Inspection manhole cover in ductile iron EN-GJS-500-7 conforming to norm UNI EN 1563:2012
It is realized from a single cast, without gasket, its stability is guaranteed through a metal to metal coupling system. The outside edge is realized with the shape of a channel in order to obtain a system of hydraulic closure if it comes filled up with sand, tar or other materials. Externally, the outside border is flanged to optimise its hold in the cement and the insertion of anchoring bolts.
It is square shaped and it ensures stability thanks to a fixing system through an elastic bar. On its surface there are two blind holes useful to insert lifting handles and to facilitate the opening (provided on demand). All the covers are interchangeable.Their surface is antiskid and it is specifically shaped to ensure the complete outflow of the water avoiding the ice formation.
STANDARD EN 124 CLASSIFICATIONS AND PLACES OF EMPLOYMENT
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.