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Small Cabin Forum / Member's Projects and Photos / 12x20 Cabin Build and THANKS!!!!
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Brettny
Member
# Posted: 15 Oct 2020 13:09
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In this situation with a 12' wide loft I dont think it really matters if you add another stud under the loft floor joist or screw directly to the side of the wall stud. The beat way would be to put the loft floor joist right ontop of the wall top plate but you take away head room in the loft.

Why cant you properly insulate?

Brettny
Member
# Posted: 15 Oct 2020 13:12
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Also I have a 20yr old T1 11 garage that has a trim board at 8' even with Z flashing that trim board has caused the siding to completely rot behind it. It's been like for for at least 9yrs.

I would remove that trim board above the front porch. In one pic I alreaty see it turning gray from water. Is there a reason you didnt put larger gable end overhangs?

DaveBell
Member
# Posted: 15 Oct 2020 13:35
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Quoting: Nate R
I'm saying hanging the loft joists off a standard 2x stud, not over a jack stud (or nothced 4x)....


Show us the math.
Dead loads, live loads, etc.

DaveBell
Member
# Posted: 15 Oct 2020 13:36
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Quoting: Brettny
The best way would be to put the loft floor joist right on top of the wall top plate


Show us the math.

Brettny
Member
# Posted: 15 Oct 2020 15:27
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What's to show? Your putting the floor joist ontop of the load bearing wall. Fasteners are less important this way.

Nate R
Member
# Posted: 15 Oct 2020 19:24
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Both me and Willie were just trying to understand what your'e saying is the "right way..." and I'm saying is the alternative even wrong in this case?

So, 12 foot wide building. One side is taking 6 feet of the joist load, by 2 feet (24 oc.) So each joist end is handling 12 SF. For a sleeping area, what's the live load max, 30 PSF? Dead is what? 10? 15? We're talking max of 540 lbs on that point at 15 lbs dead, 30 lbs live.

If it's on top of a stud, or notched into it, worst case, you need a 1.6 square inch area for bearing.
http://sprucepinefir.us/wp-content/uploads/2017/03/Base-Design-Values-for-SPFs-and-SP F.pdf

You could but a 1/2" thick notch in the stud to catch the joist, and use 2-3 of the simpson SDS screws to hold it there. You could probably not even notch and just bolt the joist to the side of the stud with those screws.

https://p.widencdn.net/r5ahu1/C-F-2019TECHSUP-p44and51and79and114and129.pdf2

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