MANUAL - Lichtgitter GmbH

Production
Forge-welded gratings produced for stairtreads are produced
in the same types as used for platforms and walkways. They
are always supplied with serrated, perforated nosing and welded
side plates.
All stairtreads are inert gas welded, in special jigs.
Installation
The stairtreads in accordance to DIN can be produced regarding
the length with a minus tolerance and furthermore the
stair construction can have tolerances. So it may be necessary
to verify before srewing the treads if a washer between cheek
and stairtread is needed. Thereby possible damages of the
welding of the bearings bars to the side plates can be avoided.
Long hole type
For easy fitting to stair stringers, each side plate is always sup-
Standard stairtreads acc. to DIN 24531-1 (preferred sizes)
Type Bearing bar Dimension b c n e kg/tread
SP 330-34/38-3 30 x 3 mm 600 x 240 mm 55 70 120 85 5,2
Nominal mesh 600 x 270 mm 55 70 150 85 5,8
approx. 30x30 mm
800 x 240 mm 55 70 120 85 6,6
800 x 270 mm 55 70 150 85 7,5
800 x 305 mm 55 70 180 90 8,3
1000 x 240 mm 55 70 120 85 8,2
1000 x 270 mm 55 70 150 85 9,1
1000 x 305 mm 55 70 180 90 10,2
SP 340-34/38-3 40 x 3 mm 800 x 240 mm 55 70 120 85 8,0
Nominal mesh 800 x 270 mm 55 70 150 85 9,0
approx. 30x30mm
1000 x 240 mm 55 70 120 85 10,0
1000 x 270 mm 55 70 150 85 11,0
19
SP Standard Stairtreads
plied with one round and one slotted fixing hole.
Perforated nosing increases the anti-slip value of the stairtreads
and favourably accentuates the leading edge visually.
This is an important contribution to safety.
We reserve the right to supply stairtreads with bearing bars
thicker and higher than ordered, at no extra charge. We can offer
other types and sizes of stairtreads with perforated nosing,
depending on demand.
On request, we supply fixings for stairtreads consisting of:
Hexagonal bolts M 12 x 35 ISO 4016 (DIN 601)
Hexagonal nuts M 12 ISO 4032 (DIN 934)
Washers A 14 DIN 7989.
1200 x 240 mm 55 70 120 85 11,7
1200 x 270 mm 55 70 150 85 13,2
1200 x 305 mm 55 70 180 90 14,7
Other stairtreads ex stock
Type Bearing bar Dimension b c n e kg/tread
SP 225-34/38-3 25 x 2 mm 600 x 185 mm 55 70 95 55 3,0
Nominal mesh 700 x 185 mm 55 70 95 55 3,4
approx. 30x30 mm
SP 230-34/38-3 30 x 2 mm 600 x 205 mm 55 70 95 75 3,6
Nominal mesh 600 x 240 mm 55 70 120 85 4,2
approx. 30x30 mm 600 x 270 mm 55 70 150 85 4,6
700 x 220 mm 55 70 100 85 4,3
800 x 220 mm 55 70 100 85 4,8
800 x 240 mm 55 70 120 85 5,3
800 x 270 mm 55 70 150 85 5,9
800 x 305 mm 55 70 180 90 6,5
1000 x 240 mm 55 70 120 85 6,8
1000 x 270 mm 55 70 150 85 7,5
1000 x 305 mm 55 70 180 90 8,3
Forge-Welded Gratings