Winder Tread or Step Minimum

 

building code winder type stairway design tread measurements

The only way we can validate this particular building code will be to verify the exact location of the winder walkline.

The minimum tread depth for a winder type design stairway is 11 inches and will be measured horizontally along the walkline between steps, from face of nosing on the upper step to face of nosing on the step you're measuring.

Reference: 2012 International Building Code - 1009.7.2 page 254

minimum winder stair design step or tread width or depth

Attention: Don't forget to check with your local building department to verify any building codes on this website. This information could be incorrect or outdated. Building codes are updated regularly and to some building departments have different interpretations for certain building codes.