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RE: Hold Downs With No Plywood Ductility

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I second that. I feel the same way about the flood and wind damage pictures that go around at the CEU seminars purporting to be examples of poor design.
As an example, I've seen photos of steel buildings with the roof and wall panels blown off. Without a careful study it is difficult to tell from a photo if the engineer left off a safety factor or if the contractor left off a brace or if the owner left the OHGD open or if the structure experienced loads exceeding the design event.

Christopher Banbury, PE

Ark Engineering, Inc.
PO Box 10129, Brooksville, FL 34603
22 North Broad ST, Brooksville, FL 34601
Phone: (352) 754-2424
Fax: (352) 754-2412

-----Original Message-----
From: Ehrlich, Gary [mailto:gehrlich(--nospam--at)] 
Sent: Friday, May 09, 2008 4:31 PM
To: seaint(--nospam--at)
Subject: RE: Hold Downs With No Plywood Ductility

It's almost impossible to comment without knowing a LOT more details about the testing. Really, one can't comment without reading a full report.

Buddy Showalter, Tom Skaggs, and I could likely fill your e-mail inboxes to overflowing with a discussion of boundary conditions, wall/panel configurations, and their effects on test results. 8-)


Gary J. Ehrlich, PE 
Program Manager, Structural Codes & Standards 
National Association of Home Builders (NAHB) 
1201 15th Street, NW, Washington, DC 20005 
ph: 202-266-8545  or 800-368-5242 x8545 
fax: 202-266-8369 

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