AI BIM Clash Detection: Generative Auto-Reroute Simulator

MEP Routing

HVAC duct height 3.15 m

Plumbing pipe height 2.40 m

Clearance tolerance 150 mm

Clash Report

Clashes found

Pairs scanned

Min clearance

0 mm

Worst penetration

0 mm

Scanning…

How it works

Every BIM element (a duct run, a pipe, a structural beam) is reduced to an axis-aligned bounding box (AABB), the same simplification real coordination tools like Navisworks or Solibri use for a first-pass geometric scan:

box = { min: (x0,y0,z0), max: (x1,y1,z1) }

gap on one axis:
  g = max(minA - maxB, minB - maxA, 0)

3D clearance distance:
  d = sqrt(gx² + gy² + gz²)

d = 0  → hard clash (volumes penetrate)
d < tolerance → soft clash (clearance violation)
d ≥ tolerance → clear

The scanner checks every cross-discipline pair once per frame (HVAC↔beam, pipe↔beam, HVAC↔pipe) and reports the pair with the smallest d as the binding constraint — exactly the "worst clash" a coordination engineer chases first.

AI Auto-Resolve performs a small generative search: it sweeps the duct and pipe height sliders over a grid of candidate values, re-runs the same AABB scan at each candidate, and keeps the combination that drives the clash count to zero while maximizing the minimum clearance — a miniature version of the constraint-satisfaction search real generative-design plugins (e.g. Autodesk Forma, Testfit) run across thousands of routing options.

Height sliders — move each system through the structural grid; crossing a beam's vertical band turns that intersection red.
Clearance tolerance — the minimum gap engineers require for insulation, access and thermal movement; raising it turns near-misses into flagged violations even without a literal overlap.
Structural / Electrical toggles — hide a discipline to inspect the others, the way a coordination review isolates trades one at a time.

Structural (columns/beams) HVAC duct Plumbing pipe Electrical tray Clash

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