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Re: Performance-Based Seismic Design, Potent

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Thank you, Roger,

You put my concerns into words.  

My work is nearly 100% industrial.  I am grateful for codes.  Often, people
in the field (plant, mill, whatever) look at a structure and state with
confidence, "That structure is 50% overdesigned".  

My answer is, "It may be, but the code won't permit me to design for less".
 And I show him why.  If the owner dictated design critera (and he would
like to), he would call me back when the structure failed after plant
maintenance personnel cut out all the bracing.

Fountain E. Conner, P.E.
Gulf Breeze, Fl. 32561

> From: Roger Turk <73527.1356(--nospam--at)>
> To: seaint(--nospam--at)
> Subject: Performance-Based Seismic Design, Potent
> Date: Thursday, August 13, 1998 11:33 AM
> Building codes have progressed based on what hasn't worked.  To go to a 
> "performance based design" scheme would be to regress 100 years, throwing
> all that has been learned in the past.
> If an owner is permitted to set his/her own design criteria, what need is

> there for building departments?  Every plan could be designed to a
> criteria.
> Some buzz words sound good, but never really say what they mean.
> A. Roger Turk, P.E.(Structural)
> Tucson, Arizona