40*5mm Heavy Duty Galvanized Steel Grating Supplier in China

There're three kinds of steel gratings, flat bar grating, serrated bar grating and I bar steel grating. They are widely used in steel structure platforms, stair treads, sidewalks, drainages and well covers etc. We are professional factory to design and manufacture standard steel grating and customize according to client's requirements.
Another type: Anti-slip Serrated bar grating:

1) What's Material of flat bar grating? 
Low Carbon Steel or Stainless Steel
2) Surface Treatment of flat bar grating 
Untreated, Hot dip Galvanized, powder coated
3) Specification list of flat bar grating

Loading show of steel bar gratings:

1 Application:
Flooring, catwalk, mezzanines/decking, stair tread, fencing, ramp, dock, trench cover, drainage pit cover, maintenance platform, pedestrian/crowdedpedestrian, factory, workshop, motor rooms, trolley channel, heavy loading area, boiler equipment and heavy equipment area, etc

2 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