using exhausting ventilation system fan safety precaution while rope access miners commencing oxy torch cutting metal hot work in

access area australia background blue building closeup commencing confined construction control cutting danger design equipment exhausting fan gas heavy helmet hot incident industrial industry light machine maintenance male manufacture manufacturing metal mine miner miners nature oxy personnel perth plumber precaution preventing professional protection repairing rescue restricted rope safety site space spaces spark steel storage system technology torch using ventilation vetilationing wearing welding while work worker