8"-18.4# I.B.-----steel beam, 1950

[JoeBaseplate]

Working off of 1950 drawings. A roof steel beam is marked as "8"-18.4# I.B". I don't have a copy of the historical shapes in my office and a look thru AISC website did not produce any productive results.

Would anyone know if this beam is same as W8x18 and what grade steel would it be?

Thanks,

 

[Teguci]

Pretty sure you want to look at the S8x18.4 with tapered flanges, etc..

 

[JoeBaseplate]

Teguci,

thanks, that makes sense. Any idea what would have been the grade for S & W shapes in 1950?

 

[paddingtongreen]

That's a long way back, but I'm pretty sure we used A36.

This,

http://www.bgstructuralengineering.com/BGSCM/BGSCM002/index.htm

seems to confirm my memory

Michael.
Timing has a lot to do with the outcome of a rain dance.

 

[Teguci]

33 - ASCE 7
4th Edition to AISC - 1945 - Allowable Tension and Bending = 20ksi

 

[ToadJones]

Paddington-
Your link mentions "A6" being used in early 1900's....is that supposed to be A7?