Steel Bar Grating
Specifications Steel Bar Grating:
1.Easy installation
2.Strong structure
3.Aesthetic appearance
4.Good water permeabilityWe also provide stair ladder, compound steel grating, drainage pit/trench cover, and railing & stanchion. Special specifications can be produced by customer’s requirements.Specifications of Steel Bar Grating
1)The shape of bearing bar: Plain type (may be omitted in the symbol of steel grating), Serrated type and I-Shape type
2)Bearing bar pitches can be 12.5, 15, 20, 30, 30.16, 32.5, 34.3, 40, 60mm, of which 30mm & 40mmare recommended.
3)Cross bar pitches can be 38, 50, 60,100mm, of which 50mm & 100mm are recommended.
4)Surface treatment: Hot-dip galvanizing, paint or other anti-corrosive coatings are available, of which hot-dip galvanizing is generally recommended.
5)Material: Q235 in line with GB/T700 steel
6)Application: flooring, catwalk, mezzanines/decking, stair tread, fencing, ramp, dock, trench cover, drainage pit cover, maintenance platform, pedestrian/crowded pedestrian, factory, workshop, motor rooms, trolley channel, heavy loading area, boiler equipment and heavy equipment area, etc
7)Tolerance
The allowed deviation of length is +0/-5mm, while the allowed deviation of width is +/-5 mm.
The non-perpendicularity of bearing bar is allowed no more than 10% of width of bearing bar.
Cross bar surface should not surpass bearing bar surface 1mm, beginning & end of cross bar should not surpass the end surfaces of two sides of grating 2mm.
8)Standards:Steel grating standard Steel standard Galvanizing standard
China standard YB/T 4001.1-2007 GB700-88 GB/T13912-2002
USA standard ANSI/NAAMM(MBG531) ASTM(A36) ASTM(A123)
U.K. standard BS4592 BS4360(43A) BS729
Australia standard AS1657 AS3679 AS1650Manufacturing process of steel grating
Material-welding-cutting-end plate welding-surface treatment-final shipment
Installation of steel grating
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4.Good water permeability
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