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Round ones are easier to screw on ;-) Short answer: They're not. At least, they're not round everywhere in the world. There are plenty of square and square-l
by hopeless 19y ago
Round ones are easier to screw on ;-)
Short answer: They're not. At least, they're not round everywhere in the world. There are plenty of square and square-like covers in the UK/Ireland, some of which split in half diagonally. Perhaps a better question is why should they be round or what advantages do round covers have?
- Xichekolas 19y agoIf they weren't round, superheros couldn't use them as frisbees/weapons. If a car hits them and they bounce and spin, they will still (most likely) settle back into the hole correctly. Even a Reuleaux polygon won't always do that. There are no points more highly stressed than others. Put an extreme amount of weight on them and the force is evenly distributed around the circumference, rather than overly stressing the corners and bending the cover (on a square lid).