General drawing a di staircase

steps

Step sizes

Bowstring part sizes

Initial data
Stair height 2500 mm
Length a di staircase opening inna plan 3000 mm
Stair width 900 mm
Number a steps 13
Step thickness 50 mm
Overhang a steps 50 mm
Bowstring thickness 60 mm

Amount a material fi one string 5390 mm
Stair angle 39.8°

Step sizes
Step height 192 mm
Step depth 281 mm
Riser height 142 mm
Area a �all steps 3.285 m²