... capacity.TypeW-- welded steel grating L-- pressure-locked C-- socket-weldingBearing bar centers15-30, 40, 60, 80, 90 mm ... stair treads and British, German,French and Japanese standards are available. The products most commonly used for Belt corridor, storage ... standard: single-side full welding every 3 bearing bars. Socket-welding steel grating,hand welding steel grating,steel construction platform