Jim
I believe transferring the out of plane wind load back into the king post and designing that post for Biaxial loading will be the biggest problem.
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
Johnson & Nielsen Associates
Palm Springs, CA
In a message dated 4/21/2009 5:46:24 A.M. Pacific Daylight Time, wilsonengineers@yahoo.com writes:
I have been asked by an EOR to design a 24ft long boxed header with light gage framing. This member will be laterally unbraced in a curtain wall assembly. Are there any practical limits to the span of such a header in a 6" wide wall? The loads are only in the 200lb/ft range vertical. Horizontal loads are less.The "Standard for Cold-Formed Steel Framing - Header Design" by AISI only states length limits for L-shaped headers. Header calcs in this standard only address bending, shear and web crippling. I don't believe that the AISI main spec will adequately model a long-span composite assembly.I would like to either find a conclusive way to design this header or prove that it is not practical.Thanks in advance.Jim Wilson, PEStroudsburg, PA
A Good Credit Score is 700 or Above. See yours in just 2 easy steps!