Material:Mild steel ,carbon steel. Size:Standard or OEM. 30/100,34/38,38/76,,, ISO 9001:2000 grating Fast delivery,7-30 days Welded steel grating: 1.) Processing technic: steel grating is made by bearing bar and cross bar according to the flat-steel weft arrangement, in high-pressure spacing on resistance welder welded by cutting, incision, opening, overlock process such as processing and into ...