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Old 08-16-2011, 07:55 AM   #1
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Rafter alternatives


I am putting in a shed dormer. Current rafters are 2x6, span is 14 feet. Going from a 12/12 to a 6/12 pitch. I have no ridge now, the rafters are angle cut and meet each other at the peak. I am thinking about ordering I joists instead of dimensional lumber. What I am not sure of is if I can use an I joist without supporting it at the peak. If I install a ridge board where the dormer is going, can I use joist hangers to hang the I joists?

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Old 08-16-2011, 10:56 AM   #2
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Rafter alternatives


You will need ceiling joists unless the ridge is structural; http://cmfac.groups.et.byu.net/tharm...ng%20guide.pdf

Gary

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