> I was curious if one ever installed one of these on another concrete
base.
Yes - people do it every day. It just takes a rotary hammer with a
concrete boring bit and then installing the new anchor bolts with
industrial epoxy.
> I have a 4x5x5 that currently has rohn 25 sticking out of it but does
NOT have any rebar installed within. Can one drill holes in the concrete and
mount the tower base?
Maybe. Your existing base has 3.7 cubic yards; the factory
brochure calls for 4.1 cubic yards. While the amount of concrete is pretty
close,
the configuration for the crank-up is different - it's 7 feet deep.
The purpose of the rebar is to keep the concrete from cracking.
Over time, that might be a fatal problem with the lack of rebar - especially
with a free standing tower and that 72-foot lever arm. With a guyed tower,
that isn't a problem.
BTW your Strafford County windspeed rating is 85 MPH. It'd be
difficult - if not impossible - to get a permit for a crank-up for this much
windspeed.
> The specs page talks about J bolts but those would not be feasible.
The benefit of this base is that working on the antennas are facilitated by
roof access.
You just cut off the J-part of the bolts. They are for when you
pour the bolts in the concrete. Actually these days UST welds 2 bolts to the
bottom of the bolts for that purpose.
> My second thought is sucking it up and making a base for it but I have
this beautiful pile of concrete that could be re-purposed.
True. See comments above.
Cheers,
Steve K7LXC
TOWER TECH -
Professional tower services for amateurs
and
UST factory authorized installer
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