... , easy to instal galvanized steel grating steel gratinggalvanized steel grating 1.materials:mild steel2. Standard: (1). bearing bar pitches may be 12.5 ... 90mm, of which 30 and 40mm are recommended. (2).Cross bar pitch may be 30, 38, 50, 76 and 100mm, of ... also make the products on your requirement3. Advantages of steel grating: light weight, strong intensity, big load capacity, transmission and ...