[TowerTalk] Digging a 5'x5'x7' hole in sandy soil

[Steve Jones]

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 at contesting.com] On Behalf Of jeffhook at comcast.net
Sent: Tuesday, August 13, 2013 3:58 PM
To: towertalk at 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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