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Rafter To TJI Connection

 
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Old 07-20-2014, 07:52 AM   #21
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Re: Rafter To TJI Connection


All the I joist companies we deal with will engineer their products for specific situations. In most cases, rim board negates the need for squash blocks.

I prefer using a bearing plate, but wouldn't say it's necessary, especially when using some form of metal connector.
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Old 07-20-2014, 07:55 AM   #22
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Re: Rafter To TJI Connection


Quote:
Originally Posted by loneframer View Post
Just did a floor/roof detail like this.

Frame as a floor, using rim board. Deck as a floor to tie everything together. Install a bearing plate of 2x4 or 2x6 and birdsmouth the rafter. Wall sheathing should carry across the rim board and tie to the bearing plate to unify the structure. Use a hurricane clip at every rafter to resist uplift. Install clips to exterior to catch full meat of rafter and tie into the sheathed structure.
That is exactly how I did it for this project I framed over the winter:



It's a Green building so I installed a rim (sub fascia?) to the ends of the rafters. We installed false rafter tails after nailbase insulation. (My buddy that I built this for is featured on this months issue of JLC).
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Old 07-22-2014, 08:14 PM   #23
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Re: Rafter To TJI Connection


Ever think about getting attic trusses?

Without seeing a plan I can't understand completely. If it's a straight gable to gable roof I think attic trusses with a microlam bottom cord would be less expensive and faster than building the floor, sheeting, and cutting the roof. Lots of variables though.

I did a detached garage a couple of years ago that we changed from a huge ridge beam and rafters to trusses. It saved the homeowner about 3k. He was pretty stoked about that.
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Old 07-22-2014, 11:52 PM   #24
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Re: Rafter To TJI Connection


Quote:
Originally Posted by Rio
LVL or Microllam rim.............
That's just plain unnecessary.

I actually liked the method using the top mount hangers the best.
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Old 07-23-2014, 12:32 AM   #25
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Re: Rafter To TJI Connection


Quote:
Originally Posted by kiteman View Post
That's just plain unnecessary.

I actually liked the method using the top mount hangers the best.
One shouldn't mix sawn lumber with engineered lumber in one plane. the rule is engineered lumber to engineered lumber or sawn to sawn. If one uses a sawn lumber rim with TJI's one is asking for problems. Look at the catalogs.
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Old 07-23-2014, 12:45 AM   #26
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Re: Rafter To TJI Connection


Quote:
Originally Posted by Rio
One shouldn't mix sawn lumber with engineered lumber in one plane. the rule is engineered lumber to engineered lumber or sawn to sawn. If one uses a sawn lumber rim with TJI's one is asking for problems. Look at the catalogs.
I don't think anyone is advocating using sawn lumber for rim. I think we're talking about engineered rim board.
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Old 07-23-2014, 06:20 AM   #27
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Re: Rafter To TJI Connection


Quote:
Originally Posted by kiteman View Post
I don't think anyone is advocating using sawn lumber for rim. I think we're talking about engineered rim board.
That is correct.

Regarding using trusses: I think it's all what you're used to. I was told the material cost would be a lot more for the trusses( I don't care as much about labor time), I have a set of stairs going up in a particular spot, and my 'help' situation will be sporadic. I could of had it all spec'd out for trusses but I didn't want to bother.

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