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Excavation,Trenching Shoring Safety and the OSHA Excavat _ Standard - ... Page 2 of 3 <br /> method of cutting back the trench walls at such an angle that there is little chance of collapse. This is <br /> referred to as an "angle of repose",and must be suitable to the type of soil. <br /> 12'M ax. <br /> � 1 <br /> in <br /> Simple Slope Type A <br /> Benching is a process of stepping off the earthen walls of an excavation. <br /> 20f . <br /> s <br /> 41 <br /> fi <br /> Sloping can be used as a system by itself or in conjunction with benching. <br /> t <br /> J. <br /> JI� <br /> 20'Max. r 1 <br /> 3' <br /> Max. 3/4 <br /> 4 Max_ ��` <br /> In the real world,there are very few applications where sloping and/or benching can be used. Why. Most <br /> often,the luxury of available space is the first consideration. Many excavations are dug in right-of-ways <br /> where the presence of other utilities and traffic become major considerations. Moreover,for every cubic <br /> yard of soil that is removed, it is very likely that nearly the same amount of material must be put back, <br /> and compacted as well. <br /> Simple Slope in Type C Soil <br /> http://www.afscme.org/health/excav05.htm 8/25/2005 <br />