How to distinguish heavy manhole cover from light manhole cover?

1, different uses: special roads and venues such as heavy airports or expressway are used for helicopters to take off and land. Urban roads, expressway and parking lots where heavy vehicles run and park. Ordinary slow lanes, passages and service roads in residential quarters.

2. Parking is different: shallow green belts and lanes, roads and venues where motor vehicles cannot exercise and park. Aggravate? ≥360? 1/500xd. Weight? ≥240? 1/500xd .

3. Lightweight refers to the main vehicle that is allowed to bear the pressure of 2 10kN or steam-10. This inspection report should have data. This distinguishes the light and heavy types, not the diameter.

Extended data:

Installation and construction problems:

1, the structural design scale of manhole cover and shaft lining is low, and its structural layer has no reinforcement design.

2. It is unreasonable to plan and arrange the pipeline project within the roadway of on-the-way motor vehicles.

3. A large number of heavy-duty overloaded vehicles in urban traffic are damaged due to insufficient bearing capacity of manhole covers.

4. The bearing capacity of shaft wall is small, which exceeds the bearing capacity of manhole cover and vehicle load, resulting in settlement.

5. The irregular construction of well ring reinforcement leads to uneven manhole cover and road surface, broken frame and even damaged manhole cover.

6, manhole cover installation is not standardized, not installed according to the specified requirements.