TR-1 Excavation - Sheeting Shoring Bracing

TR-1 Excavation - Sheeting Shoring Bracing

3304.4 Protection of sides of excavations. 

3304.4.1 Shoring, bracing and sheeting. The sides of all excavations, including related or resulting embankments, that are 5 feet (1524 mm) or greater in depth or height measured from the level of the adjacent ground surface to the deepest point of the excavation shall be protected and maintained by shoring, bracing, sheeting, sheet piling, or by other retaining structures as may be necessary to prevent the sides of the excavation from caving in before permanent supports are provided. Such methods of protection shall be subject to special inspection in accordance with the provisions of Chapter 17.

Alternatively, excavation sides may be sloped not steeper than 45 degrees (0.79 rad)‡ or stepped so that the average slope is not steeper than 45 degrees (0.79 rad)‡ with no step more than 5 feet (1524 mm) high, provided such slope does not endanger any structure, including subsurface structures. Deviation from the foregoing limitations for cut slopes shall be permitted only upon the completion of a soil investigation report acceptable to the commissioner.
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