Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

RE: Garage surcharge

[Subject Prev][Subject Next][Thread Prev][Thread Next]
A 2 foot surcharge is found in the AASHTO provisions for earth pressure
loading. '3.20.3 When highway traffic can come within a horizontal distance
from the top of the [earth retaining] structure equal to one half its
height, the pressure shall have added to it a live load surcharge pressure
equal to not less than 2 feet of the earth.'


Brent R. Koch, P.E.
Koch Engineering, Inc.
Livermore, CA

-----Original Message-----
From: Dmitri Wright [mailto:dmitri(--nospam--at)] 
Sent: Wednesday, June 30, 2004 09:39 AM
To: Seaint
Subject: Re: Garage surcharge


A "rule of thumb" method I have seen used by many engineers (and that I use
myself) is to add a fictitious 2 feet of soil to the retained soil.  This
works out to a 200 to 250 psf distributed surcharge depending on your soil
density.  I don't think this is in any code, but it is quick and easy, and
can be justified by soil stress distribution theories if necessary.

Dmitri Wright, PE
Progressive Consultants Inc.

******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at:
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*   Questions to seaint-ad(--nospam--at) Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: 
******* ****** ****** ****** ******* ****** ****** ********