Why do you think manholes are round in shape?

(You need to think a little crooked for this )

Distribution of weight. If a heavy load of weight is put on the center of a circle the weight would affect all of the circle proportional to the point fromt the center. In a square, the points between the corners would recieve the most pressure while the corners wouldn't recieve as much. This uneven distribution would cause bending and warping (over time) and thus have to be replaced costing taxpayer dollars.

Posted by Alan on 2003-02-21 10:17:32