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Last edited 11 Apr 2018
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).’
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.
 Find out more
 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.
- Planning (Subterranean Development) Bill.
- Structure definition.
- Structural engineer.
- Structural principles.
- Types of structure.
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