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0 0 512.7 MATERIALS AND EQUIPMENT • The employer is responsible for the safe condition of materials and equipment used for protective systems. Defective and damaged materials and equipment can result in the failure of a protective system and cause excavation hazards. To avoid the possible failure of a protective system failure, the employer must ensure that (1) materials and equipment are free from damage or defects, (2) manufactured materials and equipment are used and maintained in a manner consistent with the recommendations of the manufacturer and in a way that will prevent employee exposure to hazards, and (3) while in operation, damaged materials and equipment are examined by a competent person to determine if they are suitable for continued use. If materials and equipment are not safe for use, they must be removed from service. These materials cannot be returned to service without the evaluation and approval of a Registered Professional Engineer. 512.8 OTHER HAZARDS 512.8.1 Falls and Equipment In addition to cave-in hazards and secondary hazards related to cave-ins, there are other hazards from which workers must be protected during excavation related work. • These hazards include: exposure to falls, falling loads, and mobile equipment. To protect employees from these hazards, the following precautions will be taken: • Materials and equipment that might fall or roll into an excavation will be kept at least 2 feet from the edge of excavations, or have retaining devices, or both. • Warning systems such as mobile equipment, barricades, hand or mechanical signals, or stop logs will be used to alert operators of the edge of an excavation. • Scaling will be provided to remove loose rock and soil, or protective barricades or other equivalent protection will be installed to protect employees against falling rock, soil or materials. • Employees will be prohibited from working on faces of sloped or benched excavation at levels above other employees unless employees at lower levels are adequately protected from the hazards of falling, rolling, or sliding material or equipment. • Employees will be prohibited from standing or working under loads that are handled by lifting or digging equipment. To avoid being struck by any spillage or falling materials, employees will be required to stand away from vehicles being loaded or unloaded. If cabs of vehicles provide adequate protection from falling • loads during loading and unloading operations, the operators may remain in them. 5