... public squares, gardens, wharf, airport, parking, highway, railway, industrial engineering and so on.Type of bearing barW--welded steel grating L-- pressure ... This kind of steel grating fit for all kind of industrial platforms.Notes: common welding standard: single-side full welding ... . 3. In the case of stair treads, please specify its type, length, width, quantity and surface treatment. 4. If any ...