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Old 12-02-2008, 01:22 AM   #1
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Gambrel roof integrity


I need to convert my 1 1/2 story detached garage into a mother-in-law living space - it has a gambrel roof. With a 22' width and no support columns, the 2nd story floor joists are 2" x 8"s and understandably have sagged. I would like to open up the space by removing the floor joists for an exposed-beam look, but don't want to compromise the integrity of the roof (or entire building for that matter). Virtually all the plans I've seen assume that you want a 2nd floor.

Question - do the floor joists provide strength for the roof and overall integrity of the building? Can I remover them completely or would I need to put up scissor rafters or in effect, raise the height of floor joist to just under the second slope of the rafters or other alternate bracing? Don't want it to implode!

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Old 12-02-2008, 06:29 AM   #2
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Gambrel roof integrity


On a gambrel roof those floor joists must stay intact, or else the walls will thrust outward and the ridge will start to drop. there isn,t much you can do with a Gabriel other then ruin its integrity.

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Old 12-02-2008, 10:49 AM   #3
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Gambrel roof integrity


Many thanks BB. My gut told me the same thing, but I was hoping someone out there had a silver bullet. Thanks for the straight-shootin' BulitBob.
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