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Re: Analysis of OLD building

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Hi Dan,

On Tue, 4 May 1999, Dan Vines wrote:

> I am performing a structural evaluation of some buildings constructed in the
> the mid 1950's in the Denver area.  There is a beam designated 24CB87# on
> the "as-built" drawings.  I have located the structural properties for this
> shape in an AISC publication "Iron and Steel Beams 1873-1952" but I can't
> seem to decipher this reference's nomenclature for determining what the
> material properties (fy) would have been.
> It seems to be indicating that 1933 or 1934 ASTM specifications should be
> used, but this seems to pre-date my building (1956) too much.

>From the 5th Edition of the AISC Manual.

ASTM A7-46 
Tensile Strength = 60,000 to 72,000 psi
Yield Point, min, 0.50 tens.strength, but not less than 33,000 psi
Elongation in 2 in., min. 22%
Elongation in 8 in., 1,500,000/Tensile Strength

Edwin R. Schmeckpeper, P.E., Ph.D.
Department of Civil Engineering                   Phone  : (208) 885-6702 
University of Idaho                               FAX    : (208) 885-6608
Moscow, Idaho 83844-1022                          E-Mail : eds(--nospam--at)