The Building Cost Information Service (BCIS), Elemental Standard Form of Cost Analysis Principles, Instructions, Elements and Definitions 4th (NRM) Edition published by the Royal Institution of Chartered Surveyors (RICS) in 2012, describes the rules for preparing an elemental cost analysis in standard BCIS format.
It defines the term substructure as:
‘All work below underside of screed or, where no screed exists, to underside of lowest floor finishes including damp-proof membrane, together with relevant excavations and foundations (includes walls to basements designed as retaining walls).’
It suggests that the function of the substructure is to, ‘… transfer the load of the building to the ground and to isolate it horizontally from the ground.’
According to BCIS, the substructure includes:
- Foundations up to and including the damp proof course.
- Lowest floor assembly below the underside of the screed or the lowest floor finish.
- Basement excavation.
- Basement retaining walls up to and including the damp proof course.
Some much broader definitions consider the substructure to include all works below ground level, although clearly, this is a fairly ambiguous description.
 Related articles on Designing Buildings Wiki
- Basement excavation.
- Basement v cellar.
- Building Cost Information Service.
- BCIS elements.
- Concept structural design.
- Cost planning.
- Diaphragm wall.
- Elemental cost plan.
- New Rules of Measurement.
- Planning (Subterranean Development) Bill.
- Quantity surveyor.
- Structure definition.
- Structural engineer.
- Structural principles.
Featured articles and news
Paying for off-site goods or materials can be useful, but it puts the client at risk.
People power can be transformative if properly informed and inspired.
ZHA win competition to build an Urban Heritage Administration Centre in Saudi Arabia.
Leaps, not steps, are needed to avoid a ticking time bomb, say BRE in response to Farmer Review.
A multi-purpose hall in France covered in a translucent orange membrane.
Winning designs revealed for a rock formation-influenced residential complex in Rennes.
An article explaining the techniques, regulations and environmental impacts of carbon capture and storage.
Watch one of the first documentaries by the acclaimed Adam Curtis, examining the substandard system building of the 1960s.
Take a look at the tech start-up that could transform construction design and communication.
This house in Barcelona uses an innovative new facade tiling system to blend into the landscape.
The origins, evolution and future of Level 3 BIM.