Welding Machines. When arc welder or acetylene torches are used while working aloft on all structural frames, stagings, scaffolds or ladders no less than two (2) Ironworkers shall be employed for each unit when necessary for purposes of safety. When arc welders and acetylene torches are needed together they shall be classed as one unit. When welders and cutting torches are working in a group on ground or floor level or bridge decks, the following helpers shall assist: two (2) welders -1 helper; three (3) or four (4) -2 helpers; five (5) or six (6) -3 helpers. For purposes of this paragraph, a group shall mean all welders and burners working on the same piece of equipment. This does not apply to the work described in the first paragraph of this Section I. No other person or any craftsman shall assist any welder or burner except a journeyperson Ironworker.
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