3 ms·
I think I recall reading that manholes are round for the same reason. More resistant to erosion of the ground or something than square shaped holes.
by dudul 8y ago
I think I recall reading that manholes are round for the same reason. More resistant to erosion of the ground or something than square shaped holes.
- petee 8y agoI believe they are also round so they can't fall into the hole if jostled loose - a square can just fall through on an angle.