CMU wall axial capacity

[BAGW]

Hi,

I have a 80'-0" tall unbraced non-load bearing CMU wall. Not able to get this to work from axial capacity perspective under just the self-weight.

Its 12" CMU wall, fm' = 2500psi, with #6@32" vertical rebars. I have 8" deep bond beams at every 4'-0" spacing. With the bond beams at 4'-0", can I assume the wall to be braced by bond beams for out of plane buckling or do we check the wall for full 80' unbraced length?

Thanks

 

[XR250]

Unless the bond beams are braced against something, then they ain't doin anything for you.
Yea, I can't imagine getting this to work without some sort of periodic bracing.
Doesn't this exceed ACI530 slenderness requirements by a long shot?

 

[SWComposites]

80’ tall, 12 inch wide wall? With no other supports? Yes you will need to use full height for buckling. Can’t imagine it working for a bunch of load conditions.

 

[BAGW]

Yeah though so. I will have to brace it back at the mezzanine level at 40’-0”. Then I can get it to work

 

[BAGW]

Does anyone have an example of CMU shaft wall design? Like an elevator shaft