Coordination Drawings
Composite drawings that prove every trade physically fits before anything is installed.
Quick Answer
Coordination drawings are composite drawings that overlay the work of multiple trades — ductwork, piping, conduit, sprinklers, and structure — on a single view to prove everything physically fits. They are produced during coordination to resolve spatial conflicts before fabrication and installation, turning an abstract clash-free model into buildable, dimensioned field documents.
The Full Picture
Coordination drawings exist to answer a question a single-discipline drawing can't: does everyone's work actually fit together in the real space? Each trade's own drawing shows only its scope. Overlaying them on one composite view exposes where a duct, a pipe, a conduit run, and a sprinkler main all want to occupy the same slice of a congested ceiling.
Mechanically, coordination drawings are produced by combining trade models or drawings, resolving the conflicts that appear, and documenting the agreed layout with real dimensions and elevations. On BIM projects they're extracted from a coordinated federated model after clash detection; on 2D projects they're built by hand as composite or combined-services drawings. Either way, the deliverable is a set the trades sign off on and install from.
In practice, congested areas drive the effort: mechanical rooms, hospital corridors, lab ceilings, and central plants. Trades sequence their installations from the coordinated drawings — who runs first, at what elevation — so the second and third trades still have room. A good coordination drawing set is the difference between a smooth install and a field full of relocations.
For preconstruction and VDC, coordination drawings are both the proof and the product of coordination. The clash-free model shows conflicts are resolved; the coordination drawings are what actually get built. Missing or sloppy coordination drawings push conflict resolution into the field, where it becomes rework, delay, and finger-pointing between trades.
Real Examples
Common Misconceptions
People assume: Coordination drawings are the same as the design drawings.
Actually: Design drawings show intent per discipline; coordination drawings combine trades and resolve exactly how their work fits in shared space, with installation-level dimensions and elevations. They're produced during coordination, usually by the contractor or trades, not by the design team as part of the CDs.
People assume: If the BIM model is clash-free, coordination drawings aren't needed.
Actually: A clash-free model proves conflicts are resolved, but the crews in the field install from drawings. Coordination drawings translate the coordinated model into dimensioned, signed-off sheets trades can fabricate and build from — the model is the check, the drawings are the deliverable.
Does MeltPlan Solve This?
Partially — adjacentPartially — MeltPlan reviews your drawings and flags coordination issues between disciplines, which is the problem coordination drawings exist to solve. What it does not do is produce the composite coordination drawings themselves; that is a VDC or trade deliverable created in modeling software. MeltPlan works at the document level on 2D PDFs and DWGs to catch conflicts, not to draft the coordinated overlay.
Catch cross-discipline conflicts before coordination →Frequently Asked Questions
What are coordination drawings?
They are composite drawings that overlay the work of multiple trades — mechanical, electrical, plumbing, fire protection, and structure — on a single view to confirm everything physically fits. They're produced during coordination and carry the dimensions and elevations trades fabricate and install from.
Who produces coordination drawings?
Usually the trade contractors and the general contractor's VDC team, not the design engineers. Each trade contributes its model or drawing, and the coordination process combines them, resolves conflicts, and issues a signed-off coordinated set.
What's the difference between coordination drawings and shop drawings?
Shop drawings detail one trade's fabrication and installation. Coordination drawings combine multiple trades to prove they fit together spatially. Coordination typically comes first and informs the shop drawings, so each trade fabricates to a layout that clears the others.
Are coordination drawings only for BIM projects?
No. On BIM projects they're extracted from a coordinated federated model after clash detection; on 2D projects they're produced as hand-built composite or combined-services drawings. The method differs, but the deliverable — a coordinated, dimensioned set trades build from — is the same.
Related Terms
More Preconstruction — Design Coordination Terms
- BIM Execution Plan (BEP)
- Design Milestone
- Design Freeze
- What is Prefabrication Coordination
- What is DfMA (Design for Manufacture and Assembly)
- What is a Trade Coordination Meeting