Schematic of the stairs
Drawing turning-speed
Drawing Template stages
Drawing the bowstring
Recommendations
Deviation from the formula for 12.5%
We recommend reducing the number of steps more on 1The lack of depth of step: 260 mm
Recommend increasing the protrusion F on 20 mmConvenient staircase inclination 36.9°
An Inconvenient stair
Initial data
The height of the stairs 2520 mm
The length of the stairwells in the plan 1850 mm
Width of the track 800 mm
Stages in the upper span 5
The average flight of stairs 2
Stages in the lower span 3
Rotary stages 6
The thickness of the treads 50 mm
Tread Overhang 50 mm
The calculation results
The length of the upper bowstring full 1574 mm
The length of the front of the upper bowstring 1313 mm
The average length of a bowstring full 1049 mm
The length of the front of the middle of a bowstring 788 mm
The length of the bottom Stringer full 1311 mm
The length of the front of the bottom Stringer 1050 mm
The thickness of a bowstring 196 mm
The distance on the bowstring between prosaws on stage 263 mm
The angle of the stairs 36.9° from the floor
Depth steps 260 mm
Step height 158 mm
The height of risers 108 mm
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