I changed the subject.
I searched for "trusses" on Firefox and found a great site from some Canadian truss company. I do understand what a truss is, but what I don't understand is why a home built with "engineered trusses" should have anything to do with whether I tear down a measly 6 or 7 feet of (joist-perpendicular) wall.
Anyway, would I *ever* appreciate some dialogue here on these subjects. I don't even really know what I'm asking, although from my research I realize that if a particular attic joist ends on the measly wall I want to tear down, that wall can't be torn down because it is therefore load bearing.
Well, if anyone understands this, please post on why people ask if you have engineered trusses when the subject is demolition of a measly wall. :)