Difference between 10WF21 and 10WF21-S?
Difference between 10WF21 and 10WF21-S?
(OP)
looking at some drawings and there are a bunch of old steel on here. There is 10WF21 and 10WF21-S listed and I was wondering what the difference was. Any ideas?






RE: Difference between 10WF21 and 10WF21-S?
RE: Difference between 10WF21 and 10WF21-S?
RE: Difference between 10WF21 and 10WF21-S?
B ------- Bethlehem Steel Company 1907
C ------- The Carnegie Steel Company, Limited 1893 to 1896
S -------- Bethlehem Steel Company, Beginning 1909
U S -------- United States Steel Company
........... and so on.....
For 10WF21, there is S43 - 1933 and S47 - 1934
You may also search www.aisc.org for data on shapes which are no longer rolled.