1,professional and reputation 2,Years of factory 3,Rich experience 4,plentiful example 5, Professional Service Hebei OUJIA Wire Mesh Manufacture Co.,Ltd Specification of Steel Grating: Platform,trench cover,tair tread ,fence ,pavement gratingType:W--welded steel grating L-- pressure-locked C-- socket-weldingBearing bar centers:15-30, 40, 60, 80, 90 mm etc. with 30, 40 mm recommended.Cross bar ...