Initial data
Lift 2500 mm
The length of the stairwells in the plan 3000 mm
Width of the track 800 mm
Total number of Steps 13
Rotary stages 3
Prior to turning steps 4
The thickness of the treads 50 mm
Tread Overhang 50 mm

Step size
Step height 192 mm
Depth steps 417 mm
The height of risers 142 mm
Interior angle rotary stages 30°

Stringer
The length of the front of the upper bowstring 2484 mm
The length of the upper bowstring full 2937 mm
The length of the front of the bottom Stringer 2070 mm
The length of the bottom Stringer full 2523 mm
The thickness of a bowstring 238 mm
Distance on the string between the gash under the stage 414 mm
The angle of the stairs 27.7° from the floor