1. Triple anti-noise patent technology.
The first patent : Put a rubber cushion between manhole cover and frame. The second patent : Make the manhole cover and frame more tighter and matched. The third patent : Set a elastic device at the back of manhole cover, in order to avoid manhole cover to deform.
2. Duplicate anti-theft patent technology.
The first patent : The antitheft protection of manhole cover combined with the lock. The second patent : Set a lock on manhole cover, such as general type, professional type, password type, electronic password type.
Bearing Class / Loading Capacity of Cast Iron Manhole Covers
Class
Apply to
Bearing
Remarks
EN124-A15
Areas where only passed by Pedestrians and Bicycles.
15KN
EN124-B125
Footways, parking lot or similar areas.
125KN
HOT-SELLING
EN124-C250
The edge combinative area of vehicle road and the pavement.
250KN
EN124-D400
Vehicle area and urban arterial road.
400KN
HOT-SELLING
EN124-E600
Shipping port and parking apron area.
600KN
EN124-F900
Airplane taxiway and huge dock.
900KN

