OMF in otherwise wood shear wall system
OMF in otherwise wood shear wall system
(OP)
Variations of this discussion have occurred here before. My particular case falls within exceptions where I can use R=6.5 for shear walls and R=3.5 for the OMF (rather than 3.5 for everything). That makes me happy. I wanted to be sure I am reading exception 3 of 12.2.3.3 of ASCE 7-10 correct. If I proceed with this method do my diaphragms need to be designed for R=3.5 forces? I'm quite sure it does but speaking with other engineers I don't know any that actually do.






RE: OMF in otherwise wood shear wall system
RE: OMF in otherwise wood shear wall system
I'm also assuming you have a flexible diaphragm, 2 stories or less, and are Risk Category I or II.
You design the OMF with R=3.5
The shear wall with R=6.5
And the diaphragm with R=3.5