Greetings all:
Actually, I have a whole bunch of questions related to the Create tower
installation I am doing on the 2nd. story of my house. This particular
tower is almost 15 feet tall with a base section one meter on a side. The
tower necks down to about 7 inches square at the top. I have no problems
getting the thing mounted securely on my roof, but I am worried about a
couple of things:
1.I plan to put up my KLM KT34-XA. I'm buying a 15 foot mast , 0.12
" wall and 87000 psi., from Texas Towers. Now the rotator mounting plate
is at the 10 foot level of the tower, so I will have 9 feet sticking out
of the top of the tower. I plan to put the KT34 5 feet above the tower
(and thrust bearing) and the boom support bracket will be about 3 feet
above that. So, question 1, am I being a little bit over optimistsic
putting the beam that far above the tower? I really don't want to put it
just a foot above the tower,. I do plan to put a piece of reinforcing
metal on the very top of the tower for structural support. I alsio plan to
put some bracing between the sides of the the tower at 2 different levels
also.
2.Since the KT34 has a 30 foot boom, I want to provide some torque bars to
help things along. The tower is square and will be guyed 5 feet up and 15
feet upl The guys will obviously be at 45 degrees to the sides of the
tower. I had thought about putting steel angle iron along each edge of
the tower and about 18 inches out and then guying to that. See
below...hope it comes out ok.
o
X
X
X
X
X
X
X XXXXXXXXXXXXXXXXXXXXXXXXo
X | |X
X | |X (note: tower not drawn
square)
X |__________|X
o XXXXXXXXXXX XXXXXXXXXXX X
X = steel angle iron
X
X o = guy point on angle iron
X
X
X
o
Another idea is to put a plate on top of the tower, bend the corners down
about 60 degrees and secure a strong hasp to the corners and the other end
of the hasp to an aluminum bar about 18 inches long and guy to that. (this
seems to be a better idea in my mind). Any other ideas or comments??
I'll be using Phillystran at 1200 lbs strength.
I'm putting 8 inch feet on each leg, each made out of 2 inch angle aluminum
a quarter inch thick. The legs will be anchored through the roof with two
lengths of 1/2 inch threaded rod to a 2 by 6 attached to the roof joists.
The guying points will be half inch threaded rod with a welded 1 inch eye
also going through the roof into a 2 by 6 nailed between the roof joists
(which are on 2 foot centers). The roof is only one half inch chip board
and seems to be the weakest link here.
I realize the KT34 is a pretty big antenna but it has been a super
performer for me and I sure hate to downsize! On the other hand, with the
expertise on this reflector, I am sure I'll find out if I am being too
aggressive.
Thanks and 73,
Bill WX8S
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