The method of staircase design
7. Determine the floor elevation and intermediate platform elevation on the ground floor of the ground floor.
The height of the ladder (the vertical distance from the leading edge to the ceiling) shall not be less than 2200 mm
4. Determine the number of steps: N / 2 (parallel double stairs)
5. Determine the length of the ladder and the height of the ladder
6. Determine the platform deep, generally platform platform and the middle platform, the depth of the platform shall not be less than the staircase ladder width.
1. Choose staircase form: double run or three runs, parallel or scissors and so on.
2. Determine the step size and step number: set step width b is 280, usually 250-320mm, according to the empirical formula 2h + b = 600mm calculate the tread height, (140-180).
Step number N = height / step height, if N is not an integer, adjust the step high.
3. Determine the width of the ladder: determine the ladder width
??? Ladder width = width of stairway - ladder width / 2
