16 Mar 2020: Revised.
21 Dec 2014: Moved from wiki.
Different Parts of Specification
- Specification Preliminaries.
- Technical Specification 技术要求:
- General Specification or Standard Specification.
- Particular Specification.
- Technical Schedules.
- Called as such if not included as Bill No. 1 - Preliminaries in full.
- To specify the contractual requirements, financial requirements and site constraints specific to the project and common to all work sections in addition to those contained the Conditions of Contract.
- To specify the technical aspects of the work
- To specify the materials, workmanship and acceptance standard.
- May contain some general requirements which would not be repeated on the Tender Drawings.
- May also contain some special requirements which could not be shown on the Tender Drawings.
- To supplement the Technical Specification in table format.
- May contain spaces for tenderers to fill in information about their proposals.
Method of specifying
- Prescriptive specification.
- Performance specification.
- By specific brands or models.
- By prime cost rates.
Usual contents of a section in the Technical Specification
- Contractor's design requirements
- Performance requirements
- Warranty requirements
- Contractor's submissions and approval procedures
- Manufacturers' certificates
- Independent laboratories' test reports
- Shop drawings
- Field installation drawings
- Ancillary builder's work drawings
- Acceptance inspection
Provision of Specification
- Specification should be obtained from the Architects and Engineers upon commencement of taking-off.
- Occasionally, the Architects and Engineers may ask the Quantity Surveyors to provide Specification. Strictly speaking, provision of Specification is not part of the Quantity Surveyors’ usual services and is excluded from the fees.
- Some QS firms have their standard specification. Provision of such standard specification for the Architects’ and Engineers’ reference should be qualified as to the liability for errors.
- Making general references to local government or national or industry standard specifications may lack precision because of the presence of different levels of optional requirements in the standard specifications.
- The Technical Specification should be drafted to suit the need for the Works.
BQ descriptions to reflect the Specification
- The Specification may contain additional information on materials and workmanship which are not shown on the Drawings. There may be different grades for the same class of materials. There may be different components making up a complete work which require separate measurement. Therefore, care should be exercised to ensure that the BQ items represent and correspond to the materials, workmanship, kind, type, grade, etc. given in the Specification.
- The Specification is usually very lengthy, it would be impracticable for the BQ descriptions to repeat the Specification clauses. The Specification should be read together with the BQ descriptions. Instead of repeating the Specification clauses in detail, the BQ descriptions should be adequate to define the scope of component materials and work required so that there would be no ambiguity as to what are required to be included in the BQ rates.
Specification notes on Drawings 图纸上的规范说明
- The specification notes on Drawings should be scrutinized as well. The specification notes generally reflect the particulars of a particular project more than the Specification which can be very standard for all projects.
- Any discrepancies between the clauses in the Specification and the specification notes should be clarified with the Architects or Engineers.
- The terminology of specification notes on Drawings and annotations on Drawings can be loosely used, and inconsistency with the terminology used in the Specification is not uncommon. The terminology used in the Specification should be followed in the BQ descriptions.
Lining through Specification 规范上画线
- Similar to the practice of lining through notes and annotations on Drawings, the clauses in the Specification should also be lined through each by each as and when the contents have been taken into consideration in the measurement or writing BQ descriptions.
- Since the Specification clauses may involve work measured by more than one Taker-off, the Specification clauses should be lined through by all Takers-off involved. Different colour pencils may be used by different Takers-off and the bottom of the line or pages should be initialled.
- Handwritten draft changes to the Specification should be marked by fountain pens, ball pens or felt pens using red ink.
- Upon completion of taking-off, the presence of any Specification clauses not lined through may mean that they have not yet been taken into account.