Spiral Staircase Design Calculation Example

Outside stringer tread points winding up and around outside of stairs from top of first rise to upper floor.

Spiral staircase design calculation example.

To calculate a spiral staircase a half spiral quarter spiral helical or even straight with a curvature you just need to think of it as straight and apply the formulas to the pitch line the pitch line is 50cm from the interior handrail or in the middle if the clearance width is less than a meter. D1 staircase overall diameter determined my the distance between end points of two steps which point opposite directions. 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. Otherwise a simple way is to use a stair calculator you find on the web.

Design of staircase examples and tutorials by sharifah maszura syed mohsin example 2. The walkline is located 2 3 of the way along the stair width measured towards the inner handrail method 4. It is worth noting that the popularity of these buildings grows literally every minute all thanks to their compactness practicality affordability and style. The walkline is located half way along the stair width method 3.

If you do it manually you need to start from landing platform coming down. Staircase with landing continuous at one end minimum maximum area of reinforcement 𝐴 𝑖 0 26 𝑓 𝑓 𝑏𝑑 0 26 2 56 500 0 0013𝑏𝑑 0 0013𝑏𝑑 a s min 0 0013bd 0 0013 1000 130 173 mm2 m a s max 0 04a c 0 04bh 0 04 1000 130 6400 mm2 m secondary reinforcement a. Open well staircase design a staircase of 1 5 m width for an office building with slab supported on a beam at the top and and on the landing of the flight at right angles at the bottom is shown in figure 2. Draw the spiral staircase plan spiral staircase design calculation.

The walkine is located 50 cm 20 from the inner handrail or in the centre if the stair width is less than 1m 40. Calculation of the spiral staircase can be done independently designs in the form of a spiral staircase can be found quite often since they can be in a private house office and even public places. Z thickness of steps usually is a geometric parameter of the material e g. The walkline is located 50cm 20 from the outer handrail.

Inside level tread points around inside level or flat as marked around a circle on the floor. H the height of the staircase usually determined by the distance between the floors in your house. Inside plumb tread points vertically plumb. Here below an example of a popular spiral staircase design.