MANUAL - Lichtgitter GmbH

Serrated pressure-locked gratings with serrated bearing
and/or cross bars are approved by the Occupational Safety
Authorities. Various anti-slip categories have been established
to provide a range of anti-slip levels. The anti-slip levels range
from category R9 to R13 (see pages 72 to 75).
Pressure-locked gratings XP Serration No. 3
Bearing bars Pitches
Bearing bar pitch Cross bar pitch
20 x 2 mm 33,33 mm 33,33 mm
25 x 2 mm
30 x 2 mm Serration no. 3 is also possible with
40 x 2 mm bearing bars of 4 and 5 mm thickness
20 x 3 mm
25 x 3 mm Other pitches with serration no. 31, 32,
30 x 3 mm 2, 22 and 4 on request.
40 x 3 mm
Materials S 235 JR ( ^ = St 37-2), S 355 J2+N ( ^ = St 52-3)
stainless steel 1.4301, 1.4571 (not 20 x 2)
Aluminum AlMg 3 G 22, AlMg 1 F 15
Surfaces see pages 76 / 77
25
P Pressure-Locked Gratings
Pressure-locked gratings with narrow pitches are used as entrance
doormats in pedestrian traffic areas and public places.
These gratings are also recommended in the „Berufsgenossenschaft“
professional association’s instruction sheet BGI
588. The length of bearing bars should follow the direction of
travel, but if they can only be installed in a different direction,
they should be serrated.
Pressure -locked gratings P Narrow pitch
Bearing bars Pitches
Bearing bar pitch Cross bar pitch
20 x 2 mm * 22,22 mm 11,11 mm
25 x 2 mm 33,33 mm 16,65 mm
30 x 2 mm 44,44 mm
40 x 2 mm
25 x 3 mm
30 x 3 mm And a multiple of pitches above.
40 x 3 mm
Materials S 235 JR ( ^ = St 37-2)
Stainless steel 1.4301 and 1.4571
Aluminum AlMg 3 G 22, AlMg 1 F 15
Surfaces see pages 76 / 77
Bearing bars marked * cannot be supplied in stainless steel
Pressure-locked Gratings