Rectangular Inspection manhole cover in spheroidal cast iron EN-GJS-500-7 conforming to norm UNI EN 1563:2012.
Individual elements are soldered together according to norm ISO 4063. It doesn’t have gaskets and its stability is guaranteed through metal on metal contact. The outside edge is realized in the shape of a channel in order to obtain a system of hydraulic closure if it becomes filled up with sand, tar or other materials. Externally the structure is high to optimise its hold in the cement and the insertion of the anchoring bolts.
It is square in shape, it guarantees a good stability thanks to the height of the border and insertion depth not less than 50 mm, it comes with 2 dead holes, which allows the insertion of a suitable handle to lift the cover (supplied on request). All the covers are interchangeable. The upper surface is designed to be non-skid to allow the complete flow of water and avoid the creation of ice.
Manhole covers, gullies and gratings can be distinguished into the following classes: A15, B125, C250, D400, E600 ed F900.
Group 3 (Class C 250 minimum): For gullies installed in kerbside channels of the pavement which , extends to 0.5 m in the road and to 0.2 m top on the pavement, when measured from the edge.
THE APPROPRIATE LOADING CLASS CHOICE IS UP TO THE WORKS DIRECTOR. IN CASE OK DOUBT (SUCH AS PARTICULARLY INTENSE TRAFFIC OR VERY HIGH LOADS AREA), IT WOULD BE APPROPRIATE TO CHOOSE A SUPERIOR LOADING CLASS.