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Old 03-13-2011, 03:16 PM   #1
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Framing 1.5 story exterior walls.


Framing a small 1.5 story cabin. 16'x28' 2x6 walls on 16" centers. exterior walls are 14' tall. Cant decide which is the best way to frame the walls. Option one is to set a ledger into 14' 2x6 walls and set the 2x12 floor joist on the ledger and bolt to the 2x6 studs. Option two is to build a second floor and set it on the top plate of the lower floor. and then build a 4' knee wall on the seconf floor and set my rafters on that.

im in marion county florida

OPTION 1.

OPTION 2.

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Old 03-13-2011, 04:13 PM   #2
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Framing 1.5 story exterior walls.


I'm assuming the outside is going to be sheathed, if this is the case I would lean towards option 2. It seems like you would get better support for the second story having the joists bearing on top of the wall with a double top plate tying everything together. Then with the sheathing you can tie the kneewall into the bottom wall and rim joist.

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Old 03-13-2011, 04:39 PM   #3
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Framing 1.5 story exterior walls.


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I'm assuming the outside is going to be sheathed, if this is the case I would lean towards option 2. It seems like you would get better support for the second story having the joists bearing on top of the wall with a double top plate tying everything together. Then with the sheathing you can tie the kneewall into the bottom wall and rim joist.
outside will be sheathed with 5/8 ply and siding will be 5/8 cypress bevel siding.
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Old 03-13-2011, 06:38 PM   #4
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Framing 1.5 story exterior walls.


The rim joist around the second story floor joist seeing that its 28' foot and i cant get a 2x12 in that length there will have to be a seam. Do i just use a but joint? and not put a joist over the joint and to one side or do i position the joist over the joint?
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Old 03-13-2011, 08:25 PM   #5
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Framing 1.5 story exterior walls.


Just a butt joint on the rim board, not required at joist; http://publicecodes.citation.com/ico...002_par025.htm
However, FL requires stud to rafter and stud to stud above positive connection (think metal) due to high winds. Check your City/county web site for additional requirements.

Be aware with knee walls or balloon:http://www.unified-eng.com/ch/thrust.html

http://www.smandf.com/25-Conventiona...&Solutions.pdf

Your high wind location may require stronger than 90mph sheathing; http://www.awc.org/pdf/WFCM_90-B-Guide.pdf
Your B.D. will have all the requirements including braced wall panels; http://publicecodes.citation.com/ico...002_par031.htm

Gary
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Old 03-13-2011, 10:45 PM   #6
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Framing 1.5 story exterior walls.


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Just a butt joint on the rim board, not required at joist; http://publicecodes.citation.com/ico...002_par025.htm
However, FL requires stud to rafter and stud to stud above positive connection (think metal) due to high winds. Check your City/county web site for additional requirements.

Be aware with knee walls or balloon:http://www.unified-eng.com/ch/thrust.html

http://www.smandf.com/25-Conventiona...&Solutions.pdf

Your high wind location may require stronger than 90mph sheathing; http://www.awc.org/pdf/WFCM_90-B-Guide.pdf
Your B.D. will have all the requirements including braced wall panels; http://publicecodes.citation.com/ico...002_par031.htm

Gary
Thank you for the info. Thrust looks like it will be the biggest issue to overcome.
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Old 03-14-2011, 12:39 AM   #7
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Framing 1.5 story exterior walls.


Have decided to use a ridge beam instead of a ridge board this should fix my thrust issue. 5.25"x16" glue lam beam 890 installed.

Now i need to figure out a header for the gable end do to a rather large window i would like to place there.
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Old 03-14-2011, 09:00 PM   #8
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Framing 1.5 story exterior walls.


Are the gable rafters continuous or pieced above? If full length, header would carry gable framing- no roof load; http://resourcecenter.pnl.gov/cocoon...er/article/125

http://www2.iccsafe.org/states/Flori...20Material.pdf

Gary

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