Square ductile cast iron manhole cover

Square ductile cast iron manhole cover, in line with the EN124 grade standard, according to the ductile cast iron manhole cover above the word "D400", we can know that the load is 400 kN, equivalent to 40 tons. This ductile cast iron manhole cover, well cover and well holder integrated design, easy to install, and can effectively prevent theft. This ductile cast iron manhole cover is 450mm*750mm in size, but our company can customize different sizes and patterns.