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Old Style steel shapes

Old Style steel shapes

Old Style steel shapes

(OP)
I am curious about the old style way of designating steel sections...in particular, I am evaluating floor loads in an old bldg in Buffalo, NY, and the sections called out are:

21 WF 68
21 B 49

I can only assume the first number is the depth, WF is 'wide flange' and 68 is the weight per foot.  However, 'B' is something with which I need help.  I have a 1947 AISC Manual and a 1967 Manual to help me and the B shapes are Light Beams.  The 21 B 49 is not in there.  Help!  Thanks in advance!!

RE: Old Style steel shapes

You should look in the FAQ section of the Structural forum.  There is a note in there for an AISC publication which details sections by most suppliers from 1853 - 1950.  You will find your section there.

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