Special Inspection Assignment on a Six-Story Steel Frame: Scope, Independence, and a Failed CJP
A six-story, 185,000 ft² steel-framed hotel is under construction under the 2018 IBC with local amendments. The engineer of record's statement of special inspections lists structural steel and bolting for the moment frames, structural welding including complete-joint-penetration welds in special moment frame connections, and spray-applied fire-resistive materials. The approved agency assigns one inspector who holds current ICC Structural Steel and Bolting and Structural Welding certifications but no fireproofing certification. The same inspector is an AWS Certified Welding Inspector employed by the approved agency. The steel fabricator has asked the agency to have its CWI 'sign off' the fabricator's own shop welds as a courtesy. The fireproofing subcontractor is scheduled for Friday, and the project manager suggests the inspector 'just measure thickness' because the certified fireproofing inspector is on another site.
1. Sort the assigned work into in-scope and out-of-scope for this inspector, and state what must happen before Friday's fireproofing application.
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Match each task to the certification's defined scope.
- Structural steel and bolting: in scope. Covers bolted connections, fit-up, snugging and pretensioning verification, and observation of high-strength bolting.
- Structural welding: in scope. Covers welds, WPS and PQR review, welder qualification review, and visual inspection.
- Spray-applied fire-resistive materials: out of scope. SFRM inspection covers substrate condition and surface preparation, ambient temperature and humidity during and after application, thickness and density verification, and cohesion/adhesion testing. Measuring thickness is not the clerical act the project manager is describing - it is the sampling pattern, the gauge selection, and the judgment about whether the application meets the specified density.
Before Friday, the agency must either reassign a certified SFRM inspector, engage a qualified subconsultant acceptable to the engineer of record and the authority having jurisdiction, or accept a written delay. The inspector must not sign the SFRM report or initial the thickness log, because a signature is a representation of competence the credential does not support.
Notify in writing now, not Friday. A short memo to the contractor, engineer of record, and owner's representative stating that SFRM special inspection is not covered by the assigned inspector's credentials and that application cannot proceed without a qualified inspector. That memo moves the schedule risk to where it belongs and protects the agency.
2. Evaluate the fabricator's request that the agency's CWI sign off the fabricator's shop welds. Is there a way to structure it that preserves independence?
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Refuse as proposed. Special inspection exists to give the authority having jurisdiction and the engineer of record an independent verification of the installer's work. When the inspected party requests, directs, or receives the inspector's acceptance signature as a convenience, the function collapses into the installer's own quality control.
The testable question is not whether the agency is a separate company on paper. It is whether the agency has a financial interest in the work and whether the entity being inspected controls the inspector's engagement or output. If the fabricator is paying for, scheduling, or receiving the sign-off, that is a conflict regardless of corporate structure. Most programs also bar the special inspector from being an employee of the installer during the covered work.
What can be structured:
- The fabricator's own quality program may have its own CWI verify shop welds - that is the fabricator's responsibility and its own record.
- The approved agency may perform special inspection of the same welds under a contract with the owner or the engineer of record, reporting to them and to the AHJ, not to the fabricator.
- Keep the two paper trails separate: the special inspection report goes to the engineer of record, the AHJ, and the owner's representative. It is not routed to the fabricator for approval.
Document the refusal in writing and copy the engineer of record.
3. A complete-joint-penetration weld in a special moment frame connection is rejected by ultrasonic testing. Describe the inspector's immediate actions and sequence.
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1. Hold the work. The connection is a hold point. No repairs, no splicing, no fireproofing, no cover-up of the joint or adjacent work until the engineer of record directs.
2. Preserve the record. The discontinuity report with indication type, location, length, and depth where available; the welder identification; the WPS; the ultrasonic technician's certification and equipment calibration; and photographs of the joint and the surrounding connection.
3. Notify. Engineer of record first - same day for a rejectable CJP in a seismic-force-resisting system, and no later than the next business day. Copy the AHJ, the owner's representative, and the contractor. Written notice, not a verbal heads-up on the deck.
4. Do not direct the remedy. The engineer of record decides repair versus removal, whether the joint is re-tested, and whether adjacent joints receive expanded testing. The inspector's role is to verify that the directed extent was actually implemented and that the re-test was performed by a qualified technician.
5. Release only after the repair or replacement is complete, re-tested, and the engineer of record has accepted it in writing. Then re-inspect any affected fireproofing.
Keep the failed test results in the report file. If the connection was already covered, that fact must be disclosed rather than quietly resolved.