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AISC DG27

AISC DG27

AISC DG27

(OP)
Does anyone have the AISC DG27?

I have a client who just called an wants to switch a large structure I did from carbon steel to stainless steel and I was surporised that the AISC has published this DG in reference to stainless steel.

I'm wondering if it's easy to work with and how many pages the DG actually is.

RE: AISC DG27

It's 159 pages but the main document is 67 pages. The rest is pretty much commentary. There's a lot of sections that refer back to AISC 360, but there is also some modified equations for flexure.

RE: AISC DG27

(OP)
Great, is it helpful for someone in my situation (familiar with the design of Carbon Steel but not stainless)? Would I be able to make the switch for carbon to stainless using this DG?

RE: AISC DG27

Yes, it's really straight forward and the commentary is helpful and interesting. I refer to it every time I do stainless design, which has been increasing as of lately. The equations are mostly the same, they just change the modulus of elasticity and the coefficients in some of the equations from 360.

RE: AISC DG27

(OP)
I saw that there was a lecture online given by the AISC. Skimming through the slides, it appears as if E is relatively the same (29,000 ksi) however, depending on the shape and grade of stainless, we may be dealing with an up to 35% reduction in the yield strength. On this project, the architect was very particular about the "look" of the structure and we were forced to use certain size members that "looked" better than others.

Are there any concerns with regards to welding like there are with aluminum?

This should be interesting.

RE: AISC DG27

Your right. I always forget which material properties are different from carbon steel and have to refer to the design guide. The welding reference is AWS D1.6. It's really about using a compatible filler material. There are some other limitations based on what type of stainless steel it is.

RE: AISC DG27

Around here there aren't too many companies that are certified to weld stainless to plain carbon steel. Stainless to stainless no problem. If possible a bolted connection to the plain carbon steel is always attractive.

RE: AISC DG27

(OP)
jayrod

This would be a 100% switch from carbon steel to stainless steel (the structure is a free standing tower), so no mixing of materials.

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