[TowerTalk] Mounting a 4x4 in concrete

[kb9yku]

i wpi;d bet the thing you was talking about  would not hold a 20 ft  4 by for
butt a steel channel would  or 2 steel channels
thay mite go 2-3-4 ft in the cocreate  and  2-3-4 ft high and  sandwich 
the  3 by 4 in steel channle     butt i would  pull  on the steel 
channel  not  pull side ways on it ware the boults was the only thinmg 
holding it steel  gos on the hard pull side and other side if you use 2 
steel channels

ken kb9yku

At 11:45 PM 10/26/2004, Derek Cohn/WB0TUA wrote:
>Dear All,
>
>I'm trying to elevate my very low dipole that is fed with balanced 
>line.  I'm trying to go with a non-metallic support so the balanced line 
>does not interact.  My dipole is currently 18' in the air.
>
>I recently purchased a 22' fiberglass mast from The Mast Co.  This is 
>their heavy duty windsock pole.  I'm planning on mounting it to a 20' 
>redwood 4x4 with the Kwik-Block mounting blocks they also sold me.  I plan 
>to set the 4 x4 in concrete.
>
>I checked around and one of the local deck builders says I need to put 
>about 4' of the redwood 4x4 into the concrete.  That would reduce my 
>effective height of the 4x4 to 16'.  If I overlap the fiberglass mast a 
>foot or two, I have 16' + 20' = 36' which is roughly double the height I 
>have now.
>
>What do you guys think about the 4' of 4x4 into the ground.  Too much, too 
>little, just right?  I noticed that you can put l-bolts into the concrete 
>footer and mount a u-shaped bracket on top of the footer that will accept 
>the 4x4.  This is advertised for deck applications and I think it wouldn't 
>support 20 feet of 4x4.  However, it would give me four more feet of 
>height if it could be made to work.  Has anyone tried this?
>
>73,
>
>Derek Cohn
>Morse Telegraph Club - Alton Chapter
>Telegraph Office UD, sine DJ
>Amateur Radio Station - WB0TUA
>1969 M274A5 Mechanical Mule
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