Q: Are you permitted to dig 1-2 feet below the shoring box in a
4x5 trench?
A: Yes, according to 1926.652(e)(2)(i), you can excavate no more
than 2 feet below the bottom of the support system, only if the support system
itself can handle and resist the forces calculated for the full depth of the
trench and if there are no signs of a loss of soil from below or behind the
support system.
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