A15 level Bearing about 1.5 tons and is used in areas where motor vehicles or non-motor vehicles are completely prohibited
B125 level Bearing about 12 tons, used for sidewalks, pedestrian areas, non-motorized lanes, small car parking lots and other areas
C250 level Bearing about 25 tons and is used in residential areas, inner streets and other areas where only a small number of light motor vehicles or cars drive
D400 level Bearing about 40 tons, it is used for urban motor vehicle roads, roads, high-grade highways, expressways and large vehicle parking lots for various types of vehicles
E600 level Bearing about 60 tons, used for freight station, logistics area, wharf, airport and other areas
1.Light weight, single unarmed can be open, convenient down hole maintenance!
2.Sewer internal environment complex filled with various chemical substances, ductile iron does not suffer chemical corrosion, service life more than 30 years
3. Cover and base frame integrate connection, hinge-type opening, sledgehammer hit not break it, completely anti-theft.
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