What is the sloping requirement for a trench in Type A soil?
Reviewed by Julie Gunn, Head of Services, SALUS Safety
The question, as asked: What is the sloping on a trench with soil type a
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Rosie's answer
Published by SALUSFor excavations in Type A soil, the maximum allowable slope depends on the depth and duration the excavation is open. For simple slope excavations 20 feet or less in depth, the maximum allowable slope is 3/4:1 (horizontal to vertical) 1, 2. However, if the excavation is open for 24 hours or less (short term) and is 12 feet or less in depth, a maximum allowable slope of 1/2:1 is permitted 1, 2.
It's important to note that surcharge loads from stored material, equipment, or traffic can affect the required slope. A competent person must determine how much the slope needs to be reduced below the maximum allowable slope in such cases 5, 20.
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