BIM Coordination for MEP: How Clash Detection Saves Projects
Every service that clashes on site costs ten times what it costs on screen. Here's how disciplined BIM coordination turns MEP from the riskiest package into the most predictable one.
Mechanical, electrical and public health services compete for the same ceiling voids, risers and plant rooms — designed by different parties, often at different times. BIM coordination is how professionals resolve that competition before it reaches site, where every discovered clash means delay, cost and compromise.
What clash detection actually is
Each discipline's 3D model — structure, architecture, ductwork, pipework, cable containment, sprinklers — is federated into one environment. Software then finds every place where two objects occupy the same space (hard clashes) or violate required clearances (soft clashes: maintenance access, fire barriers, gradient requirements). Each clash is logged, assigned, resolved and re-verified in scheduled coordination cycles.
LOD: the language of model maturity
Level of Development defines how much a model can be trusted. LOD 200 gives approximate placeholders; LOD 300 gives accurate size and position — the minimum for meaningful clash detection; LOD 350 adds the interfaces and connections needed for true construction coordination; LOD 400 is fabrication-ready. Asking “what LOD is this model?” is the first question of any serious coordination process.
The payoff, in numbers that matter
Resolving a duct-versus-beam conflict on screen takes minutes. On site it means stopped trades, redesign under pressure, wasted fabrication and a programme hit — industry studies consistently put field rework at 5–15% of construction cost, most of it avoidable through coordination. Beyond clash-avoidance, a coordinated model yields accurate builders'-work drawings, prefabrication opportunities, exact material take-offs and an as-built record worth having.
Consultant and contractor in one
AVC sits on both sides: we produce and coordinate the models, and we install from them. That closes the loop that usually breaks — the modeller who never builds, and the installer who never models. One team, one model, one standard of accountability.
Frequently asked questions
- Is BIM only worthwhile on large projects? +
- No. High-end residential projects benefit enormously — tight ceiling voids, premium finishes and zero tolerance for visible services make coordination more valuable, not less.
- What software does AVC use for BIM coordination? +
- Revit for modelling, with industry-standard federation and clash workflows (Navisworks-class tooling), AutoCAD for 2D deliverables, and IFC exchange so we integrate with any design team.
- What's the difference between clash detection and coordination? +
- Clash detection is the software finding conflicts. Coordination is the human process — prioritising, resolving, re-checking and signing off — that turns a clash list into a buildable design.
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