When to use AISI vs. AISC in regards to material thickness? 1

[alt227]

Does anyone know if there is a reference to the recommended minimum thickness one should consider when designing per AISI (cold formed Steel) or the provisions of AISC? I've seen 1/8" as a rule of thumb, but I want to know where that is coming from.

 

[woodman88]

It depends on how the steel is processed. Which is mainly hot-rolled or cold-form.
Per the attached link
“Cold-formed steel (CFS) members... ...These types of sections are cold-formed from steel sheet, strip, plate, or flat bar in roll forming machines, by press brake (machine press) or bending operations. The material thicknesses for such thin-walled steel members usually range from 0.0147 in. (0.373 mm) to about ¼ in. (6.35 mm). Steel plates and bars as thick as 1 in. (25.4 mm) can also be cold-formed successfully into structural shapes (AISI, 2007b).”

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

 

[nutte]

In the 2005 AISC specification, a user note in section A1 recommends using AISI for members that are cold-formed with elements not thicker than 1". (Except for HSS shapes, which are often cold-formed.)

 

[ajh1]

AISI provisions are applicable up to 1" for cold-formed members as noted. AISC generally is viewed as applicable down to around 1/8" for members that are not cold-formed. For example, a 0.120" thick web on a beam would follow AISC, while the same 0.120" in a roll-formed C-section would follow AISI. The dividing line for connections is defined as 3/16" in the AISI specification.