PEB Erection Process: What Happens On-Site
Quick Answer
PEB erection follows a set sequence: anchor bolt verification, primary frame erection (columns and rafters bolted and plumbed), secondary member installation (purlins and girts), bracing, and finally roof and wall sheeting — each stage depending on the previous one being correctly aligned and secured.
Before Erection Can Begin
Erection can't start until foundations have cured to adequate strength and anchor bolts have been checked against the fabrication drawings for correct position and alignment — a mismatch here is one of the most common (and costly) causes of on-site delay, since it means either re-drilling base plates or, worse, redoing foundation work.
The Erection Sequence
- Primary frames (columns and rafters) are lifted, bolted at the base and connected at the ridge, then plumbed and temporarily braced
- Secondary members (purlins and girts) are fixed between frames to create the full skeletal structure
- Permanent bracing is installed for lateral and longitudinal stability
- Roof and wall sheeting is fixed, followed by flashing, gutters and downspouts
- Doors, ventilators, skylights and any specified insulation or interior work are completed last
Common Site-Readiness Issues
The most frequent causes of erection delay aren't the steel itself — they're site issues: inadequate access for cranes, incomplete foundation curing, incorrect anchor bolt placement, or utility/drainage work that hasn't been sequenced with the erection schedule. A pre-erection site readiness check against the fabrication drawings avoids most of these.