R Factor - Balcony

[EricM9]

What value of R-factor do you use if your designing a balcony? Do you guys still consider seismic loads for balconies? The plan dimension is 24ft x 10ft.

Thanks!

 

[EricM9]

I believe the correct term is "deck" right? Balcony means there is no external support. So it is a deck. Hope to hear from you guys very soon. Thanks!

 

[JAE]

Correct me if I'm wrong, but the R value to use for portions of the building (such as a deck) should be the same as that for the overall building.

 

[haynewp]

I think I would look at a different R only if the lateral system was independent of the main building. Probably is connected and use the same R.

 

[archeng59]

R = 3, unless you are doing special seismic detailing per AISC.

 

[skier1578]

If you have cantilevered columns of some sort supporting your deck, then R=2.2 (per the UBC & CBC table 16-N).