BCAR & the Technical Guidance Documentscmgevents.ie/wp-content/uploads/2019/10/4.Jim-Mansfield-for-deleg… · Cooperate with design and assigned certifiers and other certifiers Ensure

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BCAR and the Technical Guidance Documents

Conference

17th October 2019

Key Issues

experienced to date

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Conference

17th October 2019

Structural

Engineering

Issues

Parts A and D

Part A Structure

3 Editions

1991 - 34 pages

1997 - 31 pages

2012 - 45 pages

All relate to;

Part A of the second schedule of the Building Regulations relevant at the time of publication

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Jim Mansfield

Part D Materials and Workmanship

4 Editions

1991 – 5 pages

1997 - 7 pages

2005 - 8 pages

2013 – 14 pages

All relate to

Part D of the second schedule of the Building Regulations relevant at the time of publication

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Technical Guidance Document D

Materials and Workmanship

4 Editions

1991, 1997, 2000 and reprinted 2005 And 2013

Part A

The Requirements

Section 1

Loading (A1)

Ground

Movement (A2)

Section 2

Disproportionate

Collapse (A3)

Subsection 1

Sizes for certain

structural

elements for

houses and other

small buildings

Subsection 2

Design and

construction of all

building types

Subsection 3

Recovering of existing

roof structures and

structural safety of

external wall cladding

Definitions (A4)

Jim Mansfield

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Part D

The Requirements

D1

Materials and

Workmanship

D2

Letterplates

Section 1

Materials

Section 2

Workmanship

Standards and

Publications

D3

Definition for

this part

Jim Mansfield

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Technical Specifications

Building Regulations are for specific purposes

e.g. to provide, in relation to buildings, for the health, safety and

welfare of persons, the conservation of energy and access for people

with disabilities.

Technical specifications (including harmonised European Standards, European Technical approvals, National Standards and Agrement

certificates) are relevant to the extent that they relate to those

considerations.

Refer to latest editions current at date of publication of TGD but, if revised, newer versions may be used as a source of guidance.

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Definitions for TGD D D3

Proper Materials

Materials fit for intended use and for conditions in which they are to be used, including materials which:

a) Bear a CE mark in accordance with Construction Products Regulations

b) Comply with harmonised standard or European Technical Assessment in accordance with Construction Products Regulations

c) Comply with Irish Standard or Irish Agrement Certificate or alternative national technical specification of any state of the European Economic Area which provides in use an equivalent level of safety and serviceability

European Economic Area means EU, Iceland, Liechtenstein and Norway

UK to be determined after Brexit

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General Section 0.1

Proper Materials

Materials are products, components, fittings, items of equipment, and

backfilling for excavations to be:-

a) Of suitable nature and quality in relation to puposes and

conditions of their use

b) Adequately mixed and prepared

c) Applied, used or fixed to perform the functions for which they are

intended

d) As far as practical free of Chlorofluorocarbons (CFCs)

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Construction Products Regulation

EU 305/2011 of European Parliament and Council

Lays down harmonised conditions for the marketing of

construction products

Repeals Construction Products Directive 89/106/EEC

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Construction Products Regulations

305/2011 Section 0.2 – 0.3

These are European Regulations which supersede previous Construction Products Directive

Basis of European Standards, Specifications, Eurocodes and Execution Standards

Annex 1 7 Basic requirements for Construction works:-

Mechanical resistance and stability ~ Part A

Safety in case of fire ~ Part B

Hygiene, health and the environment

Safety and accessibility in use

Protection against noise

Energy, economy and heat retention

Sustainable use of natural resources

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Close relationship to

Building Regulation

parts

Jim Mansfield


305/2011

European Regulations which supersede previous Construction Products

Directive

Basic requirements for Construction works:-

Construction works as a whole and in their separate parts must be fit for their

intended use, taking into account in particular the health and safety of

persons involved throughout the life cycle of the works. Subject to normal

maintenance, construction works must satisfy these basic requirements for

construction works for an economically reasonable working life

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305/2011

Mechanical resistance and stability

The construction works must be designed and built in such a way that the

loadings that are liable to act on them during their constructions and use will

not lead to any of the following:-

a) Collapse of the whole or part of the work

b) Major deformations to an inadmissible degree

c) Damage to other parts of the construction works or to fittings or installed

equipment as a result of major deformations of the load bearing

construction

d) Damage by an event to an extent disproportionate to the original cause

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305/2011

This document also sets out the requirements

for Harmonized standards, for CE Marking.

CE marking provides information on manufacturer,

Product, third party assessment, reference to DoP,

hEN or EAD and level or class of declared

performance

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Material documentation

Important part of BCAR process

CE marking does not confirm

suitability for use

Essential that Declared

performance is fit for intended use. Jim Mansfield

Technical Specifications Sections 0.4 -0.11

Harmonized standards (hENs) developed by CEN provide

manufacturers with route to DoP and CE marking for a particular

product. These have an AnnexZA in the standard.

There are also non-harmonized standards developed by CEN which

do not have an Annex ZA and do not provide CE marking.

In Ireland European Standards are referred to as I.S. EN xxxx and

conflicting National standards are withdrawn by NSAI.

Some I.S. ENs have Irish National Annexes which take account of Irish

Climatic conditions and Irish Practice.

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Technical Specifications Sections 0.4 -0.11

There are differences in approach between traditional I.S.s and BSs with European standards as the latter are less prescriptive and do not set minimum performance levels for specific uses.

There may be Irish National Annexes or Standard Recommendation (SRs), which give guidance for Ireland.

There may be National standards for items not covered by European Standards

Agrement Certificates apply to products and processes which do not fall within scope of existing standards. These, if issued, confirm that new building products, materials, techniques or processes are safe and fit for purpose in accordance with the Building Regulations.

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National Standards of Safety

National standards of safety take precedence with National

Authorities responsible for Safety levels in the member states.

Irish Building Regulations take precedence with Irish National Annexes

giving National Choice and allowing determination of Safety Levels.

Irish National Annexes take account of Irish Climatic conditions and Iris

Practice.

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Building Control

Building Control including Building Control Regulations and BCMS

Building Regulations including Technical Guidance documents

Construction Products including, Construction Products Regulations,

Brexit, Product contact points and market surveillance.

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Building Control

Building Control including BCMS

BCMS Building Control Management System

Refer to “Code of practice for Inspecting and Certifying Buildings and Works” published by Department of Housing, Planning, Community and Local Government September 2016

Roles and Duties

“Buildings be designed and constructed in accordance with the relevant requirements of the Building Regulations”

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Building Control

Building Owner

Ultimately responsible

Ensure appoint a competent builder and competent registered professionals.

Ensure FSC and DAC are obtained if required

Sign Commencement or 7 day notice that is lodged

Sign assignment of the Assigned Certifier, a competent registered professional

Sign assignment of a competent builder

Ensure adequate resources and competent persons are available

Duties in respect of change of certifier, builder or owner

Maintain records

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Building Control

Builder

Carry out works in accordance with plans and specification of the professional design team

Accept assignment to design and build the works

Be familiar with the Works requirements as lodged

Ensure a competent person is assigned to oversee the works

Cooperate with design and assigned certifiers and other certifiers

Ensure workmanship complies with Building Regulations

Sign Certificate of Compliance on completion

Provide documents to assist the Assigned Certifier in process of handover and certification

Provide test certificates and confirmations needed by Assigned Certifiers or others

Maintain records

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Building Control

Designer Design respective elements of work in accordance with Building Regulations

Provide design certifier with necessary information for lodgement at commencement

Provide sufficient information to Assigned Certifier

Carry out pertinent work inspections

Notify Assigned Certifier of proposed inspection regime for inclusion in Inspection plan

Provide Ancillary Certificates when required

Maintain Records

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Building Control

Assigned Certifier

Undertakes to inspect and coordinate inspection activities and certify works on completion

Provide and sign relevant statutory certificates

Coordinate ancillary certification

Identify design professionals and specialists from whom certification is required

Identify and obtain all certificates

Coordinate and collate certification of compliance with the builder

Prepare preliminary inspection plan and oversee implementation

Act as point of contact with Building Control Authority including disputes of differences of opinion

Maintain records

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Jim Mansfield

Ancillary Certification

Ancillary Certification Ancillary Certification developed by RIAI, ACEI, EI and SCSI to satisfy the requirements of the Building Control (Amendment) Regulations, (BCAR).

To be used by Consultants, specialists and unregistered Consultants who have been commissioned to provide Specialist Design services and an appropriate Inspection Plan.

Other Ancillary Certificates have been developed by CIF in agreement with RIAI, ACEI, EI and SCSI for Sub-contractors, Specialist Contractors and Sub-Sub-contractors who have been assigned to construct, supervise and certify their works

Developed and agreed with constituent associations of CIF

Wording cannot be altered

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Jim Mansfield


Ancillary Certification Architects’ forms AD, AC and AI

Engineers’ Forms ED, EC and EI, both C&S and M&E

Surveyors’ forms BSD, BS

C and BSI

Specialists’ forms SD, SC and SI

Façade Designer, Fire Consultant, Lift Designer etc.

Sub-Contractor or Specialist CS Assigned by the builder

Sub-Sub-Contractor CSS

These include Certificate and Annex including design information provided and design work carried out by Sub-Contractor, Sub-Sub-Contractor or Specialist

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Ancillary Certification Engineers Forms

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Form ED

Ancillary Certificate of

Compliance Design

Form EC


Compliance on

Completion

Design of the Works

Form EI


Compliance on

Completion

Inspection Plan.

Jim Mansfield

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Form ED


Compliance Design

Form EC


Compliance on

Completion

Design of the Works

Form EI


Compliance on

Completion

Inspection Plan.

Jim Mansfield

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Form ED


Compliance Design

Form EC


Compliance on

Completion

Design of the Works

Form EI


Compliance on

Completion

Inspection Plan.

Jim Mansfield

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Code of practice for Inspecting and Certifying Buildings and Works

Certification

a) Design certificate by Design Certifier

b) Form of undertaking by Assigned Certifier

c) Form of undertaking by builder

d) Certificate of compliance on completion signed by Builder and Assigned certifier

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Blue

commencement

Green

Completion



Supporting certificates from other

members of design team

Ancillary design certificates e.g. ED at

commencement stage

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Jim Mansfield

Blue

commencement

Green

Completion



Supporting certificates from other

members of design team

Ancillary design certificates e.g. EC

and EI at completion stage

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Jim Mansfield

Blue

commencement

Green

Completion

Inspection Plan

Appendix A of Code of Practice sets out all parts of Building Regulations as a

check list for application in full part or not at all

Appendix B Guidance for the development of an Inspection Plan

Refers to Section 7 Of Code of Practice which deals with Construction Stage

Inspection by Certifiers

Risk assessment and Risk management

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Inspection Plan

Risk assessment Assigned Certifier to develop an appropriate Inspection Plan for each

development based on its merits – complexity, environment, nature,

speed and complexity of construction, whether work is covered up,

capability of contractor, seriousness of failure etc.

Plan to be of appropriate intensity and frequency

Not practicable to inspect every item of work so supervision by nuilder

critical.

Use professional skill and judgement in selection of priorities for

inspection.

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Jim Mansfield

Inspection Plan

Risk management Inspect

a) Elements and components the failure of which would be

significant

b) Unusual designs or methods of construction

c) Fire safety elements

d) Types of work etc. which could cause defects seriously detrimental

to the purposes of the Regulations

e) Areas of work necessary to issue certificate on completion

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Jim Mansfield

Inspection Plan

Risk management Scope and frequency of inspections

a) Depend on size and nature of project

b) Critical milestone inspections

c) Notification of inspections - Inspection Notification Framework

(INF)

d) INF is part of Inspection Plan and identifies stages or items to be

inspected with appropriate notice

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Inspection Plan

Risk management a) Follow up procedures for non-compliance

b) Tests of materials

c) Certificates for supplied materials

d) Inspection records, generally test and photographs.

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Jim Mansfield

Inspection Plan

Structural and Civil Engineer

Part A, C and D Issues

Excavations Ground bearing capacity

Foundations Layout and reinforcement

Sub-structure works Stone, Radon barrier

Drainage underfloor and external drainage

water tightness

Superstructure Intermediate floors and roof structure, reinforcement, steelwork etc

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Jim Mansfield

Inspection Plan

Structural and Civil Engineer

Documentation and Test Results

Parts A and D

Declaration of Performance for major materials

Stone, Concrete, Masonry, Steel, Timber

Also reinforcement, wall ties, membranes,

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Jim Mansfield

Certification

Code of practice for inspecting and certifying buildings and works

Appendix B Inspection Plan

Table B1 Example Template

6 of 7 stages largely related to Part A

Table B2 Detached non-complex house

4 of 5 stages involve structural engineer

Appendix C Inspection Template

Stages 1 to 4 relate mostly to parts A and C

Stage 5 Completion Mostly other parts

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Jim Mansfield

Certification

Code of practice for inspecting

and certifying buildings and

works

Roles for building owners, builders designers

and Assigned certifiers

Structure - Structural Engineers

Design respective elements of work

Mostly covered Part A 2nd Schedule and TGD A

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Jim Mansfield

Fees and time

Adequate time and personnel resources have to be allowed for to carry out these inspection

Allow for site visits as appropriate to project and time

to prepare report after as well as site and travel time.

Firms must allow appropriate allowances

Staff should be qualified and briefed abouyt purpose of inspection

Maintain appropriate records

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Jim Mansfield

Other Issues I have been asked to

cover

Structure part A

Wall ties spacing at openings and movement joints 1.1.3.27 and Figure 9

Window and door openings

Wall ties at 300mm maximum centres vertically at sides of openings centred within 225mm of edge of ope,

Similarly wall ties at 300mm centres maximum at movement joints and within 225mm of joint

Along gables wall ties to follow gable and be within 225mm of top and ay centres no further apart than 300mm vertically

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cover

Structure part A

Wall ties in Cavities 1.1.3.27

Wall ties to Material reference 1 or 3 in I.S.EN 845 Table

A1 Austenitic Stainless Steel

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Width of Cavity Wall ties per

square metre

Vertical

spacing

Horizontal

Spacing

50 – 75mm 2.5 450mm 900mm

75-100mm 3.0 450mm 750mm

100-150mm 4.9 450mm 450mm

Greater than

150mm

Seek advice from manufacturer

Jim Mansfield

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Wall ties

The drawing is Diagram 9 in TGD A and shows

wall tie spacing generally for both masonry and

timber frame construction.

The next slide shows requirements for timber

frame construction from Timber Framed

Construction (UK) and I.S. 440 Irish. Spacing is

generally similar but as studs are predetermined

distance apart, this will influence the vertical

distance


cover

Wall Panels

There is much information in I.S. 440 on wall panels in respect of both design and

detailing

Wall Panel framed component forming part of a timber framed wall consisting of

timber framing with sheathing material fixed to one or both faces

Wall plate consists of bottom and top rails with studs with sheathing membrane,

breather membrane etc fixed to sole and head plates

Important that centres of studs are known so that wall ties can be properly fixed

Detailing of dpcs, cavity barriers, fire stops etc all important

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Jim Mansfield

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Timber Frame Construction

Location of wall ties in brickwork

cladding Figure 9.7 I.S. 440 Figure 38

Maximum spacing of

610 apart. This may not

be suitable for wide

cavities.


cover

Structure part A

Notches and holes in timber joists 1.1.2.5

Notches No deeper than .125, (1/8th), depth of joist and

between 0.07 and 0.25 of support

Holes No greater diameter than 0.25 (1/4th) depth of joist,

located at centre line of joist, no less than 3 diameters of

hole apart and located between 0.25 and 0.4 of span.

Horizontal distance between hole and notch not less tha

depth of joist.

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Jim Mansfield

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cover

Strapping of walls and floors 1.1.3.24

Strap walls to floors no further apart than 2000mm by 30 by 5 mm galvanised mild or stainless tension straps

Not required if:-

a) Joists at 800mm or less centres and bear onto wall, 90mm direct or 75mm on wallplate

b) If carried on restraint type joist hangers at no more than 800mm apart

c) If floors are oin either side of a supported wall with contact between floors and walls at spacings no greater than 2000mm

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Jim Mansfield

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cover

Gable Strapping of walls and roofs 1.1.3.25

Strap walls to pitched roofs and generally ceiling joists no further apart than 2000mm by 30 by 5 mm tension straps

a) Provide strap at highest point that will be secure

b) 2m apart on slope at top of wall

c) Ceiling ties can be omitted in certain special dimensional circumstances but better to assume present

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cover

Eaves Strapping of walls and roofs 1.1.3.25

Provide vertical strapping 1000mm long at 2000mm

centres at flat or pitched roofs

May need additional straps for flat roofs, or where

wind speed is high or where site is exposed.

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Jim Mansfield

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cover

Hardcore Filling

Standard Recommendation S.R.21:2014+ A1:2016 is the Irish National Guidance on the harmonised standard I.S.EN 13242:2007+A1:2009 (Under revision)

This requires a DoP which is statutory and must be sent with each load and be on the manufacturer’s website.

This is as a result of pyrite related issues

New version of TGD C now under public consultation , possibly in force later this year.

Main changes are alteration in paragraphs 3.1.4(b) and (d) and new diagram 4

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cover

Hardcore Filling

New 3.1.4 (b) hardcore to be 200mm deep and gas

permeable

to conform with documents mentioned last slide

reference to reactive form of pyrite

blinding layer to be provided

New 3.1.4 (d) relates to diagram 4 with different combinations

T0 Struc, T1 Struc, T2 Perm and T3 Blind

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Jim Mansfield


Conference 2019

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Thank you

Jim Mansfield