Need a book? Engineering books recommendations...

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

RE: ASCE 7-05 Cantilevered Columns

[Subject Prev][Subject Next][Thread Prev][Thread Next]
There are cantilevered columns / inverted pendulums in ASCE 7-05 at the back
of the table but with the response modification factors in the code they have
you are practically designing with a base shear equal to the building weight.

-----Original Message-----
From: Larry Hauer [mailto:lrhauer(--nospam--at)] 
Sent: Wednesday, February 13, 2008 12:35 PM
To: seaint(--nospam--at)
Subject: ASCE 7-05 Cantilevered Columns

I'm trying to determine if structral systems that use to be acceptable under
the '97 UBC are even allowed under the '07 CBC/ASCE. Per table 12.2-1 of the
ASCE 7-05, section G, it appears that for Seismic Design Catagories D and E,
(most of Southern California), the following structural systems are no longer
permitted as lateral load carrying sytems:
A wide flange cantilvered column system out of a concrete grade beam at
grade, (i.e. front of garage, etc.).
A pile foundation system supporting light wood framing above, (i.e. two story
residence), unless it is a "Special reinforced concrete moment frame"- i.e.
cantilevered concrete piles no longer allowed.
Am I missing something here, or do these systems go the way of the buggy
Larry Hauer S.E.


Connect and share in new ways with Windows Live. Get it now!

******* ****** ******* ******** ******* ******* ******* ***
*   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: 
******* ****** ****** ****** ******* ****** ****** ********