Stair Design Tread Riser Ratio

This free stair calculator determines stair parameters such as rise total run and angle stringer length based on height run tread and headroom requirement.

Stair design tread riser ratio.

The standard width of any stair may be between 1 1 to 1 6 m. The stair calculator is used for calculating stair rise and run stair angle stringer length step height tread depth and the number of steps required for a given run of stairs. Design of staircase calculation how to calculate rise and tread dimensions. For convenience and flexibility this stair stringer calculator comes in two forms the automatic and manual click on the icons to determine the best calculator to use for your stairs.

The riser tread relationship is a significant factor in stair safety. In public use building like malls cinema shopping center larger width of stair can be used. Total required number of tread total stair tread or run width of one tread 90 10 9 tread. At stair riser specifications and at stair dimensions width height you ll read that stair risers should be 7 inches 178 mm maximum and 4 inches 102 mm minimum.

We would need change the stair tread depth to make a 37 slope stair that has an acceptable 7 inch riser height. Tread and rise calculation. Stair dimensions are calculated using a ratio for the proportion of the riser to the tread that is determined to be safe and comfortable. Please make use of the below calculator input the values.

Explore a number of building and housing related calculators as well as hundreds of other calculators involving topics such as finance math fitness health and more. Having the right calculations before getting started can make the task a lot easier. Or if your design allows you could have 18 risers at 6 56 with a run of 12. While planning any stair important dimension to find out first that is rise and tread of stair and their numbers.

Interior stairs have a different ratio than exterior stairs. 7 riser height tread depth y 0 7535 37 slope. Building stairs for your deck is often considered the most difficult part of the construction project. Just be aware that some building codes specify a maximum number of risers from landing to landing and that shorter risers results in more treads and greater tread depth extending the overall run of the stairs.

The standard acceptable range of dimensions for exterior treads is 11 to 18 inches. Treads the horizontal faces of each step should be sized depending on the dimension of the risers. Staircase calculation formula is. Total required number of risers total stair rise height of one rise 60 6 10 riser.