A professional who performs any combination of following duties to raise, place, and unite girders, columns, and other structural-steel members to form completed structures or structure frameworks, working as member of crew. Responsibilities include:

• Sets up hoisting equipment for raising and placing structural-steel members.
• Fastens steel members to cable of hoist, using chain, cable, or rope.
• Signals worker operating hoisting equipment to lift and place steel member.
• Guides member, using tab line (rope) or rides on member in order to guide it into position.
• Pulls, pushes, or pries steel members into approximate position while member is supported by hoisting device.
• Forces members into final position, using turnbuckles, crowbars, jacks, and handtools.
• Aligns rivet holes in member with corresponding holes in previously placed member by driving drift pins or handle of wrench through holes.
• Verifies vertical and horizontal alignment of members, using plumb bob and level.
• Bolts aligned members to keep them in position until they can be permanently riveted, bolted, or welded in place.
• Catches hot rivets tossed by rivet heater in bucket and inserts rivets in holes, using tongs.
• Bucks (holds) rivets while pneumatic riveter uses airhammer to form heads on rivets.
• Cuts and welds steel members to make alterations, using oxyacetylene welding equipment.
• May specialize in erecting or repairing specific types of structures and be designated bridge-maintenance worker; reinforced concrete chimney builder; metal scaffold builder; structural-steel-equipment erector.