ASME B30.7 pdf download BASE- MOUNTED DRUM HOISTS lf adopted for governmental use，the references toother national codes and standards in the specific vol-umes may be changed to refer to the correspondingregulations of the governmental authorities. The use of cableways, cranes, derricks, hoists,hooks,jacks，and slings is subject to certain hazards thatcannot be met by mechanical means but only by theexercise of intelligence,care,and...