On Fri, 26 Mar 2021 15:14:20 +0000 (GMT), charles
wrote:

In article ,
Mathew Newton wrote:
On Friday, 26 March 2021 at 07:20:51 UTC, Mike Halmarack wrote:

Rush hour's a torment when you've got one of these seveal feet away.
I tried several things: pouring sand between the frame and the lid,
which worked for a while, expanding foam with similar effect.
In the end it had to be a replacement.

I've noticed that all the manhole covers on our 'new' (2007) estate are
made up of two triangles, presumably as each piece is unable to rock
regardless how ill fitting they might be/become. That or some health and
safety requirement to minimise weight for lifting them out.

I'd that thought the second reason.

On the way back from our walk earlier we came across a square manhole
cover on the pavement that 'looked' like it was made up of two
triangles so I explained to the Mrs that the idea that therefore it
wouldn't wobble. So I stood on it and of course it rocked backward and
forward like a goodun! ;-(

Looking closer I don't think it was two separate triangles but one
piece with a diagonal line across it. ;-)

snip

Cheer, T i m