why are drainage covers mostly circular ?

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why are drainage covers mostly circular ?

2007-08-09 14:42:10 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology

3 answers

Cylindrical pipes are the easiest to manufacture, and a circular drainage cover is the best (only) shape that caps off the end of a circular tube.

2007-08-09 14:46:59 · answer #1 · answered by lithiumdeuteride 7 · 0⤊ 0⤋

Actually, it is because circular lids cannot fall into the hole no matter how they are turned. Square ones, if put in along a diagonal, can be made to fall into the hole, meaning an expensive trip out for the utilities company.

2007-08-09 21:52:02 · answer #2 · answered by jeebus1486 2 · 4⤊ 0⤋

it is a manufacturer's decision. The ones in front of my house are square.

2007-08-09 21:45:30 · answer #3 · answered by Anonymous · 0⤊ 0⤋