... ,trench cover,tair tread ,fence ,pavement gratingType:W--welded steel grating L-- pressure-locked C-- socket-weldingBearing bar centers: ... at 30mm: This kind of steel grating is the most commonly used in projects with American, Australian, Japan standards are ... link fences, expanded metal meshes, welded wire meshes, stainless steel wire meshes, hexagonal wire meshes, screens, barbed wire meshes, ...