Gus wrote:
"These bolts are 12 inches in length 9 inches in the concrete and 3
inches extending for the tower base. If I guy the bottom section and use
a fairly light antenna (HF quad) will I be okay?"

I am not a civil engineer, but I have erected countless towers. My
degree is in electrical engineering.

Once the guys are satisfactorily in place, you have no need for nuts on
the tower base bolts. There is no overturning force on the tower. It is
resisted by the guywires. If you have a guywire accoident, you may be
glad you have nuts on the tower base bolts. It`s happened to me and
though the tower bent over like a fishing rod with a big catch, no harm
was done. The manufacturer was in PA, Stainless Manufacturing, and the
towers were ordinary tubular steel. Sawing open a tube showed a pristine
interior. No rust.

Best regards, Richard Harrison, KB5WZI