We design and manufacture many kinds of steel gratings, including: plain style steel grating, serrated style steel grating, bar grating and other gratings. Application: platform, floor, walkway, fence, they widely used in steel structure platforms, stair treads, sidewalks, drainages and well covers etc. We also supply standard steel grating and non-standard grating as customersí» demands. Package: pallets in containers Bearing bar specifications(mm): the specification of plain type and serrated type bearing is 60íß5, 55íß5, 50íß5, 45íß5, 40íß3, 35íß5, 35íß3, 32íß3, 25íß3, 20íß5, 25íß5, 20íß3, 75íß7, 65íß7, 60íß7, 55íß7, 50íß7, 50íß5, 44íß5, 38íß5, 32íß5, 22íß5, 20íß2, 25íß2, 50íß3, 30íß4, 40íß4, 60íß4, 70íß4. The specification of i-section type is 75íß7íß4, 65íß7íß4, 60íß7íß4, 55íß7íß4, 50íß7íß4, 50íß5íß3, 44íß5íß3, 38íß5íß3, 32íß5íß3, 25íß5íß3.Etc. 2)bearing bar pitch: 15, 22, 25, 30, 32.5, 34, 40, 50, 60, 80, 90mm.Etc. 3)cross bar pitch: 24-200mm, 50, 70, 100mm are recommended. 4) material: mild steel (low carbon steel astm (a36) or q235), stainless steel 304 or 316. 5)surface treatment: untreated, painting , hot dip galvanized or lacquering. 6)quality standard: Steel grating standards: china: yb/4001-1998, u.S.A:ansi/nanmm (mbg531-88), u.K: bs4592-1987. Steel product standard: china: gb700-88, u.S.A: astm(a36), u.K:bs4360(43a). Hot galvanized standard: china: gb/t13912, u.S.A:astm(a123), u.K:bs729