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Old 06-11-2010, 12:44 PM   #1
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framing spacing on duct soffit box


I know that for hanging 1/2" gyproc on ceilings the members should be 16"oc, but I'm wondering if I can get away with 24"oc for framing in ductwork where the box will be about 5' wide. Will the gyproc sag? I plan to finish this part of my project tonight, so any thoughts would be great.

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Old 06-11-2010, 01:02 PM   #2
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framing spacing on duct soffit box


Use 5/8" drywall for 24" spacing, the 1/2" will eventually sag.
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Old 06-11-2010, 11:15 PM   #3
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framing spacing on duct soffit box


Read fast, then: http://www.gypsum.org/pdf/GA-216-07.pdf

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