Inspection manhole cover in ductile iron EN-GJS-500-7 conforming to norm UNI EN 1563:2012
It is realized in a single cast, it can be opened by triangular section covers with double hinges, with the aim of having free access to two/three sides. Externally, the outside border is flanged in order to optimise its hold in the cement and it has specific holes for the insertion of anchoring bolts.
It comes triangular in shape, it is hinged to the frame with top opening of 110°. At 90° it assumes the automatic safety blocking position and can be removed without disassembling the hinge. This method allows partial and sequential opening with a coupling system placed on the edges, which reduces the infiltration of water.
The master half cover section is provided with a stainless steel lock, operable using a special shaped key which guarantees safety and prevents the opening of the manhole covers by non authorised personnel.
Furthermore the key becomes a comfortable handle for opening and closing the cover. The upper surface is designed to be non-skid to allow the complete flow of water and avoid the creation of ice.
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.