9
Pitch
Stairs and stepladders can be designed with various
pitches depending on the intended function or available
75° inclusive, it is called a stepladder.
The recommended pitch to ensure comfortable
stairs is between 30° and 38°. If the available space
is limited, you can choose 45° stairs or a 55° or 60°
stepladder.
3
2,5
2
1,5
1
0,5
space. If the pitch is between 20° and 45° inclusive,
it is called stairs; if the pitch is between 45° and
0
5 4,5 4 3,5 3 2,5 2 1,5 1 0,5 0
330
30° 35° 45° 55° 60°
Stairs
Stairs and Platforms
Notes/Technical Data
Stairs are made from mk 2040.68, mk 2040.69 and
mk 2040.06 (40x160) profiles. The profiles used in
the stairs have a slip-reducing surface structure.
The screw connections in the T-slots eliminate the
need for machining components.
The incline angle and the number of steps are
determined according to DIN EN ISO 14122-3. For
stairs, the going (g) must be between 210 mm and
310 mm, and the rise (h) and going (g) must satisfy
the formula 600 < = g + 2h < = 660. For stepladders,
the going (g) must be at least 80 mm and the rise
(h) must be between 150 mm and 200 mm for a
pitch (α) < = 60°.
For stairs, the rise of the first step (h1) may be
reduced by 15% relative to the general rise (h). For
stepladders, the rise of the first step (h1) may be
reduced by up to 50% of the general rise (h) and
raised by 15 mm. For stairs, the going width should
be at least 800 mm. For infrequently used stairs,
the going width may be reduced to 600 mm; for
stair heights up to 1500 mm, the going width may
be reduced to 500 mm. For stepladders, the going
width (string to string) must be between 500 mm
and 800 mm; the preferred going width is 600 mm.
Stair height H m
Stair length L m
Sample order:
Stair height (H) = 2490 mm
Height of floor structure (d) = 10 mm
Stair width (B) = 880 mm
Pitch (α) = 35°