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By Sophie Rhéaume • décembre 2, 2017

Bench Cut Excavation in SRW Construction

Techo-Bloc

Paver Pete presents bench cut excavation in a segmental retaining wall application.

The Occupational Safety and Health Administration (OSHA) requires bench cut excavation with no more than 5 feet of height without a 3-foot shelf.

 The angle of bench cut depends on the type of subsoil that you are working in.

  • Sandy soil: 35° back cut. 1 foot up and about 1 ½ foot back.
  • Clay soil: 26° back cut. 1 foot up and about 2 – 2 ½ feet back.

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In this case, we have a sandy soil. This type of soil tends to shift. As it slides, it forms the curved shape of a lens. Shifting or lensing soil can be very dangerous.

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Learn more about OSHA excavation standards here.

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