Polyethylene grating Queen

high load capacitymanhole coverconstruction

It is square or circular in shape with an internal circular net opening. It has a polyethylene gasket placed inside, in order to increase stability and eliminate any rocking or noise. The locking system is automatic, obtained through an elastic bar. The unlocking process can be performed with suitable tools from the construction site. The external edge is flanged to optimise its hold in the cementand the insertion of the anchoring bolts. It is circular in shape, it is hinged to the frame with top opening of 110°, 90° is the safety position (automatic locking) with the possibility of removing it without disassembling the hinge. It guarantees a high stability thanks to self-centering guides placed under the cover with double stops. The upper surface is designed to be non-skid. 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. Group 4 (Class D400 minimum) road carriageways (including pedestrian streets), hard shoulders and parking areas for all types of road vehicles.