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Last edited 04 Aug 2022
As-built drawings and record drawings
As a result, it is common for the client to require that as-built drawings are prepared, either during the construction process or when construction is complete, to reflect what has actually been built. The contractor will generally mark up changes to the ‘final construction issue’ drawings on-site using red ink, and these can then be used by the consultant team to create record drawings showing the completed project. This information may be supplemented by as-built surveys.
These record drawings (sometimes referred to as 'as constructed' drawings) may be required for the Health and Safety File or the operation and maintenance manual issued to the client on completion of construction.
Apart from registering on site changes to the engineers' and architect's drawings it is essential that specialist trade contractors record what has been installed on site. Records of installations such as under-floor cabling in city offices is a particular problem because successive tenants cut off, but leave in, their predecessors cables then instal their own systems. Without cabling records this can prove very problematic for subsequent companies that occupy the premises.
The client’s facilities management team must keep record drawings up to date, incorporating details of future modification to the building. If they do not do this, ultimately, surveys may become necessary to re-create accurate measured drawings.
The requirement to produce as-built drawings and record drawings must be set out in tender documentation, and should not be assumed to be part of ‘standard’ services. It can be a time-consuming exercise, and as the project team will be keen to move on to other jobs, it is important that adequate retention remains to ensure completion of as-built and record drawings.
If a building information model has been produced, this must be updated to reflect any changes to the design, and then issued to the client in a form that the facilities management team can continue to develop.
NB The RIBA Plan of Work 2013 defines 'as constructed' information as: Information produced at the end of a project to represent what has been constructed. This will comprise a mixture of ‘as-built’ information from specialist subcontractors and the ‘final construction issue’ from design team members. Clients may also wish to undertake ‘as-built’ surveys using new surveying technologies to bring a further degree of accuracy to this information.’
Design Framework for Building Services 5th Edition (BG 6/2018), written by David Churcher, John Sands & Martin Ronceray, and published by BSRIA in June 2018 suggests that record drawings (in relation to buildings services) are:
- As-built data.
- Types of drawing.
- Assembly drawing.
- Component drawing.
- Concept drawing.
- Design drawings.
- Detail drawing.
- Health and safety file.
- Installation drawings.
- Operation and maintenance manual.
- Tender documentation.
- Scale drawing.
- Section drawing.
- Shop drawing.
- Site plan.
- Technical drawing.
- Verified construction information.
- Working drawing.
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