MEP Clash Detection & Clearance Training Lab

Service A Service B Insulation Envelope Clash Clearance deficit

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Clash register

Log each checked clash, then export the set as a coordination schedule or a BCF file for Navisworks, Revit, Solibri or BIM Track.

Clash ID	Grid	Discipline A	Discipline B	Type	Status	Gap provided	Gap required	Reroute instruction

BIM coordination primer

Find it in the model, not on site

Clash detection overlays every discipline model in one federated space and tests them against each other for physical overlaps and for missing clearances. Each hit is a problem you can fix with a mouse instead of a grinder. This tab walks through the tools people use most, what a reliable test needs, and why it pays back.

4clash test types: hard, clearance, duplicate, workflow

6discipline models in the sandbox below

BCFopen format that carries issues between tools

Federated model sandbox

A small ceiling void with structure, HVAC, chilled water, fire protection, electrical and drainage. Toggle models, set up a test the way each tool does it, run it, then click a result to zoom to it.

Work as

Selection tree

Clash test

Selection A

Selection B

Test type

Tolerance

Clearance distance

Group results by element in A

No test run yet

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Results

Pick two selections and press Run test.

Clash matrix click a cell to run it

Clash types

Level of development (LOD)

Clash result reliability

Coordination workflow and the tools that run it

Stages run in this order on every model drop. Click a stage for detail, or click a tool to see which stages it covers.

Why clash detection matters

Relative cost to fix the same clash, based on the widely quoted 1-10-100 rule of thumb. Illustrative, not project data.

Rework and waste. Cut, re-hang and re-test on site costs labour, material and time that a model change does not.
Programme. One blocked route stops the trade behind it. Clashes found early keep install sequences clean.
Safety. Fewer improvised fixes at height, fewer unplanned hot works and core drills.
Maintainability. Clearance tests protect valve, damper, filter and panel access for the building's whole life.
Compliance. Keeps authority clearances, fire-rated penetrations and electrical separation from being traded away on site.
Decisions with evidence. Every issue carries a location, a view, an owner and a status, so meetings close items instead of arguing them.

What a reliable clash test needs

Coordination readiness

Field notes

ENGINEER’S NOTES

Practical notes from running coordination on high-rise, hospitality and mixed-use projects.

About this lab: MEP Clash Detection & Service Clearance Training Lab

VERIFY ALL FIGURES AGAINST CURRENT MANUFACTURER DATASHEETS AND LOCAL AUTHORITY REQUIREMENTS BEFORE DESIGN SIGN-OFF.

Clash Detection Lab