I hope you have a very happy birthday today with many happy returns.
Your posting today is another in a long line of thought provoking
contributions you have made in this forum and several others I've had the
opportunity to witness. I think the profession has advanced significantly
because of your efforts to point out problems, inconsistencies and just
plain errors with developing standards and codes and with their use.
Charles Greenlaw, in an earlier post, cited Professor Hardy Cross' three
stages of an engineer's development. Your "third stage" perspective on the
issues facing our profession is certainly appreciated by this writer.
Bill Cain, SE
From: FEMCCLURE(--nospam--at)aol.com [SMTP:FEMCCLURE(--nospam--at)aol.com]
Sent: Thursday, June 03, 1999 0:17 AM
Cc: FEMCCLURE(--nospam--at)aol.com; jheintz(--nospam--at)degenkolb.com;
Subject: Significant Error on Page 295, Seismological
Research Letters, May/June 1999
In my considered judgment, there is a significant error on Page 295
Seismological Research Letters, May/June 1999, published by the
Society of America. This error pertains to the identification of
hazards maps used in FEMA 273, "NEHRP Guidelines for the Seismic
Rehabilitation of Buildings."
On page 295 of this publication in the first sentence in the right
column is the following wording: "The seismic maps that accompany
Guidelines are available at http:geohazards.cr.usgs/gov/eq/"
The seismic maps at this web site are the USGS Seismic Hazard Maps
the maps that are to be used with the 1997 NEHRP, FEMA 273 and 310
provisions which are provided in a "Seismic Map Package" that
three seismic codes and Guidelines.
This serious misinformation helps perpetuate a growing misunderstand
could have serious consequences because the ground motion
presented on the USGS Seismic Hazard Maps is different than the
information presented on the paper format seismic hazard maps in the
Since the article discusses the role of the Degenkolb firm in the
273 Project, if this firm reviews and believes I am correct, then it
considered opinion that it is the Degenkolb firm's responsibility or
responsibility of whomever prepared this article, to correct this
using whatever national forum and format that is appropriate as soon
possible because of the potential legal liability for this
I believe it is not sufficient just to notify the editor of the
Seismological Research Letters because these letters are only
two months and engineers could be using this misinformation right
For a more complete and excellent explanation of the difference in
USGS and 1997 NEHRP, FEMA 273 and 310 seismic hazard maps read E. V.
Leyendecker's January 12, 1999, SEAINT List Server email message
Zones in Texas - Some USGS Comments" , which should be in the SEAINT
If you have any questions, please contact Jon Heintz, Project
the Degenkolb managed "ASCE/FEMA 273 Project" at his email address
jheintz(--nospam--at)degenkolb.com. However, you should read E. V. Leyendecker's
email posting first before contacting him.
I guess someone has to pick out the fly specks out of the pepper.
is a pretty big fly speck.
Frank E. McClure FEMCCLURE(--nospam--at)aol.com June 3, 1999, My Birthday.