Inspection manhole cover in ductile iron EN-GJS-500-7 conforming to norm UNI EN 1563:2012
Made of multiple items all worked with mill machine in contact surfaces and lateral support, are assembled together with bolts so as to obtain a single frame according to the required measurements, inside there are the seats for the insertion of steel beams
Made of steel with hot-dip galvanizing.
Are rectangular or square shape, have walls of contact and support machined by milling so as to obtain a contact with the frame without tollerances with a watertight closure. The covers are interchangeable. The metal surface is designed to be not-skid and there are four holes for lifting.
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 6 (Class F900 minimum): areas subject to particularly high loads , e.g air port runways.
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.