Substructure and ground-bearing floors

5.1.2Provision of information

Designs and specifications shall be produced in a clearly understandable format, include all relevant information and be distributed to appropriate personnel.

Design and specification information should be issued to site supervisors, relevant specialist subcontractors and suppliers, and include the following information:

  • Plan dimensions and levels which should be related to benchmarks.
  • The required sequence and depth of trench backfill where relevant to the design of the walls below the DPC.
  • Details of trench backfill, infill and void formers
  • Work required to maintain the integrity of DPCs and damp proof membranes (DPMs).
  • Information on proposed underground services, including points of entry to the building.
  • Detailing of service penetrations through the substructure, including support of the structure above details of junctions between the DPM, DPC and tanking.
  • Details of underfloor, floor edge and cavity insulation.