... clean and installation, durable etc.Application:sidewalk, pavement, floor, structure paltformType:W--welded steel grating L-- pressure-locked C-- socket-weldingBearing ... .Bearing bar centers at 30mm: This kind of steel grating is the most commonly used in projects with American, ... please contact us. outdoor floor steel grating_ditch covers,HDG steel grating,drainage cover,sidewalk grating,well cover ...