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Old 02-22-2011, 05:08 PM   #16
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HELP reinforce a cracked rafter


I plan to sister the splitting 2x6 rafter with another 2x6 - the entire length of the rafter from joining point to garage wall. Is that ok or will plywood be better?

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Old 02-22-2011, 05:47 PM   #17
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HELP reinforce a cracked rafter


In the first photo is the rafter tie really sagging that much, or is that lens distortion?
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Old 02-22-2011, 06:06 PM   #18
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HELP reinforce a cracked rafter


Should I drive the screws slanted at a certain angle, or just straight 90 degrees into the wood?
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Old 02-22-2011, 06:59 PM   #19
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HELP reinforce a cracked rafter


Quote:
Originally Posted by Wolfen View Post
Should I drive the screws slanted at a certain angle, or just straight 90 degrees into the wood?
the main thing is to get the two pieces tight together. Then try to screw in as straight as you can. If you can't go in straight, switch to a slightly longer screw
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Old 02-22-2011, 07:52 PM   #20
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HELP reinforce a cracked rafter


Thanks mrgins - I'm getting closer.. Is my decision to sister the full length of rafter ok (same exact length and dimensions, ie 2x6) or should I just cut maybe 3 or 4 feet length? Just to cover enough the splitting part..
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Old 02-22-2011, 10:02 PM   #21
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HELP reinforce a cracked rafter


cant you just sister some plywood to each piece to reinforce it? nevermind thats what other people said too
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Old 02-23-2011, 11:56 AM   #22
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HELP reinforce a cracked rafter


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Originally Posted by federer View Post
cant you just sister some plywood to each piece to reinforce it? nevermind thats what other people said too
That too I'd go with a 3/4" strip of cdx, glued and screwed, with shorter screws obviously
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Old 02-23-2011, 12:05 PM   #23
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HELP reinforce a cracked rafter


Thanks for all your suggestions, I'm very pleased. I'm gonna be busy this weekend with all these new knowledge ;-)

My action plan: I will first glue the split wood together and drive a 4" screw diagonally from the bottom, 1 screw every six inches apart. That should help the glue keep the split wood stick together better.

As to the sister, I'm torn between using an 11 ft 2x6 to match the entire lengh of the troubled rafter, or just use a 4ft plywood on one side. Care to provide more info on why one is a smarter choice than the other, or does it even matter?

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