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A theoretical question, not a code-based question, because I think my brain's on vacation today: How can it be deemed desirable to have a plastic hinge form at the base of a shear wall? Doesn't a hinge at the fixed end of a cantilever imply instability since there's nowhere else for forces to...

...what is it? Or more specifically, how does it affect design? I understand it has to do with how active and severe a nearby fault is, but don't see where or whether it affects the process of calc-ing design parameters and forces. Isn't this already taken into account in the probabilities...

In Williams' "Structural Engineering PE License Review Problems & Solutions (6th ed.)", problem 1.14, part 2 (dynamic method), he does not scale down the story forces (Fi) by the I/R factor. My reading of ASCE 7-05 12.9.2 is that those forces can be scaled down by I/R (assuming the spectral...

Like-new (purchased new, used for Fall 2011 studying; minimal markings). $75; free economy (7-10 day) shipping to contiguous U.S. PM me if interested.

Results posted in NCEES account (haven't received email notification yet - just obsessively refreshing the page all day!). Passed on first try; 6 years out of school. Big relief! Now on to the SE next spring.