hi I need help with basement stair code questions. I am replacing a basement stairway in the Kalamazoo, Michigan area that has 2 x 10 treads that require a 8-1/4 tread cut. Will I be required to enlarge the cut to 9 inches and use 2 x 12 to meet code or will a 8-1/4 cut with 2 x 10 suffice for basement stairs?
I need to make a winder due to room size constrictions. Do the three winders need to have 6 inches at the narrow end or can they come to a point as long as I have 9 inches at a 12 inch travel point from the inside?