very simple seismic question

huangyhg

very simple seismic question
calculating seismic base shear using the simplified analysis procedure in ibc chapter 16:
i'm absolutely sure i'm right on this, but i have no one in this office to verify me.  when i pull ss and s1 (mapped spectral accelerations) off of the contour lines on these maps of the u.s. they are given in %g.  for example, for oregon coastline its 125% - 150%.  when i plug these values into equation 16-38, 16-39 -> sms = fass i'll plug in 1.25 or 1.5, correct?
thanks
check out our whitepaper library.
you are right.  the hazard maps use percent (probably for clarity on the map) but the equations use the actual number.  if you are by yourself in an office you might want to get the book by alan williams titled "seismic and wind forces, structural design examples" from the icc. it does help to see worked examples and this is one of the better single books in my opinion.
regards,
-mike
mrmikee,
thanks!  i've been looking for a book with seismic force calculation examples... i'm on amazon looking for a used one now.
the one from structural engineering association of california is good.  sold through icc.