Hello -
My office still uses version 3.0 of RAM SBeam. When analyzing composite beams, I notice in the output that phi factor of 0.85 and 0.9 are used for flexure and shear, respectively. RAM SBeam v3.0 uses the 3rd Edition of AISC LRFD; however, I do not see these factors (I see/am used to phi factors of 0.9 and 0.75 for flexure and shear, respectively).
Can anyone provide some insight? Thanks in advance!
In the LRFD third edition, the phi factor for beam shear is 0.9 (see section F2). It's shown in the output report just in front of Vn in the Shear (ultimate) section.
For flexure, Phi can be 0.9 or 0.85 depending on the state (precomposite or post composite) and that's also shown on the report in the Moments section.
Answer Verified By: Reginald Askew