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RE: Soils Reports

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I don’t know about Cali, but in my neck of the woods, we have vastly varying soils within a subdivision.  Just going across the street we see a completely different soil.  One house I had to do a condition assessment on was built ½ on an expansive clay and the other ½ on a collapsing sand.  You should have seen the look on the Geotech when they were running a water level.  Turns out a deep foundation should have been required, and we ended up doing a helical pier underpinning effort.  In N.W. Wyo, I recommend it to everyone building to get a geotech report.  For us, it’s more than just soil bearing pressure, but also soil reaction.  Don’t know what the soils are like in Cali.



David Maynard

Gillette, WY

From: Steve Gordin [mailto:sgordin(--nospam--at)]
Sent: Monday, July 21, 2008 6:27 PM
To: seaint(--nospam--at)
Subject: Re: Soils Reports




It was discussed earlier in the year.  In my experience, in 80% of the projects, 1,000 PSF suffices (as it should), if not - find a geotech familiar with the area to write a memo reflecting the requirements of the 2007 code (another 15%), if not - then a full blown soil report will be required.


V. Steve Gordin, SE
Irvine CA




----- Original Message -----

Sent: Monday, July 21, 2008 14:37

Subject: Soils Reports




In the new 2007 California Building Code -- section 1802 requiring a soils report for all new projects - even single family homes!  what is the reason for this .  Do the geotechnical engineers need more work - Were there any spectacular failures I missed that caused this provision?

any comments or insight


Tim Rudolph

Bishop CA