Steel Erection

Structural ironworkers raise and connect steel at height, often with nothing but the beam beneath them. OSHA’s steel erection standard has special rules for this work.

• Construction

Top hazards

• Falls from beams, columns and decking
• Struck by swinging or falling steel and crane loads
• Structural collapse from inadequate bolting or bracing
• Tripping on shear connectors (studs) welded to beams

Key rules

• Fall protection at 15 feet or more for most steel erection work.
• Connectors working between 15 and 30 feet (or two stories) must be trained and wear fall protection, and be able to tie off; above 30 feet they must be protected.
• Controlled decking zones allow trained deckers to work leading edges between 15 and 30 feet under strict conditions.
• The controlling contractor must give written notice that concrete footings and anchor bolts are ready and strong enough.
• At least two bolts per connection (or the equivalent) before releasing the hoisting line, unless a specific exception applies.
• Site-specific erection plan when required; crane and rigging rules apply. See Cranes.

Key practices

• Never work under a load being hoisted, except connectors and those hooking or unhooking.
• Use multiple-lift rigging (“Christmas treeing”) only as allowed and with trained riggers.
• Install shear connectors after decking when possible to avoid trip hazards.

Connectors and deckers

• Connectors work at the point where steel members are initially joined, often sitting on the beam, guiding the piece in and placing the first bolts.
• Deckers lay and fasten metal decking, creating a leading edge as they go.
• Both need special training on the hazards of their work and the fall protection they’ll use.

Before steel goes up

• Written notice from the controlling contractor that footings, piers and walls have reached the strength needed
• Anchor bolts checked; any repairs or modifications approved by the engineer of record
• Site access and laydown area ready, with firm ground for the crane
• Site-specific erection plan where required
• Fall protection and perimeter cable plan

Perimeter cables and column anchorage

• Perimeter safety cables are installed at the final edges of each floor as soon as the metal decking is installed.
• Columns must be anchored by at least four anchor rods and designed to resist a minimum eccentric load, so they don’t topple before beams are connected.
• Guying or bracing stays in place until the structure is stable on its own.

Walking steel

Ironworkers walk beams that can be slick with rain, frost or oil. Shear studs welded on top can trip you, which is why they’re often installed after decking. Keep the steel clean, use fall protection, and don’t rush. Never walk under a piece being hoisted, and use tag lines to control loads.

Last updated: October 1, 2026