... safe, 2 easy installation,sturdy and durable, ventilated Steel Grating /Steel grid 1) Light weight, great load-bearing capacity ... 3) steel grating may be applied to platform, floor, walkway, stair treads, trestle, fencing, drainage, trench cover, pit cover, suspended ceiling, ... steel flat grates, 3. serrated steel flat gratingTypeWelded steel grating, pressure-locked, socket-welding Steel flat size20×3, ...