Started by MushCreek, May 10, 2012, 11:30:04 AM
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QuoteI don't know how thick that is.
Quotec. Building width is measured perpendicular to the ridge. For widths between those shown, spans are permitted to be interpolated.
QuoteYou're looking for perfomance of the joists to be l/480 but to get that "feel" the girders need to be l/600 or stiffer, its a sum of parts problem. Putting l/480 joist on an l/480 girder does not give an l/480 floor.
Quote from: MushCreek on May 10, 2012, 03:04:12 PMHmmm. My barn is spanning over 10' with three 2X10's, and that floor feels like concrete- very stiff. Not as big a span on the rafters, though. I'll have to try to figure out what the load is. It looks like about 5500 lbs, doing a rough guess.The lumberyard ran a calc on it, and said a 3 ply 11-7/8" LVL meets my specs. By that, they mean 3 LVL nailed together. I don't know how thick that is. I do know it's expensive, and will require a crane to install that beast. The lumberyard will include engineering, though.