Mechanical Services

Abstract

The measurement of mechanical services installations requires a detailed knowledge of technology. The drawings from which the quantity surveyor must work are those that are prepared by the consulting services engineer. Consulting engineers are required by their scale of charges to prepare drawings and specifications ‘sufficient to obtain tenders’. The drawings are schematic only, as it is trade practice for the contractor to prepare all necessary working drawings and to include in his tender for a complete working installation. The exact routeing of pipework and ductwork is often left to the craft operatives doing the work and the contractor will have in mind such factors as the location of other services, restrictions on space and the ease of maintenance of the completed work. In essence, the quantity surveyor must put himself in the position of the operative and include in the bill of quantities all items necessary for the complete installation. A good practical knowledge of the technology of services installations is therefore essential.