Step-by-step guide to measuring ductwork on PDF drawings — rectangular, circular, and flexible duct. Including fittings, hangers, insulation, and fire dampers.
Start with plant, duct, pipe, controls and terminal schedules. Measure main routes first, then branchwork, accessories, supports, insulation and controls interfaces in a controlled sequence.
Duct, pipe and terminal schedules grouped by system, plant and accessory counts aligned with manufacturer schedules, fabrication and installation outputs separated for pricing.
This ductwork measurement & estimating guide for contractors guide is part of the Symbol Magic Pro free resource library — practical, contractor‑written advice covering HVAC takeoffs, estimating workflows, and digital best practices for the trades.