Steel Detailing Support for General Contractors

Steel detailing sits on the critical path between subcontract award and steel arriving on site. Shop drawings must be detailed, reviewed and approved before fabrication starts, and fabrication must finish before erection. A detailing delay or a slow approval cycle moves every date after it, which is why the steel submittal deserves tracking from the day the package is sent.

On Vertex's published reference project, the package went from Rev A for approval on September 3, 2026, to Rev 0 for fabrication on September 9, 2026. That included review time and was one package, so treat it as a data point rather than a planning figure.

On a typical US project the steel fabricator is responsible for shop and erection drawings under AISC 303, and the fabricator either details in-house or engages a detailer. The general contractor holds the fabricator's subcontract and manages the submittal, not the detailer directly. Vertex works within whichever chain your contracts set up.

That chain matters for RFIs and approvals: questions and submittals flow from detailer to fabricator to general contractor to the design team, and answers flow back. If you are arranging steel detailing yourself, for example on a misc metals scope or before a fabricator is selected, confirm at intake who holds responsibility for the drawings under your contracts.

Steel submittals are organized by specification section, issued with a transmittal that lists every sheet and its revision, and tracked from the approval issue to the fabrication release. On the reference project, the approval issue was Rev A and the fabrication issue Rev 0, so anyone reading a sheet could tell whether it was cleared to build.

Before any submittal is issued, every drawing is checked by a second person who did not draw it. The sequence is on the quality control page.

Vertex drafts steel RFIs with sheet, grid and detail references and sends them through the contractual chain to the Engineer of Record or architect. Each RFI is logged with its status. Pieces affected by an open question are held or flagged on the drawings, so detailing continues elsewhere without building on assumptions.

The team works in India, 9 hours 30 minutes ahead of US Eastern Daylight Time, so an answer that reaches the team at the end of the US day is typically worked into the model during the US night. The RFI log gives you a factual view of which questions are holding the submittal and who they are waiting on.

The SDS/2 model covers the steel, and clash review inside SDS/2 catches steel-to-steel conflicts before drawings are issued. Coordination with mechanical, electrical, plumbing and architectural models happens in the project team's own coordination process, using an IFC export of the steel model. Conflicts found there come back to detailing as RFIs or changes.

Being clear about that split avoids a common assumption: a detailer's clash review is not a multi-trade coordination review. If your project runs model coordination meetings, ask for the IFC export at intake and agree how often it is refreshed as the steel model develops.

Erection drawings give the erector and your site team the plans, elevations and sections that show where every piece mark goes, with field connection details and field bolt lists. Where they are in scope, anchor rod setting plans and embed layouts come first, because concrete work depends on them. Site logistics and the erection sequence build on these sheets.

Piece marks on the erection drawings match the ship marks on the shop drawings and on the pieces delivered to site, so the crew can find and set each member without guessing. See erection drawings for what each sheet contains.

Miscellaneous steel, such as stairs, handrails, ladders, embeds and canopies, is often a separate specification section and sometimes a separate subcontract. Its biggest schedule risk for a general contractor is embeds: they must be detailed, approved and delivered before the concrete pours they are cast into, so they are released ahead of the rest of the misc steel.

Stairs and rails depend on floor-to-floor heights and slab edges built by other trades, so their drawings carry field-verify notes where conditions are not yet built. See miscellaneous steel detailing for how each item is detailed.

Vertex charges $15–20 USD per hour, varying with connection complexity, miscellaneous steel density, revision volume and turnaround pressure. Who pays depends on your contracts: in most cases detailing is part of the fabricator's price, and the general contractor pays for it through the steel subcontract rather than directly. Design changes that add detailing hours usually flow through change orders.

The steel detailing rates page explains what moves a package within the range and how detailing is commonly quoted. How a package moves from documents to fabrication release is on the process page, and structural steel detailing covers the full scope of a primary framing package.