Not everything you need to account for lives in the Revit model. Whatever doesn't gets measured outside Tangible, then added as quantities that behave like any other takeoff data.
How it works
These elements are taken off outside Tangible — from drawing sets, specifications, or your own measurements. You bring in the quantity; Tangible attaches the assembly, so the material breakdown, classification, and carbon data come with it.
Measured outside Tangible doesn't mean untraceable. Each added quantity links back to the PDF drawing it was taken off from, and you can ask the agent where any of it came from.
The Tangible team generally handles this for projects working from 2D drawings. You can also add elements yourself, either in the UI or by asking the agent.

