... options such as: flush top, rectangular bar, plank, and I-bar. Aluminum grating is available in the swage locked, pressure ... . Stair tread bar grating is typically offered in a welded construction and is made with a checkered plate nosing that ... Steel GratingPlatform,trench cover,tair tread ,fence ,pavement gratingType:W--welded steel grating L-- pressure-locked C-- socket-weldingBearing bar centers ...