In a message dated 2/13/03 8:01:44 PM Pacific Standard Time, kb9mci@qsl.net
writes:
> Just have a quick question about the specs on the SSV towers. One windload
> is
> listed for at the top of the tower and another is listed for 30 feet
below.
> Can I load the tower at the top and the 30 foot level, or do I just pick
one.
>
Jeez, I'm not an engineer but it appears to be that that's what it means
- you have a top capacity and another for 30 feet down. You cannot add them
together. If in doubt, run your proposed configuration by an engineer.
>
> I may opt to go with a 55g if I have enough room for guy wires, so just
> trying to get all the facts straight now.
In the case of a guyed tower, the tower loading spec is for the WHOLE
tower so you can populate the tower whereever you want. Rohn specs have
already deducted 8 sq.ft. for antenna mounts so you can add that back into
the capacity on the chart.
The same height with a guyed tower will be cheaper. The guys don't have
to be out 80% of the height (that's just the distance Rohn chose for the
catalog specs) so you can put them closer to the tower - just make sure you
have an engineer run the calcs to insure a safe and reliable installation.
Cheers,
Steve K7LXC
TOWER TECH -
Professional tower services for commercial and amateur
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