... of high quality steel grating for construction projects with a competitive price, 90% of our products ... thickness)(mm)No. 130mm100mm20×3, 25×3, 32×3, 40×3, 20×5, 25×5, 32×5, 40×5, ... the most common type, and it accords with US standard.this type has the highest compressive strength. Widely ... most economic and lightest weight, and it accords with British Standard. Specially in small span places, such as ...