Stair riser code

Choose from a large selection of tiered riser s and portable platforms. What is the minimum height for a stair riser? Do exit stairs require nosings?

All of these measurements include the finished flooring, so don’t forget to take those thicknesses into account when planning your stair dimensions. Here are three reference numbers for the codes pertaining to rise , run, and nosing in a straight run of stairs : R 311. You can view the code in its entirety here. The International Residential Code dictates stair code requirements specific to residential buildings.

The IRC stairs code states that the minimum width for stairs be no less than inches. There are also codes in place for standard stair tread dimensions. IBC stairs must have the same riser and tread dimensions throughout the stairway.

Riser height and tread depth shall be uniform within each flight of stairs, including any foundation structure used as one or more treads of the stairs. GENERAL All stairs are required to comply with the following: 27. TREADS AND RISERS On any given flight of stairs , all steps shall ha ve uniform riser heights and unif orm tread w idths. Open risers are not permitted. NOSINGS The undersides of nosings shall not be abrupt.

The rise of steps and stairs must not be less than four inches nor more than eight inches. The greatest riser height within any flight of stairs must not exceed the smallest by more than three-eighths inch. The run must not be less than nine inches.

In every building four or more stories in height, one stairway shall extend to the roof surface, unless the roof has a slope greater than in 12. Every required stairway shall have a headroom clearance of not less than feet inches. Free 2-day Shipping On Millions of Items. Portable, Easy-to-use. Find the Right Size for You Today!

The tolerance between the largest and smallest riser height or between the largest. The minimum tread depth is inches. If the stairs have nosings, you measure from the leading edge of the nosing to the edge of the next step’s nosing. Thus it varies by state and town. In all cases, each jurisdiction has amended the code to reflect local concerns.

The riser shall be measured vertically between leading edges of the adjacent treads. For the purposes of this section, dimensions and dimensioned surfaces shall be exclusive of carpets, rugs or runners. If those steps have a rise 0f then the space in the open riser would be or less and pass code.

That glass is most likely laminated AND tempered and again, the space between seems to pass muster. Stair Riser height Requirements. For residential stairs , the code specifies the minimum stair head height, stair width and landing dimensions, as well as the maximum size of risers , treads and handrails.

Vertical clearance above any stair tread to any overhead obstruction is at least feet, inches (2cm), as measured from the leading edge of the tread. Spiral stairs must meet the vertical clearance requirements in paragraph (d) (3) of this section. Building code states that the minimum width of a landing should not be less than the width of the flight of stairs that is served.

Where the stairway has a straight run, the depth in the direction of travel shall be not less than inches (9mm).