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to sustain all existing and expected loads. For details on shoring and sloping, consult 29 <br /> CFR, Subpart P, Sections 1926.650 to 1926.653. <br /> 7.3.2 Access <br /> When work is to be performed in any excavation, safe access to the excavation must <br /> be provided by means of ladders, stairs, or ramps. Trenches four or more feet deep must <br /> have ladders spaced no less than 25 feet apart, and the ladders must extend at least three feet <br /> above grade. <br /> 7.4 INSPECTION OF EXCAVATIONS <br /> Excavations will be observed daily by a qualified representative of the subcontractor who <br /> will communicate their assessment of the stability of the excavation to the SSO at the start <br /> and end of each workday. If evidence for potential cave-ins or slides is apparent, all work <br /> in the excavation will be suspended until the necessary steps have been taken to stabilize the <br /> excavation and to safeguard employees. <br /> 7.5 OPERATION OF VEHICLES NEAR EXCAVATIONS <br /> When vehicles or heavy equipment must operate near an excavation, the sides of the <br /> excavation must be shored or braced as necessary to withstand forces exerted by the <br /> superimposed load and the earth pressure. Stop logs or other types of secure barriers must <br /> be installed at the edges of the excavations. <br /> 7.6 BRIDGES AND WALKWAYS <br /> Walkways or bridges with standard guardrails must be provided where employees or <br /> equipment are required or permitted to cross over excavations. Pedestrian walkways shall <br /> be of sufficient strength to permit a vertical deflection of no more than 0.5 inch when a 250- <br /> pound weight is applied to the center of the walkway. <br /> 80500000 H:\HEALTH\FNLHSP April 21, 1991 <br /> FEMA USr,Pmol G..ri< HSP 23 <br />