A metal building erector is the trade that takes a pre-engineered metal building package from a pile of steel, sheeting, and fasteners on the laydown yard to a closed-in, watertight structure. The work is sequential and unforgiving — anchor bolts set in the slab drive frame layout, the frame drives the secondary, the secondary drives the panel, and the panel drives the trim. Miss on the front end and you eat it on the back end.
The physical scope spans primary structural steel (columns, rafters, moment connections), secondary steel (purlins, girts, bracing, flange braces, eave struts), roof and wall panel systems, ridge cap and rake trim, gutters and downspouts, doors and framed openings, and the thousands of self-drilling and structural fasteners that hold every piece to the next. A good erector reads the erection drawings, knows which system they're on, and has the rigging plan in their head before the first pick.
Equally important is what a metal building erector does off the steel: coordinating crane picks with the GC and the concrete sub, staying ahead of the insulation and MEP trades, sequencing dry-in around weather, and documenting bolt torque, roof fastener patterns, and joint conditions so the manufacturer warranty actually holds up when someone reads the paperwork five years later.
This is the scope we execute every day. It's not a sideline service — it's the business.