After determining soil type, the depth of a trench is specified and then referenced to a chart keyed to soil type in order to determine the required shoring depth and configuration for proper excavation safety. Cal/osha cso, § 1541.1 covers almost all of the requirements that must be considered when selecting or reviewing a shoring system N anyone think of any other tips that are pertinent to timber shoring safety
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Trenching excavation is recognized as one of the most hazardous construction activities, which is why the osha excavation standards include a special emphasis on trench safety.
This chapter is intended to assist osha technical manual users, safety and health consultants, osha field staff, and others in the recognition of trenching and shoring hazards and their prevention. Trench jacks may be used in lieu of, or in combination with, cross braces Where desirable, steel sheet piling and bracing of equal strength May be substituted for wood.