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Old 03-31-2012, 12:32 PM   #1
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roof truss


House built in 1971 has howe trusses spaced at two foot on centre, pitch is 4 12 the trusses are 2x4 top and bottom anybody know what the span would be that the truss would carry

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Old 03-31-2012, 12:45 PM   #2
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The maximum span the truss is rated for is a function of the load, and the strength of the lumber used to make the truss. The load is a function of your location and the code you operate under. The rating of the lumber can be supplied by the truss manufacturer, whose name is probably stamped on the trusses. I suggest you contact them, they probably know exactly what span their truss was designed for, based on your location.

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Old 03-31-2012, 01:15 PM   #3
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roof truss


hi, ive done a lot of framing what are you concerned about ? load-or rot, what size of bottom cord does the truss have 2x4 or 2x6 ? that will tell you alot are you wanting store stuff up there or ?
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Old 03-31-2012, 05:12 PM   #4
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roof truss


Im not worried about rot im concerned about load the bottom is 2x4 I want to remove a centre wall below them and am wondering if it can be done. What confuses me is my garage which is attached to my house uses the same truss has no beam down the centre where in the house there is
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Old 03-31-2012, 05:41 PM   #5
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roof truss


You might get 2 of these. I posted an answer and it vanished so here it is, (again maybe). Normally trusses are designed to span from outside ends of the bottom cord, or sometimes there is a vertical bearing block from bottom to top cord. If the center wall has one plate at the top, or has studs 16" on center with one top plate then it shouldn't be a bearing wall. If the truss has a simple W bracing it should be a clear spanning design. The manufacturer will probably ask questions like this.
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