Log cabin Seismic design
Log cabin Seismic design
(OP)
Switching over to the new code (CBC2007 VS UBC 1997). What seismic response modification coefficient (R) should I use for a bearing wall system that is designed out of logs? I can't find anything in the ASCE7-05.





RE: Log cabin Seismic design
In reality, if you model them on the computer, you could rationalize that they are really log moment frame systems with the rods and load bearing points serving as couples to develop the moment.
To keep things simple, I just use 6 or 6.5 for R (ASCE& or IBC). Never had my analysis questioned in ten years of doing them. Maybe because plans checkers really don't understand these animals very well?
Mike McCann
MMC Engineering