KZQuixote
Sawhorse
Hi Big Mac,Big Mac said:Could be a code compliant winding tread. Depends on the dimensions at the narrow end and at a point 12" in from the narrow end. If the dimension at the narrow end is at least 6" and the dimension at the walkline is consistent with the dimensions of the other treads and risers, it certainly could qualify.
R311.7.4.2 ... the largest winder tread depth at the walkline shall not exceed the smallest winder tread by more than 3/8 inch (9.5 mm)... and do not have to be within 3/8"of the rectangular tread depth.
I don't see anything connecting the tread depth of the winders to the regular treads. The risers do have to be withing 3/8" over the whole stairway but not the treads.
Bill