contracting authority.

10.7.3.6. For drainage of the surplus (non-usable) heat, instalment of a drycooler shall be designed on the building roof.

10.7.3.7. The unit shall be equipped with automatics and a potential connection to the building BMS system.

10.7.4. Air-conditioning system

10.7.4.1. For calculations of the external capacity of the air-conditioning system, replacement air temperature + 35°C and relative humidity 55%.

10.7.4.2. Temperature of the refrigerant (35% ethylene glycol solution) for the air-conditioning systems 7/12°C.

10.7.4.3. Refrigeration of the air-conditioning units and ventilation systems shall be provided by central water cooler - chillers to be place in the technical rooms in the power unit or outside the building - the place shall be agreed with the Contracting authority in advance.

10.7.4.4. Requirements for air-conditioning unit (chiller):

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10.7.4.4.1. Accumulation tank 1000 L.

10.7.4.4.2. Soft start of compressors.

10.7.4.4.3. Connection of the chiller to the building BMS system.

10.7.4.4.4. Ventilator control - inverter type - to reduce air production and enable the chiller operation at low outdoor temperatures.

10.7.4.4.5. Anti-vibration supports - spring type.

10.7.4.4.6. A trash rack for the air cooled heat exchanger.

10.7.4.4.7. Flow switch.

10.7.4.4.8. A protection panel for the control display.

10.7.4.4.9. Protection panels for the condenser.

10.7.4.4.10. A stop-valve on suction line of each condenser.

10.7.4.4.11. A stop-valve on discharge line of each condenser.

10.7.4.4.12. Visual reading dials for the high and low pressure shall be provided.

10.7.4.5. Air-conditioning system shall be provided for the rooms where probability of overheating exists in summer. The rooms where air-conditioning systems are to be designed shall be agreed with the Contracting authority.

10.7.4.6. The type, fastening and connection of the conditioners shall be agreed with the Contracting authority prior the design development.

10.7.4.7. The system shall run on 35% ethylene glycol solution.

10.7.4.8. Stop valves and system drain valves shall be installed on the main pipes and branches. At the peak points, automatic deaeration valves shall be installed.

10.7.4.9. Condensate drainage from the internal parts of the conditioners shall be provided for. A task shall be elaborated for the developers of the UK part of the design.

10.7.4.10. For the server rooms, separate freon cooling systems shall be provided for, through agreeing the needed capacity with the Contracting authority during the design planning.

10.7.5. Ventilation system

10.7.5.1. Mechanic plenum-exhaust ventilation systems shall be designed. Air recuperators, water air-heating and cooling sections shall be used for the systems. The units shall be equipped with manufacturer’s automatics and a potential connection to the building BMS.

10.7.5.2. Requirements for air processing units (AHU):

10.7.5.2.1. They shall comply with the legal acts, standards, certificates and other requirements of inspections and certifications by competent, independent third parties:

10.7.5.2.1.1. European Commission Regulation No. 1253/2014 with regard to ecodesign requirements for ventilation units (ErP).

10.7.5.2.1.2. Eurovent certificate.

10.7.5.2.1.3. Certified software for unit configuration and selection.

10.7.5.2.2. Fire security requirements:

10.7.5.2.2.1. The casing heat and sound insulation - of fireproof material with non-toxic combustion properties.

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10.7.5.2.2.2. Fire class of the casing heat and sound insulation A1 in line with EN13501.

10.7.5.2.3. Structure, mechanical and thermo-dynamic properties of the casing:

10.7.5.2.3.1. Frame structure to fasten panels and other elements of the casing.

10.7.5.2.3.2. Mechanical strength class D2 or higher.

10.7.5.2.3.3. Inner surface of the casing - smooth without any extensions, screws, apertures, gaps etc. unevenness where mechanical and biological contamination may amass.

10.7.5.2.3.4. Door closers, hinges, handle fasteners etc. shall be placed off limits of the airflow, mounted on the outer surface of the units.

10.7.5.2.3.5. The heat and sound insulation of the casing - 50mm or more.

10.7.5.2.3.6. Air permeability (density) class of the casing - L2 or higher.

10.7.5.2.3.7. Thermal insulation class of the casing - T2 or higher for units serving the ice hall; the others - T3 or higher.

10.7.5.2.3.8. Thermal bridge class of the casing - TB2 or higher for units serving the ice hall; the others - TB3 or higher.

10.7.5.2.3.9. The units shall be mounted on an industrially manufactured support frame min 80mm, in order to enable adjustment of the needed floor level of the unit, connection of condensate drainage syphons and performance of the required maintenance, cleaning and technical servicing.

10.7.5.2.4. Ventilators, ventilator electric engines and sections thereof:

10.7.5.2.4.1. productivity control technology with EC commutation standard dimensions up to 5kW; for the other - single-speed with a frequency transformer unless EC commutation control is not available.

10.7.5.2.4.2. Backward curved centrifugal ventilators.

10.7.5.2.4.3. Direct drive shaft ventilation fan.

10.7.5.2.4.4. Material - high durability composite or metal with pre-painted coating.

10.7.5.2.4.5. Electric capacity reserve at the ventilator operating point - 10%.

10.7.5.2.4.6. The electric engines of the ventilation fans are industrially pre-equipped with maximum temperature sensors.

10.7.5.2.4.7. The ventilator section is equipped with an industrially pre-mounted on the outer surface circular capillary and outlets to connect pressure meters for the pressure created by the fan.

10.7.5.2.4.8. The ventilator section is industrially pre-equipped with security lock against accidental door closure.

10.7.5.2.4.9. Equipped with service security switch that is industrially installed and mounted on the outer surface of the casing.

10.7.5.2.5. Cooling sections:

10.7.5.2.5.1. Interlamellar spacing min 2.5mm.

10.7.5.2.5.2. Stainless steel condensate drain pan under the cooling section with gradient in the direction of draining.

10.7.5.2.5.3. Material for pipes - copper (Cu); for lamellae - aluminium (Al).

10.7.5.2.5.4. Pressure class up to 16 bar.

10.7.5.2.5.5. Industrially manufactured spray separator if required.

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10.7.5.2.5.6. Convenient access from both sides to conduct technical servicing and cleaning by the use of the technical and cleaning sections.

10.7.5.2.6. Heating sections:

10.7.5.2.6.1. Interlamellar spacing min 2.0 mm.

10.7.5.2.6.2. Material for pipes - copper (Cu); for lamellae - aluminium (Al).

10.7.5.2.6.3. Pressure class up to 16 bar.

10.7.5.2.6.4. Specialised port to mount an antifrost capillary shall be provides for.

10.7.5.2.6.5. Convenient access from both sides to conduct technical servicing and cleaning by the use of the technical and cleaning sections.

10.7.5.2.7. Filter sections:

10.7.5.2.7.1. Filter area minimum 10m2 per 1m2 of the inner cross-sectional area.

10.7.5.2.7.2. Filter capacity G1 to G4 – minimum100 Pa, F5 to F9 – minimum150 Pa.

10.7.5.2.7.3. Packing material - concealed cells, hydrophobic

10.7.5.2.7.4. On the outer surface of the unit casing, each filter shall have a differential pressure manometer installed to visually measure the filter contamination level.

10.7.5.2.7.5. The section shall be equipped with industrially mounted manometer tube connections.

10.7.5.2.8. A rotary heat recovery regenerator:

10.7.5.2.8.1. Interlamellar spacing min 2 mm.

10.7.5.2.8.2. Convenient access from both sides to conduct technical servicing and cleaning by the use of the technical and cleaning sections.

10.7.5.2.8.3. Heat recovery efficiency minimum 78%.

10.7.5.2.8.4. Pressure drop shall depend on the air volume and operating hours count.

10.7.5.2.9. A fixed-plate heat recovery regenerator:

10.7.5.2.9.1. Interlamellar spacing min 2 mm.

10.7.5.2.9.2. Convenient access from both sides to conduct technical servicing and cleaning by the use of the technical and cleaning sections.

10.7.5.2.9.3. Heat recovery efficiency minimum 75%.

10.7.5.2.9.4. Bypass valve function to ensure free cooling in summer and defrost function by preserving the air volume in winter.

10.7.5.2.9.5. Pressure drop shall depend on the air volume and operating hours count.

10.7.5.2.9.6. For the unit servicing the rooms with increased humidity level, the suction part shall have anti corrosion coating.

10.7.5.2.9.7. Stainless steel condensate drain pan under the heat exchanger with gradient in the direction of draining.

10.7.5.2.10. Run-around heat recovery element:

10.7.5.2.10.1. Interlamellar spacing min 2 mm.

10.7.5.2.10.2. Convenient access from both sides to conduct technical servicing and cleaning by the use of the technical and cleaning sections.

10.7.5.2.10.3. Heat recovery efficiency minimum 68%.30

10.7.5.2.10.4. Pressure drop and hydraulic resistance shall depend on the air volume and operating hours count.

10.7.5.2.10.5. Stainless steel condensate drain pan under the heat exchanger with gradient in the direction of draining.

10.7.5.2.11. Air duct block valves:

Maximum untightness 100dm3/m2 at 500Pa

10.7.5.2.12. Flexible air duct connections:

10.7.5.2.12.1. Industrially manufactured and supplied in the unit assemblage.

10.7.5.2.12.2. Heat insulation in the part of replacement air inlet and discharge.

10.7.5.2.12.3. Equipped with connection gaskets.

10.7.5.2.13. Technical servicing and cleaning sections:

10.7.5.2.13.1. Shall be provided before and behind the functional element of the unit (cooling section, heating section, heat recovery element).

10.7.5.2.13.2. Minimum length 400mm.

10.7.5.2.13.3. Minimum swinging door width 320mm.

10.7.5.3. Air inlet and discharge cuts shall be provided in such manner that the contamination impact of the discharge air and replacement air onto the inlet air quality.

10.7.5.4. Air exchange volume indoors shall be calculated in line with the regulations and the following parameters:

Offices (Category B) 2.52m3/m2

Toilet facilities 75m3/h per shower and 50m3/h per toilet bowl

Team dressing-rooms In order to ensure increased comfort levels in the team dressing-rooms, air replacement in the room shall be provided at least 4x per hour during games and practice.

Ice Hall In line with the technological requirements. Absolute air humidity maximum 4g/kg

Coffee-shop/ canteen/ kitchen area In line with the regulations and the technological task

10.7.5.5. Air processing units shall be equipped with frame and vibroinsulators.10.7.5.6. In the public toilet facilities, a separate draft ventilation system shall be provided

for.10.7.5.7. Control valves shall be provided on the air duct branches.10.7.5.8. In the rooms where negative air balance is required, overflow is ensured by a

10mm gap beneath the door; if it is not sufficient, an overflow grill shall be provided in the door.

10.7.5.9. On the main air ducts, access and cleaning holes shall be provided for. The holes shall be mounted in line with LVS EN 12097:2007 “Building ventilation. Air ducts. Air duct system maintenance convenience requirements for air duct components

10.7.5.10. All metal parts of the equipment likely to become energized shall be earthed according to the existing regulation.

10.7.5.11. When designing the air ducts, the air flow speeds shall be assumed to prevent air ducts and control valves from creating additional noise, to enable adjusting the system in line with the designed air volumes.

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10.7.5.12. Individual microclimate control options shall be provided in certain room blocks. Adjustment shall be integrated in the building BMS. The list of rooms requiring individual microclimate control shall be agreed with the Contracting authority.

10.7.5.13. For each Ice Hall an individual temperature and humidity control shall be provided for by the means of ventilation system. The ventilation systems shall have air drying by adsorption. The principal scheme shall be elaborated based on the data in the MBP description. Absolute air humidity maximum 4g/kg

10.7.5.14. The number of the needed PN systems and the areas to be served thereby shall be specified during the construction plan development.

10.7.6. Fire safety measures in ventilation and heating systems

Fire security measures in the ventilation and heating systems shall be designed in accordance with the requirements of LBN 201-15 “Fire safety in buildings” and LBN 231-15 “Heating and ventilation for residential and public buildings”.

10.7.6.1. Mechanic smoke drain From hallways; From certain rooms;

10.7.6.2. Replacement air compensation Natural with automatically opened windows; Mechanical with afflux ventilation units in rooms without openable windows.

10.7.6.3. In places where heating, cooling pipes and ventilation air ducts cross building structures with fixed fire stability limit, any holes and gaps shall be filled with hermetics of the respective fire stability properties.

10.7.6.4. The gaps between the fireproof obstacle and fireproof valve shall be filled with non-combustible hermetics of relevant fire-stability properties.

10.7.6.5. In air ducts of the ventilation system, where the air ducts cross building structures (intermediate floors, fir proof walls and partitions) with fixed fire resistance limit, automatic fire proof gates of relevant fire stability properties shall be mounted.

10.7.6.6. Transit air ducts shall be insulated with fire-proof rock-wool insulation in line with the manufacturer’s technical regulations providing fire stability limit at least EI 60.

10.7.6.7. Lock-out of the ventilation units in case of fire alarm shall be provided for.

10.8. POWER SUPPLY (ELT, EL)

To elaborate this part of the Construction plan in accordance with the effective legal acts of the Republic of Latvia (law, regulations, standards), technical regulations issued by the state and local authorities and any special regulations therein.

10.8.1. EXTERNAL NETWORK OF POWER-SUPPLY (SAT)

10.8.1.1. The part of the construction plan “External power supply networks (ELT)” shall be designed in a separate volume in line with the technical regulations issued by AS “Sadales tīkls”.

10.8.1.2. Two independent inlets from separate transformer substations shall be provided in the building.

10.8.1.3. For the building, power supply from an alternative power source shall be provided: diesel generator or UPS with accumulator. For the diesel generator, a space shall be provided to place/connect it if required.

10.8.1.4. A commutator shall be provided for, and the power switchgears requiring power supply in case of power black-out shall be separated.

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10.8.1. Power supply Internal networks (EL)

The power supply design shall be developed in line with the solutions of the AR part of the Construction plan and other engineering parts, and the design order, as well as considering the effective Latvian building regulations and other normative acts and technical or special provisions, including:

10.8.1.1. The design shall provide for construction of internal power network, as well as for guaranteed feed of external power network. The technical design of the internal and external power supply shall be developed based on the architectural and engineering tasks, and on the Contracting authority’s technical task.

10.8.1.2. Electric power supply strategy - cable lines shall be provided from the Main switchgear till the group switchgears per floor where power networks are to be connected - El Consumers, separately lighting, separately UPS sockets.

10.8.1.3. On each floor and for each ice rink hall, at least one electric switchgear with guaranteed power supply shall be installed.

10.8.1.4. For the required workplaces, separate sockets from the “regular inlet” shall be provided, and a reserved one wherein e.g., a computer system block may be connected to retain the needed data in case of power cut-off.

10.8.1.5. Calculation of monthly electric loads (winter/ summer) shall be performed for all designed systems individually and jointly. The techno-economically advantageous solution of connection shall be selected.

10.8.1.6. The design shall include the following power supply parts:

Medium voltage electrical installations (switching units, transformer substations, medium voltage cable lines);

Power supply mains (cable ladder system, cable canals, switchgears and risers);

Power supply networks (sockets, outlets, connections to electric devices etc.);

power supply lighting networks (switches, sensors, presence sensors, dimmers, lamps);

Lighting protection system and grounding system;

External power networks - backup power supply and .... kV network reconstruction or construction.

10.8.2. Cable lines

The main networks may be performed by the means of busbar bridge or construction of separate cable lines from the main switchgear of the building.

10.8.2.1. The cable lines shall be installed on cable grooves covered with cover plates and screwed seal to prevent unauthorised access;

10.8.2.2. The electric network cables of the building - leads to sockets, outputs, connections to electrical installations shall be concealed in the structures, walls of the building.

10.8.2.3. Electric leads to socket cable canals shall be non-concealed in the vertical cable canals.

10.8.2.4. On the roof, UV resistant protective tubes shall be used.33

10.8.2.5. In the technical rooms, cable may be laid openly on the cable ladders; in the other areas - they shall be laid in installation tubes.

10.8.3. Electricity control metering

10.8.3.1. Control metering of the consumed electricity shall be provided separately for each ice rink and team dressing-room area, coffee-shop, ...., as well as for functionally parted more capacious power consumers (chillers, ventilation units, lifts, compressors etc.) and commercial areas.

10.8.3.2. For the electricity control metering, electronic meters shall be used with an option to transfer the readings therefrom to the VAS system.

10.8.3.3. For all the main switchgears, voltage quality control units shall be installed with an option to transfer the readings therefrom to the VAS system.

10.8.3.4. Reading of the control metering shall be provided in the VAS part of the design.

10.8.4. Electric switchgears

10.8.4.1. For each load category, a separate power supply switchgear shall be provided for. This shall be specified with the Contracting authority during construction plan development.

10.8.4.2. For each load category, a separate power supply switchgear shall be provided for. This shall be specified with the Contracting authority during construction plan development.

10.8.4.3. The design shall provide for separated switchgears for each floor for assignments:

Technological devices; Ventilation and cooling devices; Power electric networks; Guaranteed electric consumers and sockets; lighting; emergency and evacuation lighting.

10.8.6. Power factor compensation

The corrected power factor (cos ) shall be at least 0.93; in the main switchgear condenser batteries shall be installed.

10.8.7. Guaranteed electrical power supply

10.8.7.1. To provide increased levels of power supply safety for the power consumers in case of power black-out, a guaranteed power supply switchgear shall be provided in the building fed from two independent power sources: inlet and the diesel generator. The switchgear shall be equipped with a commutator.

10.8.7.2. The design shall provide for a commutator switching to the back-up inlet from TP and the diesel generator in case of emergency.

10.8.7.3. The back-up power supply shall be ensured for the following power consumers:

Emergency lighting of the building; Evacuation direction signs; Fire-fighting system of the building; Separate UPS unit is included in the ESS part; Access and security systems of the building; Telecommunication system of the building;

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Fire safety alarm systems of the building; Socket system in work premises at workplaces; Evacuation and emergency lighting shall be designed through battery blocks

built in the lamps.

10.8.8. Uninterruptible power supply (UPS) units

10.8.8.1. The Object shall have two uninterruptible power supply (UPS) units - the system that is connected in chain between the power supplier and consume UPS systems providing interrupted power supply to the consumers.

10.8.8.2. The UPS unit shall guarantee interrupted power supply to the connected thereto consumers for the required time period (10 min.).

10.8.8.3. Overall technical requirements for UPS units. UPS unit shall ensure the following operation regimes:

Normal operating regime in accordance with VFI-SS-111; Periodic capacity overload until ratio 5:1 t=20msec without Bypass

switching; Stability to network disorders; Reconnection to the power supply network; Maintenance mode; Parallel operating mode; Automatic battery capacity check when reconnecting to the network

with event record memory.

10.8.9. Backup power supply sources - backup power supply diesel generators

10.8.9.1. To increase the power supply safety, in case of need an option to install a diesel generator shall be provided for (a diesel generator is out of construction scope).

10.8.10. Socket system

10.8.10.1.Power and plug socket system shall include:

Plug sockets of general intent of the building; Plug sockets for computers at workplaces in the building; Plug sockets for computers at workplaces in the building from UPS;

Plug sockets for computers at workplaces in the building from UPS and grade III overvoltage protection;

Plug sockets in the building and direct connection to all low intensity current consumers;

Power supply for the building fire safety alarm system; Power supply for fire-fighting system of the building;

Power supply for the control switchgears of lifts and other technological units in the building

10.8.10.2. In the building, grounded plug sockets shall be used by the means of grounding system (TN-S). The following power supply groups of plug sockets shall be separated:

Separate - for computer power supply; Separate - for domestic appliances and plug sockets of general intent, as

well as plug sockets in the technical rooms; Floor boxes and connection columns with built-in sockets and low

intensity current systems - shall be provided in office areas with large spacing between furniture and wall, and in the meeting room etc. (to be specified in the design AR part).

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Placement of the plug sockets and installation height shall be specified

during installation (to be specified in the AR part).

10.8.11. Internal wiring

10.8.11.1. Execution of lamps, switches and plug sockets and other electrical installations shall be selected in line with the humidity and dust levels of the premises of installation.

10.8.11.2. The cables of the building power network, except for the technical rooms, shall be concealed in the building structures by providing the cable connections as close to the respective units as possible. Non-concealed wiring or use of wiring canals, tubes, ladders etc. shall be acceptable apart of the places indicated in the design documentation (to be specified in the AR part).

10.8.12. Electric lighting system

10.8.12.1. In the design, LED and luminescent lamps shall be used. Electric lighting system shall include:

Working lighting of the building (day and night); Standby lighting; Emergency lighting of the building; Building façade and territory lighting;

10.8.12.2. The lighting levels shall be selected in line with the LVS 12464-1 -2011 regulation. For the electric lighting, LED lamps shall be used in the entire building. The LED lamps shall be selected of colour “neutral white” 3300K-5300K or „daylight white” >5300K.

LX1. Reading, writing, data processing 5002. Meeting, conference rooms 500 The lighting shall have the

dimming system. 3. Costumer reception areas, front desks 3004. Ice Hall 1000 and

20005. Entrance hall 100 – 2006. Team dressing-room 1007. Dressing-rooms, rest areas 200 Covered in LH

specifications

10.8.12.3. Lamp types:

To be agreed with the Contracting authority by selecting the most efficient option providing the required lighting quality is ensured.

hallways; Office rooms;

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Dressing-rooms; Technical rooms; Hockey halls - ice rinks; Coffee-shop; Technical rooms

10.8.13. Lighting control

10.8.13.1. Centralised working lighting control shall be provided for public access areas(Hallways, entrance halls, staircases, lift anterooms, waiting rooms etc.) - from the VAS (BMS) room, by the means of pre-programmed lighting modes (maximum lighting mode during daytime and minimums mode at night), as well as the local control (sensors). At night-time - by the means of presence sensors.

10.8.13.2. Working lighting control in the technical hallways and rooms shall be performed by the means of presence sensors and VAS assistance.

10.8.13.3. Working lighting control in the management (office) rooms shall be provided locally by the means of concealed switches.

10.8.13.4. Working lighting control in the dressing-rooms shall be provided locally. The system shall ensure pre-programmed lighting modes in the room.

10.8.13.5. Working lighting control in the coffee-shop - the solution shall be elaborated during the design planning.

10.8.13.6. Working lighting control in the Ice Hall shall be performed by the means of the control system board in the room. The solution for Control from shall be elaborated during the design planning.

10.8.13.7. Working lighting control in the security rooms, VAS monitoring rooms, light and sound operator room shall only be provided locally by the means of concealed switched in the respective room.

10.8.13.8. Working lighting control in the WC areas and at the mirrors above sinks shall be provided by the means of presence sensors.

10.8.13.9. Height of the working lighting switches 0.9 – 1.1 m from clear floor level.

10.8.13.10. In the rooms where the number of lamps exceeds four grouped starting shall be provided for.

10.8.14. Indoor emergency lighting

10.8.14.1. Evacuation routes shall be lighted by the means of illuminated evacuation directional signs.

10.8.14.2. Centralised emergency lighting control in the public access area (halls, staircases, lift anterooms and hallways etc. public access areas) shall be provided manually from the security room and automatically through BMS.

10.8.14.3. Emergency lighting control in the security guard’s room shall be provided locally by the means of switches in the respective room.

10.8.15. Special, decorative lighting

10.8.15.1. For the special, decorative lighting of the building, power supply outputs shall be provided. The decorative lighting of the building includes

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illumination of the directional and location signs, and the façade decorative illumination.

10.8.15.2. The decorative illumination shall be designed with options or various modes in relation with the seasons, daytime, standby lighting, festive lighting, and it shall be controlled from the VAS (BMS) room by the means of pre-programmed lighting mode scenario.

10.8.16. Grounding and potential levelling

To level the building potentials, provide protective grounding of electrical installations and earthing for the lighting protection, a single grounding loop shall be provided for - 40x4 earthing tape which shall be formed of horizontal and vertical grounding elements based on measurements. The earthing resistance of the building shall be maximum 4 ohms.

10.8.17. Lighting protection

The building requires class III lighting protection system in line with the requirements of LBN and LVS EN regulations.

10.8.18. Overvoltage protection

In the building, grade ... overvoltage protection shall be provided for. In the main switchgears of the building, on 0.4 kV inlets, for certain critical electric installations, grade ... overvoltage protection devices shall be installed. – the solutions shall be specified during the design planning.

10.9. WEAK CURRENT SYSTEMS (VS)

To elaborate this part of the Construction plan in accordance with the effective legal acts of the Republic of Latvia (law, regulations, standards), technical regulations issued by the state and local authorities and any special regulations therein.

10.9.1. The weak current and security system cable network shall be placed on weak current cable ladders for this purpose (separately from the power network cables).

10.9.2. When elaborating location of the cable ladders, application thereof shall be indicated, and the required number and dimensions shall be calculated. It shall be considered that on those ladders the weak current network cables are to be laid (phone, computer, optical fibre, conversational terminals etc.) as well as the security network cables (access control, video surveillance, security alarm); and on the ladders free space shall be provided for fire alarm and fire messaging system cables (the location shall be specified by the Designer).

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10.9.3. External electronic communication networks

10.9.3.1. In the main weak current room (data centre), the building switchboards and active unit placement cabinets shall be installed. The switchboards shall be earthed in line with the equipment and unit manufacturers’ recommendations by connecting those to the potential levelling busbar. The busbar shall be provided in the EL part of the design.

10.9.3.2. The data centre shall comply with the following parameters:

Minimum air temperature + 18°C

Maximum air temperature + 25°C

Minimum relative air humidity 30%

Maximum relative air humidity 60%

Calculation parameters +22°C RH 50%

10.9.3.3. The external networks shall be designed in line with the technical regulations issued by SIA “Lattelecom”. Inlet of the communication systems shall be provided from the .... side - to be specified during the construction plan development. To be detailed during the design planning. The solution shall be agreed with the Contracting authority.

10.9.3.4. While elaborating the design, the previously built electronic communication networks shall be considered.

10.10. ELECTRONIC COMMUNICATIONS SYSTEMS (ESS)

10.10.1. Phone and data network

Connection of the building to the external networks of the telecommunication operators shall be elaborated at the stage of the Technical design in line with the technical regulations issued by the operators and the Contracting authority’s instructions. In the building, telecommunication services shall be provided from at least two operators, e.g., SIA ”LATTELECOM” and AS ”LMT”.

In the building to be designed, extension of the existing IP PBX from the Central stand shall be provided for.

10.10.2. Computer network telecommunications network

In elaborating the design part, the effective regulations and standards shall be observed. The computer network materials and the developed network shall comply with ISO standards.

A server room for ... (server pillars) spots shall be provided for to comply with generally accepted IT security standards.

The active network units (i.e., phones, computers, mice, keyboards, displays, TV sets, projectors) shall be provided by the Contracting authority.

For the main network, 4-strand optical fibre cable shall be used.10.10.2.1. Central commutators.

The existing optical commutator stack needs to be widened by preserving full functionality: - reserving commutators in the stack; - stack control by the means of one address; - joining commutators by the means of the selected modules and high-speed cables without occupying the commutator principal ports.

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The widening shall be only acceptable by adding a new commutator to the existing stack.The main requirements for the central commutators.

Parameters Minimum requirementsGeneral requirements

• Rack mount 19”• Maximum height 44mm• Maximum width 440 mm• Maximum depth 350 mm• Operating temperature range - at least 0o – 45o

• Electric feed 220-240V AC, 50HzPerformance per commutator

• Frame rate – at least 95 million pps • Switching capacity – at least 128 Gbps• Routing table size – at least 256 records (IPv4) and 128 records

(IPv6) • MAC address table size – at least 16000 records• VLAN count - 4000

Ports per commutator

• At least 22 10/100/1000 SFP port count • At least 2 10/100/1000 SFP Combo ports• At least 2 x 10 Gbps SFP+ port count

Commutator stack requirements

• Maximum number of stack merge - at least 8 commutators• Speed between two stack commutators - at least 20Gb/s• Stack cable length - at least 3m

Standard and protocol supportDevice management

• RFC 1157 SNMP v1/v2c• RFC 2819 (RMON groups Alarm, Event, History, and Statistics

only)• RFC 1305 NTPv3 • SNMPv3 and RMON RFC support• RFC 2573 (SNMPv3 Applications)• RFC 3416 (SNMP Protocol Operations v2)• Multiple Configuration Files• SSHv1/SSHv2 Secure Shell• HTM Land Telnet management• TACACS/TACACS+ Web UI

General protocols• IEEE 802.1ad Q-in-Q• RFC 791 IP• RFC 2668 Definitions of Managed Objects for IEEE802.3 Medium

Attachment Units (MAUs)• IEEE 802.1D • RFC 792 ICMP • IEEE 802.1p Priority• RFC 793 TCP • IEEE 802.1Q VLANs• RFC 826 ARP• RFC 2865 Remote Authentication Dial In User Service (RADIUS)• IEEE 802.1s Multiple Spanning Trees• RFC 854 TELNET • IEEE 802.1w Rapid Reconfiguration of Spanning Tree• RFC 951 BOOTP• RFC 2866 RADIUS Accounting • RFC 1213 Management Information Base for Network Management

of TCP/IP-based Internet• RFC 3414 User-based Security Model (USM) for version 3 of the

Simple Network Management Protocol (SNMPv3)

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• IEEE 802.1X PAE • IEEE 802.3 Type 10BASE-T • IEEE 802.3ab 1000BASE-T• RFC 1305 NTPv3• RFC 3415 View-based Access Control Model (VACM) for the

Simple Network Management Protocol (SNMP)• IEEE 802.3ad Link Aggregation Control Protocol (LACP)• RFC 1350 TFTP Protocol (revision2) • RFC 1519 CIDR• IEEE 802.3ae 10-Gigabit Ethernet• RFC 1812 IPv4 Routing

RFC 3418Management Information Base (MIB) for the Simple Network Management Protocol(SNMP)

• IEEE 802.3i 10BASE-T• RFC 2131 DHCP• IEEE 802.3u 100BASE-X• RFC 2236 IGMP Snooping• IEEE 802.3x Flow Control• RFC 2616 HTTP Compatibilityv1.1 Mechanisms• IEEE 802.3z 1000BASE-X• RFC 2665 Definitions of Managed Objects for the Ethernet – like

Interface Types• RFC 768 UDP

Network management• RFC 2819 four groups of RMON:

ANSI/TIA-1057 LLDP Media Endpoint Protocol(LLDP) 1(statistics), 2(history), 3(alarm), and Discovery(LLDP-MED) 9(events) SNMPv1/v2c/v3Security

• IEEE 802.1 X Port-based Network• RFC 2139 RADIUS Accounting• Secure Sockets Layer (SSL)• Access Control• RFC 2865 RADIUS (client only)• SSHv2 Secure Shell• RFC 2866 RADIUS Accounting• RFC 2138 RADIUS Authentication

The commutators shall be stackable with a duplicating power supply (1+1). Protocol “Dying Gasp” shall be supported. In case of power supply outage for the commutator, it has enough power to send notifications on the damage before it switches off. SNMP trap, syslog and Link OAM PDUs notifications shall be generated.

10.10.2.2. Access commutatorsRequirements for the access commutators:Commuting802.3ad (LACP) - port grouping in trunks that work as a single connection. Ensures aggregation of all port speeds hence providing high speed connections among the commutators or between a commutator and the server.802.1d, 802.1w, 802.1s (Spanning Tree Protocol (STP), Rapid Spanning Tree (RSTP), Multiple Spanning Tree (MSTP)) - OSI 2nd level backup protocols providing data resend through a backup connection if the main connection is damaged.Possibility to create at least 4000 802.1q virtual networks (VLAN).

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Multicast snooping protocols (IGMP v1, v2 and v3) shall be supported - Multicast is required in cases when single type data flows need to be delivered to the user, e.g., video streaming. Hence instead of N x data flows only one data flow is sent significantly relieving the network units.The commutators shall be connected in a fault tolerant stack to be controlled as a single logic network device; in case of failure of the main control device, shifting to the backup stack control device shall occur automatically without reload of the stack.

Management

The generally known computer network management protocols shall be supported: CLI, Telnet, Http, Https, SSL, SNMP v1, SNMPv2c, SNMP v3, TFTP, Radius, Tacacs+, RMON , BOOTP, TFTP.Port mirroring shall be supported to ensure an option to “copy” data flows from 1 or more ports and transmit to 1 monitoring port. Is to be applied for the purposes of diagnostics, security and others.Control from a centralised management system shall be feasible - the commutators must be fully integrated with the network access control system so that the network access control system be able to fully realise all its functions including detection of users and network devices, authentication, authorisation and assessment at each access commutator port.Each access commutator or access commutator stack on the central commutators shall be connected with two optical interfaces 1G SFP, linked in a group (MLT trunk) acting like a single connection.

Parameters Minimum requirementsGeneral requirements

• Rack mount 19”• Maximum height 44mm• Maximum width 440 mm• Maximum depth 350 mm• Operating temperature range - at least 0o – 45o

• Electric feed 220-240V AC, 50HzPerformance per commutator

• Frame rate – at least 40 million pps • Switching capacity – at least 50 Gbps• MAC address table size – at least 16000 records• VLAN count - 4000

Ports per commutator

• At least 24 10/100/1000 BaseT RJ-45 port count. • At least 4 SFP Gigabit port• At least 2 x 5 Gbps stack port

Commutator stack requirements

• Maximum number of stack merge - at least 4 commutators• Stack cable length - at least 3m

Standard and protocol supportDevice management• RFC 854/855 Telnet and Telnet options• RFC 959/2640 FTP• RFC 1155/2578-2580 SMI v1 and SMI v2• RFC 1157/2271 SNMP• RFC 1350 TFTP Protocol• RFC 1573/2233/2863 Private Interface MIB• RFC 1643/2665 Ethernet MIB• RFC 1901-1908/3416-3418 SNMP v2c• RFC 2096 IP MIB• RFC 2131 DHCP Server/Client• RFC 2570-2576/3411-3415 SNMP v3• RFC3414 User-based Security Model

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• RFC 2616 /2854 HTTP and HTML• RFC 2667 IP Tunneling MIB• RFC 2668/3636 IEEE 802.3 MAU MIB• RFC 2674 VLAN MIB• RFC 2818 HTTPS over SSL• RFC 4251 Secure Shell Protocol Architecture• RFC 4252 The Secure Shell (SSH v2) Authentication Protocol

Security• RFC 1321 MD5• RFC 2104 HMAC Message Authentication• RFC 2138/2865/2868/3575/2618 RADIUS• Authentication and Client MIB• RFC 2139/2866/2867/2620 RADIUS• Accounting and Client MIB• RFC 2228 FTP Security Extensions step• RFC 2284 PPP EAP• RFC 2869/3579 Radius Extension

General protocols• IEEE 802.1D (STP)• IEEE 802.1p (CoS)• IEEE 802.1Q (VLANs)• IEEE 802.1s (MSTP)• IEEE 802.1w (RSTP)• IEEE 802.1X (Port Based Network Access Protocol)• IEEE 802.3i (10Base-T)• IEEE 802.3u (Fast Ethernet)• IEEE 802.3x (Flow Control)• IEEE 802.3z (Gigabit Ethernet)• IEEE 802.3ab (1000Base-T)• IEEE 802.3ac (VLAN Tagging)• IEEE 802.3ad (Link Aggregation)• IEEE 802.3af (Power-over-Ethernet)• IEEE 802.3at (Power-over-Ethernet)• IEEE 802.3az (Energy Efficient Ethernet)• RFC 1112 IGMP v1• RFC 2236/2933 IGMP v2 and MIB• RFC 2365 Multicast

10.10.2.3. Wireless solution WiFiA new wireless network controller shall be installed as the backup controller for the existing controller.The new controller shall be fully compatible with the existing WiFi network equipment.Minimum requirements for the controller:

- supports up to 500 base stations; - simultaneously supports100 wireless networks;

- up to 3000 WiFi users; - supports High availability cluster (HA).

The manufacturer’s support for the existing and the new controllers for three years shall be included in the price.Management A centrally administered solution shall be supported - the wireless infrastructure shall be controlled from a single centralised management system regardless the count of the wireless access sites and controllers. It shall work jointly with the network access control. The controller shall provide at least 1+1 reservation without reducing functionality of the wireless infrastructure.

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10.10.2.4. Wireless access sites AP

Functionality• IEEE 802.11a/b/g/n/ac Wave 2• 802.11ac: 6.5 to 867 Mbps (MCS0 to MCS9, NSS=1to2 for VHT20/40/80 • 802.11n: 6.5 Mbps to 300Mbps (MCS0 to MCS15) • 802.11a/g: 54, 48, 36, 24, 18, 12, 9, 6Mbps • 802.11b: 11, 5.5, 2 and 1 Mbps• 2.4GHz: 1-13 • 5GHz: 36-64, 100-144, 149-165• 2x2 SU-MIMO • 2x2 MU-MIMO• 20, 40, 80MHz• WPA-PSK, WPA-TKIP, WPA2 AES, 802.11i, Dynamic PSK

WIPS/WIDS• WMM, Power Save, Tx Beamforming, LDPC, STBC, 802.11r/k/v • Hotspot, Hotspot 2.0 • Captive Portal• WISPr

SecurityEncryption shall be ensured for communication with the controller.The following protocols shall be supported: WEP, WPA (TKIP), WPA2 (AES), 802.11i, 802.1X. Customer access control methods. The system ensures equal batch number for each device. The system ensures equal access time for each device depending on the radio connection speed (in the environment where devices of both a/b/g and n standard work, provides the n standard devices with an option to work with high data transmit speeds).

RF qualityDynamic channel choice in case of RF noise or congestion. Optimises distribution of customers in 2.4GHz and 5GHz radio wave bands, e.g., a customer supporting 5GHz , will be directed to work on a/n band. To level the loads and coordinate the bands, even distribution of clients shall be provided both within a single AP and among several APs. An option to define priority frequency channels shall be available. An option to define the associated users count in each radio band for each AP shall be available.AP shall continuously monitor the load of radio channels, signal/noise level and the load of the adjacent APs.

10.10.2.5. Network management system (NMS)Delivery of a new network management system shall be provided for.The network management system shall be fully compatible with the existing commutators and WiFi base stations.

Unit executionThe system may have both virtual and physical execution. Client - server architecture It shall support simultaneous access of up to 5 clients (administrators). Web based interface.The unit performance shall be sufficient to operate all the intended control functions.Management of all the network devices shall be ensured (commutators, WiFi solution).NMS shall ensure:- Management of at least 100 network units (apart from AP);

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- Management of at least 2 installed wireless controllers;

Main functions The system shall ensure:Graphic depiction of network topology;Management and audit of the network units;Development and maintenance of the network access profiles;Management of the network access control system Network User Profiles and monitoring of the users’ activity;Management of the security events;Management of virtualized data centres;Processing of events and alarm notifications;Searching and monitoring of network elements;Generating reports on the network activity and loads;Collecting statistics of the network operation.

Commutator management functionalityShall ensure control and audit of commutators including:- Centralised placement of FirmWare on the commutators;- FirmWare version control;- Archiving the configuration files;- Management of commutator configuration changes;- Control of the free and occupied ports of the commutator.

It shall ensure real time monitoring and graphic depiction of the network units, including:- physical location of commutators;- VLAN topology;- Spanning Tree topology.It shall ensure automatic search and depiction of the network units.

It shall ensure information about the users:- What users and devices are authenticated themselves;- Where the authenticated users and devices are located (connected to which commutator port);- Centralised creation of profiles;- Attribution of profiles to a user, device or a group thereof;- Selection of the authentication type (IEEE 802.1x, MAC, Web based) and attribution to a user, device or a group thereof;- linking a RADIUS server to a device

Control of events and alarm notifications- Generating reports on the events;- Real time depiction of alarm notifications;- Sending messages via email or equivalent methods

Security- Possibility to receive an alarm notification from the network security devices;- Possibility to close a port or restrict data flows in case of attack by applying a relevant profile

Configuration controlIt shall monitor the configuration changes performed from NMS, from other management systems or CLI. NMS shall ensure monitoring and depicting of the internal temperature, ventilation fan status and power supply state of the central and access commutators.

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NMS shall ensure VLAN management functionality, including creating, configuring and installing VLAN on several commutators or their port groups.NMS shall ensure: browser function of the Management Information Base (MIB) to enable reading SNMP MIB variables in network devices as well as to set the variables in the writable MIB objects.It shall support generation of reports of the commutator statistics.TPS ensures receiving and depicting of such statistics:List of device interfaces;Device CPU and memory load;Device accessibility report.

10.10.3. Video surveillance system (VS_VN)

10.10.3.1. For visual monitoring of the building hallways, camcorders are to be installed to ensure full video surveillance coverage of the public access areas.

10.10.3.2. Video surveillance units are to be provided in the ice rink halls.

10.10.3.3. Outdoors (at the building), camcorders are to be installed to ensure full video surveillance coverage of the outer perimeter.

10.10.3.4. In the building, IP (network) colour indoor and outdoor camcorders are to be installed. Location of camcorders shall be agreed with the Contracting authority.

10.10.3.5. The existing video surveillance system shall be extended.

Video surveillance servers (hereinafter referred to as MASTER servers) shall be delivered intended for the system control and archiving for minimum 3 months with minimum quality 2MP, 25Fps.

Servers (SLAVE servers) shall be delivered for emergencies when the MASTER server fails.

Such MASTER and SLAVE servers shall be selected that provide full compatibility with the existing MASTER and SLAVE servers. Namely, any SLAVE server - both the one to be designed and the existing - can take over from any MASTER server - both the one to be designed and the existing - until the MASTER server resumes normal operation. Furthermore, the video surveillance system shall ensure automatic video capture copying functionality from SLAVE server to MASTER server.

In each MASTER and SLAVE server, at least 2 connections shall be provided for the data transmit network.

Each MASTER and SLAVE server shall be connected to two central commutators of the data transmit network. In normal operating mode, the servers shall be capable to aggregate the resources of both connections. In case of emergency, the servers shall only use the operating connection. The given functionality shall be ensured automatically.

10.10.3.6. All the camcorders shall have power supply from PoE (Power over Ethernet) switches.

10.10.3.7. The workplace of a desk officer: a computer with a display to monitor the camcorder feed.

10.10.3.8. In the security room, servers for real time reviewing of the images shall be provided for. The real time image reviewing servers shall be assembled with the needed count of displays, remote controls.

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An option shall be ensured to render the video data on the displays in various combinations - 1, 4, 9, 16 camcorders on a single display.

An option shall be ensured to connect the existing camcorders to the to-be-designed servers to review video images in the real time mode.

An option shall be ensured to connect the to-be-designed camcorders to the existing servers to review video images in real time mode.

The solution shall be detailed during the design planning depending on the video surveillance solution proposed by the Designer.

10.10.3.9. Power supply for the video surveillance system shall be provided through the backup power supply to ensure protection against overvoltage as well correct operation of the video surveillance in case of power outage.

10.10.3.10. Video recording from the video surveillance shall be continuous.

10.10.3.11. The video surveillance system shall ensure the following options:

If required, to review the video footage archive without disturbing the system operation;

Maintenance of the video surveillance system (on the Contracting authority’s choice) - minimum 3 months;

Data transfer to other data carriers (CD, DVD etc.) with an option to read it in other computers;

Remote monitoring of the current situation in the building and review the footage archive;

Recording shall start when a camcorder motion sensor gets activated.

10.10.3.12. Requirements for camcorders Indoors - standard requirements

Outdoors - the installed camcorders shall be placed in protective casings (with consoles) to enable the camcorder operation within the temperature range -35°C to +50°C. The camcorder casings shall have moisture-resistance class IP65.

Outside the building day/night camcorders shall be used.

10.10.4. Access control system

10.10.4.1. Doors of all premises, except for the doors to be used behind certain access control door and have no exit to other rooms or have special application (auxiliary rooms, shower facilities, toilet facilities) - shall be equipped with access system (PK - the set also includes electromagnetic pegs or electromagnetic lock depending on the door type).

10.10.4.2. For the rooms not to be equipped with PK, mechanical locks shall be provided for.

10.10.4.3. It shall be provided that in case of emergency PKs switch-off and PK-equipped doors are in unlocked position. The switch-off system or access control system shall be provided with automatic fire detection and alarm system. The doors shall be equipped with simplex access control by using an exit button - switch for exiting.

10.10.4.4. The access control concept shall be specified with the Contracting authority at the stage of construction plan development.

10.10.4.5. The parking lot barrier shall be included into a single building access control system to enable their control with a single portable identifier (ID non-contact) cards to be used in the building.

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10.10.4.6. On the 1st floor of the building, conversational terminals shall be installed to be connected to the desk officer:

At the main entrance;

At the parking lot entrance barrier.

10.10.4.7. Access control shall be used for:

Team dressing-rooms; Work offices; Certain other rooms according to the Contracting authority's requirements.

10.10.4.8. The designed access control shall ensure an option to define access authorisation for each employee individually.

10.10.4.9. Access control shall provide for record keeping.

10.10.4.10. If required, the existing ticket system shall be extended.

10.10.5. Centralised security system

10.10.5.1. Modern integrated security system shall be provided in the building, where a single software integrates access control, security alarm, fire alarm, and video surveillance, furthermore, the system shall include an option to receive and transmit signals from other systems (BMS etc.). The security systems shall be integrated and connected to the existing security systems and software thereof. To extend the existing security and access control system, the single data transmit network of the existing building and to-be-designed building shall be used.

10.10.5.2. The security alarm shall be designed in such manner that it ensure transmit of the alarm signal to the monitoring desk (and the security room an the Central stands). At this desk, connection to the alarm button shall be ensured to be serviced by the security service provider so that a mobile crew arrive in case of alarm.

10.10.5.3. Security alarm shall be provided for the security of all rooms in the building.

10.10.5.4. The integrated security system shall link the security alarm system and the access control system. The system shall be module-based and easily extended.

10.10.5.5. The system shall operate as an address system and in case of alarm, a floor plan shall be shown on the display where the exact spot of the actuated alarm sensor is indicated, as well as the required information (site description, procedure instructions, contacts etc.).

The to-be-designed building shall have a new server installed with graphic interface.

The new graphic interface shall ensure monitoring and control of the security and access control systems both of the existing and to-be-designed buildings.

The existing graphic interface shall ensure monitoring and control of the security and access control systems both of the existing and to-be-designed buildings.

An option shall be provided to use both the existing and to-be-designed graphic interface to monitor and control the security and access control systems in to-be-designed and the existing buildings.

10.10.5.6. In case of alert, an option shall be ensured also to send a message upon the alarm situation via email or sms.

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10.10.5.7. It shall be provided for creating of a remote workstation by the means of the computer network to enable remote monitoring of the system state and control it if required.

10.10.5.8. The system shall ensure:

Registration of all events (alerts, system state, movement of individuals etc.) by retaining the information in the system database;

Archiving of information from the database in external memory devices (CD, DAT or others);

An option to print the needed information from the database;

Connection for at least 8 workstations;

System control both locally and remotely;

The system software shall be protected by access codes (passwords);

An option to segregate the system users (operators) in various priority levels.

10.10.5.9. Security alarm in the building premises, shall be provided by the following signal transmitters:

Motion sensors, glass break detectors and signal transmitters (door and window magnetic contacts);

Infra-red motion sensors (to be installed in all rooms of the building);

Glass break detectors (to be installed on the 1st floor);

Magnetic contacts on the doors;

Alarm buttons.

10.10.6. Automated voice messaging system

The Construction plan part shall be elaborated in line with the effective normative acts of the Republic of Latvia (law, regulations, standards).

10.10.6.1. In the building, a single alert messaging system shall be introduced the control devices of which are to be placed in the cabinet to be designed in the server room.

10.10.6.2. The design shall include a fire voice messaging system in line with the European standards.

10.10.6.3. The unit shall comply with the requirements of EN ISO:9001 so that the system may be extended further on if required.

10.10.6.4. The network areas shall be developed in such manner that no damage of one amplifier or loudspeaker chain may cause complete loss of coverage for the respective area.

10.10.6.5. The system unit shall ensure continuous performance control of the lines and system components and detection of defects.

10.10.6.6. Messaging system shall be activated by alert signals from the fire detection and alert systems.

10.10.6.7. The alert messaging system shall feature 100V with clarity factor 0.7 and minimum sound pressure 65dB. The alert module shall contain a messaging text in the Latvian, English, and Russian languages.

10.10.6.8. The messaging loudspeakers shall be installed in all the rooms and hallways in the building (in all the spots where humans may be present).

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10.10.6.9. The messaging system shall be activated automatically once the fire alarm goes off.

10.10.6.10.At the monitoring desk, a microphone system shall be installed with the area selection module to transmit the message.

10.10.6.11.Loudspeakers and other chains shall be installed by the means of fire-resistant cable (E30) to ensure operation for 30 minutes in case of fire.

10.10.6.12.Power supply for the control block shall be ensured from a separate electricity distribution group according to 3-strand scheme, backup =24V power supply - from UPS which guarantees normal operation of the system in the alert mode for at least 30 minutes (in line with LVS CEN/TS 2005L: 54-14 p.A 6.7.3 “Standby supply”).

10.10.6.13.The system shall comply with the LVS EN 60849 regulations.

10.10.6.14.The main functional requirements for the system:

To be agreed with the Contracting authority

10.10.6.15.The fire messaging system shall ensure such sequence of alert signals:1) Alarm sound;2) Alert voice message in the Latvian, English and Russian languages;3) Alarm sound.

10.10.6.16. The fire messaging system shall ensure sound signal between min. 65dB and 120 max.

10.10.6.17. The fire messaging system shall be switched on simultaneously with the alert signal received from the fire safety system. According to the Contracting authority’s suggestion, delay of the fire messaging system actuation may be acceptable for no longer than 3 minutes in order to prevent alert messaging in case of false alarm.

10.11. EQUIPMENT MANAGEMENT AUTOMATION SYSTEM (VAS)

The design shall be elaborated in accordance with the tasks issued for other engineering systems. The design shall include a simple use manual for the installed systems.

In the building, control and/or monitoring of the following systems shall be provided for:

Power supply, including power metering system (power rate, heat and cold metering);

Climate control system. Heat, ventilation, chiller and refrigeration control;

Lighting control;

Water supply and sewage control systems;

Ice laying system control;

Etc. system controls the necessity of which shall be specified during the construction plan detailing and agreed with the Contracting authority.

10.12. TECHNOLOGY PART (TN)

10.12.1. Ice Hall maintenance and laying technology and equipment

See the units to be used and the parameters thereof in Clause 10.7.3. (Refrigeration system, ice preparation) and 10.7.5 (Ventilation systems).

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Each ice rink shall be functioning separately and independently.

Ice ground heating shall be provided, PIR or PUR 120mm heat insulation and reinforced concrete flooring 120-140mm.

The side boards of the ice rinks shall be anchored in the concrete flooring.

10.12.2. Coffee-shop technology - semi-manufactured products - Preparation/ heating/ preservation technology

10.12.3. Lift/ elevator technology

10.12.4. Ice snow melting technology

10.12.5. Technology of the sauna room with an electric heater

10.12.6. Technology for the cloth drying room - description, operation instructions

10.12.7. List of the loose and fixed technological units and furniture

10.12.7.1. A list shall be made with the technological units, furniture and equipment indicating the relevant rooms. The list shall have an annex with visual proposals for furniture, equipment. Classification of the units and furniture (loose/fixed) shall be agreed with the Contracting authority.

10.12.7.2. Fixed technological units (e.g., generator, ice machine maintenance units, scoreboard, elevators etc.)

10.12.7.3. Loose technological units (e.g., office appliances, equipment for washing place, coffee-shop/ kitchen; skate sharpening unit, garment drying cabinets etc. equipment).

10.12.7.4. Loose items - sport equipment (e.g., work-out units, power lifting sectors etc.)

10.12.7.5. Fifed furniture (e.g., spectator seats in the stands)

10.12.7.6. Loose furniture pieces (e.g., tables, chairs, team dressing-rooms lockers, shelves, dressing-room lockers etc.).

10.12.7.7. Loose equipment (e.g., waste bins, towel hangers, hand dryers, mirrors, soap dispensers, shutters etc.).

10.12.7.8. Within the construction plan, floor plans with the layout of furniture and a description thereof shall be submitted to the Contracting authority. Only built-in furniture shall be constructed.The loose items (furniture and equipment) shall be purchased outside of this construction procurement.

10.13. DESIGN FOR WORK PERFORMANCE (DOP)

As developing the design for work performance, the effective building regulations of the Republic of Latvia and the requirements of the laws and regulations shall be observed.

10.13.1. DOP shall be developed for the entire volume of the construction works. Any other additional matters regarding the total territory shall be agreed with the Contracting authority.

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10.13.2. As developing DOP, it shall be considered that during the construction works, in July 2020, events of the School Youth Song and Dance Festival are scheduled in the Daugava Stadium, when the construction works are to be paused for a week.

10.13.3. As developing DOP, it shall be considered that in the territory of Daugava Stadium, sport events take place rather regularly, therefore the flow of construction transportation is to be organised to avoid any disturbances for the operation of Daugava Stadium.

10.13.4. Furthermore, DOP shall include: Overall situation summary; Description of the construction work organization; General terms for organization of construction works; Construction work technology describing in detail the performance technology for

hazardous works (work at height) and the weather conditions acceptable for such works;

Description and sequence of the main construction works; Volumes of the main construction works; Scheduled timetable and substantiation for the construction works; Description of preparing for the construction works, including preparation of the

construction site and security arrangements. Arrangement of stacks and stands for materials and tools; Arrangement of temporary engineering communications for the construction; Documents required for the construction to be held on the site; Occupational Safety plan; Work performance timetable

10.14. GUIDELINES FOR ENERGY PERFORMANCE

As developing the construction plan documentation, a separate part shall be provided for summary of the information classifying and exactly defining the substantial matters related to the energy performance of the building. In all the design solutions, the Designer shall maximally include the required technical solutions and applicable materials to ensure the needed energy performance indices of the building.

10.14.1. Volume and contents of the energy performance part of the design.

Content-wise, the energy performance part of the design shall include at least the following information:

Heat transfer factors of the limiting structures, the calculation of which shall be substantiated by the calculation methodology of the binding regulations;

Drawings of the construction assembly units; minimum scale 1:10; which represent in detail the applicable materials and their critical technical properties;

Detailed calculation of the energy audit for the heating and cooling period in line with the regulations.

10.14.2. The elements constituting energy performance of the building which should be evaluated in the design documentation:

Heat transfer indices of the limiting structures (floors, external walls roof/attic ceiling);

Thermo-dynamic values properties of the forming components (profile, glass packets, spacers) of the glass translucent structural elements (windows, street doors, façade system);

Air permeability indices of the limiting structures and the building; Thermal bridge analysis and the calculated value thereof; Risk assessment of water vapour condensation for the structural elements; Indoor microclimate parameters; Solar permeability of the limiting structures; thermal inertia indices;

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Technical indices of the ventilation and performance indices.

10.14.3. Requirements for energy audit of the building:

For energy audit of the building, it is recommended to use the calculation method of Passive House Institute (PHPP) and in line with the LVS EN ISO 13790 regulations or equivalent.

At the design stage, at least energy audit modelling calculation for the building shall be performed specifying various solutions for the limiting structures and engineering systems in order to estimate their impact onto the energy audit of the building.

10.14.4. Detail and volume of the assembly units in the design shall contain at least detailed drawings of the following assembly units:

Plinth unit; Outer wall unit; Window arrangement units - 3 points - sill, aperture lintel, side coupling; Outer wall/roof coupling unit; intermediate floor unit; Roofing unit; Assembly unit solutions shall be elaborated for all the specific spots of thermal

bridge formation; The unit drawings shall clearly and properly define the parameters and properties

of the applicable materials (heat insulation, seal tape, adhesive/sealing hermetic agents, principal structural material);

Requirements shall be defined for surface preparation before applying the sealing tapes or hermetic agents;

The applicable materials and their critical technical parameters shall be stated in detail.

10.14.5. The author supervision prospect for the construction plan implementation shall include a separate section for supervision of all the matters related to the energy performance of the building; it shall indicate requirements for the control over the works affecting the energy performance of the building in order to comply with the construction plan and the requirements of the Contracting authority, Construction Law, and other laws and regulations.

10.14.6. Energy performance calculation and elaboration of the temporary energy performance certificate

10.14.6.1. The Contractor shall perform energy performance calculations regarding the compliance of the proposed solutions with the temporary energy performance certificate submitted within MBP. Additionally, if the solutions provided in the existing energy audit or preliminary construction plan are changed, the Contractor shall redo the temporary energy performance certificate of the building.

10.14.6.2. Energy performance calculations and the temporary energy performance certificate of the building shall be performed by a certified energy auditor and shall be submitted to the Contracting authority for reviewing.

10.14.6.3. Prior to completing the works, the Contractor shall perform air tightness tests of the building (Blower Door) in order to provide the air tightness of the following threshold:

10.14.6.4. For the building parts with natural ventilation (aeration) - q50 ≤ 3 m3/(m2 × h);

10.14.6.5. For the building parts with mechanical ventilation system - q50 ≤ 2 m3/(m2 × h);

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10.14.6.6. For the building parts with mechanical ventilation system equipped with heat recovery (air recuperation) devices - q50≤ 1,5 m3/(m2 × h).

10.15. ECONOMIC PART (BA, T)

10.15.1. When indicating materials, units, technical equipment, summary of their technical properties shall be provided.

10.15.2. If any indication of materials, units, technical equipment specifies the origin, particular process, label, patent or specific type of goods, then is shall be completed with a reference “or equivalent”. In such case, the designer shall indicate criteria (parameters) to use for evaluation of the said equivalence;

10.15.3. In certain estimates, equipment and furniture shall be highlighted - fixed furniture. Classification of the furniture shall be agreed with the Contracting authority (see above in the Clause of the technical specifications “List of the loose and fixed technological units and furniture”).

10.15.4. In certain estimates, technologies - fixed. Classification of the furniture shall be agreed with the Contracting authority (see above in the Clause of the technical specifications “List of the loose and fixed technological units and furniture”).

10.16. MAIN CONDITIONS FOR THE BUILDING OPERATION - SPECIAL MEASURES AT THE OPERATION STAGE OF THE BUILDING

The Contracting authority shall accept that the construction plan part “Main conditions for the building operation” are elaborated during the construction plan development, when they shall be submitted to the Contracting authority for review, yet the final version thereof shall be completed during the Construction works and shall be submitted to the Contracting authority before putting the object into operation.

10.16.1. The main operation conditions shall be elaborated for the following systems: Water-supply and sewage; Heat-supply (ST) and thermal engineering; Heating; Ventilation; Air-conditioning, refrigeration; Power supply; Fire safety measures; Security alarm, access control; Video surveillance system; Control and automating systems; Lift

10.16.2. The main operation conditions for the building shall be presented in a table:

System Unit denomination

Unit grade Location of the unit

Description of unit operation

Main conditions for operation and maintenance

Example: UKEL

10.16.3. Complex calculation of the annual operational costs for the building shall be elaborated by presenting the potential monthly costs

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11.

SPECIAL REQUIREMENTS FOR CONSTRUCTION PLAN DEVELOPMENT

11.1. The construction plan shall be developed in such manner that the total construction costs (ice halls, construction of territory commodities and passage of the external engineering communications) do not exceed the available (granted and approved) funding, i.e., EUR 10’555’000.00. If during design planning, while elaborating the techno-economical grounds for the design solutions, the Designer as a professional of the respective sector suspects that the construction costs of the Construction plan implementation will exceed the available funding, the Designer shall promptly notify the Contracting authority thereof and offer solutions to reduce the costs.

11.2. The Construction shall comprise all detailed drawings needed to realise certain parts and elements of the construction object, and those required to ensure development of an accurate construction cost estimate and construction of the building.

11.3. The volumes of the construction works shall be clear and unambiguous so that the building contractor may calculate the construction work costs without any additional preparation and unjustified risk.

11.4. The solutions shall apply modern materials and equipments in order to enable use of progressive and rational construction methods reducing the construction period of the structure, construction costs, structure operation costs, as well as extending the life-time of the structures.

11.5. Only materials and products certified in the European Union shall be used that have their distributor’s guarantee period for minimum 2 years after putting the object into service.

11.6. The quality standards of finishing materials and equipment shall comply with the significance of the building and the functional purpose of the premises, as well as with comfortable, effective and safe operation.

11.7. Such engineering equipment, finishing materials and interior elements (e.g., doors etc.) shall be provided for that would not unduly increase the costs of construction and maintenance of the object. Any selected materials shall be agreed with the Contracting authority. When selecting materials and solutions, the amount of the funding granted and confirmed by the Cabinet Regulation shall be considered.

11.8. The composition of the design technical documentation shall comply with the effective building regulations of the Republic of Latvia and the additional requirements indicates in the Contracting authority’s Technical specifications.

11.9. Explanatory memorandum of each design part shall include description of the quality levels of the main works and the control criteria thereof.

11.10. Any errors or shortcomings committed in the construction plan shall be eliminated at the design author’s expense over the entire design planning and construction period.

11.11. A positive opinion of the technical examination shall be obtained for the construction plan.

11.12. The Contracting authority shall accept the design after obtaining a positive opinion of the technical examination.

11.13. The designer’s task is to ensure weekly (or based on agreement with the Contracting authority more seldom/often) design meetings.

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EXPERT-EXAMINATION OF THE CONSTRUCTION PLAN

12.1. The Contracting authority shall ensure the expert-examination of the construction plan. 20 calendar days of maximum 4 (four) weeks shall be planned after the receipt of all the design materials. The Contracting authority shall cover the costs expenses of the first examination. In case repeated or additional examination of certain parts is needed, the respective expenses shall be covered by the Contractor, i.e., the Contracting authority shall cover the expenses of the repeated examination and invoice the Contractor accordingly,the Contractor shall cover the expenses incurred by the Contracting party due to the repeated examination.

12.2. Cooperation during an expert-examination of the construction plan

12.3. The Contracting authority shall organise the expert-examination of the construction plan.

12.4. The Contractor shall include expert examination in the design development timetable.

12.5. The Contractor shall submit to the Contracting authority for an expert-examination a full construction plan in line with the technical specifications.

12.6. The Contractor shall prepare responses to the experts’ questions and provide correction of the parts of the construction plan within 2 (two) business days.

12.7. The Contractor shall eliminate any shortcomings and objections detected by the experts if any. Term of a repeated examination shall be up to 2 (two) weeks, and it shall be included in the total construction period. For the sake of time economy, an option to cooperate with experts during design planning shall be provided for so that the working drawings may be submitted to the experts during the design planning period.

13.

AUTHOR SUPERVISION

13.1. Author supervision shall be performed on the site as required, but at least once per week to provide careful examination and verification of the performed construction works.

13.2. Quality control of the work performed on the site and compliance control of the performed work with the solutions provided in the construction plan shall be performed.

13.3. The Author supervision shall include photo documentation of the entire construction process and of the committed defects.

13.4. Quality and compliance control of the construction products and construction materials used in the object shall be performed in reference to those indicated in the construction plan.

13.5. Performance of the construction works in accordance with the respective construction plan documentation shall be controlled.

13.6. Any unwarranted deviations from the construction plan or the requirements of Latvian construction standards if any detected shall be first documented in a pre-printed template and the Building contractor shall be given time to eliminate the detected shortcomings. If the building contractor fails to eliminate the indicated shortcoming or deviation within the given term, it shall be documented in the author supervision log and signed by a certified architect or building engineer.

13.7. If deviations from the accepted construction plan are committed in the object and a corrective solution is needed, then such a solution shall be provided in the form of supplementary drawings no later than within a week depending on the difficulty of the situation. Such complimentary drawings shall be submitted to the Building contractor in 3 copies (also

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electronically if required). All the complimentary drawings shall be documented in the author supervision log.

13.8. Solutions in the form of complimentary drawings shall also be elaborated within a week by the manager of construction works’ request via phone or email. All and any deviations from the accepted construction plan that have been agreed with the design authors and the Contracting authority shall be documented in the author supervision Log.

13.9. At the end of the author supervision a volume of the complimentary drawings shall be submitted to the Contracting authority and the building contractor where all the approved and documented in the author supervision log complimentary drawings are wrapped up.

14.

MAIN CONDITIONS/ BASIC REQUIREMENTS FOR CONSTRUCTION WORKS

14.1. The Contractor shall perform the construction works in accordance with the construction plan elaborated by the Contractor themselves and with other design documentation, considering the effective laws and regulations of the Republic of Latvia.

14.2. The Contractor shall be obligated to obtain all the permits required to perform construction works. The Contractor shall agree with the Contracting authority the launch and implementation order of the construction works.

14.3. Preparation, submission of all the documentation, executive documentation etc. documents required to put the works into service as well as obtaining approvals from the competent authorities shall be sole and exclusive obligation of the Contractor.

14.4. Prior to the construction launch, the Contractor shall be obligated to elaborate a detailed design for the work performance, and by the construction launch the Contractor shall elaborate and agree with the Contracting authority the Internal rules of the construction site where the following shall be particularly indicated:

14.4.1. Work performance in the Object considering that it is situated in the territory of Daugava Stadium, where daily events, sport events and Song Festival events take place.

14.4.2. Cleaning and arrangement measures on the construction site and its close proximity, particularly considering the timetable of public events.

14.4.3. Road transport traffic and parking spots for the workers’ cars, particularly considering the timetable of public events.

14.4.4. Traffic signs and informative signs for workers, athletes, school youth, teachers and parents regarding access and reaching the school when the main drive is closed.

14.5. Prior to construction launch, the Contractor shall be obligated to replant the particularly valuable tree - European beech No. 33/21552 in line with the instructions in the master plan. Over the entire further Construction process, the Contractor shall ensure such conditions for the tree to ensure ingrowth of the tree, which will be the Contractor’s responsibility.

14.6. The Contractor shall be obligated to pay for the utilities during the construction period (electricity, water and sewage, heating etc.).

14.7. The Contractor shall be obligated to develop and file the Construction performance documentation in line with the legal acts over the entire construction period.

14.8. If the Contractor detects any errors or inconsistencies in the construction plan developed by themselves, construction volumes or any other documentation related to the construction

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works, or if they establish any unforeseen circumstances that may hinder the contractual liabilities or affect safety or quality of the object, the Contractor shall be obligated to promptly notify the Contracting authority in writing also providing how the Contractor will eliminate the occurred problem. The Contractor shall continue to fulfil the Agreement insofar it does not affect safety or the object or personnel unless the Contracting authority has not instructed in writing to pause the construction works. If the Construction works have been suspended, it shall be resumed after the Contracting authority has instructed to continue the construction works in line with the work volumes indicated in the Agreement.

14.9. The Contractor must not by any means deviate from this Technical specification or the construction plan approved by the expert-examination without prior written approval from the Contracting authority. Furthermore, the Contractor must not launch any construction work not included in the Agreement without written covenant between the parties regarding performance of such works.

14.10. Any construction waste generated during the object realisation shall be handled in line with the Waste Management Law and the Riga City Council binding provisions.

14.11. The Contractor shall perform the construction works in the frugal and rational manner when using the construction products and the resources allocated for construction.

14.12. The Contractor shall have in place all required measures to prevent any existing or potential damage to any third party due to the construction works.

14.13. The Contractor shall elaborate executive schemes of all the engineering networks in digital and paper form. When a monthly statement of the performed works is submitted to the Building custodian, it shall have appended with a full set of the executive documentation.

14.14. Deeds regarding the closed works shall be drawn up specifically for each closed work performed without summarising those in a single deed.

14.15. The Contractor shall be obligated to prepare operation manuals for the installed units and systems as well as maintenance manuals in the Latvian language.

14.16. The Contractor shall install a notice board and informative signs regarding projects co-funded through the EU Structural Funds on the site. They shall be made of durable material, and the colour and signage inscriptions shall be in line with the respective requirements. The Contractor shall submit the notice board and other signs to the Contracting authority for approval.

14.17. The Contractor must not use the construction site or any other territory of certain works to erect any advertising signs without the Contracting authority's written consent.

14.18. The Contracting authority shall be fully entitled to require movement to a better spot any sign, inscriptions or adverts or require removing those from the site if they are of low-quality performance or non-compliant with the general social norms.

14.19. The Contractor shall ensure that all inscriptions and adverts are remover before the works are conveyed to the Contracting authority.

14.20. The Contractor shall fully equip the construction site. Labour safety and health protection regulations shall be observed in line with the national standards. The Contractor shall not require that the workers work in non-sanitary circumstances or circumstances non-compliant with the accident prevention requirements. Number of bio-toilets shall be sufficient.

14.21. During the entire construction period, fencing or temporary walls shall be installed and maintained around the site according to the guidelines of the design for work performance. The Contractor shall regularly inspect the fencing and take immediate efforts to fix it if required. The fencing and scaffolding shall be in good condition over the entire construction period.

14.22. The Contractor shall prepare the needed working drawings for all the Works to be performed. These drawings shall be delivered to all the parties involved in construction as soon as possible after execution of the Agreement to provide enough time to consult the material and provide comments prior to launch of the Works. If required, the drawings shall

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be concerted with the other working drawings that may be interrelated and affect performance of the current Works.

14.23. All the drawings submitted to review shall be presented in print and signed by the Contractor. Construction works may be only performed in line with the construction plan and working drawings.

14.24. Building custodian’s or Contracting authority's accept provided regarding certain work details or technical drawings shall not exempt the Contractor from their responsibility for any errors or incorrect performance of the Works.

14.25. Building custodian's and Contracting authority’s signatures shall be deemed to have general nature rather than indicating any special verification, and they shall not exempt the Contractor from their responsibility to verify the materials and provide equipment, and perform the Works in line with the construction plan, specifications and the manufacturer’s instructions.

14.26. At any time during working hours, when they see it needed, the Contracting authority or Building custodian may visit the construction site or the company producing the respective material/equipment in order to ascertain the production quality. The materials and equipment shall be verified before they leave the manufacturer’s or supplier's territory as well as after the receipt thereof on the site.

14.27. The Contractor shall provide the Building custodian with time to conduct all the needed assessment of materials and permit storage thereof on the site. No delays caused due to any material non-assessed or non-delivered on time shall be deemed as objective base to neglect the final deadlines for putting the object into operation.

14.28. By the Building custodian’s request, the Contractor shall deliver all and any manufacturer's documents - quality certificates, verification sheets, compliance declarations and statements etc. confirming that the material has been verified in line with the general standards and is compliant therewith to the site free of charge.

14.29. No temporary structures or buildings erected on the construction site shall be used for dwelling.

15.

TOTAL CONSTRUCTION COSTS (BP/AU/B)

The tender proposal price (Agreement price) shall not be changed and no additional costs shall be accepted. The Contracting authority assumes that the Contractor as a diligent professional has considered all the available documents, the situation in situ, has assessed all the potential risks related to the seasonal nature of the works and accessibility of Daugava Stadium to the public (Song Festival 2020 etc.), and has surveyed all the potential expenses and costs at the moment of submitting the proposal and in the future during the construction works. Thereby the tender proposal (Agreement) price shall be final and no increase thereof shall be negotiated.

16.

CONDITIONS FOR INSPECTION AND ACCEPTANCE OF THE CONSTRUCTION WORKS

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16.1. Construction monitoring - inspection and acceptance of the works - shall be performed by a representative assigned by the Contracting authority - Building custodian.

16.2. Prior to submitting a monthly work performance statement to the Contracting authority, the Contractor shall agree the executive documents with the Building custodian by presenting full set of the executive documentation. Such a monthly statement of performed works shall be submitted to the Contracting authority in 3 copies. Work performance statement and executive forms shall be also submitted to the Contracting authority electronically (to the contact indicated by the Contracting authority). The Contracting authority shall approve the monthly work performance statement after the receipt of the Building custodian’s approval. The Contracting authority may require reviewing the executive documentation on which the work volumes are based and the appended compliance documentation (declarations, certificates, executive schemes etc.).

16.3. Acceptance of the works performed in each calendar month shall be documented by the means of a work performance statement signed by the Calendar authority and the Contractor before the 10th day of the following month. An invoice for the performed works shall be submitted after the Contracting authority's accept of those statements has been received.

16.4. Upon finishing the construction works, the Contractor shall prepare and submit to the Contracting authority full set of executive documentation of the performed works in 3 original copies that are fully prepared to put the object into operation (including the opinions from the issuers of the technical regulations etc.), in line with the laws and regulations of the Republic of Latvia and the Contracting authority’s requirements - so that the object be accepted into service no later that before the deadline of the construction works.

16.5. The Contractor shall order an updated cadastral survey file and pay for it.

16.6. The Contractor shall perform other obligations/ implement measures following from preparing the object to be pt into service.

16.7. By the Contracting authority’s request, the Contractor shall be obligated to provide a report of the construction progress or information regarding any matters related to the construction works. Such a report or information shall be submitted to the Contracting authority within 3 (three) working days from the receipt of the respective request.

16.8. The Contractor shall ensure weekly photo documentation of the Work progress. Along with the executive documentation, 1 CD with the electronic photos shall be submitted to the Contracting authority.

16.9. The construction works shall be only accepted by the Contracting authority after entire completion of the object and elimination of all the potential shortcomings detected by the Contracting authority.

16.10. The deed of fulfilment of all the contractual liabilities shall be signed by the parties after the Design endpoints have been achieved and the construction warranty period has expired, as well as after fulfilment of all the warranty works applied during the warranty period.

17.

TASKS AND OBLIGATIONS RELATED TO OCCUPATIONAL SAFETY OVER THE CONSTRUCTION PERIOD

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17.1. When fulfilling the agreement, the Contractor shall be obligated to observe the Occupational Safety requirements and standards in construction works.

17.2. Prior to the launch of construction works, the Contractor shall be obligated to send to the State Labour Inspectorate a preliminary notification about construction works.

17.3. The Contractor shall place the information provided in the preliminary notice on the construction works on the construction site so that it be easily visible and renovate it regularly if required.

17.4. The Contractor shall ensure that the agreement fulfilment is participated by a professional - coordinator of occupational safety who fulfils his/her duties as per the laws and regulations.

17.5. The Contractor shall ensure that the coordinator of occupational safety is a natural person with qualifications comp;lying with the requirements indicate din the Procurement Regulations.

17.6. The Contractor shall ensure that prior to launch of the construction works, an occupational safety plan is drawn-up.

18.

CONSTRUCTION MEETINGS

18.1. Any administrative matters regarding the construction works shall be settled and reviewed in construction meetings participated by the responsible Manager of construction works, Author supervisor, a representative of the Contracting authority, and the Building custodian, as well as any persons invited thereby.

18.2. Construction meetings shall be convened once per week unless the Parties have agreed upon different arrangements for construction meetings.

18.3. Convening and organization of construction meetings as well as minutes taking thereof shall be ensured by a Contracting authority’s representative or the building custodian.

18.4. The Manager of construction works shall be obligated to be properly prepared for the construction meetings - detailed reports on the performed and scheduled construction works shall be prepared and submitted, as well as regarding any other matters related fulfilment of the construction agreement.

18.5. Crucial inquiries by the Contractor/information to the Contracting authority shall be only submitted in writing and timely - at least 1 day before the respective construction meeting.

19.

ADJUSTMENT AND TESTING OF THE BUILT SYSTEMS AFTER COMPLETION OF THE CONSTRUCTION WORKS

19.1. The Contractor shall perform ice laying, adjustment and inspection of the systems within 1 month after completion of the construction works.

19.2. The Contractor shall entirely convey adjusted and inspected systems within 5 months from completion of the construction works and shall perform monitoring/testing of the systems performance in May 2021, when the Ice Hall is to be used as the training hall during the World Ice-Hockey Championship.

19.3. The Contracting authority’s personnel shall be instructed and trained to adjust and maintain the building and equipment in order to achieve the values and rates defined in the Design.

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20.

FULFILMENT OF THE LIABILITIES OF WARRANTY PERIOD

21.1. To perform energy performance calculations, elaborate and submit an updated existing energy performance certificate and reports of the energy audits for the building, considering the particular construction materials and equipment applied during the construction;

21.2. To instruct the Contracting authority’s personnel on adjusting and maintaining the building and equipment in order to achieve the values and rates defined in the Design;

21.3. To perform improvements or supplements to the works done performed if the rates defined in the Design are not achieved;

21.4. To prove the Design endpoints repeatedly if any repairs or improvements have been necessary during the warranty period;

21.5. To perform construction works under the warranty and other works to be referenced to the warranty coverage for the performed works.

21.6. The warranty period shall be determined in line with the Contracting authority’s needs and based on the minimum terms set forth in the legal acts. Group III buildings - 5 years after signing a deed.

21.7. Additional warranties are particularly required for the following elements:

21.7.1. Roof water resistance - 10 years

21.7.2. Protective anti-moisture measures applied to the foundation - 10 years

20.8. The warranty period shall be calculated as of the date when the Deed of conveyance-acceptance of construction works has been mutually signed.

20.9. The Contractor shall ensure that the manufacturers’ warranties granted for the construction products (materials, products and equipment) used in the Construction be transferred to the Contracting authority along with submitting the Deed of conveyance-acceptance of construction works and the Contracting authority may use those freely. The warranty period determined by the Contractor must not be shorter or the conditions inferior to those defined by the manufacturer (seller, supplier) of the construction products.

20.10. The Contractor’s liabilities during the warranty period are covered in the Agreement provisions. The Contracting authority shall be responsible for the running and daily maintenance activities falling outside the Contractor’s responsibility and competence (e.g., damage caused by the User).

20.11.If following the Contractor’s best effort to eliminate the detected faults within up to two months and the Contractor fails the tests and achieve the endpoints of the Design after repeated inspections (maximum 2 times), the Contracting authority shall be entitled to either apply the contractual penalties or engage other entrepreneurs (specialists) to eliminate the defects and recover the incurred costs from the Contractor.

20.12.During the warranty period, the Contractor shall ensure that the Contracting authority can contact the manager of construction works or any other experienced engineer who participated in the construction in order to promptly solve the matters related to the warranty.

………………………………………………………………………………………………………

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