1) Bearing Bar (Load Bar) Specifications (mm):
The specification of plain type and serrated type bearing bar is 25 x 3 to 100 x 8; The specification of I-section type is 25 x 5 x 3, 32 x 5 x 3, 38 x 5 x 3, 40 x 5 x 3, 50 x 5 x 3, 50 x 7 x 4, 55 x 7 x 4, 60 x 7 x 4, 65 x 7 x 4, 70 x 7 x 4, 75 x 7 x 4, etc.
2) Bearing Bar Pitch (center to center):
12.5, 25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32, 80, 100 mm etc, also be according to client's requirement and 30, 40, 60mm are recommended, America standard is available <1'' x 3/16'', 1 1/4'' x 3/16'', 1-1/2'' x 3/16'', 1'' x 1/4'', 1-1/4'' x 1/4'', 1 1/2'' x 1/4''(19-w-4) and so on. >
3) Material:
Mild Steel (Low Carbon Steel) or Stainless Steel
4) Surface Treatment:
Untreated, Painting or Hot dip galvanizing
5) Steel grating standards:
A) China: YB/T4001-1998
B) USA: ANSI/NAAMM (MBG531-88)
C) UK: BS4592-1987
D) Australia: AS1657-1985
E) Japan: JJS
Material standard | Bearing bar | Cross bar | Bearing bar pitch | Cross bar pitch |
Q235 | 25mm*3mm | 5mm | 20mm | 50mm |
25mm*5mm | 22mm | |||
30mm*3mm | ||||
Q345 | 30mm*5mm | 27mm | ||
32mm*3mm | ||||
32mm*5mm | 6mm | 30mm | ||
ASTM A36 | 35mm*5mm | |||
40mm*3mm | 31mm | 100mm | ||
40mm*5mm | ||||
ASTM A1011 | 50mm*5mm | 8mm | 32mm | |
60mm*5mm | ||||
60mm*8mm | 34mm | |||
ss400 | 75mm*5mm | |||
75mm*8mm | 40mm |
Quick Guide to Choosing the Right Flooring
Load 3kPa/Deflection 5mm | Load 4kPa/Deflection 5mm | Load 5kPa/Deflection5mm | |||
Span(mm) | Steel Grating Type | Span(mm) | Steel Grating Type | Span(mm) | Steel Grating Type |
1500 | G255/30/100 | 1400 | G255/30/100 | 1200 | G255/40/100 |
1800 | G325/30/100 | 1710 | G325/30/100 | 1500 | G325/40/100 |
2100 | G405/30/100 | 1780 | G403/30/100 | 1800 | G405/30/100 |
2400 | G505/30/100 | 2030 | G405/30/100 | 2100 | G505/30/100 |
2800 | G655/30/100 | 2350 | G505/30/100 | 2400 | G655/30/100 |
2400 | G655/30/100 | 2800 | G756/30/100 |