Inspection manhole cover in ductile iron EN-GJS-500-7 conforming to norm UNI EN 1563:2012
It is obtained from a single cast, its stability is guaranteed through a double throat supporting area, creating a metal to metal coupling system, thanks to the interposition of an EPDM gasket, this is studied to obtain a watertight/ waterproof sealing. Inside there is also a special provision to host, if necessary, the glass reinforced plate (GRP).
It is square in shape, it ensures a high stability due to a depth of insertion over 50 mm, the EPDM gasket inserted in the throat, which is located in the supporting area, and the locking system with stainless steel screws. The opening is obtained through the insertion of specific handles in the blind holes of the surface. All the covers are interchangeable. The top surface is antiskid and it allows the complete flow of water.
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 4 (Class D 400 minimum): road carriageways (including pedestrian streets), hard shoulders and parking areas for all types of road vehicles.
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.