On engineering my own trusses I guess I been doing it all wrong. I've seen engineered trusses fail. I've seen the supposed best trusses fail. After reading all below there was BUT on reference to the use of graded lumber, #1 and/or #2 best. Personally the choice of wood is 1/2 the most important part of my truss. Fir being my favorite, spruce is way down the line, and yellow pine an aged old no-no. (yellow pine becomes directly proportionally more brittle with age) As for dimension size only one criteria applies, "No plank is any stronger than the the wood left around a KNOT!!! To me he weakest link (yes-link) in any truss is the chord. I've seen trusses made with 2"x6" rafters and 2"x4" chords. Personally I find this rather dangerous. What the? The chord holds the whole truss together! As far as gussets are concerned I put my trust into play wood gussets (no less than 1/2" thick) waterproof glued, a few galvanized nails for immediate tacking and the then cadmium plated heavy duty all purpose screws to finish. I've never had to ever repair one of my trusses. Can't say that for those engineered and factory manufactured. My construction on the job framing, trim, and commercial apprenticeship training started in 1948. At the latest rate of inflation this is my $0.04 worth. Fernan
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Today's Featured Article - Tractor Generators - by Chris Pratt. As a companion to the articles on three-brush and two-brush generators, it seemed fitting that we should provide our readers with a description of how a generator works in lay terms. The difficulty with all those "theory of operation" texts is that they border on principles of electricity or physics and such. Since I know nothing of either, you will have to put up with looking at the common sense side of how generators work which means we "
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