Thanks Teguci, but I should have clarified that I have closed stirrups. ACI 318 12.13 doesn't seem to have anything on closed stirrups, unless I am missing it. Any thoughts on the requirements in the case of closed stirrups?
Does anybody know if ACI requires longitudinal beam reinforcement to be in the corners of the beam (i.e. in the corners of the stirrups)? Due to an interference, I'd like to locate a top bar about 4" in from the edge, rather than in the corner. Thanks.
Does anybody know of a reference that requires or suggests the use of the overstrength factor (or other multiplier) when R=3 is used for a structural steel system? Clearly the AISC Seismic Provisions do not apply when R=3, but is there another Code reference with a direct requirement, or...