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Old 08-23-2008, 05:18 AM   #1
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"Sistering" wood together


What is the proper way to sister a 2x10 to a 4x10 rafter? Length is 20' Do I use nails or bolts? What is the nailing or bolting pattern?

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Old 08-23-2008, 06:18 AM   #2
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"Sistering" wood together


Did you mean sandwich the two?

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Old 08-23-2008, 07:56 AM   #3
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"Sistering" wood together


Bolting is not necessary, and won't really gain you anything with just two plies of wood. You can use 16d nails. I'd do two (or even three) horizontal rows of nails at about 12" apart, staggered, through the 2x10 into the 4x10. Construction adhesive (like liquid nails or subfloor adhesive) would be a good idea.
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