Ductile iron manhole cover

Ductile iron manhole cover advantages

Anti-noise, anti-slip, anti-displacement, anti-fall, anti-theft,

The minimum bearing grade is different for different places

Class A: minimum test load 15KN, for pedestrians and cyclists only

Class B: minimum test load 125KN, sidewalk, sidewalk area and similar lot, parking lot or parking deck

Class C: minimum test load: 250KN, installed in roadside gully

Class D: minimum test load 400KN, roadway (including pedestrian street), hardfaced platforms and parking lots, all types of motor vehicle lanes

Class E: minimum test load of 600KN, set for large tire load path, such as dock, airport runway, etc

Class F: minimum test load 900KN, set for super large tire load lane, such as airport runway, etc