Actually 80 feet of Rohn 55 without an antenna is fine without guying on a
calm day, provided there is a base built to Rohn specs. I've picked 80
and 90 footers, set them on tower sections with no problems. Although I have
seen guys climb them at these heights, I would give in to the pucker
factor and not do it.
If both sets are dropped at the same time it is MUCH easier than doing one
set at a time. Dropping both sets, hauling the antenna up past the top
guy point and reguying is a one man job and takes no more than two hours
including the rigging. I plan on getting an M2 4 4 el 40 up next week by
myself doing it this way.
YMMV.
Bill K4XS/KH7XS
In a message dated 11/14/2011 4:02:21 P.M. Greenwich Standard Time,
nn5k.mail@gmail.com writes:
I have 90 feet of Rohn 55 with two sets of philly guys.
I have winched up a very large antenna using a ginpole and a nice capstan
winch set back from the tower. On a CALM DAY the RH55 is fine having one
set of guys removed at a time. What I do is winch the antenna up to
just
below the first set of guys and then disconnect them from the guy points on
the ground and simply pass them under the beam. Then winch the beam up
just above the guy point and reattach and tension the guys. Continue on
up the tower for each set of guys. If you have any fears about this
just attach another set of guys just below the ones you want to loosen
Once the beam is above the temp guys tension them and then loosen the
permanent set..... Winch the beam above the perm guy set and re-tension
them. You can work your way up the tower easily that way. The guys
are all disconnected from the point on the ground so nobody is on the tower
when the guys are loosened and removed.
There are problems with tramming as you should have a back guy so that the
high horizontal forces you add to the tower are balanced. That takes some
work also. A heavy tram set up can have some pretty large forces on it
and that must be set up safely.
With the horizontal lift method the forces are not put perpendicular to the
tower so it is a pretty safe way to go.
On Fri, Nov 11, 2011 at 8:50 PM, Larry <lknain@nc.rr.com> wrote:
> I was looking for a detailed description of dropping guys on a guyed
tower
> to raise an antenna but didn't see anything in my searches that looked
> like such a description. I think I know how it is done but I would prefer
> to
> see a desciption. Anyone have a pointer to such a description?
>
> 73, Larry W6NWS
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