I would go out to the same guy point with all guy levels. Its neater and
less work. I'd go out 85% of the highest guy (39 feet x .85 = 33 feet) and
attach all guy levels to your guy anchors located 33 feet away from the
mast.
Then, to determine guy rope length the formula will be the height of the guy
point squared plus the distance away from the mast squared = the length of
the guy rope for that level, squared. So if your first guy level is at 10
feet and the distance from the mast where your guy anchor is located is 33
feet away then:
A2 + B2 = C2 (where the 2 means squared)
(10x10) + (33x33) = C2
100 + 1089 = C2
1189 = C2
34.48 = C
So the first level of guys should be cut 34.5 feet plus an amount for
attaching the rope to the mast and guy anchor.
Just my $0.02 worth.
Jim
KBØX
Original Message
From: towertalkbounces@contesting.com
[mailto:towertalkbounces@contesting.com] On Behalf Of Bill MacLane
Sent: Tuesday, April 01, 2008 8:25 PM
To: Alain Michel; towertalk@contesting.com
Subject: Re: [TowerTalk] Guy Wire Formula?
Alain,
I forgot to mention that you could guy 30 ft. out from the base if you want.
Also, if you buy dacron rope in 500 ft. spools one spool will make a
complete set of guys for one mast. You still need a halyard.
Finally, to figure the guy length it isthe square root of the height of the
anchor squared plus the distance from the base to the anchor squared. I
think that is what you intended to write. However I don't know how to make
the formula in email.
73,
Bill
AI4WM
Alain Michel <opalockamishabob@yahoo.com> wrote: Hello All!
I am in the process of erecting a 40'+ mast to support the feedpoint of my
G5RV. I was initially planning 3 wires [Dacron rope] at each level. Should I
use 4?
Using A2+B2=C2, how far out from the bottom of the mast should the guys be
fastened to the ground? I plan on guying the mast at the 20', 30' and 39'
levels.
All suggestions will be most gratefully received!
73,
Alan...KI6HPO

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73,
Bill
AI4WM

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