QUESTION
I was working on a job that had trusses that span more than 78 ft. with a 9/12 pitch. We had the #5 truss being installed when the #4 truss gave way. The trusses that were being installed are a two part system. The bottom set is what you would call hip trusses. The trusses contained 2x6 bottom chords, 2x8 top chords and rafters, and 2x4 webs. The roof sheathing was to be 3/4 in. plywood, 15 lb. felt paper and roof shingles. The ceiling was to be 5/8 in. drywall. The #4 truss sheared about 1 in. off the wall. A knot was in that location on the bottom chord and both bottom chord and rafter were splintered apart into strands of wood. Also, the roof rafter on the bottom side (the edge that touches the top edge of the bottom chord) contains wane. Would this truss be considered ineffective? If not, why? How does one choose the size and location of these plates?
I was working on a job that had trusses that span more than 78 ft. with a 9/12 pitch. We had the #5 truss being installed when the #4 truss gave way. The trusses that were being installed are a two part system. The bottom set is what you would call hip trusses. The trusses contained 2x6 bottom chords, 2x8 top chords and rafters, and 2x4 webs. The roof sheathing was to be 3/4 in. plywood, 15 lb. felt paper and roof shingles. The ceiling was to be 5/8 in. drywall. The #4 truss sheared about 1 in. off the wall. A knot was in that location on the bottom chord and both bottom chord and rafter were splintered apart into strands of wood. Also, the roof rafter on the bottom side (the edge that touches the top edge of the bottom chord) contains wane. Would this truss be considered ineffective? If not, why? How does one choose the size and location of these plates?
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