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TitleCONQUAS 8th Edition
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Document Text Contents
Page 1

CONQUAS
®


THE BCA CONSTRUCTION QUALITY ASSESSMENT SYSTEM

Page 2

CONQUAS®



Effective date: 1st Dec 2012 i

















CONQUAS®



THE BCA
CONSTRUCTION QUALITY ASSESSMENT SYSTEM

Page 34

Appendix 1b

Effective date: 1st Dec 2012 30




Item*



Standards


4 Corrosion and fire

protection



4a Thickness of coating 1) Average thickness of the coating or the protective layer

must not be less than specified

4b Condition 1) No visible damages

2) No spalling of coating or protective layer from structural

steel members



5 Welding test reports# 1) Reports for all critical welding joints from the specified

contract requirements must be submitted

2) Test reports must comply with the acceptable criteria and

must be endorsed by




# For test records, the following table would be used to determine the points awarded:


Points awarded Percentage of elements checked which does not
comply 20 0%

15 0%<x5%
10 5%<x10%
5 10%<x15%
0 x>15%


* An item is deemed to have failed if any one of the standards is not met.

Page 35

Appendix 1c

Effective date: 1st Dec 2012 31

QUALITY STANDARDS FOR STRUCTURAL WORKS

Part 3: Pre-stressed Concrete



Item*



Standards


1 Condition of tendons &

anchorages
1) All pre-stressing strands and wires should comply with the

specified standards and requirements and be free from
loose rust, oil, tar, paint and any foreign objects


2) All tendon anchorage are to comply with the specified

standards and protected from corrosion

Thread parts to be greased wrapped and tapped holes

protected until use

2 Installation of sheathing 1) Sheathing properly secured and protected and free from

damage or puncture

2) Sheathing profile according to drawings throughout the

length with position tolerance: 5mm

3) Splice to sheathing shall be mortar tight

4) Air vents or grout tubes provided according to the drawing

3 Stressing & Grouting

process
1) Tendon ducts clean and free from foreign objects and

tendon free moving in the duct

2) Strands stressed to the final pressure / elongation within

the specific % accuracy of the stipulated value

3) All grouting operations of the tendons must be smooth and

achieved without need to flush out in the first grouting

4 Debonding 1) Open ends of debond tubes over the debond length of

strands sealed

2) Debond lengths according to the drawings

3) Debonding materials not punctured or damaged



* An item is deemed to have failed if any one of the standards is not met.

Page 67

Effective date: 1st Dec 2012 63

Appendix 4


Defects Grouping Guide for Assessment of Internal Finishes





Element Defects Grouping Defects Description

Floor Finishing Stains, Painting / Coating Defects, Tonality, Patchy & Roughness

Wall Alignment & Evenness Alignment, Unevenness, Squareness

Crack & Damages Crack, Chipping, Dent, Scratches

Hollowness / Delamination

Jointing Joints, Pointing

Ceiling Finishing Stains, Painting / Coating Defects, Patchy

Alignment & Evenness

Crack & Damages Crack, Chipping, Dent, Scratches

Roughness

Jointing Joints, Pointing

Door Joints & Gap Joints, Gap etc too big, Inconsistent, Improper Seal

Window Alignment & Evenness

Component Material & Damages Crack, Chipping, Dent, Scratches, Defects, Finishing, Tonality

M&E Fittings Functionality Movement, Functionality, cannot be opened or closed properly,
Loose

Accessories Defects Missing items, Improper Fixing, Stains, Corrosion, Other damages

Page 68

Effective date: 1st Dec 2012 64

Appendix 5


BUILDING GROUPING GUIDE


CAT A CAT B CAT C CAT D
Commercial, Industrial, Private Housing, Public Housing Landed Housing

Institution & others Commercial, Institution,
Industrial & others

In General : All types In General : All types HDB Public Housing Bungalow

of building that has a of building without Semi-Detached

central cooling system central cooling system Terrace House

Cluster Housing

e.g. e.g.

Bank Condominium

Office Building Apartments

Shopping Complex School

Hotel Factory

Supermarket Warehouse

Airport

Hospital Mixed Development

University without Central Cooling

Regional Library

Conference Hall

Arts and Cultural Centre



Mixed Development

with Central Cooling


Note: The above is only meant to be a general guide in determining the Category of project. The
actual grouping might vary depending on the project details in the application. For instance, a
mixed development building project, ie, one with commercial and residential components in the
development, where the residential GFA > 50% of the total GFA, is categorized as category B
(housing).

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