Having just been through the tower permitting process in Pima County,
Arizona I would offer the following: UST HDX-572:
If you need a building permit AND the project needs to be inspected by a
licensed Professional Engineer and/or by the county, do not deviate from
the manufacturer's foundation specifications without a PE signing off on
the changes, you'll probably fail the inspection if the foundation
doesn't match the specs.
I found Pima County very easy to work with, the entire county process
was done on-line, the county's final inspection was done by Skype video
conference. The required inspections were performed by an on-site
licensed PE, the county provided a list of authorized engineers, his fee
was minimal:
Inspections:
- Embedded Bolts set in the hole according to documented specs
- The PE measured all vertical and horizontal rebar placement, the
distance to the sides of the undisturbed earth, the distance between the
top of the form and the top of the rebar cage. He also measured the
distance between the bottom of the rebar cage and bottom of the hole.
We made one mistake that he called out and asked to be corrected and
photographed. The 3 courses of horizontal rebar at the top of the cage
must be each separated by ~1.5 inches to allow for concrete to fully
encase each horizontal piece, I had them bunched together.
I took the rebar inventory from the UST document to a local rebar firm,
they did the cutting and bending. 377 pounds of material, they placed
the finished product on my pick-up truck bed, $240.00.
We built the cage above ground and used a backhoe to place it in the
hole, per the specification - no welding allowed.
I would like to say I knew how to do all of this, but I didn't. Had help
from a local who has previously installed commercial towers, and his
employee.
Cheers,
Gene K5GS
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