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RE: Embedded Pole (UNCLASSIFIED)

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Classification:  UNCLASSIFIED 
Caveats: NONE

The 2006 IBC also says you can tamp in clean sand in 8" lifts in the annular
space.  This is not saying that you can put 3 feet of sand all the way around
your column and say the column width is 6 feet diameter.  

I thought I had seen some design guide for fences that said you could pack
gravel around the column to increase the effective diameter.

-----Original Message-----
From: Mark E. Deardorff [mailto:mdeardorff(--nospam--at)burkett-wong.com] 
Sent: Tuesday, January 30, 2007 7:33 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Embedded Pole

In the '97 UBC you may use either concrete OR clean sand in the annular space
around the post. 1806.8.3.
 

Mark E. Deardorff

Structural Engineer



3434 4th Ave

San Diego, CA 92103

P 619.299.5550 x348

F 619.299.9934

mdeardorff(--nospam--at)burkett-wong.com

 


________________________________

	From: M. David Finley, P.E., P.A. [mailto:davidfinley(--nospam--at)bizsea.rr.com] 
	Sent: Tuesday, January 30, 2007 6:54 AM
	To: Seaint(--nospam--at)Seaint.Org
	Subject: Embedded Pole
	
	
	It is not uncommon for a directly embedded pole (sign column, traffic
signal pole, utility pole, etc.) to have a concrete "collar" cast around it.
This is typically done by setting the pole in the drilled hole and then
backfilling with concrete.  The result is an increased width of the structure
which increases the resistance to overturning.  Pretty standard stuff.
	 
	But how about if tamped gravel is used rather that concrete?  It
stands to reason that the gravel should provide greater capacity than just
the pole alone, but certainly less that the concrete collar.  Does anyone
know of a reference addressing this?
	 
	TIA,

	David Finley 
	M. David Finley, P.E., P.A. 
	2086 SW Main Boulevard - Suite 111 
	Lake City, FL  32025 
	386-752-6400 

	 

Classification:  UNCLASSIFIED 
Caveats: NONE


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