SITE STAIRWAY FEATURES & BENEFITS
1. Start with the rise height required (4.2m as
shown in the table 'y' axis)
2. Draw a line across the inclination diagram
3. Choose the number of steps shown on the
top section of the scale (from 3 - 36) and
follow the curve until it intercepts with the
rise height line you have drawn, to give
inclination required (24 steps = 38º)
4. Using a straight line, track down to the
Reach Length from building (5.3m as
shown on the 'x' axis)
INCLINATION DIAGRAM
The inclination diagram is used for selecting the Stairway length.
Recommended inclination range is 25° - 50° (30° minimum for compliance with EN12811)
An example is shown in the diagram with dotted lines and should be interpreted as follows:
Features and Benefits
• Whatever the angle of the Stairway
(between 25° and 50°), the treads will
always be horizontal
• The locking mechanism ensures the stability of
the Stairway and keeps it at the correct angle
• The bottom of the stringers are shaped
to prevent slipping
• Being over 750mm wide, the Stairway
permits occasional passing if required
• Can be folded flat for ease of transport
• The Stairway is manufactured in steel
sections and has a durable galvanised
finish as standard
• The treads have a coarse expanded metal
surface for grip, which also clears muddy
footwear in use
6
1
1
2
3
4
5
6
7
8
9
50º 45º
40º
35º
30º
25º
Height (m)
2 3 4 5 6 7 8 9 10 Reach
Length from building
(m)
3
9 12 15 18 21 24 27 30 33 36
1
3
2
4
103
Site Stairway