Special Inspection, Documentation and Reporting
Special Inspection: Code Framework and Duties
Special inspection is a building-code function, defined in IBC Chapter 17. The code requires the permit applicant to submit a statement of special inspections identifying which items require special inspection and who will perform them. For structural steel, the code requires special inspection of the steel construction, with the scope tied to AISC 360 Chapter N and the referenced welding and bolting standards. The inspector must be qualified and employed or retained by an approved agency independent of the contractor.
Duties and reporting
- Observe the work for conformance with approved drawings and specifications.
- Perform the required inspections continuously or periodically as the statement specifies - continuous means presence at all times the work is underway; periodic means intermittent observation at defined intervals.
- Report discrepancies immediately to the contractor and the EOR, and report to the building official - not through the contractor's chain of command.
- Maintain records and submit a final report documenting what was inspected, what was found, and how nonconformances were resolved.
Special inspection does not replace the contractor's QC, and it does not transfer design responsibility. It also does not authorize the inspector to approve deviations or stop-the-job decisions reserved to the building official, though the inspector must report conditions that warrant a stop.
Traps: placing the special inspector under the general contractor's supervision; treating periodic inspection of a continuous-scope item as adequate; assuming special inspection is required only when the EOR asks (the code mandates it when the statement lists it); assuming the special inspector signs off on design changes.
Worked example: the statement lists high-strength bolting as periodic special inspection. The erector tensions a slip-critical joint over a weekend with no observation and no calibration record. The correct response: report the unverified condition to the EOR and building official, and require re-verification before the joint is accepted - not a signature approving what no one saw.
Documentation and Reporting for Steel Construction
Documentation is the proof that inspection happened and that nonconformances were closed. A complete project file for structural steel typically contains approved design drawings, approved shop and erection drawings with current revision status, mill test reports traceable by heat number, welding procedure specifications and supporting procedure qualification records, welder performance qualification records, NDT reports with technician qualifications, bolt tension calibrator records and installation method documentation, daily inspection reports, nonconformance reports with disposition and closure evidence, and the final special inspection report.
What a good daily report contains
Date, weather (relevant to coatings and welding), location and piece marks observed, work in progress by crew, inspections performed and their basis (drawing, WPS, specification section), test results with instrument identification, samples taken and lot sizes, nonconformances noted, verbal directions given or received (which are not approvals), and the names of personnel present. Entries are factual, contemporaneous, and specific - "observed bolt tensioning at grid C2, 24 bolts, turn-of-nut, match marks verified, calibration dated 4/12" beats "bolting OK."
Nonconformance handling is a documentation discipline: identify the condition, cite the requirement, notify the EOR and contractor in writing, do not cover or conceal the work, and record the accepted disposition and re-inspection before closure.
Traps: relying on memory or a verbal sign-off; accepting a mill certificate without heat-number traceability; filing an NDT report without the technician's qualification; letting a nonconformance disappear without a written disposition; confusing an RFI or field direction with an approved change.
Rule of thumb: a report should let a stranger reconstruct what you saw, when you saw it, what standard you applied, and what happened next. If it cannot, rewrite it.