Stair Tread Nosing Code

Risers shall be solid and vertical or.
Stair tread nosing code. Also the maximum nosing radius cannot exceed 9 16 of an inch. Stair tread dimensions measaurements step construction details code specifications. Handrail graspability to be either type i or ii with a minimum 1 1 2 inch clearance from a wall. To a maximum of 1 in.
Nosings are required to overhang a minimum of in. This document provides building code specifications for stair treads. So since the minimum tread size is 10 a nosing will extend the tread depth to between 10 3 4 and 11 1 4. 2008 new york state stair code r311 5 3 3.
The nosing on treads believe it or not has a code minimum and maximum of how far the nosing projects over the next stair. Sketches photographs and examples of defects used in inspecting the step design on indoor or outdoor stairs and their treads including the requirements for a projecting stair tread nose and the tread nose shape and dimensions. U progress dana policy stair treads international building code stair treads and risers doc 06 23 2014 1009 3 3 profile. A nosing is not required where the tread depth is a minimum of 11 inches 279 mm.
Width refers to the length of risers and treads from side to side. The leading edge of treads of stairs and of landings at the top of stairway flights. The section of the tread that overhangs the riser below. Handrail height to be placed a minimum 34 inches to 38 inches.
Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing. Beveling of nosings shall not exceed 0 5 inch 12 7 mm. The radius of curvature at the leading edge of the tread shall be not greater than 0 5 inch 12 7 mm. Ibc 1002 14a.
For code requirements the minimum staircase width is the horizontal dimension between the sidewalls of a staircase measured above the handrail s. Stair tread or landing nose or nosing definitions codes definition of stair tread nose.