In a message dated 6/26/2007 1:41:38 P.M. Pacific Daylight Time,
towertalk-request@contesting.com writes:
> When Bob, NA6T posted this reply I thought the amount of concrete sounded
a bit high. I checked the Radian site and sure enough that is what is
listed. So I drug out my old Peoria Rohn Catalog, circa 1983 and researched
base
dimensions. Peoria Rohn specs call for a 2' X 2' by 4' deep hole for the tower
that Bob, AD5VJ is installing. It calls for guy anchors of 2' X 2' by 1'
deep.
Which raises the question: Did Radian re-engineer the base dimensions or did
the fear of litigation cause Radian to up the numbers?
In 1983 there wasn't a tower standard - now there is - the TIA-222-G
Structural Standard for Antenna Supporting Structures and Antennas. You can
buy
a copy of it - it ain't cheap at $380.00.
Every time a revision comes out, tower manufacturers change things to
meet the new standards.
As an aside, this standard is for steel towers. Aluminum towers ARE NOT
covered and don't meet any of the specs.
Cheers,
Steve K7LXC
TOWER TECH -
Professional tower services for hams
************************************** See what's free at http://www.aol.com.
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