Stair Calculator: IRC Winders

By RAINBOW TREE LLC on AppTrack Ninja.

Rise, run & landing code check

Enter the numbers from your drawing. The app checks the stair against IRC R311.7 (2021), winders included, and draws the plan and the section. ■ Winders, measured the way the code does Winder treads must be at least 10 in at the walkline (12 in from the inside of the turn) and at least 6 in at any point, including the narrow end. Enter the depth at the narrow end and every winder is checked, together with winder uniformity (3/8 in), risers (7 3/4 in), treads (10 in), width (36 in, and 31 1/2 in or 27 in at handrail height), rise between floors or landings (12 ft 7 in) and handrails. ■ Feet, i…

Categories: Utilities, Productivity

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