Metal Building Erectors

Pre-engineered metal buildings arrive as a kit: frames, purlins, girts, bracing and roof and wall panels. A frame that is not braced can fall over, and thin panels are slippery. The work follows the steel erection rules, with extra concerns for roofs.

• Steel Erectors
• Roofers
• General Contractors

Before erection

• The foundation and anchor bolts are checked by the controlling contractor, with written notice of strength and layout before steel starts (1926.752)
• Erection drawings and the maker's instructions are on site
• A site-specific erection plan and a competent person are in place. See Steel Erection
• Material is stored on level ground and not stacked unsafely
• Crane, rigging and signal people are qualified. See Qualified Riggers

Frame stability

• Install temporary bracing and cables as soon as the first frames are up. Do not rely on the crane to hold a frame.
• Bolt columns to anchor bolts using the required number of bolts before releasing the load; follow the engineer's rules.
• Do not release a rafter until it is secured at both ends.
• Keep material and workers away from unbraced frames. Watch the wind; large frames can catch it like a sail.

Fall protection

• In steel erection, fall protection is required at more than 15 feet above a lower level, with some exceptions for connectors. See Personal Fall Arrest Systems.
• Workers on roofing may need guardrails, safety nets, warning lines or fall arrest depending on the work. See Roof Work.
• Use safe access, such as ladders extending above the edge and lifts. See Aerial Lifts.
• Take care with skylights and thin panels that cannot support a person. See Fragile Surfaces.

Panel work

• Handle sheets with gloves and carry them flat in low wind. Use two people or lifting equipment.
• Metal panels with oil or dew are very slippery. Avoid walking on wet panels.
• Fasten panels as you go. Do not leave loose sheets on the roof, since wind can blow them.
• Cover or guard openings. Keep sharp edges and trimmed pieces picked up.
• Use fastening tools with proper guards and wear hearing and eye protection.

Last updated: October 8, 2026