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

RE: Connections Designing, General Standards? POLL

[Subject Prev][Subject Next][Thread Prev][Thread Next]
-----Original Message-----
From: Kestner, James W. [mailto:jkestner(--nospam--at)] 
Sent: Friday, May 27, 2005 1:58 PM
To: seaint(--nospam--at)
Subject: RE: Connections Designing, General Standards? POLL

We specify the load that the connection should be detailed for, which is
determined from the load that the actual conection will see.

-----/Original Message-----

Point of order: We don't design for "the load that the connection will
see." We design for the EFFECTS of a hypothetical level of load that is
rationally-derived yet essentially arbitrary.

No one knows what load a member or element, including a connection, will
"see." The maximum load effect on a structural element over its lifetime
may be far less than the design load--it can even be a good bit MORE
(consuming some portion of the "factor of safety" in that case).

This has really become more "real" to me when I have to talk to clients
and/or construction people about why some element in a structure isn't
"overdesigned" even though "they've never seen one designed that big
before, and they've never seen a smaller one fail." The fact is that
something may be underdesigned with respect to building code
requirements, and yet never see a single day of difficulty owing to the
fact that it has never experienced the equivalent effect of the
prescribed live load--or even close.

We structural engineers live in the world of impending catastrophe. But
that's not necessarily the real world.

This email and any files transmitted with it are confidential and intended solely for the use of the addressee. If you are not the intended addressee, then you have received this email in error and any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. Please notify us immediately of your unintended receipt by reply and then delete this email and your reply. Tyson Foods, Inc. and its subsidiaries and affiliates will not be held liable to any person resulting from the unintended or unauthorized use of any information contained in this email or as a result of any additions or deletions of information originally contained in this email.

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