Manhole covers, also known as drain covers, are made by spot-welding steel grating panels. They are easy to install, lightweight, have good load-bearing capacity, excellent impact resistance, and bend rather than break. They offer high drainage volume and are aesthetically pleasing and durable after hot-dip galvanizing treatment, providing rust and corrosion resistance that outshines cast iron covers. With hinge connections, they are easy to open and offer theft protection. Applications include municipal roads, gardens, residential areas, schools, sports facilities, and various other locations. Steel grating panels, also known as grating or steel grating, can be custom-manufactured to meet different load-bearing capacities and span requirements.