... technology rich experience quick shipment well cover grating(trench cover grating,drain cover grating) Packaging Detail:seaworthy,by pallet ... walkway, platform and steel structures, stair tread, well cover, trench cover, compound gratings, storage shelves, ladder, fences and ... most commonly used for Belt corridor, storage shelf,Attic panel, trestle, guardrail, sunshade gate, etc. Standard: British ...