Sesoc Design Features Report

PREFACE - DESIGN FEATURES REPORT The Document that follows is a SESOC preliminary proposal for a Design Features Report (DFR) to link to the Construction Industry Council Design Documentation Guidelines. The Design Documentation Guidelines call for a Design Features Report to be completed at the Preliminary Design Phase, and then updated as the documentation proceeds – refer extract below from the Detailed Design Phase.

Figure 1: Extract from Design Documentation Guide, copyright CIC

The intention of this document is to provide a comprehensive template for structural engineers to work from for all projects. Its content is deliberately broad, to cover most structure types and scales. It is recognised that the scope of this document may be broader than many projects would demand, but we note that it is easier to strike our irrelevant sections than to add them in later. This document contains a significant amount of commentary and prompts for users. It is formatted as hidden text, and can be toggled on and off using the ¶ button on your Word toolbar. The text will appear as green text when toggled on. There is no need to delete this text – when printing, use >Tools>Options>Print to select whether you want the hiddnetext to print or not. Althogh substantially ready for use, this document is being published for comment. In particular we seek input on the following:

1. Overall content – do you consider there to be enough information in here to provide a comprehensive coverage of most structures?

2. Ease of use – is the insertion of commentary in the document as hidden text helpful, or would a separate document be more useful?

A separate short-form document is being prepared for small projects – generally applicable to domestic projects that are substantially in compliance with NZS3604, or other projects of a similar scale (although it is noted that these are rarely likely to have a CIC Design Documentation checklist requirement for a DFR).

SESOC DFR draft 1_3.doc

P R O J E C T N A M E

P R O J E C T A D D R E S S

D E S I G N F E AT U R E S R E P O R T Report Prepared by: Reviewed by: A.N. Engineer A.N.Other Project Engineer Role

SESOC DFR draft 1_3.doc

Contents 1 GENERAL 1

1.1 Objective ............................................................................................................. 1 1.2 Scope .................................................................................................................. 1 1.3 Means of Compliance ......................................................................................... 1 1.4 Alternative Solutions ........................................................................................... 1

2 THE STRUCTURE 1 2.1 General ............................................................................................................... 1 2.2 Gravity structure.................................................................................................. 2 2.3 Lateral Load Resisting structure ......................................................................... 2 2.4 Significant Design Features................................................................................ 2

3 SOIL CONDITIONS 2 3.1 Description of Site Soil Conditions...................................................................... 2 3.2 Soil Design Values.............................................................................................. 2

3.2.1 Ultimate Soil Strengths..............................................................................2 3.2.2 Strength Reduction Factors ....................................................................2

4 DESIGN LOADS 2 4.1 General ............................................................................................................... 2 4.2 Imposed Loads ................................................................................................... 2

4.2.1 Vertical loads ............................................................................................2 4.2.2 Barriers and Handrails ..............................................................................3 4.2.3 Retaining Values.......................................................................................3

4.3 Wind Loads ......................................................................................................... 3 4.3.1 Site Wind Speed Profile............................................................................4 4.3.2 Parts of Structure.......................................................................................4 4.3.3 Glazing .......................................................................................................5 4.3.4 Steel Stud Wall Framing. ..........................................................................5

4.4 Snow and Ice Loads ........................................................................................... 5 4.5 Seismic Loads..................................................................................................... 5

4.5.1 Site Parameters.........................................................................................5 4.5.2 Analysis Methodology .............................................................................5 4.5.3 Seismic Load Coefficient ........................................................................5 4.5.4 Parts and Portions.....................................................................................6

4.6 Construction Loads ............................................................................................. 6 4.7 Special Load Cases ............................................................................................ 6

5 SERVICEABILITY CRITERIA 6 5.1 Seismic Deflections............................................................................................. 6 5.2 Wind Deflections ................................................................................................. 6 5.3 Gravity Deflections.............................................................................................. 6 5.4 Shrinkage and Creep Constants......................................................................... 6 5.5 Design Life for Durability..................................................................................... 7

5.5.1 Design Life..................................................................................................7 5.5.2 Durability Provisions ..................................................................................7 5.5.3 Summary of Surface Treatments............................................................7 5.5.4 Maintenance Requirements of Surface Treatments ..........................8

SESOC DFR draft 1_3.doc i Project Name: Project No:

5.6 Floor Vibration..................................................................................................... 8 5.7 Fire Resistance Ratings...................................................................................... 9

6 SOFTWARE 9 7 DRAWING AND SPECIFICATION NOTES 9

7.1 Floors .................................................................................................................. 9 7.1.1 Design Loads .............................................................................................9 7.1.2 Fire rating Requirements..........................................................................9 7.1.3 Propping Requirements...........................................................................9

7.2 Foundations ...................................................................................................... 10 7.3 Material Properties (Typical) ............................................................................. 10

7.3.1 Concrete Strengths ................................................................................10 7.3.2 Reinforcing Steel.....................................................................................10 7.3.3 Concrete Masonry .................................................................................11 7.3.4 Structural Steel ........................................................................................11 7.3.5 Structural Timber .....................................................................................11

8 Proprietary Systems 11 8.1 Manufacturer Design Requirements................................................................. 12 8.2 Manufacturer construction requirements .......................................................... 12

9 Construction Monitoring 12 9.1 Soil Testing and verification.............................................................................. 12 9.2 Materials Testing............................................................................................... 12 9.3 Temporary support and shoring........................................................................ 12 9.4 – Other ??? ....................................................................................................... 12 9.5 Inspection Requirements .................................................................................. 12

SESOC DFR draft 1_3.doc ii Project Name: Project No:

1 GENERAL

1.1 Objective The Design Features Report (DFR) is a detailed document defining the structure’s design criteria and recording key decisions or outcomes. It outlines design loading, structural modelling assumptions, material properties, foundation requirements and design standards. The DFR also defines the calculation procedure and checking principles to be followed, providing a clear explanation of the full design.

1.2 Scope The scope is in accordance with the Design Brief and Conditions of Engagement. In general terms, the scope of work is as follows:

1.3 Means of Compliance The design of the structure is in compliance with the New Zealand Building Code (NZBC), section B1. The following standards have been used:

• AS/NZS1170:2001 • NZS3101:1995 • NZS3404:1997

1.4 Alternative Solutions The following alternative solutions have been adopted in the design of the structure:

1. NZS3101:2006 has been used in consideration of….

2 THE STRUCTURE

2.1 General The structure is….. The location of the structure is…… The design life of the structure is 50 years.

SESOC DFR draft 1_3.doc 1 Project Name: Project No:

2.2 Gravity structure The roof is…..

2.3 Lateral Load Resisting structure The roof and floor diaphragms span horizontally to distribute load to ……

2.4 Significant Design Features

3 SOIL CONDITIONS

3.1 Description of Site Soil Conditions Refer to the Soils report - file ?????????. ##Soil conditions are generally uniform over the structure ‘footprint’ with gravelly silts and sands overlying gravels. The water table is typically at a depth of 2.5m. For the purposes of this work, a depth of 2.0m has been assumed. Typically this will only affect the lift pits. ##

3.2 Soil Design Values

3.2.1 Ultimate Soil Strengths

3.2.2 Strength Reduction Factors Ultimate limit state strength reduction factors: ϕ = 0.5 ϕ = 0.8 (seismic)

4 DESIGN LOADS

4.1 General For the purposes of consideration of loading, this structure Importance Level 1/2/3/4/5 in accordance with AS/NZS 1170.0:2002.

4.2 Imposed Loads

4.2.1 Vertical loads


The table below summarizes all vertical loads including both superimposed dead and live loads. In all cases, a minimum superimposed dead load of 0.5 kPa is applied.

Table 1: Imposed Gravity loads Level/Area Use Live Load Superimposed

Dead Load Ground Floor

Roof Plant/Store Rooms Storage 5.0 kPa 0.5 kPa

4.2.2 Barriers and Handrails The following loads apply for all barriers and handrails.

Table 2: Barrier and Handrail loads Top Edge Infill

Horizontal Vertical Inwards, outwards, or downwards

Horizontal Any direction

Level/area

kN/m kN/m kN kPa kN

4.2.3 Retaining Values Soil retaining loads are generally in accordance with the recommendations of the Soils report. For the design of all retaining walls, the following parameters shall be used:

= ?? kN/m3 • ρs

• Ka = • K = o

• K = p The water table shall be assumed to be at ??? for the design of retaining walls. Specific seismic design for the retaining walls is/ is not required, because…...

4.3 Wind Loads In accordance with AS/NZS 1170.2:2002.


The natural frequency of the structure is ??Hz, therefore the structure is/is not wind sensitive. A static analysis procedure is applicable.

4.3.1 Site Wind Speed Profile

Region: A6/A7/W & shadow zone/outer zone V : ??? m/s R M , wind direction multiplier: N d NE E SE S SW W NW 1.0 Any Terrain category 1/2/3/4 SLS/ULS Height, z: m Mz,cat, terrain multiplier: M , shielding multiplier: s

, topographic multiplier: Mt

Table 3: Directional Site Wind Speeds Vsit,β, for site direction: Direction SLS ULS m/s m/s 1 2 3 4

4.3.2 Parts of Structure Pressure coefficients are used in accordance with ?? to give design wind pressures. Typical wind pressure coefficients used are:

Table 4: Wind Pressure Coefficients max min Internal, Cp,i 0.6 -0.3


Wall Cp,e, windward Wall Cp,e, leeward Wall Cp,e, side Roof Cp,e, upwind Roof Cp,e, downwind Roof Cp,e, crosswind Canopies

4.3.3 Glazing Wind loads for glazing to be in accordance with the NZ Building Code and NZS 4223:1985, Code of practice for glazing in buildings.

4.3.4 Steel Stud Wall Framing.

4.4 Snow and Ice Loads The structure is in Region N1/2/3/4/5, and the elevation is ???m above sea level. Snow and ice are/are not significant loads for this structure.

4.5 Seismic Loads

4.5.1 Site Parameters Site subsoil class: A/B/C/D/E Proximity to fault: >100km.

4.5.2 Analysis Methodology The seismic analysis has been completed in accordance with AS/NZS 1170.5:2002, using the equivalent static/modal response spectrum/time history analysis method. Design Spectra are in accordance with AS/NZS 1170.5:2002 for site subsoil class A/B/C/D/E. For the purposes of the analysis, the project x and y directions are considered to be the project north and east directions respectively.

4.5.3 Seismic Load Coefficient In accordance with AS/NZS 1170.5:2002 section ?.


Zone factor, Z Period, Tx Ty Ch

4.5.4 Parts and Portions In accordance with AS/NZS1170.5:2002 section 8. Refer to calculations.

4.6 Construction Loads

4.7 Special Load Cases To be reviewed as work proceeds - typically will be as a result of construction requirements.

5 SERVICEABILITY CRITERIA

5.1 Seismic Deflections Refer to calculations - File 2930-040. Type of Analysis : Static/Response Spectrum/Time History Maximum Allowable : ULS 0.02h for h <=15m (generally the case) n

-15)/15 for 15m <h <30m 0.02h - 0.005(hn n SLS in accordance with Table C2.4.1 NZS 4203:1992

5.2 Wind Deflections Particular elements are designed to the recommended serviceability deflection limits of AS/NZS 1170.0:2002, Table C1.

5.3 Gravity Deflections Particular elements are designed to the recommended serviceability deflection limits of AS/NZS 1170.0:2002, Table C1.

5.4 Shrinkage and Creep Constants


The effects of shrinkage and creep in beams and slabs have been accounted for by multiplying the dead and sustained live load deflections by the factor Kp. Where Kp = 2 - 1.2*A's/As The effect of creep and shrinkage in columns is considered negligible due to the low height of the structure.

5.5 Design Life for Durability

5.5.1 Design Life Foundations : 50 yrs Superstructure: 50 yrs Note: non structural elements and cladding specification are by [architects name? / others] and are not covered by this design features report.

5.5.2 Durability Provisions Durability provisions are achieved by: Acceptable Solutions B2/AS1 • Reinforced Concrete: NZS 3101: 1995 Part 1 Section 5 is an acceptable solution

for durability with durability requirements met through covers equal to or in excess of the requirements of the standard.

• Timber: NZS 3602: 2003 Part 1 is an acceptable solution for meeting durability through treatment in accordance with the standard.

• Light Timber Framing Structures: NZS 3604:1999 is an acceptable soloution for meeting durability requirements of buildings within its scope and includes framimg and metal fixings.

Alternative Solutions • Structural Steel: There is no acceptable solution available for structural steel and

protection is provided through surface treatment in accordance with NZS/AS 2312:2002.

5.5.3 Summary of Surface Treatments


The table below summarises the surface treatments for the structural elements covered by this design features report.

Table 5: Schedule of Surface Treatments Element Design

Life Exposure Category

Surface Treatment in Time to first accordance with NZS/AS 2312 major

maintenanceExposed exterior 50 Medium Metal Spray Zinc 150 microns 25+

NZS 2312 - TZ150 Structural Steelwork to structure - Portal Rafters Canopy structures 50 Medium Hot Dipped Galvanised (after

fabrication) 85 microns 25+

unpainted and NZS 2312 - HDG600 painted Alternative + decorative paint* system HDG + 80 microns NZS2312 - HDG600P2 (*paint system by architect)

Interior Structural 50 Low Painted – Zinc Primer with 2 coats Acrylic Latex.

15-25 Steelwork

5.5.4 Maintenance Requirements of Surface Treatments The maintenance requirements for the above protective coating systems in 5.5.3 are as per NZS/AS 2312. From section 10.2 of the standard the criteria for assessing when to paint or repair the coating systems are: [INSERT SECTION 10.2 FROM THE STANDARD NZS 2312 INTO DFR] (to make the maintenance requirements treatments clear to the T/A, Reviewer, and Client)

5.6 Floor Vibration

The floors have been checked using the criteria proposed in the BRANZ report SR 14 (1988) "Serviceability Criteria for Buildings". Transient vibration limits for composite structural steel floors/beams to be checked using a method proposed by Murray which determines the amount of damping required for acceptable behaviour. Transient vibration limits for the precast seating units to be not less than 5 hz. Continuous vibration limits have been checked using a method proposed by Allen which identifies floor systems which are likely to resonate when subjected to cyclic excitation. It was found that the floor system proposed falls within acceptable limits on both counts.


5.7 Fire Resistance Ratings Typically, fire plan requires 30 min structural rating. Compliance is to be achieved via: Concrete - covers in accordance with NZS 3101:1995 Steel - boarded or painted passive treatment or verified by specific design.

6 SOFTWARE The following computer applications were used for the design:

Table 6: Software used in design Analysis type Software used Archive files Seismic response spectra Name them

analysis 2D frame analysis General spreadsheet List current/final design

spreadsheets individually design Etc

7 DRAWING AND SPECIFICATION NOTES The purpose of this section is to ensure that the design requirements are included in the drawings or the specification.

7.1 Floors

7.1.1 Design Loads Refer to Section 2 DESIGN LOADS, section 5.3 Gravity Deflections and Section 5.6 Floor Vibration.

7.1.2 Fire rating Requirements Refer to Section 5.7 Fire Resistance Ratings

7.1.3 Propping Requirements Generally, the propping of composite metal deck slab shall be in accordance with the manufacturer’s recommendations. The propping of precast shell beams and hollowcore flooring units shall be in strict accordance with the manufacturer’s requirements and shop drawings.


The temporary propping and handling of all other precast and insitu concrete and structural steel capacity including roof trusses shall be in accordance with the specification. Generally, this will be the Contractor’s responsibility to ensure compliance with the Building Code and all health and safety regulations.

7.2 Foundations Refer to the Excavation and Concrete - General sections of the specification which discuss in detail all requirements for the foundations.

7.3 Material Properties (Typical)

7.3.1 Concrete Strengths Foundations: ?? MPa Arena Ground Floor: ?? MPa Lift pit walls, base slab ?? MPa Columns - Insitu: ?? MPa Beams - Insitu: ?? MPa Precast columns, beams,frames: ?? MPa Slabs - Insitu: ?? MPa Slabs - Precast : ?? MPa Floor toppings: ?? MPa Precast balcony units ?? MPa

7.3.2 Reinforcing Steel Column Longitudinal Rein: ??? MPa Beam Longitudinal Rein: ??? MPa Slab Rein: ??? MPa Column Ties: ??? MPa Beam Stirrups: ??? MPa


Blockwall Rein: ??? MPa

7.3.3 Concrete Masonry Blockwalls: Grade B

7.3.4 Structural Steel Rolled Steel Sections: 300MPa – Grade 300 L0 to AS 3679.1 ??? Steel Plate General 250 MPa – Grade HA250 to AS1594?? Steel Plate (special) 300 MPa – Grade 300 MOD ???? StelTech Beams etc CHS Hollow Sections eg RHS Hollow Sections: AS 1163 - 350MPa – grade Bolt Grades: Grade 4.6 mild steel and grade 8.8 high strength Tensioning requirements for 8.8 bolts

7.3.5 Structural Timber To come HJH?

8 PROPRIETARY SYSTEMS The following proprietary elements are included in the project:

• Timber Trusses – Pryda etc • Timber Floors and roofs - Posistrut / Beams/ Hyspan / Hy joist / LVL • Timber conectors – Pryda / Lumberlok • Bracing systems – GIB, Hardies, Ecoply • Cold formed “DHS” purlins / rafters - Dimond, HST, Formsteel • Cold formed Studs - • Steel Tray Composite flooring – Hibond / Traydeck / Comflor • Precast proprietary flooring • Precast shell beams


8.1 Manufacturer Design Requirements Include notes here as to the design assumptions and criteria that the proprietary systems must meet. Include description of:

• Loads • Durability • Design Submissions required – design for review, shop drawings, • PS1 and 2(if required)

8.2 Manufacturer construction requirements Inspection QA requirements Producer Statement PS3/4 by manufacturer – or any testing results. ??????

9 CONSTRUCTION MONITORING The design is based on the verification of specific design aspects of the construction by a suitably qualified Chartered Professional Engineer in accordance with ACENZ/IPENZ level CM 1/2/3/4. These include the following assumptions:

9.1 Soil Testing and verification Visual inspection of excavation as work proceeds. This may include the removal and filling of softspots with compacted hardfill as required by the Specification.

9.2 Materials Testing

9.3 Temporary support and shoring

9.4 Inspection Requirements


The following schedule of inspections is to be met in order to meet the required level of Construction Monitoring, and to ensure the intent of the design is met:

Table 7: Schedule of Inspections Inspection Stage Reason Person T/A SHL Geotec

h S= Start M= Monitor ongoing progress C= completion

Pre start S Contract start, specification, programme and methodology

X X

Services Relocation

S, M, C Engineer attends X X

Demolition S, M Engineer attends X X Earthworks S, C Procedure audit X X X Bulk Earthworks

S, M, C Inspect materials verify ground conditions

X X X

Trimming to level

S, M, C Inspect materials X

Backfilling S, M, C Inspect materials X X Piling S Procedure audit X X Drilling S, M, C Verification of drilling

ground conditions X X

Reinforcing steel

S, M, C Pour approval X

Concreting S, M, C Inspect concrete placement

X

Soil nails Drilling S, M, C Verification of drilling

ground conditions X X

Installation S, M, C Inspect installation and grouting

X X

Proof test M, C Select anchors to be proof tested and test

X X

Sprayed concrete

Spraying S, C Equipment, procedure, finish

X

Curing S, C Method X Abutments Excavation S, C Verification of ground

conditions X X X

Backfilling S, M, C Inspect materials X X Reinforcing S, M, C Pour approval X Formwork C Pour approval X Concrete S, M, C Monitor procedure, X


Inspection Stage Reason Person Placement inspect quality and finish Curing S, C Monitor procedure,

inspect quality and finish X

Approaches S Backfill approval X Bearings S Specification check X Steel beams Fabrication S, M, C Welding X Protection S, M, C Coating thickness and

procedure X

Delivery S, C Protection system, dimensions

X

Placement / Erection

S, M, C Procedure, integrity, bolting etc

X

Concrete deck Soffit formwork

S, C Check of integrity of system

X

Reinforcing and Formwork

S, M, C Pour approval X

Pour S, M, C Monitor procedure, inspect quality and finish

X

Curing S, C Monitor procedure, inspect quality and finish

X

Basecourse S, M, C Strength, materials, placement techniques

X X

Drainage S, M, C Materials, placement X Paving S, M, C Surface X X Kerb and channel

S, C Alignment X X

Handrail S, C Position, specification, finish

X X

Road marking S, C Position X


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Sesoc Design Features Report