fwd'd to reflector, because it's a relevant question:
I wrote:
> If your structure has deep eaves, you'll be
> stuck with using the Rohn house bracket. I found that to be more
> flexible than I wished, which drove me to design my own.
>
Bud, W2RU, wrote:
Gee, I wonder if you're thinking of the "older" Rohn brackets? Compared
to the Rohn house brackets I bought a few decades ago for my Rohn 25
towers, the Rohn house brackets I bought six years ago for my Rohn 45
tower are *massive* and about as flexible as a cinder block.
-0-
expanded comments:
Bud...I dunno. May well be. The ones I saw only
intersected two joists, not 3, and they extended out
from the building by 22". I wanted more tie-in to
the structure.
Wiggle, by itself, is a GOOD thing. It dissipates
impulse loads on the structure. So I wasn't totally against
the rohn brackets. My personal problem was lack of access to
the roof and floor joists-- I had to lag-screw into them,
rather than using backing plates. That's why I wanted to tie into
more joists. Being closer to the building was an aesthetic consideration.
Now that I think about it, my impression was formed by a 25G
bracket I had in an earlier installation, not a 45G bracket.
The latter may be considerably more rigid. But still 36" wide,
and not 48...which was a personal requirement.
For the chap who originally asked, however, I believe he's still
constrained by the available engineering data and code compliance
requirements. Gotta use the mfr's data.
N2EA
-----Original Message-----
From: W2RU - Bud Hippisley [mailto:W2RU@frontiernet.net]
Sent: Thursday, June 15, 2006 10:28 PM
To: Jim Jarvis
Cc: towertalk@contesting.com
Subject: Re: bracketed 45G
Jim Jarvis wrote:
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