... TO I BAR STEEL GRATINGS:As to I-type steel grating, bearing bar is in the form ... with the feature of material-saving.I Bar Type Steel Grating is used where high strength and ... platforms, walkway, and stair treads and British, German,French and Japanese standards are available. The products most ... In the case of stair treads, please specify its type, length, width, quantity and surface treatment. 4. If ...