Class code 5059 — Iron or Steel Erection — Frame Structures

This classification covers ironworkers erecting steel framework, joists, and decking specifically on lower-rise frame structures, as distinct from the larger-scale structural steel erection used on high-rise buildings and major bridges. Crews assemble prefabricated steel components — columns, beams, joists, and metal decking — for buildings such as warehouses, retail centers, and light industrial facilities.

Payroll includes connectors who bolt up steel members, deck installers who lay and fasten metal decking across joists, and riggers who assist with crane-hoisted material. Because frame structures are typically lower in height than major commercial towers, crews may use smaller equipment and different access methods than high-rise steel crews, though the core hazards remain similar.

Falls remain the dominant hazard, particularly during the period after steel is erected but before decking is fastened and fall protection systems are fully installed. Struck-by hazards from crane-hoisted steel and metal decking, along with cuts from handling sharp decking edges, round out the main injury sources for this trade.