wrote in message
...
wrote:

In other words, do it right, weld it all together and there is no problem.

OH NO! don't say that! but i guess its too late, the weld vs tie argument
is probably already off and running.

Dave wrote:

wrote in message
...
wrote:

In other words, do it right, weld it all together and there is no problem.

OH NO! don't say that! but i guess its too late, the weld vs tie argument
is probably already off and running.

If you search through the archives, you will find the references from
reputable sources (i.e. manufacturers and engineers that do it for a living
as opposed to Joe from Peach Pit GA) that say the weld prevents (relative)
high resistance hot spots from occurring.

--
Jim Pennino

Remove -spam-sux to reply.

wrote in message
...
Dave wrote:

wrote in message
...
wrote:

In other words, do it right, weld it all together and there is no
problem.

OH NO! don't say that! but i guess its too late, the weld vs tie
argument
is probably already off and running.

If you search through the archives, you will find the references from
reputable sources (i.e. manufacturers and engineers that do it for a
living
as opposed to Joe from Peach Pit GA) that say the weld prevents (relative)
high resistance hot spots from occurring.

and if you search through other archives you will find that only in special
cases, and with very specific requirements, is welding of rebar done. the
standard method is wire ties and is quite adequate for tower bases.

Dave wrote:
"The standard method is wire ties and is quite adequate for tower
bases."

I lost count decades ago on the towers I`ve installed. The peril is
high-density current directly through concrete which always contains
moisture which has not yet reacted with the cement. This is still true
after a thousand years, but the concrete is still strengthening as the
reaction continues.

Solution to the lightning vulnerability is to bypass the tower base with
multiple high-conductivity paths. It`s customary to attach a heavy
copper cable to each tower leg and route these cables outside the tower
base to their individual ground rods. You don`t do this on a medium wave
broadcast tower as 120 radials are ground enough for the tower which
rests on insulators.

Best regards, Richard Harrison, KB5WZI

wrote:
Dave wrote:

wrote in message
...
wrote:

In other words, do it right, weld it all together and there is no problem.

OH NO! don't say that! but i guess its too late, the weld vs tie argument
is probably already off and running.

If you search through the archives, you will find the references from
reputable sources (i.e. manufacturers and engineers that do it for a living
as opposed to Joe from Peach Pit GA) that say the weld prevents (relative)
high resistance hot spots from occurring.


We have a 100' free standing tower. The J-bolts are welded to the
rebar and the tower is also grounded with an additional ground
system. The tower takes a LOT of direct hits. Up to now we had
neither problem with the concrete base nor with the equipment.
All antennas are grounded too, of course.
Does this count as anecdotal evidence?

Kind regards, Eike from the land of lightning