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In a couple of weeks, I'm going to have to make a decision on our current project (new construction) to possibly substitute the specified 2x12 rafters with 12" 560 series TJI rafters. Since the rest of the house (floor frames, girders, etc), except for the 2x6 and 2x4 fir stud walls (interior and exterior), is made up of structural lumber, I was thinking of switching to the TJI's. Cost is not an issue, as they are actually close in price.
I would appreciate any feedback from the braintrust called breaktime.