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0 0 <br /> Option 1 - Allowable configurations and slopes <br /> • Excavations shall not be sloped at an angle greater than 1-1/2 horizontal to 1 vertical <br /> (340 measured from the horizontal ). This 1-1/2:1 sloping requirement does not hold true <br /> if one of the other three options is utilized. <br /> Option 2 - Determination of slopes and configuration (using Appendices A & B <br /> included in the Federal excavation standard) <br /> The maximum allowable slope and the allowable configurations for sloping and benching <br /> systems, will be determined in accordance with the conditions and requirements as <br /> stated in Appendix A and B of 29 CFR 1926, Subpart P. Appendix A involves classifying <br /> soils as Type A, B, or C, or a combination of the three. Appendix B involves <br /> specifications and configurations for sloping and benching systems. <br /> Option 3 - Design by using other tabulated data <br /> Sloping and benching systems can be designed by utilizing other tabulated data such as <br /> tables and charts. However, the tabulated data will be in written form and include the <br /> following elements: <br /> • identification of the parameters that affect the selection of a sloping or benching <br /> system drawn from the tabulated data; <br /> • identification of the limits of use of the data, to include the magnitude and <br /> configuration of slopes determined to be safe; <br /> • explanatory information as may be necessary to aid the user in making a correct <br /> selection of a protective system from the data; <br /> • at least one copy of the tabulated data (which identifies the registered engineer <br /> who approved the data), shall be kept at the jobsite during construction of the <br /> protective system. After that time the data may be stored off-site but available <br /> upon request of the inspector. <br /> Option 4 - Design by a registered professional engineer <br /> Sloping and benching systems which do not utilize Options 1, 2 or 3 will be approved by <br /> a registered professional engineer. The design will be in written form and will contain at <br /> least the following: <br /> • the magnitude of the slopes that were determined to be safe for the particular <br /> project; <br /> • the configurations that were determined to be safe for the particular project; <br /> 3 <br />