How to Calculate Spiral Stair?
- Step 1. Choose the measurement units, DU — mm, cm, m, inches, feet.
- Step 2. Choose the drawing color, CL — monochrome, color.
- Step 3. Choose the staircase type — left turn, LF, right turn, RG.
- Step 4. Input the stair, stairwell dimensions — total rise, Y*, staircase diameter, D**, rotation angle, RA.
* from the 1nd floor level to the 2nd floor level
* total rise = stairwell height (if top step is on the 2nd floor level)
** staircase diameter = stairwell diameter - Step 5. Input the steps parameters — quantity, Q, thickness, SW, tread radius around the central column, SF*.
- Step 5.1. Select to install the top step below 2nd floor level or keep it at the 2nd floor level, SP.
- Step 6. Input the center column parameter — metal rod diameter, POD.
- Step 7. Input the upper floor slab parameter* — thickness, ST.
* required for visualization only - Step 8. Please check all entered values, click the «Calculate» button and get a Spiral Steel Staircase design.
Plans of Spiral Staircase — Layout Notations
