Standard Stair Tread Rise And Run

1910 24 e angle of stairway rise fixed stairs shall be installed at angles to the horizontal of between 30 deg.

Standard stair tread rise and run.

We describe how to translate the stair rise and run into a specific number of stair treads and risers that will be uniform and of proper safe dimension. This is the surface that the user steps on. The run is the measurement of the tread which needs to be a minimum of 10 inches if the tread has and overhang on it see image. 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.

1910 25 a application this section covers all stairways including standard spiral ship and alternating tread type stairs except for stairs serving floating roof tanks stairs on scaffolds stairs designed into machines or equipment and stairs on self propelled motorized equipment. Rise r 7 3 4 run r 10 r r 17 3 4 good 2r r 25 1 2 within range stair will be comfortable. The tread is the horizontal section of each stair sometimes called the run. They use the term tread instead of run but i think that s the cause of some confusion so i ll use the standard term run irc code limit stair.

In my days as a carpenter i learned two different. Application this section covers all stairways including standard spiral ship and alternating tread type stairs except for articulated stairs stairs that change pitch due to change in height at the point of attachment such as those serving floating roof tanks stairs on scaffolds stairs designed into machines or equipment and stairs on self propelled motorized equipment. This is a measurement from the nose of the tread to nose of the tread. It is also the approach space at the top and bottom of the stairs.

The section of the tread that overhangs the riser below. 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. We include a table giving standard access ramp ladder and stair specifications for slope angle and rise run measurements for stair treads for various types of stairs ramps and ladders. Stairs australian standard as1657 as1657 stairs details.

A landing is a platform between two flights of stairs. Stair width fixed stairways shall have a minimum width of 22 inches. The irc code does not allow a distance greater than 7 of an inch from one step tread to the next. Any uniform combination of rise tread dimensions may be used that will result in a stairway at an angle to the horizontal within the permissible.

Includes risers and going ration.