Benching in a manhole is the
- Amanhole cover above ground level
- Bmanhole cover below ground level
- Coffset between the working chamber and access shaft
- Dbottom portion of the manholeCorrect
Solution
Concept
Benching
Step-by-step solution
1. Benching is the sloped shelf formed at the bottom of the manhole on either side of the channel.
Explanation
It guides the flow and gives a footing for workers.
Shortcut
Benching = manhole bottom.
Correct answer: D) bottom portion of the manhole