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1.)Ordinary type steel grating inculding 3 kinds.
a.One type :bearing bar centers is 30mm ,this type is the most commonly used.
b. Second type:bearing bar centers is 40mm, this type is the most economically deft type,mostly used for platform,walking platform and steel ladder.
c. Third type:bearing bar centers is 60mm, This type is usually used for mining industry.
2.)Material: Carbon steel, Stainless steel ,brass and so on .
3.)Surface treatment:hot-dipped-galvanized ,electro galvanized or PVC coated ....
4.)Size:standard or OEM(Making as the customers' request).
5.)Packing:Naked or packing as the customers' request.
ST4 grating stair tread