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Re: Earth friction on sonotubes

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I was about to reply to this line until I read Bill's response and decided that I didn't need to.

The only things not mentioned by Bill are potential frost jacking and minimum depth of cover for frost protection to prevent uplift from frost penetration.

Since Drew posted his question from Alaska I assume that he knows about these things. If not, please ask and I will reply.



On 24/02/2014 10:17 AM, Polhemus, William wrote:
I doubt seriously you will find any geotech who would agree to his

IBC aside, in the typical geotech report I see where uplift is addressed
regarding deep foundations, the geotechnical engineer will disregard from 5 to 10 feet of the soil from grade as "disturbed" or what-have- you.

A geotech report done late last year for a location near the Houston Ship
Channel that I'm using right now for foundation design, disallows the upper FIFTEEN FEET of soils for uplift resistance.

-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On
Behalf Of Drew Morris Sent: Monday, February 24, 2014 10:49 AM
To: seaint-seaosc(--nospam--at)
Subject: [SEAINT-SEAOSC] Earth friction on sonotubes

I am reviewing the design of a foundation for a small barn for horses, 30' x 36'. The designer is using sonotubes of various diameters with an embed depth of 2'-6". To counter the uplift, the designer is using the

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