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RE: Retaining Wall program

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You're right, I shouldn't categorically slam professionals in other states.
I guess a bad experience I once had just keeps rolling around in my head. My
point should have been directed at the issue of regional design practices. I
personally know and respect a lot of resident, Texan structural engineers.
The ones I know do not do seismic design on a regular basis although I know
your firm is of substantial size and does work all over the country. Sitting
here (near ground zero), working on seismic designs every day, living it,
breathing it, etc.  I guess my whole opinion on this that, if one needed a
good reference book on tilt-wall design in seismic zone 4, I would recommend
Hugh Brooks book rather than one written in seismic zone zero or one.
Similarly, if I wanted to find a good reference on slab on grade design for
expansive soils, I would look for something from TX.

Anomalous Bill

-----Original Message-----
From: Caldwell, Stan [mailto:scaldwell(--nospam--at)]
Sent: Thursday, July 09, 1998 7:21 AM
To: 'seaoc(--nospam--at)'
Subject: RE: Retaining Wall program

Hey Bill, you're from Texas and you're clearly an anomaly! {Humor, no
harm intended.}  Don't slam the practice in another state unless you
fully understand it.  Connections on Texas tiltwall projects are
designed appropriately to resist all calculated forces which, as you
note, do not normally include seismic.  However, tiltwall-to-foundation
connection design is not included in any tiltwall design software that I
am aware of.  It is done the old-fashioned way, by hand.

Stan R. Caldwell, P.E.
Dallas, Texas

-----Original Message-----
From: Bill Allen, S.E. [mailto:Bill(--nospam--at)]
Sent: Wednesday, July 08, 1998 6:12 PM
To: seaoc(--nospam--at)
Subject: RE: Retaining Wall program

Maybe it was an anomaly, but my experience with engineers from TX
tilt walls is that they do not see a need to provide a positive
between the tilt-wall and foundation. I doubt if this method of design
be very popular in seismic zone 4. I recommend Hugh Brooks' book on
tilt-wall design and then choose the software of his/her choice or
write a MathCAD template.

Bill Allen