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Posted to uk.d-i-y
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BT manhole in road.
"charles" wrote in message
...
In article 2,
DerbyBorn wrote:
newshound wrote in news OOdndQsM7d-
:
On 06/09/2018 12:30, mechanic wrote:
On Wed, 5 Sep 2018 21:53:18 +0100, newshound wrote:
On 05/09/2018 21:08, Mike Halmarack wrote:
Sand does sound easy and more socially acceptable.
Not only that, it seems to have worked wonderfully well.
Thanks for the tip Colin, I would've never thought of that solution.
I have to say, I'm not sure how long it would have taken me to come
up
with it, and I'm supposed to know about such things.
Why are you supposed to know about such things?
Because, over the years, I have done a lot of analysis of friction and
also the effects of debris and wear in what are often complicated
mechanical systems. I am even doing some at the moment.
I suppose casting defects could be an issue.
It makes me wonder how many road repairs are due to poorly built manhole
"shafts" sinking and crumbling. Winter seems to hit them badly. We should
make more use of the pavements.
These defects are usually caused when the road is resurfaced. They are
not
inherent in the original design. The cover is usa=ually bedded in sand to
get the level correct, but rain wshed the sand away and things go wrong.
Pavements aren't usually very wide. Think of trying to get electricity,
gas, telephones, foul drains and storm drains all underneath.
Works fine here, even with the narrowest suburban streets.
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