Procedures Missing for a Field-Modified Connection
A fabricator is erecting a 3-story steel frame. At column line C, the erector finds that a moment connection's beam stub was fabricated 1.5 inches short of the design dimension because of a shop drawing transposition. The EOR has approved a field fix: add a 1.5-inch filler plate and weld the beam to the plate with a complete-joint-penetration groove weld, then bolt the plate to the column flange. The fabricator's written welding procedure covers shop CJP welds in the flat position only. The field crew is working overhead in the vertical position. The field superintendent says the crew has done 'similar work before' and can proceed if the QC inspector signs off visually. The QC inspector is on site but the fabricator's written procedure does not address field overhead CJP welding, preheat for the 1.5-inch plate, or post-weld inspection.
1. What documented-procedure deficiencies exist, and what should happen before the field crew welds?
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The written procedure does not cover the actual work. Deficiencies:
- Position: the procedure covers flat-position shop welding; the field work is vertical/overhead. Position is a qualification variable.
- Thickness: the 1.5-inch filler plate exceeds the thickness range in the shop procedure. Preheat and interpass requirements for that thickness are not documented.
- Location: field welding of a CJP moment connection is not covered by a shop procedure.
- Inspection: post-weld inspection (UT or RT per the EOR's requirements) is not specified.
Before welding, the fabricator should obtain or write a field welding procedure covering the position, thickness, and preheat, have it reviewed by the EOR, and confirm the welders are qualified for that position and thickness. The 'we've done similar work' justification is not a substitute for a documented, approved procedure. Visual sign-off by the QC inspector does not cover the missing preheat and inspection requirements.
2. The field superintendent argues that stopping to write a procedure will cost two days and the general contractor is already behind. How should the fabricator's quality manager respond, and what is the documented-procedure argument?
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The quality manager should frame the two-day delay against the cost of a failed CJP moment connection in a 3-story frame: removal, re-welding, re-inspection, and schedule impact measured in weeks, plus potential structural risk. A documented procedure is not paperwork for its own sake - it is the basis for preheat control and inspection acceptance, and it is what the EOR's approval depends on.
A practical response: draft the field procedure within a day using the shop procedure as a base, add the position, thickness, preheat, and inspection requirements, and route it to the EOR for same-day or next-day review. The crew can stage materials and prepare the joint while the procedure is approved. This limits the delay to the approval cycle rather than a full stop. The quality manager should also note that the EOR approved the field fix, which implies the EOR expects a controlled weld - proceeding without a procedure undermines that approval.