Spiral Staircase Design Calculation

Here below an example of a popular spiral staircase design.

Spiral staircase design calculation.

Stair calculator 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. Spiral staircase step height can be greater than the height recommended for mid flight of stairs. For convenience and flexibility this stair stringer calculator comes in two forms the automatic and manual. If you do it manually you need to start from landing platform coming down.

1 general drawing of the spiral staircase of it s measurements h the height of the staircase usually determined by the distance between the floors in your house. The walkline is located 50cm 20 from the outer handrail. Inside plumb tread points vertically plumb. D1 staircase overall diameter determined my the distance between end points of two steps which point opposite directions.

Draw a rough sketch to see where the entry step will be. The design of the future spiral staircase and the calculation of its parameters can be completely handled. When drawing manually it is better to start from the landing platform in a downward movement. The walkline is located 2 3 of the way along the stair width measured towards the inner handrail method 4.

With standard formulas you can calculate the required data for the ladder. Develop a spiral staircase layout with the obtained details. This free stair calculator determines stair parameters such as rise total run and angle stringer length based on height run tread and headroom requirement. The length of steps in the spiral staircases should not be less than 80 cm step width in the central part should not be less than 20 25 cm at the widest part nor more than 40 cm.

For example if there is a distance of 3 00 m between slabs and the space for a staircase of 100 cm radius according to its layout in space the staircase will start at the same point where it. It is worth noting that you can calculate the necessary data using the online calculator or standard formulas. The walkine is located 50 cm 20 from the inner handrail or in the centre if the stair width is less than 1m 40. Below shown is a spiral staircase design.

Inside stringer tread points winding up and around inside of stairs from top of first rise to upper floor. Draw a rough sketch on where the entry step starts. Otherwise a simple way is to use a stair calculator you find on the web. Or choose any stair calculator available on the web.

The walkline is located half way along the stair width method 3.