to quote the book 'pinned bases must not be used'. think about it, when
there are no guys the highest stress point is where the metal meets the
concrete. each leg must be held down by something at least as strong as it
is. there might be a way to drill holes for each leg and epoxy in a stub of
some kind, but that would be a job for a pro.

"Rick (W-A-one-R-K-T)" wrote in message
news
On Sun, 01 Jul 2007 16:58:42 +0000, Dave wrote:

sorry, think again... no hinge bases allowed on free standing towers.

Hmmm ... OK, I guess I will have to be able to climb it...

I suppose I could install temporary guys while I'm up on it doing antenna
work, but in that location permanent guying wouldn't work too well...

free standing towers must embed the base section in concrete.

How about the BPC25G base plate (non-hinged)?

I already have a concrete base in place, 6 feet deep, intended for the
predecessor to the US Tower MA-series crank-up mast. The mast (and the
base, and the tower on the other end of the house) belonged to my father
when he lived with us, but he sold the mast many years ago, and the new
ones are a bit too pricey for me right now.

So, it's too late to embed the bottom section directly into the concrete,
at least in that location.

On Sun, 01 Jul 2007 20:44:45 +0000, Dave wrote:

to quote the book 'pinned bases must not be used'. think about it, when
there are no guys the highest stress point is where the metal meets the
concrete. each leg must be held down by something at least as strong as
it is.

Yup, makes sense.

Unfortunately the base is spaced out just a bit too far from the house to
be able to add a house brace that's strong enough. Why Dad did that I
can't quite figure out... of course, he had the mast at the time...

Also unfortunately, US Towers tells me that the bolt spacing on my base,
which was for a mast that was manufactured by a company that US Towers
apparently acquired years ago, is wrong for their current crop of crank-up
masts. :-( :-(

So, I guess I have a tower base that would hold up a (proper)
self-supporting tower through a hurricane, but I can't do anything with it. :-(