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TJI's vs. Floor Truss

scdesigner's picture

I'm designing a house for a client and I'm debating on using TJI's or floor trusses. It's a basement house and the A/C loads will be small enough I feel like the duct lines can be run through either floor system...a little more work for TJI's cutting holes etc. but I wonder if it will be less prone to squeeks. I was at a seminar once and an architect complained about trusses and squeeks. The subfloor will be glued down with either system.

Also, it will be a LEED house and there is a point for trusses and none for TJI's and it makes me wonder if one is "greener" than the other. I know EarthCraft gives you credit for either system.

Any experience out there that says to use one over the other?

Thanks....

(post #85072, reply #1 of 13)

How you gonna cut ANYTHING out of a TJI w/out having an array of problems???  Voided warranty, failed inspect., structural defect, etc.


I don't like 'em much anyway.  Just a me thing, but I use the floor trusses given a choice.


Boss Hog???


Hey sc, how about that profile???



The best reward for a job well done is the opportunity to do another.


Edited 12/29/2008 9:45 pm ET by davidhawks

The best reward for a job well done is the opportunity to do another.

(post #85072, reply #2 of 13)

You can cut a lot out of a TJI without having any problems... just follow the guidelines given by the manufacturer. 


 


 

(post #85072, reply #3 of 13)

Really?  I haven't used 'em in 10 years or so, and they were always off limits to modifications back then.


I stand corrected.


Thanks


The best reward for a job well done is the opportunity to do another.

The best reward for a job well done is the opportunity to do another.

(post #85072, reply #4 of 13)

Scroll down to page 11, you can make allowable every day with I-joist.


http://www.ilevel.com/literature/TJ-4001.pdf


Joe Carola
Joe Carola

(post #85072, reply #6 of 13)

Thanks Joe, that's why I love this place.  Learn something new just about every time I log on.

The best reward for a job well done is the opportunity to do another.

The best reward for a job well done is the opportunity to do another.

(post #85072, reply #5 of 13)

Yes... you can cut quite a bit out of I joists and still be OK per the mfg recommendations.  See attached pic.  (not my job) Not saying I agree with this... but it appears that the I-joists were ordered with the cutouts. 


Regarding squeaks and trusses, most problems I've had are due to 24" OC trusses causing deflection in the floor sheathing that then caused squeaks.  Stay away from 24" OC.  I also had one particularly nasty one that was due to a 2x6 strong back not being nailed properly.  That one required pulling back the carpet, cutting a hole in the floor, screws in the offending brace and then putting it all back together again...


I don't know about the LEEDS stuff - need to nearn that.

Matt

(post #85072, reply #7 of 13)

Just doesn't seem right does it???

The best reward for a job well done is the opportunity to do another.

The best reward for a job well done is the opportunity to do another.

(post #85072, reply #8 of 13)

You can get squeaks with either system if not installed correctly. Study the details given with the package and then do it right the first time. Look for tips too. Like with TJIs set into a hanger, seat them in a dab of glue so they don't rub the metal and squeak.

 

 


Welcome to the
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(post #85072, reply #9 of 13)

I like to have glue in the "saddle" of any floor joist hanger, be it I-joist, floor truss, or 2x10.

Matt

(post #85072, reply #10 of 13)

I like floor trusses more, but as said holes in I-joist are fine as long as you follow the charts

NAIL  IT !!!

NAIL  IT !!!

(post #85072, reply #11 of 13)

I always used Tji's........one guy can set a whole floor in a short amount of time by himself........floor trusses, I thought were only used for wide spans or extra heavy loads.

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(post #85072, reply #12 of 13)

I have done a lot of framing over the years, and have never used floor trusses.  Now, TJI's, that is a different story.  I would build with them in a heartbeat.


My boss, built his house with 12" tji instead of 9.5 and loves the stiffness of the floor.  In otherwords, designed for the 9.5 and substituted the 12".  He had to refigure a little, for the 12 but not much.

(post #85072, reply #13 of 13)

True dat. My main floor is about 28x36. I set all the TJIs and the 3/4" T&G glued and nailed in a sweet six hour day alone.

But when you get longer spans ( I had a midspan beam) and a bunch of utilities to run through, the open web floor trusses are the way to go to ease the swear factor.

 

 


Welcome to the
Taunton University of
Knowledge FHB Campus at Breaktime.
 where ...
Excellence is its own reward!

 

 

Oh Well,

We did the best we could...