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 846x333, 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.
NORM EN 124 CLASSIFICATION AND LOCATION
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 
Hebei Mingda International Trading Company is specialized in castings,forgings and machinery parts.
Our products include all kinds of raw castings to be made of ductile iron , grey iron , brass , stainlesssteel and aluminums,
machined castings and forged parts . To make these parts according to thecustomers' drawings ,we have relative suitable production craft and equipments, such as resin sand ,sand mould , hot core boxes , lost-wax , lost foam and so on .
Specially for hydrant bodies and valves' bodies, we have collected rich experience for these products inthe past 16 year's actual production,
Now we are proud of our products with good surface and highquality material. Whatever,we have been trying our best to provide our customers with better qualitycastings by improving production crafts and more careful quality control.
