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RE: Identify steel I-beam[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "seaint(--nospam--at)seaint.org" <seaint(--nospam--at)seaint.org>
- Subject: RE: Identify steel I-beam
- From: "Stuart, Matthew" <MStuart(--nospam--at)Pennoni.com>
- Date: Thu, 6 Oct 2011 17:49:31 +0000
- Accept-language: en-US
X-Ray is much more accurate than GPR, but you have to understand how to interpret the shadow images of an X-Ray, which is different from the reflective image of photography.
D. Matthew Stuart, P.E., S.E., F.ASCE, SECB
Pennoni Associates Inc.
I don't think X-Ray will get you close enough for engineering dimensions. It's difficult enough to distinguish between a #4 bar and #5 bar with X-Ray. Besides, X-Ray is a difficult technology to work with. You pretty much have to clear the area for quite some distance. Sonar is probably just as effective, but will also not give you dimensions.
I recommend you chip and repair.
T. William (Bill) Allen, S.E.
Consulting Structural Engineers
32302 Camino Capistrano, #206
San Juan Capistrano, CA 92675
V (949) 248-8588•F (949) 209-2509
I believe you can take X-ray photographs of the column and measure the photograph. Check with the people who do this sort of thing.
H. Daryl Richardson
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