Steel Detailing Quality Control: How Every Package Is Checked

A package passes through nine controlled steps between intake and fabrication release: document review, model review, clash review, an independent drawing check, a back-check of corrections, issue for approval, comment incorporation with a re-check, issue for fabrication, and controlled revisions afterward. Each step has a defined reference to check against and a defined output.

A detailer checking their own sheet tends to see what they meant to draw rather than what is on the page. An independent checker reads the drawing the way the shop will, cold, against the design drawings. That is how transposed dimensions, misread member sizes and missing weld symbols get caught.

The checker's markups are not advisory. The detailer corrects every item, and the checker back-checks each correction before the sheet is released. A drawing that has been corrected but not back-checked is not released. On a five-person team of detailers and checkers, the checker on any sheet is a different team member from the person who drew it.

Clash review in SDS/2 catches physical conflicts inside the steel model: members running through each other, connection plates hitting adjacent steel, bolts that cannot be installed, and weld locations that cannot be reached. It cannot catch errors carried faithfully from the contract documents, conflicts with trades that are not in the steel model, or field conditions nobody surveyed.

Those gaps are handled differently: design conflicts become RFIs, conditions built by others get field-verify notes, and multi-trade coordination uses the IFC export from the SDS/2 model in the project team's own coordination process.

The drawing checker verifies that every sheet agrees with the design drawings, the specifications, the RFI responses and your shop standards, and that it agrees with every other sheet that shares its pieces. The list below is what gets checked on shop drawings and erection drawings before either is released.

Revisions are controlled so the shop, the field and the reviewer can always tell which sheet is current. Every change is clouded and recorded in the revision block, the revision is advanced, the sheet is re-checked, and the log is updated. Superseded sheets are withdrawn; bolt lists and NC files are reissued with their sheets.

The reference project used a common convention: letter revisions for approval and numbered revisions for fabrication. Rev A was issued for approval on September 3, 2026, and Rev 0 was issued for fabrication and field use on September 9, 2026. The case study describes that package.

The rule that prevents the most expensive errors is simple: drawings, bolt lists and NC files for a release always come from the same model revision. A beam line cutting to an old NC file while the shop floor reads a new drawing is how pieces get scrapped.

RFIs are tracked in a log that records the question, the sheet and grid references, the date it was sent, its status and the answer. Pieces affected by an open RFI are flagged on the drawings rather than detailed on an assumption, so nobody fabricates a piece whose answer has not come back from the Engineer of Record or architect.

When an answer arrives, the affected pieces are updated, the change is clouded if the sheet was already issued, and the checker reviews the change before release. The RFI log is also what makes schedule conversations factual: it shows which questions are waiting, and on whom.

Quality control catches errors in the detailing. It cannot reliably catch errors in the contract documents that look plausible, field conditions that differ from the drawings, or design changes nobody communicated. Those risks are handled by RFIs, field-verify notes and the revision process, and by the approval review that AISC 303 builds into every project.

Checked drawings still need your review and the Engineer of Record's approval. The detailer's check reduces what reaches reviewers; it does not replace them. If a reviewer's comment reveals a detailing error, it is fixed, clouded and re-checked like any other revision.

Vertex Steel Detailing was founded in 2026 and does not hold third-party quality certifications. Rather than imply otherwise, it publishes the checking sequence its drawings go through, so you can judge the process directly and then judge the output on a first package. A process you can see is more useful than a badge you cannot verify.

The guide to vetting a steel detailing partner lists what to ask any detailer about checking, including questions Vertex's short track record cannot yet answer. How checking fits into the full workflow is on the steel detailing process page, and how checking effort relates to cost is on the pricing page.