Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

10/lw term in calculation of rho

[Subject Prev][Subject Next][Thread Prev][Thread Next]
In a 10/25/99 post by Robert Shaffer, he commented that if you have less 
than a 10 ft shearwall you are penalized by the 10/lw term when calculating 
ri.  I attended an SEAOC/ICBO seminar here in Seattle a couple of weeks ago 
on the Seismic Design Manual, Vol 1.  One thing that the moderator brought 
to light is that the term 10/lw was never meant to exceed 1.0.  Apparently 
this fact is not documented in the 1997 UBC or commentary.
So if your structure has shearwalls less than 10 ft long there is no 
penalty.
The little things they (the code folks) forget to mention!

Dan Morrow, EIT