How to Prepare for a Structural Special Inspection?
Prepare by having the approved structural drawings and calculations on site, the work complete and accessible (not covered up), the special inspector's scope letter understood, and all prior corrections resolved. Special inspections are required by IBC Chapter 17 for structural masonry, high-strength bolting, welding, concrete over certain thresholds, driven piles, and sprayed fireproofing. Failed inspections cost schedule — preparation is the whole game.
Best price · Quotes back fast · PE stamps backed by Apex Grid Engineering
What the inspector needs from you
The inspector verifies the work matches the approved drawings: rebar size, spacing, and cover before a concrete pour; bolt grades and tensioning; weld profiles and filler metal; masonry grout lift heights. Have the structural set (not just the architectural set) on site, the relevant submittals approved, and the area clean and lit. Work that is already covered — rebar buried in a poured footing — cannot be inspected and may have to be exposed.
Scheduling and sequencing
Special inspections must be scheduled before the work is concealed, and the inspector works for the owner (not the contractor) under IBC 1704. Build inspection hold-points into the construction schedule: footing steel, masonry grouting, structural steel connections, concrete placement. Same-day inspections are rarely available — give 48 hours notice minimum.
Common failure points
The most common special-inspection failures: wrong rebar size or spacing versus the drawings, inadequate concrete cover, missing or wrong anchor bolts, unapproved field welds, and grout not consolidated in masonry cells. Every one of these is a drawings-vs-field mismatch — the fix is a pre-pour walkthrough comparing the installed steel to the structural details before the inspector arrives.
The bottom line
Have approved structural drawings on site, keep work exposed until inspected, schedule 48+ hours out, and pre-check rebar and connections against the details. Covered work cannot be inspected.
Torch Engineering PLLC · (480) 490-0064 · info@torchengineering.com — PE stamping backed by Apex Grid Engineering.