FRAME

Rectangular in shape produced by a single cast with a height of mm 110 provides a stable and pose safety in traffic. Outside there are the slots and holes for better anchoring and optimize the cement mortar. When open all the net opening is free.

GRATING

It comes flat and rectangular dimension mm 846×333, with rectangular slots. The structure is very heavy to withstand high loads over the 90 tons, gratings are inserted into the frame in a modular way with bottom deck so as to obtain different lengths. Grating has four slots for the insertion of steel screws M12 for locking the same to the frame.

Manhole covers, gullies and gratings can be divided into the following classes: A15, B125, C250, D400, E600 and F900 Group 6 (Class F900): areas subject to particularly high loads , e.g. airport runways