Rick says "I have
problems with this story. First, every rod (the proper name for the stick)
I have seen is made of wood to reduce thermal expansion. Aluminium expands
like crazy with heat and could throw readings off.Second, there may be
longer ones available, but I have never seen a rod longer than 12
feet. Power lines are much higher than 12 feet. This story sounds like one
of those that was told over lunch on the job to see if you could impress
the FNG."
Paul says " There is
another problem with this story. Induction, getting current with no actual
circuit, only occurs if the objects are oriented parallel to each other. A
rod would have been held perpendicular and no current would have been
passed."
Tim Larson says, "I worked with the survey crew of a highway
department for several years. This clarification is for your readers'
information. 'Range poles' or 'pickets' are used for determining or
setting a straight line. They may have a metal core (I'm not sure), but
I've never seen one more than 12' high (three 4' sections screwed
together). 'Rods' are used for determining elevation, and are made of
something that doesn't expand. New ones are telescoping fiberglass tubes up
to 25' tall, older ones are wood and snap together with metal clasps."
-June 2003
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