Chuck,
I think I get it!
I will try it with pieces of paper and let you know if I run into problems.
What is really cool about this approach is the lack of guys and brackets above
the first section. Nice and neat!
73,
Gordon Beattie, W2TTT
201.314.6964
Sent from Samsung tablet
-------- Original message --------
From: Chuck Smallhouse <w7cs@theriver.com>
Date: 2014/05/21 18:33 (GMT-05:00)
To: TowerTalk@contesting.com
Subject: [TowerTalk] Mast/tower design close in guyed by shrouds and spreaders?
Gordon, I'm sorry but I don't do photos, as I'm inept in computer skills, HI
However I'll try and give you a better verbal description. For one
bracket : From the 2" x 1/8" steel strip cut three pieces (a cut off
saw works great, and clean them up with a bench grinder) , 2 ea
about, 3" to 4" long, and 1ea about 6"-8" long. (if necessary I can
go to my semi-remote EME site and measure them exactly for you)
. For a top bracket, drill appropriate size holes on each end, of
the longer strip, to accommodate the U-Bolts for the tower leg. On
the shorter legs drill 1/2" holes for the bolt that goes through them
and the "rail" leg. These holes should be close to the longer edges
of the 2' x 4' strip.
Now weld the bottom edge of the short strips to each edge of the
longer strip, centering them, so that about 1+" extends out each side
of this now U shaped bracket. The longer strip should be fitted up
between and along the bottom edges of the short strips, with their
1/2" holes being away from the longer strip. It is a help if you
assemble the short strips and a dummy piece of the rail, with a 1/2"
hole near it's bottom, with a 1/2" through bolt, and put this in
place, centered over the longer strip. Tack weld in place and
disassemble and then run welding beads along the inside and outside
of the U bracket joints. The bottom of the "U" is the longer strip.
The bracket for the bottom of the rail is done in the same manner,
but instead of the U-Bolt holes, on the longer strip, you drill holes
for the "J" bolts that will go into the concrete pad.
Let me know if you think that you can "picture" this properly
? Otherwise I'll try to additionally clarify.
73, Chuck W7CS
At 05:23 AM 5/21/2014, you wrote:
>Chuck,
>Could you please send some photos of the brackets?
>73,
>Gordon, W2TTT
>201.314.6964
>
>
>
>
>
>Sent from Samsung tablet
>
>
>
>-------- Original message --------
>From: Chuck Smallhouse <w7cs@theriver.com>
>Date: 2014/05/21 04:08 (GMT-05:00)
>To: TowerTalk@contesting.com
>Subject: [TowerTalk] Mast/tower design close in guyed by shrouds and
>spreaders?
>
>
>For towers of moderate height, 35' to 45', I have successfully
>supported Rohn 45 and 55 towers with quite large 2m EME arrays (8 or
>more 28 ' long yagis and their supporting structures) by using struts
>not guy wires.
>
>I use 24' lengths of the top rail material used on chain link
>fences. It's about 1 7/8" in OD. I weld up saddle type mounts out
>of 2 x 1/8" flat steel plate/strips ( available in 3' to 4' lengths
>at larger HW stores) single holes are drilled in the saddles'
>vertical sides to bolt the top an bottom the 34' rail and the bottom
>ends of the strip is drilled to accept the proper size U bolt for the
>towers leg. The saddles for the bottom of the rail, the bottom strip
>is drilled to accept about 5/8" x 1' to 11/2' J bolts on each end
>that will be imbedded in a cube of concrete, about 1' x1' x
>11/2', these are placed out from the bottom leg of the tower about 6
>or more feet away. These each provide bracing, "guying", in both
>compression and tension. Water pipe could also be used and lengths
>coupled together for a longer length, but would be much heavier.
>
>Standing on the top of the tower with and without these "braces"
>proves the rigidity that they provide, even on a Rohn 55.
>
>Chuck, W7CS
>
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>
>
>
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