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Old 03-12-2007, 05:51 AM   #1
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sagging roof and ceiling


here is the problem, the roof and the ceiling have a 4 inch drop over our 2car garage. Stick built. I am thinking of building 2x12 beam to go under the ceiling joist and jacking it all back up or purchasing 4 or 6inch steel H-beams and doing the same jacking. what do you think? thanks
ron

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Old 03-12-2007, 07:11 AM   #2
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sagging roof and ceiling


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here is the problem, the roof and the ceiling have a 4 inch drop over our 2car garage. Stick built. I am thinking of building 2x12 beam to go under the ceiling joist and jacking it all back up or purchasing 4 or 6inch steel H-beams and doing the same jacking. what do you think? thanks
ron
First things first - Have you inspected the roof area from the inside (Rafters, ridge beam, joists) to see if any of those structural members are cracked or damaged and need replacement?

Secondly - To jack up the ceiling joists of the garage will not raise the roof's sagging ridge beam if it is a typical framed garage structure.
See illustration below:


(Illustration found on qcfocus.com)


Last edited by AtlanticWBConst.; 03-12-2007 at 07:48 AM.
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Old 03-12-2007, 11:06 AM   #3
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sagging roof and ceiling


Can you post photos of the exposed joists and rafters?
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Old 03-13-2007, 06:26 AM   #4
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sagging roof and ceiling


I don't see any structural damage, the rafters and joist are 2x6, stick built truss. I have placed a jack under one joist and pushed it 2 inchs of the 4 and could notice a difference on the roof line. but this only pushed one of the 24' span.
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Old 03-13-2007, 07:21 PM   #5
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sagging roof and ceiling


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I don't see any structural damage, the rafters and joist are 2x6, stick built truss. I have placed a jack under one joist and pushed it 2 inchs of the 4 and could notice a difference on the roof line. but this only pushed one of the 24' span.
Since this is a 2 car garage - You could do a steel beam, you could also do LVL's (rather than 2 x12's)....
Again, you will be able to raise the ceiling, but the roof's ridge beam will unlikely raise with it.....


Just realize that a 4" drop is a considerable sag. There will be alot of stress placed on the already sagging joists....... jacking these up....You could split some of the joists in the process.....

Last edited by AtlanticWBConst.; 03-13-2007 at 07:26 PM.
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