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Re: Historical Yield Stress

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On Feb 25, 2010, at 5:07 PM, Richard Calvert wrote:

With that, I am curious if there were common grades used other/ lower than 36ksi for wide flange beams during this period? And am I correct that the use of 50ksi steel was rare during this period (is 36ksi a safe/conservative assumption)?
The member might've been made from ASTM A-7 steel with a minimum yield strength of 33 ksi and UTS = 60-72 ksi. If it were my project I'd consider finding a piece you're going to discard and doing a couple of tests and maybe a rough chemistry, if there's no documentation on the structure. If you're going to weld it, I'd definitely do the testing.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 1864)

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