By emcc
Date 06-20-2007 16:00
So, "minimum specified strength of steel" is refering to both strengths simultaneously, simply as a description of the steel grade one is using?
ASTM C76 8.1.8.1 concerning welded splices uses this phrase and it seems that it is asking for one or the other, I was wondering if this phrase shows up anywhere in the D1.1 code?
ASTM C76 8.1.8.1:
When splices are welded and are not lapped...pull tests of representative specimens shall develop at least 50% of the "minimum specified strength of the steel", and there shall be a minmum lap of 2in. For butt-welded splices in bars or wire...pull tests of representative specimens shall develop at least 75% of the "minimum specified strength of the steel".
Is the code incorrect in phrasing this in this way? Which strength should the test use?
I really appreciate your help...this is just a bit confusing. It would seem that testing to only 50-75% of the yield strength would not really demonstrate the strength of the weld, whereas testing to 50-75% of the tensile (ultimate?) strength would demonstrate the strength of the weld...However would 75% of the tensile (ultimate?) strength ever be greater than the yield strength?
I am a reinforced concrete pipe/box culvert design engineer and was just needing some welding expertise.
Thank you for your help...