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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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