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Old 11-23-2015, 08:19 PM   #1
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Can someone tell me what this is?


Are these joists? Don't look like normal joists to me but yet they seem to have subflooring attached to them.
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Old 11-23-2015, 09:25 PM   #2
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Can someone tell me what this is?


Engineered trusses.

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Old 11-23-2015, 09:53 PM   #3
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Can someone tell me what this is?


They have been the norm for over 30 years. That is actually the roof most likely, not another floor.
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Old 11-23-2015, 10:06 PM   #4
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Can someone tell me what this is?


That's the top of the first floor bottom of the second
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Old 11-23-2015, 11:10 PM   #5
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Can someone tell me what this is?


They are usually pressed together with gusset plates
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Old 11-23-2015, 11:21 PM   #6
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Can someone tell me what this is?


Yep....engineered joists. I looked into using them on my addition....

From what I found....very stiff....but they take up more vertical space.

One of their big advantages....you have lots of room to run venting through. Something that is difficult with traditional sawn lumber joists.
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Old 11-23-2015, 11:35 PM   #7
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Can someone tell me what this is?


Another advantage to those are for spans. You can get a large clear span with them. Depending on the length and wieght calculations they often times come cambered as well.
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Old 11-24-2015, 01:53 AM   #8
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Can someone tell me what this is?


Quote:
Originally Posted by ddawg16 View Post
Yep....engineered joists. I looked into using them on my addition. From what I found....very stiff....but they take up more vertical space. One of their big advantages....you have lots of room to run venting through. Something that is difficult with traditional sawn lumber joists.
It makes it a lot easier to place everything up inside the truss, instead of having to drop the ceiling lower to run Cold Air Returns, etc. You have to compensate for the difference in height of course, when using them.
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Old 11-24-2015, 08:03 PM   #9
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Can someone tell me what this is?


Quote:
Originally Posted by simeltzer View Post
They are usually pressed together with gusset plates
Look closer and you'll see the gusset spike plates. Ron
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Old 11-24-2015, 09:55 PM   #10
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Can someone tell me what this is?


My father speced these back in '77 when he built his house. I always said if I ever built a house I would use them, no question about it. No columns in the basement no load bearing walls in the whole house. And as has been said the mechanical's are a snap. Cost a little more, but there is some labor savings and since you save on beams and columns it almost washes out price wise. Also finishing the basement was easy, since all the mechanical's fit up in there, no drop ceilings you can do "normal" drywall much easier.
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Old 11-25-2015, 06:35 AM   #11
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Can someone tell me what this is?


I find slight humor in the fact that in the picture at top left it says joist right on the wood...
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Old 11-25-2015, 07:13 AM   #12
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Can someone tell me what this is?


Quote:
Originally Posted by ront02769 View Post
Look closer and you'll see the gusset spike plates. Ron
I see finger joints.
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Old 11-25-2015, 11:08 AM   #13
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Can someone tell me what this is?


Always called them bar joists.
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Old 11-26-2015, 12:22 PM   #14
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Can someone tell me what this is?


They're called "open web trusses". Very common, strong, easier to run plumbing and electrical thought, somewhat easy to tie an exterior deck into, etc.
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Old 11-26-2015, 12:24 PM   #15
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Can someone tell me what this is?


Quote:
Originally Posted by gregzoll View Post
They have been the norm for over 30 years. That is actually the roof most likely, not another floor.
The fact that it's OSB sheeted on top says it's a floor.

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