Full drawing of the spiral staircase

Full drawing of the spiral staircase

Initial data
Lift 2700 mm
Diameter of stair 2000 mm
Internal diameter 100 mm
Number of steps 11
The rotation angle of the stairs 450°
The thickness of the treads 50 mm
Step height 245 mm
Angle step 40.9°
length of the stage 950 mm

Additional sizes of steps
Step width 699 mm
width of the workpiece stage 746 mm