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Cost planning the technical design (documentation) stage
Published in Jim Smith, David Jaggar, Peter Love, Oluwole Alfred Olatunji, Building Cost Planning for the Design Team, 2016
Jim Smith, David Jaggar, Peter Love, Oluwole Alfred Olatunji
The Technical Design Stage commonly produces the following documents for the fully designed building project:Location drawings: drawings up to 1:50 scale, showing layouts and relationships.Assembly drawings: detail drawings, usually at 1:20 or 1:10 or larger scale, showing how different elements relate to each other. A typical assembly drawing is shown in Figure 10.3.Component drawings: drawings giving information necessary for the manufacture of particular components.Specifications: document with technical requirements of materials and standard of workmanship required on the project.Bills of quantities: detailed schedule of all quantities of materials, labour and any other items required to execute a project. Its content is based on the drawings, specification and schedules prepared by the design team at the Production Information stage.
Preparing contract documents
Published in Alan C. Twort, J. Gordon Rees, Civil Engineering Project Management, 2007
These form an itemized list covering the works to be constructed, against each item of which the tenderer has to quote a price. A bill of quantities shows the number or quantity of each item and its unit of measure, the rate per unit of quantity quoted by the tenderer, and the consequent total price for that item. This permits re-measure according to the actual quantity done under each item. Some bills contain many hundreds of items, classified by trade or according to a standard method of measurement; other bills contain a less number of items (see Chapter 15). A schedule of prices may comprise a series of lump sums or it may call for rates only, but can list provisional quantities which are estimated, that is, uncertain. They would be used, for instance, for a contract for sinking boreholes, items being provided for boring in stages of depth, the total depth to which any hole has to be sunk not being known in advance.
Contract documents
Published in Allan Ashworth, Srinath Perera, Contractual Procedures in the Construction Industry, 2018
Allan Ashworth, Srinath Perera
Although the main use of a bill of quantities is to properly assist the principal contractor during the process of tendering, it can be used for many other purposes, such as: Preparation of interim valuations in order that the architect may issue the certificate.Valuation of variations that have either been authorised or sanctioned by the architect or engineer.Cost control purposes.Ordering of materials, if care is properly exercised in the checking of quantities and the implications of future variations.Preparation of the final account, the bill is used as a basis for agreement.Production of a cost analysis for the building project.Determination of the quality of materials and standard of work by reference to preamble clauses.Obtaining subcontract quotations for sections of the measured work.A form of cost data.Taxation and grant purposes.Preparing contractual claims, when it then becomes essential.
Building information modelling application of material, water, and climate footprint analysis
Published in Building Research & Information, 2021
The Bill of Quantities (BoQ) can be used to extract and summarize building information, such as the quantities of construction materials to be multiplied by the environmental impact factors and added in order to evaluate the environmental performance of the whole building (Cavalliere et al., 2019). However, this approach is not sufficient when assessing an entire building (Hollberg & Ruth, 2016). This is due to the complicated and time-consuming process of transferring and synchronizing building data from a building design tool into an LCA tool (Zabalza Bribián et al., 2009). Researchers have shown an increased interest in combining environmental performance assessment with building design tools through building information modelling (BIM) (Jalaei & Jrade, 2015).