Welded Grating

1) bearing bar (load bar) specifications (mm):the specification of plain type and serrated type bearing bar is 20 x 3 to 100 x 10;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, 15,25, 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
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/t4001.1-2007b) usa: ansi/naamm (mbg531-88) c) uk: bs4592-1987 d) australia: as1657-1985 e) japan: jjs.