Specification for Building Works

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Specification forSpecification for BuildingBuilding

WorksWorksNurul Hidayah BteYahya

Siti Fatiah Bt. Ibrahim

Amirul Naim B. Md Zulkifli

Afifi Bin BaharomAhmad Fitri Bin Salehuddin

Ahmad Nazri Bin Harun

Dahlia Binti Ismail

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What is Specification of Buildings?What is Specification of Buildings?

From AIA A201-2007,Specifications merely

that portion of the Contract Documentsconsisting of the written requirements for the materials,equipment, systems, standards and workmanship for theWork and performance of the related services.

In Contract without Quantities it is important becauseto list the exact specification and quantities for thebuilding.

In the Contract with Quantities, it is an additiondocuments for bill of quantities. The B/Q has alreadyincluded everything that affects the price.

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Specifications should generally describe theSpecifications should generally describe the following :following :

Type and thequality of every

product

Quality ofworkmanship

Administrationsof the contract for

construction

Requirement offabrication, erection

and application,installation and

finishing

Componentsdimensional

Allowances andunit prices inthe contract.

Productalternates and

options

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Users of theUsers of the specification.specification.

1. Building Contractor, Estimators and his Site Agent

To be read by the Contractors Estimator as the onlyinformation available to help prepare the competitivetender.

Estimators will take their own measurements of thework from the drawings and build up their estimatesrelying on the specifications for a full description ofquality, materials and workmanship.

The specification must be specific and crystal clear andcomplete in detail to protect he client from unwantedclaims or uncertainty.

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2. The Architect, his Resident Architect and his Clerk-of-Work

The Architect should use the Drawing and Specifications to

ensure compliance with code requirements.

Plan checkers need to readily see compliance with applicable

codes.

The Resident Architect need to supervise the indications

activities for quality ensures. The clerk-of-work need to inspect on behalf of the employer,

since the constant inspection will be necessary and the

architect is not expected to be continuously on the site.

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3. The Quantity Surveyor

The Quantity Surveyor need to be able prepares the bill of

quantities as a basis for such competitive tenders.

The Quantity Surveyor may need to prepare the bill and

instructions accordingly given by the architect as complete as

those required by the Contractors when taking their ownmeasurements and these instructions are conveyed in a

specifications.

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SPECIFICATION PRINCIPLE

What can be shown on drawings should be drawn. The

rest should be scheduled and specified

The specification should not duplicate the drawings

REQUIREMENTS OF A GOOD

SPECIFICATION

Specifications should generally describe the type and

quantity of every product in the work, quality of

workmanship, requirements for fabrication, component

dimensional, and specific description of product.

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1. It should be correctly

formatted

2. Use proper

specification language

REQUIREMENTS OF A GOOD SPECIFICATION

3. Should be consistent

and complete

4. Use universally

accepted terms

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Qualities of the specificationQualities of the specificationThe specification writer should

Be familiar with all types and classes ofworks

Understand the building process and trade

operations Be design conscious

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Have considerable site supervision

experience. Be generally familiar with the

construction industr .

Be knowledgeable in Contract Law,

Building Contraction, materials and

fittings, site operation, etc

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Parts of a SpecificationParts of a Specification1. The Preliminaries

Contains a series of preliminaryclauses corresponding to the

Preliminar Bill in a bill of uantities.

The clauses set out all items of general

application not covered by the

Conditions of Contract. They must notover-ride the Conditions of Contract.

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Parts of a SpecificationParts of a Specification2. The Works Description Section

Each subject should form a separateparagraph with marginal heading

be in the form of Schedules such as for

finishes, paintings, windows, doors,

ironmongery etc.

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For works to be carried out by the

specialist sub-contractors, specifying byprime cost sum is necessary.

For works t e and uantit that

cannot be determined at the time oftender specifying by provisional sum

is necessary.

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H)Formatting the specificationH)Formatting the specification1) Using Trade Format: arrange the specs

accordingly to sequence of work.2) Using Elemental Format: works are

s ecified accordin to elements or

rooms rather than trade.

3) marginal headings of clauses are

necessary for ease of reference

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I)Methods Of Preparing theI)Methods Of Preparing the

SpecificationSpecificationi. To start everything afresh- arduous task & seldom

done.

ii. To use an old specification as a reference model-using old specification for similar project as a base

iii. To use a standard specification- standards ecification containin standard clauses on

information and works that most buildings of aparticular organization would require isprepared.(exp:JKR)

iv. To use library of standard clauses- standard and

tersely worded clauses applicable to most types ofworks are prepared.exp: N.B.S (UK). Malaysia donot have such a specification

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ScopeScope Procument using Specification and

Drawing in Building Contract withoutQuantities

The Advanta es

The Disadvantages

Consequences of not having a complete

and comprehensive Tender Drawing andBuilding Specification

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ProcumentProcument using Specification and Drawing inusing Specification and Drawing in

Building Contract without QuantitiesBuilding Contract without Quantities

Under this option the contractor is selected and

appointed on the basis of a lump sum bid provided in

response to a detailed Specification and Drawing.

Appropriate for small projects such as house extensions

and renovations because all Tenderers need to produce

their own quantities and also the time involved inachieving a sufficiency of the design.

Not particularly appropriate where it is likely that

change will be required by the Employer after the

contract has been started due to the fact that there areno competitive rates under which variation values can

be assessed.

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The AdvantagesThe Advantages The lump sum price is firm, subject only

to variations which may be instructedduring the course of the Contract Works.

Client risk in res ect of errors in a Bill of

Quantities is avoided because theContractor prepares his own

measurement and quantities.

Can incorporate Design and Build and

Performance Specified works if required.

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The DisadvantagesThe Disadvantages The design must be well advanced in order to

prepare the detailed Specification documents. This

procurement route can therefore mean a later sitestart that with alternative procurement routes.

Give less control of cost when variations areinstructed than firm Bills of Quantities because the

ac o a e ne system o measurement o t ebuilding elements.

Tenders are not as easily comparable to each other asis possible with Bills of Quantities because thetendering contractors may interpret and price risk inthe Specification document in different ways.

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Consequences of not having a complete and comprehensiveConsequences of not having a complete and comprehensive

Tender Drawing and Building SpecificationTender Drawing and Building Specification

Measurements and quantities are inserted

into Tender Contract to enable thetenderers to price the work.

If an of the Tender Drawin and Buildin

Specification is not been given, Tenderershave no guidance for determine the

budget of the project.

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JKR STANDARDJKR STANDARD

SPECIFICATIONSPECIFICATION21ArchiNation


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Standard specifications for building works 2005 booklet ispublished by Jabatan Kerja Raya (JKR) for the use in

conducting the project by the government and non

government.

It is an important component in construction phase. Act as a

guide for the contractor precisely follow the specification that

has been set in Tender Document.

If the contractor fails to comply with the requirement stated,

the materials shall be rejected and disciplinary action will be

taken.

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LINK FOR THE BOOKLET:

http://www.jkr.gov.my/page/128

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FRONT COVER OF THEBOOKLET

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COMPONENTS IN STANDARDCOMPONENTS IN STANDARD

SPECIFICATIONSSPECIFICATIONS

AA PRELIMINARIES AND GENERALPRELIMINARIES AND GENERAL

CONDITIONSCONDITIONS

BB PILING WORK PILING WORK

CC EXCAVATION AND EARTHWORKSEXCAVATION AND EARTHWORKS

DD CONCRETE WORK CONCRETE WORK

EE BRICKWORK BRICKWORK

FF SOIL DRAINAGESOIL DRAINAGE

GG ROOFING WORK ROOFING WORK

HH CARPENTRY , JOINERY ANDCARPENTRY , JOINERY ANDIRONMONGERYIRONMONGERY

WORKWORK

II STRUCTURAL STEEL AND METALSTRUCTURAL STEEL AND METAL

WORKSWORKS

JJ PLASTERING, PAVING AND TILINGPLASTERING, PAVING AND TILING

WORKSWORKSKK WATER SUPPLY PLUMBING,WATER SUPPLY PLUMBING,

SANITARY ANDSANITARY AND

RAINWATER GOODS INSTALLATIONRAINWATER GOODS INSTALLATION

LL GLAZING WORK GLAZING WORK

MM PAINTING WORK PAINTING WORK

NN EXTERNAL WORKEXTERNAL WORK

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Specification for Building Works

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