9
H+d max. = 4000 mm
B max. = 1280 mm
H+d max. = 3000 mm
B max. = 880 mm
331
H
a
L
h
g
h1
h
d
a
H = stair height (without floor structure)
L = stair length
α = pitch
g = going
h = rise
h1 = rise of first tread
d = height of floor structure
B -80
B
H
L
h
g
h1
h
d
B -80
B
H
L
B
H
L
B
H
L
B
H
L
B
H
L
B
Stairs
Stepladders
Stairs 30°
B02.31.005
Stairs 35°
B02.31.006
Stairs 45°
B02.31.007
Stepladder 55°
B02.31.008
Stepladder 60°
B02.31.009
Stairs and Platforms
B = stair width
B-80 = going width (string to string)