Learn basic staircase code dimensions, such as staircase width, riser height, tread depth, and staircase. Step riser specifications riser height (:in. Maximum nosing radius: 9in: Minimum tread depth in.
Building codes generally suggest that the minimum length of a tread be inches (2 cm). Building Code states the following: The rise of steps and stairs shall not be less than inches nor more than inches. Riser height and tread depth. The greatest riser height within any flight.
See the International Existing Building Code for the replacement of existing stairways. May Do your stair tread nosing meet these codes ? Each tread and riser must be of the same measurement within a single flight.
The riser shall be measured vertically between leading edges.