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TRENCHING & SHORING GUIDELINES - TAMUC

TRENCHING & SHORING GUIDELINES DEPARTMENT OF RISK MANAGEMENT AND SAFETY CREATED JUNE 2009 Table of Contents Introduction .. 1 Requirements .. 1 Excavations .. 2 SHORING Types .. 2 Hydraulic SHORING .. 2 Pneumatic SHORING .. 2 Screw Jacks .. 2 Single-Cylinder Hydraulic Shores .. 3 Underpinning .. 3 Shielding Types .. 3 Trench Boxes .. 3 Combined Use .. 3 Slope and Shield Configurations.. 4 Sloping and Benching .. 4 Sloping .. 4 Slope Configurations .. 5 5 Determination of Soil Type .. 6 Stable Rock .. 6 Type A Soils .. 6 Type B Soils .. 6 Type C Soils .. 6 Soil Testing Methods .. 7 Visual Test .. 7 Manual Tests .. 7 Soil Mechanics .. 8 Safety and Health Considerations .. 9 Competent Person .. 9 Surface Crossing of Trenches .. 9 Ingress and egress .. 9 Exposure to Vehicles .. 10 Exposure to Falling Loads .. 10 Warning Systems for Mobile Equipment.

Adequate means of egress will be maintained at all times. Excavations located near public traffic shall be barricaded and employees shall be ... sloped according to the procedures and requirements set forth in OSHA's Excavation standard, 29 CFR 1926.650, .651, and .652.

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  Name, Standards, Osha, Means of egress, Egress

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