We're designing a house where we need to use a u-shaped winder stair with a 10'-0" floor to floor rise and a 3'-6" width. The problem is related to the code requirement that the winders have a minimum tread depth of 6 inches and a minimum depth of 10 inches at the inside walkline located 12 inches from the inside.
When we create a winder in Revit 2014, the stair is created and we can edit the Inside Walk Line Offset to 1'-0". The problem arises when we try to change the Minimum Width on Inside Boundary from 2"+ to 6 inches. We get the following error:
"The relationship between the current values of Actual Run Width, Minimum Width at Inside Boundary, and Parallel Treads at Start or End does not support the creation of the winder run."
I don't see how to make the adjustment to get the stair to the configuration that would meet the code. Any assistance would be greatly appreciated.
Cashman Stahler Group