Old time steel shape 21 B 49

[StrP88]

I am trying to get information on this steel shape , "21 B 49"
I dont know where to find some info on it? Such as Fy?
Is it unconservative for section capacity just use 21 W 49? What is potential risk?
Anybody can give me moment capacity of the beam for different lateral supports like we have it for 21 W 49 in AISC 9th Edition

Thank you

 

[BAretired]

As a matter of interest, my copy of CISC Handbook of Steel Construction, Copyright 1967, 1970... Fifth printing March 1975 lists *W21x49 with the same properties as those listed by njlutzwe above.

At the bottom of the page is the note:

* Not available from Canadian mills

BA