... high 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 handrail ... kind of steel grating fit for all kind of industrial platforms. Notes: common welding standard: single-side full ...