The ability to safely move materials from one location to another is a vital part of installing a green roof. Hoists are often used when materials plantings and soil mediums are too heavy or bulky to be moved manually. Fatalities and serious injuries can occur if cranes are not inspected and used properly. Many fatalities can occur when the crane boom, load line or load contacts power lines and shorts electricity to ground. Other incidents happen when workers are struck by the load, are caught inside the swing radius or fail to assemble/disassemble the crane properly. See OSHA's General Industry standards at 29 CFR 1910.179 and 29 CFR 1910.180 and Construction standard at 29 CFR 1926.1417 [PDF*] for specific crane requirements.
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