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- To: seaint(--nospam--at)seaint.org
- Subject: For the Record
- From: GSKWY(--nospam--at)aol.com
- Date: Thu, 16 Oct 2003 10:01:24 EDT
For the record, I am not an employee of CRSI. I do work for them in the sense that I write and edit technical publications for them. Writing and editing technical publications is a large part of my consulting business. I threw in the reference to CRSI lest I be accused of having a bias against fibers. I don't, I see nothing wrong with putting cat hair in concrete.
I also don't see that my postings have improved. In fact, I think all of my postings have been both tremendously witty and very informative. In particular, I try to make sure there is some element of useful information in each post.
For example, I would not recommend that someone use 12x 12 - W18 x W18 mesh. This is not what I consider useful information. Although I am sure a company like Ivy Steel would make it, it would probably cost several times more than using bars.
If I were to post on that subject though, I would note that wire mesh is typically specified at the same size as bar when doing work in accordance with ACI 318. (A W18 wire is not equivalent to a #4 bar, since the 18 indicates the area is .18 sq. in. versus a #4 bar which is 0.20 sq. in.)
If this were a slab on grade, you would not have to use an equivalent amount of steel. If this were a slab on grade, one could use the yield strength allowed by ASTM and CSA, rather than what is allowed by ACI 318. ASTM and CSA measure the yield strength at a strain of 0.5 % versus ACI 318 which requires the yield strength be measured at a strain of 0.35%. The ASTM and CSA minimum yield strengths are 65 ksi for plain wire reinforcement and 70 ksi for deformed wire reinforcement.
The yield strength measured at 0.35% strain is higher than 60 ksi, but not enough so to make it worthwhile for a contractor to seek approval for a specification change, which they would need to, if they were using less steel.
In a message dated 10/16/2003 3:10:00 AM Eastern Daylight Time, sfaiz(--nospam--at)saudioger.com writes:
Ever since you joind CRSI the quality of your postings on this LIST has considerably improved and do show the colors of a person engaged in Research. Keep up the good work!
Syed Faiz Ahmad; MEngg, M.ASCE
Senior Structural Engineer
Saudi Oger Ltd
Riyadh, Saudi Arabia
From: GSKWY(--nospam--at)aol.com [mailto:GSKWY(--nospam--at)aol.com]
Sent: Thursday, October 16, 2003 5:30 AM
Subject: Re: Water Proof Membrane
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