Shop Drawings

Detailed fabrication and installation drawings prepared by contractors, subcontractors, or manufacturers that translate the design intent of the construction documents into specific instructions for building individual components.

What Are Shop Drawings?

Shop drawings are detailed drawings prepared by contractors, subcontractors, fabricators, or manufacturers that provide specific information needed to fabricate and install building components. While the architect's construction documents show the design intent and overall dimensions, shop drawings provide the precise measurements, connection details, material specifications, and fabrication instructions required for production and installation.

Common Shop Drawing Types

Shop drawings are prepared for a wide range of building components: structural steel connections and erection sequences, precast concrete panels, curtain wall and storefront systems, mechanical ductwork and piping, electrical panel schedules and conduit routing, fire sprinkler layouts, elevator installation details, millwork and cabinetry, and many other specialty items.

The Review Process

Shop drawings are submitted by the contractor to the architect and engineer of record for review and approval (or notation of exceptions). The design team verifies that the shop drawings conform to the design intent, comply with applicable codes, and are properly coordinated with other building systems. Reviewed shop drawings are returned with one of several designations: approved, approved as noted, revise and resubmit, or rejected.

Shop Drawings and Construction Schedules

The shop drawing review process is a critical path item for many construction activities. Fabrication cannot begin until shop drawings are approved, and installation cannot proceed without fabricated components. Delays in shop drawing preparation, submission, or review directly impact the construction schedule. Managing the shop drawing workflow efficiently is a key responsibility of the general contractor.