Say AL W. I have a Q. what is the wind survival speed on a house bracket
? just curious?
most installs up here in MI. are cement our wind avgs. are 75 mph.
non-straight line winds.
mark h. ab8ru
Al Wolfe wrote:
>Doug,
> For what you plan to do there is no reason at all to use concrete. Back
>in the Sixties I helped install dozens of thirty and forty foot Rohn towers
>for TV receivers and never used the first bag of cement when using a house
>bracket. Many of these towers are still in use today.
>
> With a good house bracket installation you should be able to go twenty
>feet above the house bracket. Dig a hole about two feet deep and put your
>first section in it. Put a couple of bricks under the two legs next to the
>house. Put an inch or two of pea gravel in for drainage. If you do the house
>bracket right (bolted into something very substantial) it will last forever.
>Been putting them up this way for more than forty years but will quit when
>the first one falls down.
>
> A piece of Rohn 25 will break into before you can move it sideways if
>it's two feet in the ground. I repeat, there is no good reason to use
>concrete with a good house bracket install! Let the house bracket do its
>job.
>
> If you still feel you must use concrete at least keep the top of the
>slab six inches or more below grade. That way when you move you can cut the
>tower off below grade and there is no visable evidence that there was ever a
>tower there. The tower should extend down though the concrete into some
>gravel for drainage.
>
>73,
>Al, K9SI, also 62
>
>
> Date: Tue, 27 Dec 2005 00:40:34 -0700
> From: Doug Fitts W7FDF <[EMAIL PROTECTED]>
>Subject: Tower Installation
>
>My last posting for 2005 with a question:
>
><snip>
>
>So please comment/send thoughts and suggestions on your own experiences
>with tower installatons. I am looking forward to "getting my hands
>dirty", digging the hole for the tower and rebar and pouring the
>cement...and at age 62, I NEED the exercise!!
>
>Best 73 and **Happy Holidays**
>
>Doug Fitts W7FDF
>Vail, Arizona U.S.A.
>Cienega Radio Network
>927.8500/R
>449.925/R
>448.250/R
>IRLP node 3850
>Echolink 47474
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
--
MZ�
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