Steel schedules rarely die in the shop. They die in the gap between design drawings and shop drawings, one slow RFI at a time. Where your fabricator's detailing happens determines how wide that gap is.
The outsourced detailing problem
Most mid-size fabricators subcontract detailing, often across several time zones. Every question becomes a relay: shop asks fabricator, fabricator asks detailer, detailer asks engineer, and the answer walks the same path back. A one-hour question costs a week. Multiply by the dozens of questions on any real structure and the schedule quietly bleeds out before steel is ever cut.
Revisions are worse. When the IFC set changes, an outsourced detailer reprices, requeues, and renegotiates. Your steel waits in line behind every other client they serve.
What in-house changes
When detailers sit in the same building as the shop, the relay disappears. The fitter walks over and asks. The detailer walks out and looks. RFIs that need the engineer go out the same morning with the model context attached, and the answer lands in the model the day it returns.
Revision absorption is the bigger win. An in-house team reprioritizes in minutes, updates the model, and feeds the shop revised drawings without a contract conversation. On fast-moving projects, that single capability decides whether the fabricator holds the schedule or becomes the excuse.
Model to machine
Modern detailing platforms like SDS/2 carry every connection, bolt, and cope in a coordinated 3D model. When the fabricator details in-house, CNC data flows from that model directly to the cutting equipment. Nothing is redrawn, retyped, or reinterpreted, so a whole class of fit-up errors dies on screen instead of on the table.
The model keeps paying after fabrication: BIM and IFC deliverables for coordination, erection drawings generated from the same geometry, and 4D schedule-linked models for clients who plan visually.
What to ask your fabricator
Who details your work, where do they sit, and what platform do they run? How do CNC files get from model to machine? What is the typical RFI turnaround in hours, not days? The answers predict your schedule better than any bar chart in the bid.
Promart details in-house in Sarnia on SDS/2, seats away from the estimators who priced the job and the shop that builds it. The group answers to President Justin Lajoie, an expert detailer with 30 years on demanding industrial work.
Related: In-house steel detailing