What is the code height for stairs riser?

7 inches
Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. Stair tread depths shall be 11 inches (279 mm) minimum. The riser height shall be measured vertically between the leading edges of adjacent treads.

What is the International Code for stair treads and risers?

International Building Code for Stair treads and risers 1009.3 Stair treads and risers. Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. Stair tread depths shall be 11 inches (279 mm) minimum. The riser height shall be measured vertically between the leading edges of adjacent treads.

What are the dimensions of a stair riser and tread?

As general rules of thumb for achieving comfortable relationships between riser and tread dimensions, the following formulas can be used: ‍. Tread (inches) + 2x Riser (inches) = 24”-25” (26” for exterior stairs) Riser (inches) x Tread (inches) = 72”-75”.

How tall do stairs have to be to get a building code?

The code specifies that risers should not be more than 7 ¾ inches in height and that any variation of risers within a flight of stairs should not be more than ⅜ inch. Note that dimensions here should be taken excluding carpets, rugs, or runners. Illustration: © Building Code Trainer, 2018

What are the requirements for exterior stair treads?

Exterior stair treads must comply with all the general stair tread requirements found in IBC section 1011.5 Stair treads and risers. The minimum tread depth shall be 11 inches. Additionally, as a part of an outdoor stair walking surface, exterior stair treads must also comply with IBC Section 1011.7.2 for stair walking surface for outdoor use.

How do you figure out stair treads?

Count the number of treads, and multiply by your depth measurement. Count the number of risers, and multiply by your height measurement. Add these totals together. If your tread depth, including the nose, is 14 inches, and there are 13 treads, the tread total is 182 inches.

What is the normal rise of stair treads?

Residential risers commonly vary from 6 to 9 inches per step. Commercial construction has a maximum rise per step of 7 inches to remain ADA compliant. Basically steps in an ADA compliant building will be lower with wider treads and a wider stairway than residential construction.

How wide should stair treads be?

Stair treads can be as narrow as 22.5 inches or as wide as 36 inches. Wider stair treads are typically used outdoors while narrower designs between 22.5 inches and 30 inches are more commonly used indoors.

What is the code for stair rise?

Here are three reference numbers for the codes pertaining to rise, run, and nosing in a straight run of stairs: R 311.7.5.1 R 311.7.5.2 R 311.7.5.3.