CONNECTION COUNT JOB COSTING: ERECTION STABILITY AND THE SUBPART R BURDEN
OSHA Subpart R and AISC's Code of Standard Practice put erection-phase stability on the erector: temporary bracing until the permanent system is in (COSP 7.10), minimum-bolt rules before releasing crane load, plumb tolerances (1:500).
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This page covers one problem. The full picture for this trade, including the other places margin leaks, is on the structural steel operating system page.
WHERE THE MONEY GOES.
OSHA Subpart R and AISC's Code of Standard Practice put erection-phase stability on the erector: temporary bracing until the permanent system is in (COSP 7.10), minimum-bolt rules before releasing crane load, plumb tolerances (1:500). Connection details drawn for structural efficiency without erection sequence in mind create field hazards and rework, and the erector absorbs the field fix unless the paper trail points back at the detailer.
THE COST, SOURCED.
"Fabricators who design connections purely for structural efficiency without considering erection sequence create field safety hazards and OSHA citation exposure." (2026 fabrication guide) "The erector is responsible for stability until the permanent system is in place." (AISC COSP 7.10 summary)
THE NUMBER TO MEASURE IT AGAINST.
Structural Steel contractors have about 8% net profit at $1M to $5M, rising to roughly 10% at $5M to $10M. The CFOS net profit target is 11.5% before taxes at $1M to $5M, the trade's average plus 3.5 points, never below 10%. A problem like this one lives in the distance between those two figures rather than in a loss on any single job.
Gross margin over the same bands is 23% to 24%,against CFOS targets of 25.5% and 26.5%.
THE SYSTEM THAT FIXES THIS.
Cost codes built against the estimate, so a job can be read while it is open.
