1. Material Quality Look for racks made from durable materials such as stainless steel or galvanized steel, which resist rust and corrosion. The longevity of the rack is crucial in ensuring that it withstands wear and tear over time.

For the manhole cover to be removed from the mold, an hour and half is usually sufficient but complete cooling takes about 24 hours. Once the casting is completely cooled, it is placed on a grate and vibrated until all the sand has been removed. The used sand is sorted through a cyclone to remove unusable fine sand, and to sift out the slag if any is present.

What is the difference between manhole covers and access covers?

Group 2 (minimum class B125, ultimate tensile strength > 125kn - 12,5 t.) For areas accessible only by very light vehicles, pedestrian areas, pavements, car parks, and multi-story car parks.