Steel beam in 1968
Steel beam in 1968
(OP)
Hi Fellows
I am designing an extension for an old building. And I digged out some old drawings. The design was on 1968. My question is at that time, the steel beam is present eg.( I 12" x 5" x 30 # ), Is it 12" - depth, 5" - flange width, and what is 30# mean (I assume it is thickness, but what is # related to ")? The drawing looks like it is the taper flange beam? could i assume it is uniform thickness? In 1968, would I assume the steel strength 250Mpa yield and 410Mpa ultimate? Where I can find out more infomation?
Thank you for your help!
I am designing an extension for an old building. And I digged out some old drawings. The design was on 1968. My question is at that time, the steel beam is present eg.( I 12" x 5" x 30 # ), Is it 12" - depth, 5" - flange width, and what is 30# mean (I assume it is thickness, but what is # related to ")? The drawing looks like it is the taper flange beam? could i assume it is uniform thickness? In 1968, would I assume the steel strength 250Mpa yield and 410Mpa ultimate? Where I can find out more infomation?
Thank you for your help!





RE: Steel beam in 1968
The 12 x 5 is the depth by width in inches (taper flange beam).
Weight; 30 lbs/ft
average flange thk; 12.9mm
web thk; 8.4mm
Ixx; 206.93 in4
Zxx; 34.49 in3
Sxx; 39.68 in3 (plastic mod.)
For sections thicker than 0.25 in, yield stress is 230 MPa and UTS is 415 MPa min., assuming it was produced to the usually specified AS.A149. (If AS.A157 was used these values could be down to 178 and 309 MPa, but I would think it unlikely.)
RE: Steel beam in 1968
RE: Steel beam in 1968