Shop drawings
Shop drawings are detailed drawings prepared by a contractor, fabricator, or supplier showing how a specific element will actually be fabricated and installed.
Also written as shop drawing, fabrication drawings.
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Reviewed by Eric Collin · President and Founder of Firmo Construction, 20+ years in preconstruction and bid evaluation
They are distinct from the design drawings. The architect and engineer show what is required; the shop drawings show what will be built — actual dimensions, connection details, fabrication tolerances, and the coordination with adjacent work. Structural steel, curtain wall, millwork, and ductwork all depend on them.
They are reviewed as submittals rather than approved as design, and the distinction is legally meaningful: review confirms general conformance with the design intent and does not transfer responsibility for dimensions or fabrication back to the designer.
For bidding, the question is who prepares them and whether that cost was carried. Delegated design scopes push real engineering onto the trade contractor, sometimes requiring a licensed engineer's seal, and a bidder that did not read the delegation may have priced drafting where an engineering fee was required.
They are also a schedule item on the critical path for every long-lead item. Fabrication cannot begin until the shop drawings are through review, so the review duration belongs in the schedule as a real activity rather than an administrative afterthought.
- Submittal
A submittal is documentation a contractor provides for review before fabrication or installation — product data, samples, or shop drawings — showing that what will be supplied meets the specification.
- Long-lead item
A long-lead item is material or equipment whose manufacturing and delivery time is long enough that it must be ordered well before it is needed, or it will delay the job.
- General requirements
General requirements are the Division 01 specification sections that set the administrative and procedural rules of a contract — submittals, meetings, closeout, quality control, and site conduct.
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