Balloon Framed Wall Detail
Balloon Framed Wall Detail
(OP)
Has anyone ever seen a detail like this before or done one? I am reviewing a design and don't know if this is a legitimate connection without seeing some sort of verification.
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Balloon Framed Wall Detail
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Balloon Framed Wall DetailBalloon Framed Wall Detail(OP)
Has anyone ever seen a detail like this before or done one? I am reviewing a design and don't know if this is a legitimate connection without seeing some sort of verification.
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RE: Balloon Framed Wall Detail
Thanks
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
It's located on a gable end wall with a scissor trussed roof. Unfortunately the architect put a stairway to the second floor at this location so it has to be balloon framed. It's 26ft to the bottom chord of the peak of the scissor truss. I'm recommending 1-1/2"x7-1/4" LSL studs for it. Timber strand has tables for walls like this.
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
Not only for structural reasons....you can't build a wall as the have shown and get it straight and flat. There will be a bulge/bow to the wall almost every time and it will make the finishes very difficult.
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
Full height studs ONLY, regardless what they are!
Quite frankly, this looks like something an Architect might do rather than a structural engineer.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
http://www.strongtie.com/products/connectors/cs-cm...
I agree with shobroco, not balloon framed but if the intermediate double plates can do the job then it might be good to go.
RE: Balloon Framed Wall Detail
Regardless, I won't approve it in my remove and am sticking to the LSL's. I hadn't thought about putting additional 2x's along side the joint. But that seams like more work than it is worth and there is always the construction error aspect and nails loosening over time. I had a post a while back about design concerns in this are where I'm marketing at, and this is another example of those concerns. I talked with the contractor on the job about this detail because I know him personally and he said he has done a few like this. Pretty concerning.
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
The straps could work satisfactorily if they could take compression as well as tension, in effect making the studs continuous through the double wall plate.
BA
RE: Balloon Framed Wall Detail
If I was the contractor and I would refuse to build the wall as it is shown.
Quite frankly, that detail is just plain rookie.
RE: Balloon Framed Wall Detail
Full height studs only! That's one of the criteria for balloon framing. This looks like a bastardization of platform framing.
For the length (height) you'll need engineered wood (LVL/LSL). Tough to get a 26-foot stud, particularly a straight one.
RE: Balloon Framed Wall Detail
We actually had 24' studs and they weren't too bad. But, the wall was so flimsy we had to go back and build flitch beams in place every so often. This really sucked because we had to account for wiring so the flitch plates had to be drilled ahead of time. The whole thing was a disaster.
RE: Balloon Framed Wall Detail
The straps at mid-height are to transfer the shear from wind going the other direction around the stairwell...it was left out and was a little more complicated than the guy thought.
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
BA
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
RE: Balloon Framed Wall Detail
Reason for the straps:
Where the stairs come up, there is about 6'-4" of floor diaphragm to the wall for wind going the other direction. He has to transfer about 3000lb into the wall that I show with glulams with very little floor sheathing available (5'-0" wide x 6'-4" deep area to transfer through). He missed some special detailing at that location. The CS16 straps carry the tension load from the floor diaphragm into the wall. I showed them going full length so it would engage the entire wall. He still has some work to do on the detailing to transfer the load as it is decently complicated and was overlooked. Might be overkill to go full length, but CS16 straps aren't that expensive in the overall project, plus I would be able to sleep at night knowing there aren't any questions at that location.
RE: Balloon Framed Wall Detail
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Balloon Framed Wall Detail
My two cents...
RE: Balloon Framed Wall Detail
I have in my red-line notes that full height LSL's are an option in lieu of the Glulam detail. I just think the Glulam detail with a double 2x8 (went with 2x8s to keep uniformity for the wall framing as the wall width is now governed by the glulam width) will be a lot less headache on the contractor for a few reasons: 1) LSL's are a pain to nail into, 2) it's fitting (2)-sticks of lumber full height instead of a bunch, 3) once the glulams are in place, the framers can frame just as usual and not have to worry so much about a very flemsy tall wall, 4) I don't know how much a stick of LSL costs these days but traditionally it has been much more expensive than DF.
RE: Balloon Framed Wall Detail
1: Structural integrity...and
2: Ease of construction...and
3: The home owners wallet...
Number 1 is a given. I thought numbers 2 and 3 were lost years ago in a plague of self advancement.
Kudos