Strip and trench fill foundations

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4.3.2Provision of information

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

Clear and fully detailed drawings should be available on site to enable work to be carried out in accordance with the design.
Design and specification information should be issued to site supervisors, relevant specialist subcontractors and/or suppliers.
All necessary dimensions and levels should be indicated and relate to at least one benchmark and reference points on the site.

Information on ground conditions, the site investigation and the foundation design may be requested by NHBC, including sites which may not be classified as hazardous.

Both designers and site operatives need to be aware of the ground conditions and any features requiring special attention, such as existing sewers or other services, the water table and the presence of any hazardous substances, including sulfates.

Where toxic materials or those likely to present a health hazard are found, all available information should be supplied to NHBC, together with proposals for remediation.

Full details of junctions, steps, movement joints and any critical sequences of construction should be provided.