G HOMES SPECIFICATION 171122

Any conflict between any of the terms of these documents shall be referred to the Architect for clarification or decision except as otherwise provided for in the Conditions of Contract.W

Q2 THAO DIEN MIXED DEVELOPMENT

-o0o -

ARCHITECTURAL SPECIFICATION

November 2017

Main Contract Builder Work

GENERAL CONTENTS

I A0-10 General

I A1-20 Windows

I A1-30 Sunscreens & Louvers

I A1-40 Metal Cladding

I A1-60 Stone Cladding

I A1-70 External Masonry

I A1-80-1 External Render

I A1-80-3 External Painting & Coating

I A2-10 Applied Finishes for Flat Roofs

I A3-20 Pool Finishes

I A3-40 External Metal work

I A3-50 External Timber work

I A4-10 Internal Plaster and Render

I A4-20 Internal-Painting and Coating

I A4-30 Floor Screeds and Hardeners

I A4-40 Internal Tiling

I A4-50 Timber Flooring

I A4-60 Flooring

I A4-70 Suspended Ceiling

I A4-80 Internal Waterproofing

I A5-10 Dry wall Partition

I A5-20 Internal Masonry

I A5-30 Glass Partitions

I A6-10 Internal Doors

I A6-20 External Doors

I A6-30 Roller Shutter Doors

I A7-10 Fixtures and Fittings

I A8-10 Fire Stopping

I A8-20 Basements

Q2 THAO DIEN MIXED DEVELOPMENT

District 2, H o Chi Minh City, Vietnam

4th Floor Dinh Le Building 01 Dinh Le Street

Ward 12 District 4 Ho Chi Minh City Vietnam

November 2017

GENERAL SPECIFICATIO N

DIVISION A0-10: GENERAL PRELIMINARIES

CONTENTS

1.01 Definitions

1.02 Discrepancies

1.03 Site of the Works

1.04 Contractor to Visit Site

1.12 Contractor's Claims for Extras and Time

1.13 Working Hours, Rates of Wages Etc

1.14 Overtime

1.15 Notices and Fees

1.16 Compliance with Regulations

1.17 Site Safety Precautions

1.18 Plant, Tools, Sheds, Hoardings, Etc

1.19 Cartage of and Loading and Off-Loading of Materials

1.20 Maintenance and Protection of Existing Roads, Footpaths, Steps Etc

1.21 Protection of Adjoining Property

1.22 Protection of Existing Trees and Bushes

1.23 Construction of Foundations, Retaining Walls Etc Close to Existing Buildings, Public

Roads and Other structures

1.24 Removal of Water

1.25 Treasure Trove, Coins Etc

1.26 Restrict Nuisance of Dust and Noise

1.33 Temporary Lighting and Power

1.34 Water for the Works

1.1 Definitions

a) Employer Wherever the term Employer is used, it refers to Q 2

T H AO DI E N Mi x e d D e v el o p m e n t J S Co

b) Architect Wherever the term Architect is used, it refers to the

authorised representative of P&T Consultants (Vietnam) Co., Ltd as stated in the Articles of Agreement

c) Engineer Wherever the term Engineer is used, it refers to the

authorised representative of Tham&Wong Consultants (Vietnam) Co., Ltd

d) Mechanical Wherever the term Mechanical Engineer is used, it

refers to the authorised representative of JRP (Vietnam) Co., Ltd

g) Contractor The person or persons contracting for the Main Contract as described in these Contract Documents

including his or their heirs, executors or administrators h) Employer's

Representative and/or Project Manager

Wherever the term Employer's Representative and/or Project Manager is used, it refers to the authorized representative of TBA

i) Approved Approved in writing by the Architect and/or Employer’s Representative and/or Project Manager

j) Month The term ‘month’ shall be regarded as meaning a calendar month or otherwise indicated in the Conditions

These Specifications including any appendices are to

be read in conjunction with the Instructions to Tenderers, Drawings and Conditions of Contract Any conflict between any of the terms of these documents shall be referred to the Architect for clarification or decision except as otherwise provided for in the Conditions of Contract.Where stated in the documents, the Contractor shall comply not only with the latest Vietnam Standards (TCVN) but also with International Standards The International Standards referred to in this contract are as follows;

 BS (British Standard)

 BS EN ( British and European Standard)(Note: Where BS is indicated but has been subsequently replaced by the EN standard the latest EN or BS EN Standard shall apply)





ASTM ANSI

(American Society for Testing and Materials)

(American National Standard Institute)





ISO TCVN (Vietnam Standard)(International Organization for Standardization) Such references shall in every case be deemed to include the latest edition

or issue of such standards and bylaw including all revisions issued up to the date of the Invitation to Tender Any Standards given are to establish the minimum criteria with which the items/works are to conform

Wherever a dispute arises as the relevant standard to be adopted the more stringent standard shall apply unless otherwise approved in writing by the Architect upon the written application for waiver by the Contractor

1.3 Site of the Works

Vo Truong Toan Street, Thao Dien Ward, District 2, HCM City Vietnam

1.4 Contractor to Visit Site

The Contractor is advised to visit and inspect the site before tendering to ascertain for himself, the location, general site conditions, type of soil to be excavated, accessibility, storage space and any other conditions which may affect their tender

No claim for extra payment or extension of the Contract Completion Date will be allowed on the grounds of ignorance of the Conditions under which the work is

to be carried out

The Contractor shall accept the site as found on the date he is awarded the Contract and his own expense clear the site of any debris etc., which may have been left on the site

Any site investigation reports, foundation drawings of previous building or other information which may be made available to the Contractor are given in good faith as a guide only No responsibility can be taken for their accuracy or applicability over the whole site

1.5 Preliminary Investigations

The Main Contractor may at his own expense carry out any necessary preliminary investigations and make any probes or test borings he may require for his own

arrangements for the performance of such preliminary investigations with the Architect, and is to make good all works disturbed

Whether or not the Contractor undertakes investigatory works, the Contractor shall be deemed to be aware of and to accept all 'risks' arising out of any unfavorable or difficult sub-soil conditions, whether foreseeable or unforeseeable and the Contractor shall not be entitled to any extension of time or extra payment in compensation in respect thereof

1.6 Working Area

The working area is confined to the site as indicated on the drawings and the Contractor must keep his work people strictly within these limits

1.7 Time for Completion

Refer to the conditions of the contract

1.8 Sectional Completion

It is a requirement of the Contract that completed sections of the Works be handed over to the Employer as and when Temporary Occupation Permits/ Occupation Permits are issued by the Building Authority

The Main Contractor's tender is deemed to include for all extra costs which may arise from Sectional Completion described elsewhere, such as:

a) Any inconveniences which may occur or any loss or expenses caused by disturbances to the regular progress of the Works

b) Any extra costs arising from demolition and re-erection or re-siting of scaffolding, hoardings, storage areas, access routes etc to comply with the requirements of the Architect, the Employer and the Building Authority

c) Any additional cleaning costs incurred for those parts of the site remaining in the Main Contractor's possession to prevent any nuisance to the users of the areas handed over to the Employer

d) Any necessary temporary works to ensure no water enters the completed part of the building

e) Provision and maintenance of all temporary partitioning, dust screens etc to the approval of the Employer's Representative to protect the portions of the building so handed over and to comply with the requirements of B.L.D and F.S.D in respect of temporary partitions etc required to obtain Temporary Occupation Permits/Occupation Permits and removal of same when no longer required

f) Increased insurance premiums on remaining works arising from partial occupation

g) Any other loss or expense whatsoever whether contemplated or not arising from the Employer's taking possession of any part of parts of the Works

1.9 Practical Completion

The Contract works shall be deemed to be completed when every part thereof

issued his certificate accordingly The completion date shall not be assumed to

be the time of receipt of the Occupation Permit or the time of occupation of the whole or part of the buildings

1.10 Programme of Work

The Contractor must and immediately after the award of this Contract prepare and submit to the Architect a comprehensive Critical Path Programme showing how he intends to organize and carry out the works within the time fixed for completion

This programme shall show all the Contractor’s and his domestic SubContract works and the items of imported materials which may require long delivery time

The Architect reserves the right to examine, enquire and check the practical feasibility of the Critical Path Programme and, if necessary, make suggestions and alterations to it

If and when it is found that the works are not keeping abreast with the Critical Path Programme, the Contractor must, with the utmost diligence, endeavour to catch up on time

It is a Condition of Contract that any Nominated Sub-Contractors shall examine and signify in writing their acceptance to the details contained in the Critical Path Programme

The dates concerning the relationships of the Nominated Suppliers and Nominated Sub-Contractor's programme to the Contractor's programme in this Critical Path Programme are subject to adjustment by agreement between Architect, Consulting Engineers, Contractor, Nominated Sub-Contractors and Nominated Suppliers In this respect, the Contractor is advised that he is to up- date the Critical Path Programme each month and submit it to the Architect for his approval

In the event of the Contractor becoming liable to pay penalty or damages to the Employer, the Critical Path Programme will be used by the Architect as a basis for certifying the period of delay which has been caused by the Contractor and/or Nominated Sub-Contractor(s) and/or Nominated Suppliers

The Critical Path Programme is not intended to cover all building processes but must indicate most of the dates of handover of areas from the Contractor to the Nominated Sub-Contractor or from the Nominated Sub-Contractor to the Main Contractor

The handing over of a work area from the Contractor to a Nominated Sub- Contractor shall be construed to occur when, in the opinion of the Architect, the Contractor's progress is sufficient to allow the Nominated Sub-Contractor to properly commence work on a given floor or section of the building

1.12 Contractor's Claims for Extras and Time

Refer to the conditions of the contract

1.13 Working Hours, Rates of Wages Etc

The Contractor shall comply with any current legislation or regulations regarding working conditions, working hours, or rates of payment to Employees and accept the risk of any impending legislation or other conditions which alters any obligations or imposes new obligations

1.14 Overtime

Refer to the conditions of the contract

1.15 Notices and Fees

The Contractor shall comply with, and give notices required by, Government Regulations and any Public Services Company or Authority and pay all fees and charges legally demandable

The Contractor shall obtain, and pay fees and expenses required to obtain, all licences required by Government bodies and/or Authorities for the placing into operation any equipment, apparatus or system covered by this contract for and

on behalf of the Employer

1.16 Compliance with Regulations

Materials, workmanship and the works as a whole shall conform to or be of a higher standard than the minimum required by the latest edition of the Vietnam TCVN standards and Ministry of Construction regulations applicable to the Works, subject to Conditions of Contract

1.17 Site Safety Precautions

Refer to the conditions of the contract

1.18 Plant, Tools, Sheds, Hoardings, Etc

Refer to the conditions of the contract

1.19 Cartage of and Loading and Off-Loading of Materials

Refer to the conditions of the contract

1.20 Maintenance and Protection of Existing Roads, Footpaths, Steps Etc

Maintain all existing roads, footpaths, steps, etc and reinstate any damage caused by any reason whatsoever during the progress of the works including cleaning the public roads by hosing down as instructed by the Architect

and around the site are kept free from obstruction brought about by the work on this site and in no way shall he cause any hindrance to traffic or ancillary works either by his own vehicles, or by his workpeople, materials, etc

The Main Contractor shall be responsible for repairing damage to private streets and access roads if deterioration occurs during the Contract

The Contractor shall be responsible for carrying out all investigations and probes that may be requested in the event of any changes in the surrounding road level

It is to be noted by the Contractor that all works, in, under, over or alongside the surrounding public roads shall be done with the minimum of disruption to the public and shall be subject to consultation and co-ordination by the Contractor with the various Government and/or other Authorities concerned

The Contractor shall ensure that any existing services such as electric power, water, gas or drainage to adjacent properties and buildings which pass through the site of the works are maintained during the course of the works The Contractor shall be responsible for ascertaining the exact locations of any existing services within the site Any services that are encountered shall be diverted as necessary to the satisfaction of the relevant authority and/or adjacent owners and the Contractor shall pay all costs and charges of all diversions as necessary and/or adequate protection during the works Services and drains to adjoining properties are to be kept operational at all times

1.21 Protection of Adjoining Property

Refer to the Conditions of Contract

1.22 Protection of Existing Trees and Bushes

Refer to the conditions of the contract

1.23 Construction of Foundations, Retaining Walls Etc Close to Existing Buildings, Public

Roads and Other Structures

The Contractor shall be responsible for and undertake adequate precautionary measures to the satisfaction of the Architect and carefully execute all works (foundation works in particular), so as to safeguard the stability of the existing adjoining foundations and adjoining roadways and public transportation ways during the construction period The Contractor shall be responsible for paying for remedying any damage caused by his negligence in this regard

The Contractor shall provide all necessary additional planking, strutting and shoring to the sides of excavations adjacent to existing buildings, public roads and other structures and take special care to prevent subsidence or other damage

The Contractor shall employ an experienced and competent person full time on the site to supervise all excavation and foundation works

1.24 Removal of Water

The Contractor shall provide all pumping that may be required to keep the Works

whole of the water finding its way into the excavations and basement from rains, springs, or any other sources to below the level of the concreting works in progress

No accumulation of water will be permitted at any time during the execution of the Contract and the Contractor will be responsible for ensuring that mosquito breeding in stagnant water and the like does not occur during the currency of the Contract

1.25 Treasure Trove, Coins Etc

Deleted

1.26 Restrict Nuisance of Dust and Noise

Refer to the Conditions of Contract

1.29 Fire Protection

Refer to the Conditions of Contract

1.30 Workmen Living on Site

Refer to the Conditions of Contract

1.31 Visitors

Refer to the Conditions of Contract

1.32 Site Staff

Refer to the Conditions of Contract

1.33 Temporary Lighting and Power

Refer to the Conditions of Contract

1.34 Water for the Works

Refer to the Conditions of Contract

1.35 Drawings

A complete set of Construction Drawings and Specification(s) together with copies of all Variation Orders and additional drawings issued after the Date of Commencement shall be available on the site at all times for reference by the Architect

The drawings shall be stored in a neat and orderly manner by fixing them to sheets of hardboard, or using another suitable system approved by the Architect The term ‘Construction Drawing’ means either the contract drawings, later execution drawings/sketches, or the approved shop drawings

1.36 Dimensions

Figured dimensions are to be taken in preference to scaled in all cases Before commencing any work or ordering any materials the Contractor must verify all measurements of the building If any discrepancies are found they must be brought to the notice of the Architect immediately

1.37 Site Instructions

The Contractor shall ensure that all site instructions given to him or his foreman by the Architect, Engineer, or such other persons as are authorised as noted above, are entered in a Site Diary, recording a description of any such work ordered and shall obtain against each entry the initials of the Architect or such other authorised person on the day that such instructions are given

The Contractor shall allow such Diary to be inspected at all reasonable times when required by the Architect, the Engineers, the Quantity Surveyors, the Clerk- of-Works or the Employer's Representative

The Contractor shall ensure that all instructions issued by the Architect are communicated immediately to the site and to Nominated Sub-Contractors and Suppliers and he shall take instructions only from the Architect or persons authorised by the Architect in writing to them

The Resident Architect, Resident Engineer or Clerk-of-Works is empowered to stop all work and advise the Architect immediately, if such work is not in accordance with the Architect's Specifications, Drawings and Instructions

The Contractor shall send to the Architect, Engineer, Quantity Surveyor, Employer's Representative/ Project Manager and Clerk-of-Works a typed confirmation sheet for each instruction recorded in the Site Diary within three working days of such instruction being given

1.38 Setting Out

The Contractor shall allow for the cost of setting out the Works and shall submit for approval by the Architect the name and particulars of the person employed or

engaged by him for the setting out of all the Works under the Contract This person shall be competent and experienced and shall preferably possess an acceptable degree/diploma or other suitable qualification or experience appropriate to the work He shall be authorised to receive from the Architect or his Representative all survey data relevant to the Contract and shall be available

on site for this purpose when necessary

The Contractor must be responsible for the accuracy in and throughout the whole of the work, and he must rectify at his own expense all errors

The submission to and approval by the Architect of such Setting Out shall not relieve the Contractor of any of his duties or responsibilities under the Contract Any discrepancy which occurs between the measurement on site and any dimensions written on drawings shall immediately be brought to the attention of the Architect by the Contractor

The Contractor shall ensure that all necessary equipment and labour for setting out is available when required

The Contractor shall allow and maintain on site at all times equipment for his and the Architect's or Engineer's use in setting out the works

The Contractor shall be responsible for maintenance of such equipment and replacement when required The equipment, except consumable stores, shall revert to the Contractor at the end of the Contract

1.39 Samples

The quality of materials and articles supplied for any purpose are to be approved prior to their use in the Works The Contractor shall allow for each time at least 30 days for the approval process from the Architect after receiving of samples Any submission delay caused by the contractor shall not be accepted for extension

of time

Wherever practicable, samples are to be submitted for approval before bulk supplies are delivered to the site Samples, and any packing for same, are to be provided free-of-charge by the Contractor

The Contractor shall submit or provide for approval specimens of pavings, wall finishes, fair faced-concrete, etc before proceeding with the work

Should any material or article be rejected, it shall be removed from the site at the Contractor's expense

The submission to and approval by the Architect of any samples shall not relieve the Contractor of any of his duties or responsibilities under the Contract

The insertion of the name of any firm or proprietary article in the Specification is to

be read as an indication of the class or quality of materials and workmanship required; goods or workmanship of equal quality may be obtained from any other firm subject to the prior approval of the Architect

1.40 Testing of Materials

The Main Contractor shall carry out tests on all materials as required by the Architect These materials shall be tested at his own expense and he shall pay all charges in connection with tests ordered by the Architect to be carried out by others

All testing shall be carried out by an approved testing laboratory

1.43 Removal of Rubbish

All materials shall be stored on site and in the building in a neat and orderly manner All rubbish, disused shoring, crates, surplus materials, etc are to be removed from the site or surrounding areas as soon as is possible and at least once daily during the courses of the Contract so as to maintain unhindered access to any easy inspection of all work

1.44 Cleaning Up

The Main Contractor shall on completion of the works leave all roofs throughout watertight and clean, ease doors and windows, oil ironmongery, hand over keys, cut out cracks in plastering and make good, clean all wall linings and floors, clean all glass inside and out, touch up all painted and polished work and leave the whole of the premises and surrounding ground clean and sanitary to the satisfaction of the Architect

1.45 Insurances and Liabilities for Damage

Refer to the Conditions of Contract

1.46 As Built drawings

The Contractor shall submit 4 sets of as-built drawings in bound blueprints, one set

of transparency copy, and two (2) set of electronic (Autocad) copies to the Architect and the Employer after the completion of works

END OF SECTION

DIVISION A0-20: GENERAL REQUIREMENTS

CONTENTS

1 GENERAL

1.1 Project Particulars

1.2 General Description of the Works

1.3 Codes, Regulations, Standards and Technical Reference

4.3 Setting Out and Handling

4.4 Delivery, Storage and Handling

4.5 Protection of Products and Components

4.6 Suitability of Conditions at the Start of Works

4.7 Existing Services

4.8 Execution of the Works

4.9 Holes, Chases, Inserts and Fixings

4.10 Protection of Works

4.11 Defective Work

4.12 Cleaning Up

5 VERIFICATION AND SUBMISSIONS

5.1 Records and Certificates

5.2 Tests to Establish Acceptability of Works

5.3 Trial Panels, Test Samples, Mockups

1 GENERAL

This section sets out the general requirements for carrying out any works for the project and shall be read in conjunction with all relevant work sections and other contract documents

This document is supplementary to the General Requirements Section of the NPQS

and sets out Project Specific Data (PSD) in the same clause headings as in the NPQS All modifications and additions noted in this document take precedence over clauses noted in the NPQS

The following words shall have the meaning assigned to them:

Architect P&T Consultants

C&S Engineer Tham & Wong Consultants

M&E Engineer JRP Consultants

Quantity Surveyor Structon Group

1.1.3 Superintending Officer (SO)

SO shall mean the Architect, the Engineer or their representative on site, or as designated by the Employer

1.2 General Description of the Works

Refer to the PSD for the general description of work requirements for the project

The Works for the project is generally described below:

1.3 Codes, Regulations, Standards and Technical Reference

1.3.1 Regulations

The whole of the Works and material are to be in accordance with the Building Control Regulations, other regulations as set out by the authorities having jurisdiction over the works, and the relevant bylaws unless otherwise stated

Ensure that the requirements in the Specification are strictly adhered to when carrying out the Works, unless otherwise directed

1.3.2 Standards and Codes of Practices

Unless otherwise agreed by the SO, ensure all of the Works comply with the relevant requirements of the Standards and Codes listed below or referenced in the body of the Specification Alternative Standards and Codes may be proposed for approval by the SO, provided it can be demonstrated that the alternative Standards and Codes comply with the requirements of the standards specified All Standards and Codes quoted are the current version, unless specific year references are noted

In the event that the Standards or Codes are partially superseded or become obsolete, refer to the latest edition or the approved substitution for the relevant clauses

In case of conflicting requirements between the Vietnam codes, refer to the SO for resolution Assume priority of precedence of different standards and codes in descending order as follows:

a Vietnam Codes and Standards

b BS or BS EN

c Singapore Codes SS and SS CP

d SS ISO or ISO

e Other standards such as ASTM (US), AS (Australia) and DIN (German), as

agreed with the SO

1.3.3 Technical Reference

Where specified, be guided by the principles and methods as set out in the technical reference when carrying out the works Alternative methods and principles may be proposed in lieu of the referenced document, subject to SO’s acceptance, if it can

be demonstrated that the specified quality or performance of the works can be achieved

1.4 Work Preambles

1.4.1 Ambiguity

Before commencing any works, obtain clarification or instructions in relation to any discrepancy or ambiguity, which is discovered within and between the Specification Work sections, and/or other contract documents issued by the various parties

1.4.2 Approved Sub-contractors

All sub-contractors for the works are subject to the SO’s acceptance At the time of tender, submit the list of subcontractors intended to be engaged for the works Submit with the list, details such as the relevant track records of the firms, the qualification of the personnel and details of equipment to be engaged for the works

1.4.3 Licenses, Permits and Liaison with the Authorities

Be responsible to initiate the application for all necessary licenses, permits, etc and to carry out all necessary liaison with the Government Departments and Statutory Boards, etc whenever necessary, for the satisfactory completion of the Works

Be responsible for ensuring that these licenses and permits are obtained in good time

1.4.4 Safety Regulations and Temporary Works

Strictly observe all necessary safety requirements to comply with the provision of the Factories Act 1973 and The Factories (Building Operation and Works of Engineering Construction) Regulations 1985, and any other requirements from the authorities having jurisdiction over the works

1.4.5 Safeguarding Properties Adjacent to Site

Propose and adopt site procedures and methods of working such as to limit to a minimum any disturbance and vibration to the buildings around the Site

Identify and implement protective measures necessary to safeguard the adjacent properties prior to carrying out the works

Indemnify the Employer in accordance with contract conditions against all claims for loss and/or damage to the adjoining properties by reason of the carrying out of the works or by reason of insufficiency of precautionary measures

1.4.6 Site Supervision

Provide personnel with adequate and relevant experience to SO’s acceptance, to supervise the Work Submit the CV of the superviser(s) to SO where directed

The maintenance manual and logbook are to describe the procedures for the satisfactory long-term care and regular maintenance of the materials and components identified in the work sections, to be carried out by the building owners Include the following information, where appropriate:

a An outline description of the installation and detailed description of specific items with product names, types, serial numbers, etc

b The name, address and telephone number of each supplier, fabricator, finisher, installer etc involved in the Works

c Recommendation on maintenance periods and planned preventive maintenance procedures

d Copies of manufactures ‘warranties or guarantees, service manual, brochures, recommendation, etc

e Copies of test and approval certificates

f One original copy of documents showing “As Built” information and the like, relevant to the installation Submit the “As-Built” information in soft copies where directed by the SO The Contractor shall compile one single set of the information from various sub-contractors for submission

g Compilation of a list of parts to be replaced periodically and the names and contacts of the suppliers

h Realignment and adjustment instructions where relevant

i Procedures for dismantling and reassembling

j Details of finishes, including colour and required maintenance

k Logbook pages set up for recording the times of performance of the above procedures, sufficient in number to receive the entries for a minimum of ten years

or otherwise directed Show examples of typical entries by recording any maintenance procedures (such as cleaning) performed during the contract and

or defects liability periods

The form of the maintenance manual and logbook are to be in A4 size, printed or typed on durable printing paper, each page consecutively numbered, neatly bound

in durable vinyl or similar hard cover, and permanently labelled with the project name and date of issue The Contractor shall compile one single set of the information from various sub-contractors for submission

1.4.9 Testing Authority

When tests and checks are called for in the specifications, engage a suitably equipped organisation or laboratory accredited under the Singapore Laboratory Accreditation Scheme (SINGLAS) and to SO’s acceptance, to carry out the tests and checks required

1.4.10 Quality Control Plan

Prepare and submit a quality control plan for SO’s acceptance Include a set of procedures/action to:

Ensure the understanding of the project brief

Ensure a number of checks and verification are put in place in the work process to enable the delivery of the brief

Ensure the right person is employed to carry out the works

Ensure the works are carried out based on proper operating instructions

Ensure feedback and poor/defective works is picked up and attended to, and corrective/preventive action is in place

Ensure prior approvals are obtained from SO for any deviations from the specifications before works commence

Ensure documents of all tests and quality checks as specified are properly done and kept as records

1.5 Abbreviations and Definitions

1.5.1 Abbreviations

The following abbreviations are applicable when referred to in the specifications:

AS Australian Standard

ASTM American Society for Testing and Materials

ASHRAE American Society of Heating, Refrigerating and Air-

Conditioning Engineers

BMS Building Management System

BMU Building Maintenance Unit (Also known as Gondola system,

Façade Maintenance Unit)

BS British Standard

CFC Chlorofluorocarbon

ETTV Equivalent thermal transfer value

HCFC Hydro-chloro-fluoro-carbon

OH&S Occupational Health and Safely

OTTV Overall thermal transfer value

PE Professional Engineer

PSD Project Specific Data

PVC Polyvinylchloride

SAA Standards Association of Australia

SS and SSCP Singapore Standard and Code of Practice

MSDS Material Safely Data Sheets

M&E Mechanical and Electrical

1.5.2 Definitions

Wherever the following terms are used they shall have the following meaning:

“The Works” The whole of the Works envisaged by the Contract including

the works of the Local Authority and Public Undertakings unless specifically stated otherwise

“Directed” Directed by the SO

“Inspected” Inspected by the SO

“Submit” or Submitted to or submit to the SO for review and acceptance

“Acceptance” and “Approval” are used within the following limitation:

No approval or acceptance by the SO shall relieve the Contractor of any responsibility to achieve the specified quality and performance of the work under the Contract

Any approval given in respect to samples of materials, workmanship or methods of construction submitted in accordance with the requirements of the Specification, are not to be interpreted as denoting any degree of satisfaction with the materials used in the Works or in the execution of the Works

3 MATERIALS

3.1 Materials Generally

Products are to be new unless otherwise specified All materials are to be supplied clean, undamaged and in good condition ready to be used for the Works

For products with a limited shelf life, ensure no parts or whole are expired

Where a choice of manufacturer or source is allowed for any particular product, supply the whole quantity required as the same type and from the same manufacture and/or source unless otherwise approved Produce written evidence of source of supply when requested Ensure that the whole quantity of each product supplied is of

consistent kind, size, quality and overall appearance

Ancillary products and accessories are to be of a type recommended by the main product manufacturer, unless otherwise specified

3.2 Ordering of Materials

Unless otherwise directed, do not place orders for materials before the sources and samples of the materials have been approved and the results of any preliminary tests required by the Specification have been accepted

3.3 Certificates for Materials

All materials and products are to be manufactured and tested in accordance with the appropriate Standard or as specified All materials and products delivered to the site are to bear the manufacturer’s name, brand name or any other data required to verify compliance with the specified requirements Where appropriate, provide certificates represents

Where certificates of manufacture or tests are not available for materials proposed for use in the Works, carry out independent testing to determine compliance with the specified requirements where directed by the SO

Do not permit the storage of materials, components or equipment on new or partially completed work without prior approval

Ensure that all works are carried out:

In accordance with the specified methods and procedures where applicable;

In accordance with good building practice;

In accordance with the manufacturers’ instructions where applicable

By suitably qualified and experienced personnel

4.2 Co-Ordination of Drawings

Check all Drawings and schedules to ensure that there are sufficient information to carry out the works and that all the instructions, drawings and schedules provide compatible information on the works to be carried out

In the event of any discrepancy being found between the contract drawings and/or schedules, and other contract documents, notify the SO immediately for resolution, the SO’s decision shall be final

4.3 Setting Out and Levels

4.3.1 Accuracy

Arrange the setting out, erection, juxtaposition of components and application of finishes in such manner as to ensure:

Compliance with specified tolerances

Satisfactory fit at junctions

No visually unacceptable changes in plane, line or level,

True, regular finished appearance

4.3.2 Levels

Site levels, either spot or contour, and all other levels shown in the drawings are established with respect to the datum of 100.000 m at mean sea level Check and verify all existing and proposed levels as indicated in the drawings, highlight and resolve any discrepancy prior to the commencement of the works

4.4 Delivery, Storage and Handling

Deliver materials and products to the site with labels showing brand name, product name and manufacturer’s batch number

Store materials in accordance with manufacturer’s recommendations Use in order of delivery and before expiration of the shelf life date

4.5 Protection of Products and Components

Take measures to prevent over-stressing, distortion and other damage to the products Keep products and components clean and free from contamination Prevent staining, chipping, scratching or other disfigurement, particularly of products exposed to view

in the finished work

Keep dry to prevent premature setting, moisture movement and similar defects Where appropriate store off the ground and allow free air movement between stored products

Protect adequately from rain, damp, sun and other elements as appropriate Ensure that products are at a suitable temperature and moisture content at time of use

Ensure that sheds and covers are of ample size, in good weatherproof condition and well secured

Keep different types and grades of product separately and adequately identified Keep products in their original wrappings, packings or containers until immediately before they are used Wherever possible, retain protective wrappings after fixing until shortly before handing over to the owners

Ensure that protective measures are fully compatible with and not prejudicial to the products and materials

4.6 Suitability of Conditions at the Start of Works

Provide all trades with necessary details of related types of work Before starting each type of work, ensure that:

Previous work is appropriately complete, in accordance with the project documents,

to a suitable standard and in a suitable condition to receive the new work

All necessary preparatory work has been carried out, including provision for services, openings, supports, fixings, damp proofing, priming and sealing

The environmental conditions are suitable

4.7 Existing Services

Take due care to safeguard all existing that will be affected by the works

Where existing services are required to be terminated or diverted for the execution of the works, give the necessary notices to the Authority and the owner Co-ordinate and arrange for the works to be carried out

4.7.1 Statutory requirements

Comply with all the requirements of the various Statutory Authorities and Government Departments in respect of the existing services at and around the vicinity of the Site, whether underground, on or above ground, or at the site peripherals

Terminate or divert all relevant existing services as required by the authorities before work begins

4.7.2 Information on services

Obtain information in relation to existing services from the SO

Verify actual sizes and locations of all services with the Public and Statutory

Authorities and make enquiries as to the presence and location of any privately owned land drains and services Locate, identify and mark on site before commencing work

Arrange with and offer the Authorities all necessary assistance in ensuring timely diversion, disconnection, termination or capping off of the services

4.7.2.1 Detection of services located on site

Locate and mark the position of services affected by the work

Conduct detection of suspected below ground services Propose suitable method for acceptance by the SO

Mark below ground services with signboards giving type and depth and inform the Authorities concerned of any such services encountered on site

4.7.3 Drains in Use

Protect drains, manholes, gullies, vent pipes and fittings still in use and ensure that they are kept free of debris at all times Make good any damage arising from the Works and leave clean and in working order at completion

4.7.4 Bypass Connections

Provide as necessary to maintain continuity of services to occupied areas of the site and adjoining properties Give a minimum 72 hour notice to occupiers if shutdown is necessary during changeover

4.7.5 Services to Remain

Notify the SO and the authorities or owner of any damage Make all arrangements for repair to the satisfaction of the SO, the authorities or owner

4.8 Execution of the Works

4.8.1 Methods

Carry out the works in accordance with accepted methods and equipment

4.8.2 Allowance for Movements

Ensure that the performance, appearance and proper functioning of the Works are not affected by any movements, settlement, deflection, expansion or contraction that can be reasonably expected to occur in the building or the Works

Where applicable, form joints between the works and adjacent works to accommodate possible movements, settlement, deflection, expansion or contraction between the works

4.8.3 Application/Installation of Products and Components

Use of fix each product and components in accordance with manufacturer’s recommendations Inform the SO if these conflict with any other specified requirement

Provide suitable packings at screwed and bolted fixings to take up tolerances and prevent distortion

Adjust the location and fixing of components and products so that joints which are opened to view are even and regular

Ensure that all moving parts operate properly and freely Do not cut, grind or plane pre-finished components and products to remedy binding or poor fit without approval

4.9 Holes, Chases, Inserts and Fixings

Obtain approval for the size and positions of any hole, chase, insert or fixing required before the related work begins Unless otherwise agreed, form all holes and chases and build in any inserts of fixings at the time of construction Do not cut or drill any part

of the works without approval

Do not cast any conduits, recesses, pipes etc inside structural columns, walls, beams

or slabs unless otherwise agreed

All work classified as defective are to be cut out and removed from the works and replaced or otherwise dealt with in accordance with the Conditions of Contract

Propose and carry out suitable remedial measures to SO’s satisfaction

The extent and nature of any measures required as a result of defective work are to

be determined by the SO

4.12 Cleaning Up

Remove all protection, surplus materials, empty containers, rags, dirt and other debris Remove daubs and spatters from coatings and materials, and leave surfaces clean

5 VERIFICATION AND SUBMISSIONS

5.1 Records and Certificates

Unless otherwise directed, maintain 3 copies of all inspections and tests performed to substantiate conformity with the Contract Specification, including those carried out

by Sub-Contractors and/or third party testing agencies and manufacturer’s or suppliers’ certificates of test

Retain one copy of these records on Site and make available for inspection at any time Submit the other two copies to the SO and the Employer respectively and progressively On completion of the Works, hand over all records to the SO unless otherwise agreed

Submit to the SO without delay, any records which indicate that the work of materials not complying with the specification, in order that proposals for any rectification may

be assessed and carried out in good time

5.2 Tests to Establish Acceptability of Works

In the event of failure to comply with the requirements of the Specification, propose suitable tests to establish the acceptability of the Works and be responsible for any consequential costs and delays

The results of such tests will not necessarily be accepted as proof of compliance with the Specification

5.3 Trial Panels, Test Samples, Mockups

Provide all materials or components and erect or assemble, to the satisfaction of the

SO, all trial panels, test samples, mockups required by the specification or as directed

by the SO Adequately protect and maintain such construction and use as benchmarks for acceptable quality of the works Upon completion of the works, demolish and remove such works from the site as directed

END OF SECTION

DIVISION A1-20: WINDOWS

3 MATERIALS AND COMPONENTS

3.1 Types of Window Systems

3.2 Glazing

3.3 Aluminium Components

3.4 Carbon Steel Components

3.5 Stainless Steel Components

3.6 Timber

3.7 Frame Material Compatibility

3.8 Fixings and Fasteners

4.3 Protection and Cleaning

5.0 VERIFICATION AND SUBMISSION

5.1 Submissions

5.2 Samples and Mock-ups

5.3 Inspections

5.4 Tests

1.2 Related Sections

Read this work section in conjunction with the relevant requirements of the other work sections including the following:

A1-80-1 External Render

A3-80-3 External Painting and Coating

A3-40 External Metalwork

A3-50 External Timberwork

1.3 Standards

Unless otherwise agreed by the SO, ensure all of the Works comply with the relevant requirements of the Standards and Codes listed below or referenced in the body of the Specification Alternative Standards and Codes may be proposed for approval

by the SO, provided it can be demonstrated that the alternative Standards and Codes comply with the requirements of the standards specified All Standards and Codes quoted are the current version, unless specific year references are noted

Vietnam Standards

TCVN 7451:2004 Windows and doors made from unplasticized polyvinyl

chloride (U-PVC) extruded hollow profiles – Specifications

TCVN 7452-1-6:2004 Windows and doors – Test method

TCVN 7364:2004 Glass in building - Laminated glass and laminated

safety glass TCVN 7455:2004 Glass in building − Thermally toughened safety glass

Other Standards

BS 6262 Code of practice for glazing for buildings

BS 6213 Guide to the selection of constructional sealants

BS 5889 Specification for one-part gun grade silicone-based

sealants

BS 8118 Structural use of aluminium

BS 6339-2 Loading for buildings Code of practice for wind loads

BS 5250 Code of practice for control of condensation in

buildings

BS EN ISO1461 Hot dip galvanized coatings on fabricated iron and

steel articles - specifications and test methods

BS EN ISO Protection against corrosion of iron and steel in

structures zinc and aluminium coatings – guidelines

BS 6496 14713 Specification for powder organic coatings for

application and stoving to aluminium alloy extrusions, sheet and preformed sections for external architectural purposes

BS 6497 Specification for powder organic coatings for

application and stoving to dip galvanized rolled steel sections and preformed steel sheet for windows and associated external architectural purposes

hot-BS 5713 Specification for hermetically sealed flat double

glazing units

BS EN 573-3 Aluminium and aluminium alloys - chemical

composition and form of wrought products Chemical composition

BS 1161 Specification for aluminium alloy sections for structural

purposes

PD 6484 Commentary on corrosion at bimetallic contacts and

its alleviation

BS 8200 Design of non-loadbearing vertical enclosures

SS 212 Specification for Aluminium Alloy Windows

SS 341.1989 Safety glazing materials for use buildings Human

impact considerations ASTM C1036 Standard specification for flat glass

ASTM C1048 Standard specification for heat-treated fiat glass kind

HS, kind FT coated and uncoated glass ASTM C1172 Standard specification for laminated architectural flat

glass

1.4 Trade Preamble

1.4.1.1 Develop all necessary details for the fabrication and installation of the

windows, and to meet with the performance requirements as set out in clause 2.1 below; Details to develop may include shape and sizing of components, accessories and connections to the building

1.4.1.2 Design for the appropriate structural support for the window system

including the panes, frame and connections Where required as indicated

in the PSD, engage a Professional Engineer PE (structural) to verify the

submissions

1.4.1.3 Develop waterproof details for the junction between the windows and the

walls

1.4.1.4 Propose names of manufacturers and products for components and

accessories when called for

1.4.1.5 Provide structural calculations for framing materials and glass to verify

compliance with appropriate Regulations and standards All such calculations shall be verified by registered third party consultant

1.4.2 Co-ordination with Other Works

Co-ordinate the window installation works, particularly the interfaces with the following work packages and trades:

a External walls and finishes

b Internal walls and finishes

1.4.3 Provide Spare Materials

Deliver to site in strong protective packages marked for identification, and store where directed, components and materials for future replacement and repair Refer

1.4.6 Quality Control Plan

Refer to the PSD for any requirement to provide a quality control plan

i through openable windows: not more than 2.0 cu m/hr per metre length

of the air seal around the perimeter of the opening frames

ii through fixed windows and spandrels: not more than 1.5 cu m/hr Per square metre

iii there must not be any concentrated airflow through the windows or at any interfaces

b Prevent leakage of water into the interior of the building from the outer face of the assembly, resulting from wind pressure, gravity, surface tension, or capillary action with wind and precipitation likely to be experienced, up to 600 Pa static pressure for any period of 5 minutes, and 600 Pa dynamic pressure for 3 second periods at random intervals

c Prevent water entering into those parts of the windows that would be adversely affected by the presence of water

d Where the system requires water to appear on the inside surfaces of the window, such as in a track of a sliding door or window, any water must drain unassisted within 10 minutes

e Maintain such weather-tightness under reasonably anticipated imposed loads and thermal, structural or other movements

Account for additional requirement for weather resistance as indicated in the PSD 2.1.1.2 Thermal Performance and Solar Gain

Achieve at least the performance levels as indicated in the PSD

Resist cracking to glass caused by thermal stress

Expansion and contraction of the window frames must not cause unacceptable noise or induce significant stresses to any components

2.1.2 Resistance to Structural Loading

2.1.2.1 Gravity Loading

Support the self-weight of the windows and transmit this weight safely back to the supporting structure without overstressing or permanently deforming any components

Transmit all the design loads to the building structure via the anchors as designed with

an adequate margin of safety appropriate to each material and product

2.1.2.2 Wind Loading

Withstand loading from inside and outside the building determined in accordance with BS CP3 using a basic wind speed of 35m/s and terrain category suitable for the site Transmit these loads safely back to the supporting structure without Overstressing

or permanently deforming any components Take account of all applicable local pressure coefficients

Sustain no permanent damage to framing members, glazing or anchors when tested

at both positive and negative applications of the design wind loads multiplied by a factor of 1.5 Framing members must not be buckled Glazing, glazing beads and decorative capping pieces must remain securely held and gaskets must not be displaced

Permanent deformation to framing members is not to exceed 1/500 of the span measured between points of attachment to the structure after loading

The calculated stress of all combined forces is not to exceed 1.33 times the

appropriate maximum permissible stress in the short term

Design stays, locks, operating mechanisms, actuator motors etc so that:

a windows are not sucked or blown open when closed

b stays or hinges not torn off if window is partly opened

c window to be closeable under full design load

2.1.2.3 Impact Loading

Framing must satisfy the requirements of Tables 3 and 4 of BS 8200.1985 "Design of non-Ioad bearing vertical enclosures" for category B in table 2, the maximum visually acceptable dent in the metal surface is 10mm in diameter and 3mm in depth

2.1.2.4 Maintenance Loading

Sustain and safely transmit a static load of 500 N applied horizontally through a square

of 100 mm side on any framing in vertical or near vertical windows

2.1.2.5 Barrier Loading

For windows acting as barrier sustain and safely transmit static horizontal load in accordance with schedule 1 of the Building control regulations

2.1.2.6 Loading from Temporary Conditions

Sustain and safely transmit any temporary loading that may arise from lifting, storing, transporting, hoisting and installing the windows

2.1.2.7 Window Framing Deflection Limits

Achieve deflection limits, as follows under the design load for serviceability:

a Framing members - at both positive and negative applications, the maximum frontal deflection must not exceed 1/240 of the span of the member measured between points of attachment to the building, or 20 mm, whichever is the lesser

b Framing members supporting single glazing - the maximum deflection must not exceed 1/125 of their length measured along the pane edge

c Framing members supporting double glazing units - the maximum deflection must not exceed 1/175 of their length measured along the unit edge, or 15 mm, whichever is the lesser, or more restrictive limits if set by the unit manufacturer

d The vertical deflection of framing members and transoms, which support the weight of glazed panels, must not exceed 1/250 of their length

e Surfaces (metal panel, glass, etc.) that are horizontal or inclined at less than 15° must not deflect under self-weight by more than L/360

f Water must not pond on any part of the window system

g All framing members are to recover fully from the above deflections when the loads are removed

2.1.2.8 Locked in Stresses

Avoid the introduction of locked-in stresses that may be detrimental to the performance of the windows

2.1.2.9 Vibration and Repetitive Loading

Resist loosening of anchors and other components due to the effects of vibrations or cyclic effects of load, deflections and thermal expansion

2.1.2.10 Anchors

Take account of any reduction in safe working loads in fixings due to their spacing, location in areas of tension, near edges or proximity to cast in inserts/existing fixings, or thickness of shims

2.1.2.11 Structural Design

Carry out the design in accordance with the following codes:

a SS 212 for Aluminium Alloy Windows

b BS 6262 for Glazing

c BS 8118 for Aluminium

d BS 5950 for Steelwork

e BS CP 7 for Timber

2.1.3 Movement and Tolerance to Structure

2.1.3.1 Structural Movement and Movement Between Works by Others

Ensure that performance, appearance and proper functioning of the window system

is not affected by any movements, settlement, deflection, expansion or contraction, which can be expected to occur in the building or the construction process

Junctions between the window systems and adjacent work by others are to be formed to accommodate possible structural deflections or movement in that adjacent element without distortion to the works, or disintegration of joints between the works

Refer to the PSD for design movements and deflections to account for

2.1.3.2 Structure Tolerances

Accommodate tolerances on structure and window openings as indicated in the PSD,

2.1.4 Acoustic and Noise Performance

2.1.4.1 Acoustic Performance

Ensure that the window, its seals, baffles and flashings that form part of acoustic separators achieve the following STL values as indicated in the PSD against noise break-in

Install insulation / sealant to eliminate noise break in through air gaps around windows 2.1.4.2 Noise

Minimise drumming, creaking, rattling, whistling and any other noises from the windows audible to occupants

2.1.5 Fire and Smoke Performance

2.1.5.1 Non-Combustible Materials

Ensure materials in the windows do not readily support combustion or add significantly

to the fire load or give off toxic fumes

2.1.5.2 Surface Spread of Flame and Fire Propagation

Achieve Class O classification when tested in accordance with BS 476: Parts 6 & 7 internally and externally

2.1.5.3 Fire and Smoke Stopping

Meet the requirements for BOA and for separation of fire and smoke compartments It

is noted that where the window does not bridge the edge of a floor or the wall separating two compartments there are no requirements

2.1.6 Functionality

2.1.6.1 Appearance

a Achieve the geometry presented in the drawings and schedules

b Achieve colours and appearances as per samples approved by the SO

2.1.6.2 Operability

a Meet the recommendations of SS 212 and BS 8213-1 in respect of reach distances

to ensure the safe operation of opening vents by users

b Meet the requirements for force required to operate the sash of a window set out

in SS212 and BS 6375-2, for the type(s) of windows concerned

2.1.7.1 Design Life of Components

Achieve the following minimum design life requirements:

a IGU's 10 years

b PVF2 coating 15 years

c All metal components 10 years

d All gaskets 10 years

e Hinges, stays, locks and other ironmongery - 50,000 cycles

Identify materials and components which under normal service conditions cannot meet the specified design life and allow for their monitoring and replacement

Detail the components such as to permit removal and replacement of individual assemblies without affecting adjacent assemblies or supporting framework

3 MATERIALS AND COMPONENTS

3.1 Types of Window Systems

Refer to the PSD for the types of window systems and component requirements for this project

3.2 Glazing

3.2.1 General

All glass must:

a Comply with the requirements of TCVN 7451 or SS 341 clause 3.2

b Be clean cut, without significant edge faults (including feathered edges, shells or other imperfections) and free from bubbles, inclusions, cracks, rippling, dimples, sleeks or other defects

c Be cut to accurate sizes in the factory

d Be assessed for optical and visual faults as described in BS EN 572-2 Spot faults to

be no worse than category C Ensure there are no linear/extended faults Optical faults to be within the limits set in BS EN 572-2

e Have no local defects producing irregular reflections

3.2.2 Lamination

Laminated panes must:

a Comply with TCVN 7451 or SS 341

b Have PVB interlayer complying with BS 6206 Class A

c Have edge steps less than 0.5mm in toughened or heat-treated glass

d Bear identification marks indicating its nature and processor

Protect the interlayer material from the effects of moisture absorption in service including clouding, shrinking back, degassing and delamination

Ensure that the interlayer is compatible with glazing sealants

3.2.3 Heat Strengthened Glass

Heat strengthened glass must:

a Comply with the requirements of TCVN 7451 or SS 341 clause 3.2

b Be tempered on a roller hearth furnace eliminating tong marks

c Conform to the following requirements in the horizontal heat treatment

process:

i Maximum bow 0.2%

ii Roller wave: All thicknesses 0.15mm depth maximum between peaks and troughs

iii Edge dip: 0.25mm maximum

d Have identification marks indicating its nature and processor

3.2.4 Toughened Glass

Toughened glass must:

a Comply with TCVN 7451 or SS 341

b Be tempered on a roller hearth furnace eliminating tong marks

c Conform to the following requirements in the horizontal toughening process:

i Maximum bow: 0.2%

ii Roller wave: All thicknesses 0.15mm depth maximum between peaks and troughs

iii Edge dip: 0.25mm maximum

d Have identification marks indicating its nature and processor Location to be agreed with the SO

Heat soak test all toughened glass for a minimum of 8 hours at 290 C, in accordance with DIN 18516 Part 4, to convert all nickel sulphide inclusions greater than 40 urn in diameter from the to the Ii phase so that the glass will fracture in the test After the test the probability of failure in service should be less than one in 130 tonnes The manufacturer must, upon request, show by statistical analysis of test data that the probability of failure is not greater than the value quoted above

3.2.5 Heat Treatment

Prior to heat treatment:

a Grind flat edges to a small arris

b Dubb corners

c Grind out small shells and/or chips

d Maximum chip/shell diameter 2 mm

Not more than four randomly placed chip/shells in any single pane of glass

3.2.6 Insulating Glazed Units

Insulating glazing units must have:

a Hermetically sealed complying with BS 5713

b Mechanically applied primary polyisobutylene seal located between glass and spacer providing a continuous vapour proof barrier with a minimum width of 2mm and a secondary two part silicone sealant extending around the perimeter of the unit

c Aluminium alloy spacers with a natural or black finish and sufficient rigidity for their purpose, which are formed to accommodate seals and contain desiccant

d All breather tubes nipped closed prior to installation

e All corners and joints fabricated to ensure a vapour tight construction

3.2.7 Low Emissivity Coating

Low emissivity coating must have:

a Emissivity less than 0.2

b Nominally neutral in colour and uniform in tone, hue, colour, texture, pattern and opacity

c Consistent appearance to the glazed units

3.3 Aluminium Components