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RE: snow load surcharge

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At 02:41 PM 9/29/97 +0100, you wrote:
>What's your frost depth?  

18" or 24" by ordinance, 6" to 12" in reality

>-----Original Message-----
>From:	Randy Vogelgesang [SMTP:rvogel(--nospam--at)jps.net]
>Sent:	Monday, September 29, 1997 10:43 PM
>To:	seaoc(--nospam--at)seaoc.org
>Subject:	snow load surcharge
>
>Should the full ground snow load (Pg) be added as a surcharge on the soil
>when desiging retaining walls? 
>
>A friend of mine called me the other day and asked me this question, when I
>told him that I did add a surcharge for snow, he ask me why?  He said has
>done hundreds of retaining walls in this area over MANY years without this
>surcharge and there never been any problem with any of the walls.  He
>offered a possible explaination in that full active soil presssure is
>achieved over a longer period of time, and full Pg usually only occurs for
>less than a month.  Of course it could also be that the traditional way that
>we design walls is conservative enough to account for this short term
>loading without any adverse effects.  The typical Pg in this area is 200psf
>and up.  I would appreciate opinions.
>
>Randy Vogelgesang S.E. 
>South Lake Tahoe
>