steel grating 1>plain style,serrated style, and I bar type, etc 2>bearing bar size:20*3--100*10 3>bar pitch: various kinds We specialize in manufacturing and exporting many kinds of steel gratings with the best quality, competitive price and faster delivery time. Such as steel mill black and hot dip Galvanizind steel grating,flooring walkway,platform,stair tread,well cover,trench cover,checkered ...