Strip and trench fill foundations

4.3.5Setting out

Strip and trench fill foundations shall be set out to take account of the design details.

The accuracy of setting out should be checked by control measurements of trenches, including their location relative to site boundaries and adjacent buildings. Levels should be checked against accepted benchmarks.

For excavations, check:

  • trench lengths
  • trench widths
  • length of diagonals between external corners.

Walls should be located centrally on the foundation, unless specifically designed otherwise.

Any discrepancy in dimensions should be reported promptly to the designer. Resulting variations should be distributed to all appropriate persons, including NHBC.