Go to the Hilti or QuickBolt websote anf you'll find the shear and pullout
specs for masonry anchors.Fred KC5YN
Get organized with Yahoo Mail
On Sat, Mar 24, 2018 at 9:14 AM, Patrick Greenlee<patrick_g@windstream.net>
wrote: Hans, If it seems too good to be true it likely is. Someone may
J-walk
mid block and never look either way for cars and not get killed (yet)
but that doesn't mean it is a safe practice. Tower manufacturers are in
CYA mode and may call for a conservative solution but following their
recipes for rebar cages in concrete foundations is a lot better path
than some non engineered solution on FARCE BOOK. In my personal opinion
the FARCE BOOK solution is a recipe for disaster. Until the antenna is
installed and there is a REAL wind gusting, undercooked pasta might hold
a well balanced tower (for a while.)
There are two kinds of confidence: 1. something is well thought out and
supported by all facts in evidence, experience, and science/engineering
and so is believed until proven otherwise and 2. Something that is
suspect and not accepted until supported by substantial evidence. Much
stuff on FARCE BOOK (or other idiot laden social network apparitions)
is of the latter quality (See #2 above)
Oh, but if apple cider vinegar and a natural replacement for Viagra is
used to "Prime" the galvanized fasteners at midnight under a full moon
then I' sure it is OK.
Patrick NJ5G
On 3/24/2018 8:34 AM, Hans Hammarquist via TowerTalk wrote:
> Dear towertalkers,
>
> The are claims in a discussion on Face Book that an anchor bolt, "5/8 in. x
> 12 in. Hot-Galvanized", is suitable for a free standing tower. Someone even
> claims it is used for a 400' freestanding tower. It doesn't make sense to me
> but I might be overly pessimistic.
>
> I hate to start lengthy discussions and this might be one of them so, please,
> comment only if you have a well grounded answer. I'm sure there are plenty of
> opinions about it like my own, but I would like to know if my guts feeling is
> right or wrong. What I am afraid of is that you can pull out an anchor bolt
> like that right out of curred concrete.
>
> 73 de,
>
> Hans - N2JFS
> _______________________________________________
>
>
>
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