> I have a 165ft rotating tower going up next Spring so will not be
putting a larger tower on this base, but it does sound like I need to get a
fab
shop to just go ahead and build me the base. No galvanizers locally so
paint will have to do.
> I have a concrete base next to my shop that once had 89ft US Crankup
Tower
> on it. The tower is gone, and I acquired a 55ft US Tower that I want to
bolt
> to this base for use in my shop. The bolts that once held the bigger
tower
> is still there, but I plan to cut them off and install chemical anchors
to
> support the smaller bolt pattern. The other option was to fabricate an
> adapter plate that would mate the 55ft tower T-base to the bigger bolt
> pattern, but this sounds like much more work than simply drilling into
the
> concrete and installing new anchors.
>
> I never used chemical anchors for this purpose and would appreciate any
> suggestions on size, and where I can source them. The rebar pattern for
the
> bigger tower is much wider than the bolt pattern for the smaller tower,
so I
> there is little chance for me to hit rebar when I drill. (I suspect I
will
> need a BIG drill).
I assume that the big tower is a Rohn of some ilk. Adapting the base
for the new tower is pretty simple - and you don't need anything fabricated.
There are a couple of tower base options: 1) flat plate for regular
bottom section and 2) pier pin. For 1) you can put the plate on the base and
use a rotary hammer with concrete coring bit to drill out the bolt holes.
I'm not sure what you mean by a chemical anchor but in this case you'd use
some industrial epoxy to anchor the bolts to the concrete. The same with the
pier pin.
Either option works although different folks prefer one over the
other.
Cheers & GL,
Steve K7LXC
TOWER TECH
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