Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
(OP)
I like to know if the allowable stresses for example for beam design for a cold formed still is lower or higher tahn allowable stresses for hot rolled steel.
Is it conservative in absense of having cold formed steel code, using the allowable stress values from AISC (hot rolled steel)?
Thank you
Is it conservative in absense of having cold formed steel code, using the allowable stress values from AISC (hot rolled steel)?
Thank you






RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
That being said, for most cold formed steel design, you do not need the AISI Manual. Go to a manufacturer's website (such as Clark Dietrich), and you will find many design resources.
DaveAtkins
RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
Thank you for your input. But in general I am curios that for flexural members in general how is the allowables stresses compare to hot rolled
Fb = 0.6Fy and Fb=0.75Fy become lower or higher?
I have special situation that for the bending of a small cold formed steel plate, hot rolled allowable stress was used (Fb=0.75Fy), just want to know if it makes a big diference or not?
a 2' by 3' 1/4" plate.
Thank you
RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
Therefore, the AISI code has allowable stresses more governed by local and overall buckling rather than yield. So the answer to your question is that it
depends on the shapes you are looking for.
It also depends on the grade of steel used for light gage - i.e. Fy = 33 ksi vs. Fy = 50 ksi.
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RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
Faith is taking the first step even when you can't see the whole staircase. -MLK
RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
The plate is 2'x2' and 1/4" thick the Fy is 34,800 psi
to find the thickness of plate Fb-0.75Fy was used. My question is it conservative or dangarious?
Trying to get in a simple language the difference is allowable stresses difiend in cold form and compare to hot rolled.
Thank you
RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
So your design is correct.
DaveAtkins
RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses
Check out Eng-Tips Forum's Policies here:
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RE: Cold Formed steel Allowable strseses compare to Hot rolled Allowables stresses