We drive over them every day. We all see them in our streets.
Were other shapes ever considered? Has anyone ever seen one that is not round?
2007-01-10 23:53:39 · 16 answers · asked by Titus 5 in Science & Mathematics ➔ Engineering
If they were any other shape, they would fall through the hole. They are a constant diameter, unlike a square, trapezoid or rectangle. Plus, they support weight consistently throughout the circle and are easier to manufacture.But what do I know, I'm a pilot not an engineer
2007-01-10 23:57:51 · answer #1 · answered by Anonymous · 0⤊ 0⤋
They are round for a very good reason, so they won't ever fall in the hole. Any other shape could be turned wrong and dropped down inside the hole which would kill anyone standing underneath it. Yes other shapes were considered and used but after dropping a few down, the round ones were excepted as standard.
2007-01-11 07:58:03 · answer #2 · answered by RayCATNG 4 · 0⤊ 0⤋
City Workers are usually more of a round shape than a square one, so it's kind of easier for them to get down there and complain about the smell.
2007-01-11 08:03:16 · answer #3 · answered by Eschaton 3 · 0⤊ 0⤋
I would think it's because people like rounded corners and a round hole gives more space than a square one.
2007-01-11 07:58:47 · answer #4 · answered by Tapestry6 7 · 0⤊ 0⤋
I've seen square/rectangluar and trianglar ones as well as round ones here in the UK. Don't know why they're different shapes, maybe different services.
2007-01-11 07:58:53 · answer #5 · answered by simbar 1 · 0⤊ 0⤋
Just simple answer...If it's some other shape, the cap can easily go inside when it is placed diagonally. Round cap can't go even if placed diagnally or anyother position.
2007-01-11 08:13:28 · answer #6 · answered by praneshkanna81 1 · 0⤊ 0⤋
Any other shape could fall in. Round lids will not.
2007-01-11 08:01:06 · answer #7 · answered by doggiebike 5 · 0⤊ 0⤋
It has to do with the building by-law
All access opening needs to be minimum 600 mm by -law
A small opening is best to be round to achieved that requirement
2007-01-11 08:16:22 · answer #8 · answered by kimht 6 · 0⤊ 0⤋
nope just round ones. maybe they are eaier for people to get in and out of. plus if its round there are no edges sticking up like with a square or triangle.
2007-01-11 08:03:41 · answer #9 · answered by Anonymous · 0⤊ 0⤋
Makes them easy to roll into place, and difficult to fall into the hole
2007-01-11 07:57:24 · answer #10 · answered by Anonymous · 0⤊ 0⤋