Galvanised Steel Manhole Cover and Polypropylene Frame 25 Tonne LoadingWill support a slow-moving wheel load of 6.25Tonnes, pedestrian precincts, commercial delivery areas and emergency services.620mm x 470mm (Actual Cover Size)600mm x 450mm x 23mm (24 x 18) Clear Opening Size663mm x 513mm Overall Size including Frame.The technical specification sheet for this product can be downloaded by clicking here.Our pressed steel manhole covers are manufactured in the UK by Clark-Drain under the quality management system ISO 9001:2015.All of our steel covers are galvanised to ensure that they are long-lasting and resistant to corrosion.What does galvanised mean?The galvanising process is carried out to BS 1461. Galvanising essentially involves applying a coating of zinc to the steel by dipping it into a zinc bath. At this time the iron within the steel reacts with the molten zinc to form a uniform coating that protects the steel by creating a barrier that keeps any corrosive particles in the atmosphere away from the base steel substrate.The frames for our steel covers are made from strong polypropylene.
