Could be used for grounding vehicles too.
They taught us at a electricity power station that if your vehicle gets electrocuted, like if something on it touches live wires.
To park it up in a safe open space with nothing around it for a couple of days.
The electricity can earth thru the tyres, if there's metal, nails, wire bits etc etc in the tread the power will go thru it.
This bit of power can cause a arc, this can cause a small fire, the compressed air in the tyre can feed this fire with oxygen, it will be a very tiny intense fire and can heat up the inside of the tyre.
This will increase the pressure inside it until the tyre explodes, or catches fire.
Just a random caution but mostly a source of a interesting random unknown safety fact that may never happen, to impress somebody else with one day.
I read a story about the making of 'The Boston bridge' using caissons.
Here's a bit about it.
Men Labored in Caissons Under the Brooklyn Bridge
They had the same problem when a spark from a lamp got into the timber roof, as the air was under pressure, it fed the spark, tunnelling thru the wooden beams until they got a (must have been tiny) guy to excavate it out using a hammer and chisle, it tunnelled over 10 feet into a solid wood ceiling/floor burning out individual wooden beams.
If you can find the whole story about building the bridge, read it, its one of the most fascinating construction story's I have read. Similar to 'The red rocks of Eddystone lighthouse".
https://en.m.wikipedia.org/wiki/Eddystone_Lighthouse
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