Concrete QTO for cast-in-place / in-situ spiral stair

[lashmail]

Hi, Apologies if this is easy, but how do I calculate the volume of concrete needed to pour a cast-in-place spiral stair?

Many thanks in advance.

David

[constantin.stroescu]

View > Schedules > Material Takeoff > New Material Takeoff > Stairs > complete in Fields with Material : Name and Material: Volume