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  • Users: nres
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  1. nres

    Trench Layback

    When digging a utility trench, a waterline for ex., in hawaii if the trench height is above 4ft, shoring or layback is required. ex: The trench section requires the final backfill material to the bottom of subgrade to be select granular fill. The question is: When sloping or benching the...

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