... factory 3,Rich experience 4,plentiful example 5, Professional Service heavy duty steel grid /open cell grid ceiling/ solar grid/paver grid ... ,pavement gratingType:W--welded steel grating L-- pressure-locked C-- socket-weldingBearing bar centers:15-30, 40, 60, 80, 90 mm ... are available. This kind of gratings are featured well by heavy duty, well resistance of strong impact on surface. Gratings with cross ...