Tender Documents Specification of workmanship and materials 3. - PDF document

Tender Documents Tender Documents consist of the following: 1. Tender Drawings 2. The specification • General requirements Tender Documents • Specification of workmanship and materials 3. Bill of Quantities 4. Conditions of Contract 5. Form of Tender 6. Form of Agreement 7. Form of bond 1. Tender Drawings 2. The Specification • The purpose of tender drawings is to describe the project (a) PART A: General Requirements in sufficient detail so that the price submitted by the • It includes relevant details of the site and information on items which do not contractor can be expected to be realistic. form part of the permanent works. – (i) Preliminaries (Not part of permanent works). They include: • Drawings must show sufficient detail so that there is not • Services (water, electricity, gas, drainage) significant change and subsequently no significant • Accommodation (offices, toilets) • Huttage (stores, workshops) change of the cost. • Security (fencing, watchman) • Protection • Temporary roads and lighting • Insurance • Scuffolding • Administration and office equipment • Cost of staff 2. The Specification 2. The Specification (b) PART B: Specification of workmanship and materials (a) PART A: General Requirements • It deals with the detailed requirements of every trade. The type, the quality and method of fixing (or fabrication) and testing of every item for – (ii) Program and sequence of construction incorporation in permanent works is described. – (iii) Liaison with other contractors – (iv) List of tender drawings • Typical contents of ‘specification of workmanship and materials’ are: – Demolitions – Excavations and Earthworks – Drainage and sewerage – Piling and ground anchors – Mass reinforced concrete – Brickwork – Masonry – Waterproofing – Metalwork – Structural steelwork 1

2. The Specification 2. The Specification (b) PART B: Specification of workmanship and materials (b) PART B: Specification of workmanship and materials – Carpentry • Typical contents of concrete specification: – Floor, wall and ceiling finishes – Type of cement to be used – Glazing – Type of aggregate – Sanitary appliances – Type of water – Mechanical and electrical Engineering services – Type of mixer required – Painting and Decorating – Trial mixes required – Roads – Test results required – Fencing – Method of mixing – Tests on mixing – Methods of transporting and placing – Tests on concrete produced – Methods of curing – Stripping times for formwork SECTION 1 SECTION 2 GENERAL CLAUSES CLEARING THE SITE Work to be Done The Contractor shall furnish, except as otherwise expressly provided in the Contract, all materials, equipment and labour to complete the work in accordance with the terms of this Contract. Without in any way limiting the scope of the foregoing, the work shall include all necessary clearing and Work to be Done grubbing; all dewatering; all excavation; all backfilling; all ditching; all sheeting; shoring, bracing and Under this Section, the Contractor shall supply all labour, materials and equipment necessary supporting; preparing and maintaining access roads; transporting and placing all materials supplied by the to clear and grub the areas of excavation as specified herein. Employer and supplying and placing all construction materials necessary to build and put into complete The Contractor shall clear all areas specified in this Contract of all boulders, trees, bushes, working order, the sewer pipes and all associated works and asphalt re-surfacing as specified herein and as indicated on the Contract Drawings, within the terms of this Contract. logs and rubbish and shall grub to remove stumps, roots, foundations, etc. The Contractor, The Contractor shall also furnish all equipment, tools, labour and materials to support, protect, and where necessary shall also demolish all existing structures and remove existing obstructions maintain all conduits, ducts, pipes, fences, shrubs, trees or other existing features and structures. He shall from the work site. also repair all damage to such utilities, features and structures as may be caused by his operations under Grubbing this Contract. Grubbing shall include the removal and disposal of all boulders, stumps, roots, trees and On the completion of construction the Contractor shall leave the entire work in a clean and orderly grass as specified herein. condition to the satisfaction of the Engineer. Disposal of Materials Estimated Quantities The quantities shown in the Tender Form for unit price items are estimates only. Payment for these items All materials derived from the clearing, demolition and grubbing operations shall become the will be made on actual measurements of work done during construction. property of the Contractor and shall be satisfactorily disposed of the site by the Contractor at The Contractor shall be entitled to no additional allowance above the unit prices bid for these items by his own expense. reason of any variation of quantities, except as stated in the General Conditions. Removal of Temporary Fences and Barriers Drawings and Specifications On completion of the Contract the Contractor shall remove all temporary fences and barriers The works are to be built of the materials and to the sizes, dimensions and grades as called for in the erected by him. Specifications and Contract Drawings and such other Drawings as may be added from time to time by the Engineer during the progress of the work. 3. Bill of Quantities 3. Bill of Quantities • It is like a ‘shopping’ list It lists every work activity or component • It serves the following purposes: part necessary for the execution of the (permanent) works. – To help to describe the scope of the works – To provide a means for pricing • These quantities are generally prepared by the Engineer’s staff – To effect standardization for realistic price comparison (to provide a means of comparing the costs of different tenders) and sometimes by quantity surveyors. – To provide a means of valuing completed work – To provide a basis (method) for pricing variations. • Bill of Quantities is essential to cost control. • The Contractor inserts a rate and multiplies it with the given • Arranged to same sections as specifications. quantity. • Bills of quantities are prepared from tender drawings. 2