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Quantity take-off for heating pipework

Supply and return heating pipework on three floors, modelled in 3D and turned into isometric drawings with every pipe run numbered and measured – so the contractor knows exactly what to order and the investor exactly what is being billed.

Building

Healthcare facility, 3 floors

Scope

Isometrics and bill of materials, supply and return

Tools

SolidWorks · 3D pipework, automatic BOM

Deliverables

12 A1 sheets, PDF

The challenge

Floor plans do not tell you how many metres

Counting pipes and fittings off 2D plans is slow and error-prone: risers, offsets and connections to radiators are easy to miss. The result is either a shortage on site or surplus material – and a bill that is hard to check.

The task was to produce a quantity take-off that the contractor can order from and the supervisor can verify, line by line.

Dimensioned isometric of the supply pipework — Supply pipework, 1st floor – every run dimensioned in mm.

The solution

Model once, count automatically

The pipework was modelled in 3D, so lengths and fittings come straight from the model instead of a ruler.

Separate isometrics for supply and return on every floor, colour-coded red and blue
Two sheets per isometric: one with numbered positions, one fully dimensioned
Bill of materials with every position, quantity and cut length
Summary tables of pipes per diameter, elbows and tees – ready for an order
Every number traceable on the drawing – easy to check for billing
A change in the model updates the quantities in minutes

In numbers