4.3.8 Sloping ground and stepped foundations
Strip and trench fill foundations shall be taken to a suitable bearing level when building on sloping ground, and steps shall be suitably formed.
Sloping ground may require stepped foundations. Where foundations are stepped, the height of the step should not exceed the thickness of the foundation, unless it forms part of a foundation designed by an engineer in accordance with Technical Requirement R5.
Table 3: Foundation overlap
| Strip foundations | Trench fill foundations | |
|---|---|---|
| The overlap should be not less than: | • 2 x S, or
• T (maximum 500mm), • or 300mm, whichever is largest | • 2 x S, or
• one metre, whichever is largest |
Last updated: 2nd January 2024