At 22:15 11/11/99 , K5PC wrote:
>There is no necessity to put any additional hardware on the tower other
>than the bolts and nuts that come with the tower from Rohn. The fine
>threads were chosen to prevent the nuts from coming loose.
>I am still cringing at the discriptions of those guys "showering down" on
>the bolts with the wrenches. You just put enough torque on the bolts to
>securely tighten the nut into the tower leg. no more torque than a normal
>man can exert with two small open-end wrenches.
>The majority of the weight of the tower is supported by the bottom of
>each section resting on the top of the section below it. The bolts are
>to hold each leg firmly in place, and to keep the legs from twisting left
>and right. By immobilizing each joint, each leg handles 1/3 of the load.
>You can spot over-torqued sections very easily. If the leg is no longer
>perfectly round, too much elbow grease was used when it was installed.
If you keep packing away on the tower bolts until the tubes have
distorted, you have probably exceeded the allowable percentage of yield
values on the bolts;
and to what purpose ??
For a tower job, I would imagine that the tightening value necessary
should only be enough to keep the nut on the bolt, and for a fine
thread such as Rohn uses, that ain't gonna have to be very much.
Although this is certainly not to be taken seriously, I might suggest
that even the use of a cotter pin arrangement could possibly suffice
for most towers.
As to the use of flat washers or spring washers, I surely agree that
they are not necessary, but their use shouldn't be detrimental, just as
long as there remains enough bolt length available to allow for a full
thread count of contact in the nut.
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