basket blue construction cradle crane danger elevated elevation elevator empty equipment escape exploration extricate fire firemen heaven height high hoist hydraulic job ladder lift lifting machinery mans mechanical men mobile occupation people platform practice profession rescue rise save service sky step team teamwork train white work aerial-work-platform articulating-boom-lift basket-crane boom-lift cage cherry-picker cherrypicker compact dangerous elevated-work-platform extension hydraladder hydraulic-arm hydraulic-lifting-system hydraulic-platform hydraulics looking-up maintenance man-lift manoeuvrable mobile-hydraulic-platform nifty-lifter railing rails raised raised-platform safety tall trees up-high workplatform Harness men-at-work roof roof-work roofing safety-harness self-propelled workmen