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Seismic R values for a covered patio with mixed, steel ordinary moment frame and CMU shear wall

Seismic R values for a covered patio with mixed, steel ordinary moment frame and CMU shear wall

Seismic R values for a covered patio with mixed, steel ordinary moment frame and CMU shear wall

(OP)
I'm designing a detached covered patio with steel ordinary moment frame and CMU shear wall. The rafters are supported by a steel beam on one side and a CMU wall on the other side (see diagram).
So my question is what R value should I use to design the CMU wall and the steel frame? Thank you so much.

RE: Seismic R values for a covered patio with mixed, steel ordinary moment frame and CMU shear wall

I believe that the CMU and steel frames both constitute their own, lateral framing lines and can, thus, each use their own respective R-values per ASCE7

RE: Seismic R values for a covered patio with mixed, steel ordinary moment frame and CMU shear wall

I second this. Specifically ASCE 7-16 Section 12.2.3.3 has an exception that For RC I or II, Two stories or less, and Light frame/Flexible Diaphragms, then the R value can be taken on each independent line of resistance.

RE: Seismic R values for a covered patio with mixed, steel ordinary moment frame and CMU shear wall

Agreed with KootK, specifically reference the EXCEPTION under ASCE 7-16: 12.2.3.3 for using R-values for individual lines of resistance

RE: Seismic R values for a covered patio with mixed, steel ordinary moment frame and CMU shear wall

Aha! Drift beat me to it.

RE: Seismic R values for a covered patio with mixed, steel ordinary moment frame and CMU shear wall

This is the kind of stuff that is ripe for the picking on the SE test. Easy question as long as you know where to look :D

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