I suspect that water in a towers legs is not due to rain (in most cases) but
due to condensation? Moist or humid air can leak through gaps that water
alone could not get through. So you have moist air inside the tubes. When
the temperature changes the water condenses out and runs down the inside of
The, now, drier air inside has less volume than before and there will be a
tendancy to suck in more outside air which if more humid will continue the
process. When the water collects in the bottom of the tubes, probably below
ground level, it will be in a cooler more stable place and will not
evaporate much. Therefore will increase in quantity.
We have seen threads on these lines before associated with water in traps
and antenna elements.
This doesn't help the problem and suggestions have recently been made on the
list on how to combat the situation so I will not repeat them.
This is my thinking on the subject and not being a physics buff will accept
corrections if my conjecture is flawed in any way.
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