... gratingType:W--welded steel grating L-- pressure-locked C-- socket-weldingBearing bar centers:15-30, 40, 60, 80, 90 ... trestle, guardrail, sunshade gate, etc. Notes: common welding standard: single-side full welding every 4 bearing bars. Bearing bar centers at ... shape, colour and cost . High intensile strength : firmmesh pressing welding structure make it high load bearing;Light structure : easy to ...