MEP Coordination
Making ducts, pipes, conduit and equipment fit together before anyone builds.
Quick Answer
MEP coordination is the process of aligning mechanical, electrical, and plumbing layouts, along with fire protection and structure, so every system fits its space without conflicts. Trades overlay their routing, identify clashes, and agree on who moves. Resolving conflicts on paper or in a model is far cheaper than fixing them in the field.
The Full Picture
Ceiling cavities, shafts, and mechanical rooms are shared by many trades, each designing for its own needs. Ducts need large cross sections, pipes need slope, conduit needs access, and everything must clear structure and maintain required working space. MEP coordination is the structured effort to make all those systems physically fit.
The usual method is to overlay each trade's layout on a common background, historically with light tables and now mostly in 3D models or composite drawings. Participants find clashes, meaning two items occupying the same space or violating clearance, and then negotiate. A common rule of thumb is that systems with less flexibility, such as gravity drainage and large ducts, get priority, while flexible items, such as conduit and small pipe, move.
Coordination is typically run through recurring trade coordination meetings, with a coordinator or VDC lead managing the model and issue log. The output is coordination drawings that show agreed routing, elevations, and sleeve and penetration locations, which trades then use to prepare shop drawings and fabricate.
Timing matters. Doing the work before fabrication and installation avoids field conflicts, rework, and schedule delays. Coordination quality also depends on drawing quality: when the design documents are incomplete or inconsistent between disciplines, coordination teams spend their time on issues that should have been caught during design review.
Real Examples
Common Misconceptions
People assume: MEP coordination is the same as BIM clash detection.
Actually: Clash detection is one tool inside coordination. Coordination also covers agreeing on priorities, elevations, access, and sequence, and it can be done with composite 2D drawings as well as 3D models.
People assume: Coordination fixes a poor design.
Actually: It resolves physical conflicts, but missing or inconsistent design information still needs design team answers through RFIs and revisions.
Does MeltPlan Solve This?
Partially — adjacentMeltPlan does not run 3D model clash detection. Its design review reads 2D PDF and DWG drawings and specs and flags coordination issues between disciplines, missing information, and inconsistencies, which helps catch problems before trade coordination begins.
Catch coordination issues in your drawings earlier →Frequently Asked Questions
Who is responsible for MEP coordination?
It depends on the contract. Often the general contractor or a VDC coordinator leads, with each MEP subcontractor responsible for modeling or drawing its own scope and resolving conflicts.
When should MEP coordination happen?
After design documents are issued and before fabrication and installation, so conflicts are resolved before material is made or installed.
Which systems usually get routing priority?
Commonly those that are least flexible, such as gravity drainage and large ducts, get priority, while pressurized pipe, conduit, and cable trays adjust. Project agreements may set specific rules.
What are coordination drawings?
They are composite drawings showing the agreed routing and elevations of all trades in a space, used to prepare shop drawings and guide installation.