Firewall Stud 40% Capacity

[XR250]

Is this for gravity loads only or does wind need to be included? Thanks!

 

[phamENG]

I'd assume gravity loads only, though considering tension/ compression chords for shear walls with that reduction may be necessary. I'd pull the actual assembly description. I believe it references another document that goes into more detail on how to apply capacity reductions.

 

[phamENG]

Hmm...maybe I was wrong. Doesn't seem to shed any more light on it. I guess I got it confused with the Limit State conversion bulletin.

Here are a few things that may help:

thread507-436748

DCA 3: Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies

 

[Aesur]

Welcome to the world of fire design controlling stud design, we run into this quite a bit with apartment designs. I recommend pulling their ICC report, normally I see that it says Fc' is limited to the lower axial capacity and they provide a max vertical loading in said reports. This may be their ICC, couldn't find much on their site: Link.