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RE: retaining walls

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97 UBC 1621.1.

From: S. Gordin [mailto:mailbox(--nospam--at)]
Sent: Monday, February 13, 2006 3:16 PM
To: seaint(--nospam--at)
Subject: Re: retaining walls

While you are in this code-interpretation mood: where (if at all) does the code (UBC, ASD) require to have a safety factor of 1.5 against wind overturning?   I use that all the time, but now I cannot find it...
Steve Gordin SE
Irvine CA
----- Original Message -----
Sent: Monday, February 13, 2006 3:59 PM
Subject: RE: retaining walls

It is volume 1 of the 97 UBC 106.2  number 5.  It is in most administrative codes in the "building permits required" section.

From: Mark Pemberton [mailto:markpemberton(--nospam--at)]
Sent: Monday, February 13, 2006 2:53 PM
Subject: retaining walls

I was asked by a client which CBC code section specifically requires a building permit for a retaining wall.  I'm sure this is in volume 1 tying into section 1611.6, but I wasn't sure exactly where.  This person also wanted to know if the 4 foot rule (walls over 4 foot from base of footing require engineering) was located in the CBC.  Isn't this a common city code rule, not a CBC requirement?  I didn't have time to research this and just coming off vacation my brain is a bit numb. ;-)

Mark Pemberton, S.E.

Pemberton Engineering
502 Mace Blvd., Suite 2B
Davis, CA 95616

Ph:  (530) 792-0511
Fax: (530) 792-7109