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Is lag bolting the bottom chord of a truss to the top plate of a wall a proper fix to correct truss arching assuming the attic is properly vented?

April 26, 2017bolting chord Fix lag plate truss wall

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Is lag bolting the bottom chord of a truss to the top plate of a wall a proper fix to correct truss arching assuming the attic is properly vented?

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We, as an industry, do not suggest attaching the bottom chord of a truss to the partition wall as a proper preventative measure against truss arching. This will not prevent the truss from arching in response to the moisture content differential between the top and bottom chords. In some cases, the attachment of bottom chord to the partition wall has lifted the entire wall assembly as the truss arches.