Steel Erection
Steel erection activities include hoisting, laying out, placing, connecting, welding, burning, guying, bracing, bolting, plumbing and rigging structural steel, steel joists, and metal buildings. It also includes installing metal decking, curtain walls, window walls, siding systems, miscellaneous metals, ornamental iron and similar materials, and moving point-to-point while performing these activities.
- Permanent floors must be installed as the erection of structural members progresses. Specifically, there are not to be more than eight stories between the erection floor and the uppermost permanent floor except where specifically allowed for in the design documents.
- There must not be more than four floors or 48 feet of unfinished bolting or welding above the foundation or uppermost permanently secured floor.
- Safety nets shall be installed around the perimeter of the structure to prevent workers from falling more than 25 feet. On buildings or structures not adaptable to temporary floors, and where scaffolds are not used, safety nets shall be installed and maintained whenever the potential fall distance exceeds two stories or 25 feet. The nets shall be hung with sufficient clearance to prevent contact with the surface of structures below.
- The floor that is being used as the erection floor must be solidly planked or decked over its entire surface except for access openings.
- A safety railing of ½ inch wire rope or equal must be installed around the periphery of all floors.
- Two bolts or rivets must be secured at each connection before a steel element is detached from the hoist.
- Structural steel members shall not exceed a span of forty feet without a center bridging.
- Turnbuckles used for plumbing up steel shall be secured to keep from unwinding.
