Shop drawings show how you will fabricate and install your work: exact dimensions, connections, materials and coordination with everything around it. They move through the same review chain as product data but take longer to prepare and review. Here's how the process works and where it usually stalls.
The review chain
| Step | Who | What they check |
|---|---|---|
| 1. Prepare | Subcontractor or detailer | Field dimensions, spec requirements, coordination with other trades |
| 2. GC review | General contractor | Completeness, coordination, schedule; stamps and forwards |
| 3. Design review | Architect and/or engineer of record | General conformance with the design intent and contract documents |
| 4. Return | Back down the chain | Review stamp and comments; approve, revise or reject |
What a good shop drawing includes
- A title block with project, spec section, sheet number, submittal number and revision
- Plans, elevations, sections and details at scales the reviewer can read
- Dimensions tied to building grid lines and verified field conditions
- Materials, sizes, gauges, finishes and connections called out explicitly
- Interfaces with adjacent work: structure, other trades, rated assemblies
- Clouded and tagged changes on every revision
Delegated design: when an engineer's seal is required
Some specs make the contractor responsible for designing part of the work, such as steel connections, cold-formed framing, stairs and railings, curtain wall anchorage, or pipe and duct hanger systems. These "delegated design" submittals need calculations and drawings sealed by a professional engineer licensed in the project's state. Identify them early in the spec, because finding and scheduling an engineer can take longer than the drafting.
Where the process stalls
- Dimensions that don't match the field. Verify before drafting, not after.
- No coordination with other trades. Conflicts found in review turn into resubmittals.
- Missing companion product data. Reviewers often won't approve drawings without the data for the products shown on them.
- Unanswered questions drawn as guesses. Send an RFI instead.
- Revisions with no clouds or responses. The reviewer starts from scratch, and the clock restarts.
Reading the stamp
"Approved as Noted" lets you proceed with the reviewer's corrections; "Revise and Resubmit" means you can't proceed until a revised set is approved. Our guide to submittal review stamps covers each response and what to do next. Track every cycle in a submittal log so the schedule impact is visible.
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