Questions and Answers
What is the minimum projection of footings beyond each side of the wall?
100 mm
What is the purpose of forming a key on the top of the footings?
To help the foundation wall resist earth pressure
What material should be used to level the footing excavation if it is uneven and too deep in places?
Compacted granular material
Why is it recommended to place a polyethylene sheet over the footing?
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What should be done to pipe trenches directly under wall footings?
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What is the recommended vertical distance between steps in footings on sand or gravel?
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What should be the minimum horizontal distance between steps in footings?
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What is the minimum thickness of the vertical connection between footings at the step?
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What is the recommended action for steep slopes where more than one step may be required?
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What is the recommended placement of the bottom of each run level of the footing?
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