If your soil is so sandy that your excavation will cave in, you may not be able
to use the US Tower foundation design. Sandy soil might need a mat foundation
or an upside-down "T" design.
The US Tower foundation design is for "normal soils" which is defined in the
EIA/TIA-222F or G design standard they used. Normal soil has a minimum
compressive strength in psi which sand doesn't meet. You probably should talk
to a local structural or civil engineer about how you may need to modify the
foundation design.
73,
Steve
N6SJ
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
jeffhook@comcast.net
Sent: Tuesday, August 13, 2013 3:58 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Digging a 5'x5'x7' hole in sandy soil
To all:
I have a used US towers HDX 555 I'm installing .
US tower sent me new anchor bolts and a print of foundation and it says
undisturbed soil and forms can't be left in hole.
I live in a sandy area and wonder how others have dug a 5x5x7 hole, installed
reb ar cage, and filled with concrete, without it caving in?
Thanks - Jeff
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