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...Loss prevention safety topics standard signals for cranes hoists derricks etc and other material handlers a set of should be because the noise confusion distance crane operators from guide person agreed upon adopted at on construction jobs verbal commands are often useless therefore it is necessary to each operation where hoisting use hand field telephones or two way radios equipment used following standards apply all handling legible chart depicting explaining available in vicinity regular any one place given by designated an emergency however anyone may give stop signal personnel clear before move load only moved under direction mobile boom type excavators equipped with audible device avoid fast operations swings cause swing out increasing radius rapid braking increases stress operator workers wear required personal protective clothing times job site traveling avoided whenever possible qualified responsible individual no duties if you have questions about sure up beginning contact yo...