Open Joist Open Web Floor Truss

http://www.openjoist.com
http://www.ufpi.com/email/signup.htm
Speed of installation and superior strength have made OPEN JOIST® a preferred choice for building designs that require longer joist spans or wider joist spacing and reduced framing costs. Open Joist features an open-web design for fast and easy installation of mechanical systems. Open Joist is a versatile, open-web alternative to I-joists, dimension lumber and fixed-length, metal-plated trusses.

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[sameprecision]

Do you build these flat or is there a crown built into them? I can see that they do have an "up".

[UFPI01]

There is a crown built in Open Joist with the exception of 148 3/8 through 162 1/2 because they're specific to Manufactured Housing. Open Joist trusses are flipped so they have a web/vertical located directly above the carrier to provide shipping support. This crown will also help in the ability of the product to have a memory when heavy loads are put on the joists during construction such as shingles or bundles of dry wall. The product will not be damaged as easily as a plated floor truss.

[Frankyyourpimp]

lets see how the "glue" holds up when these things catch fire

[UFPI01]

As stated below, HexiTherm is the brand name for Hexion's family of adhesive technologies designed to offer the ultimate in heat performance.

[1972sydney]

Is Open Joist used mainly for residential and is it priced higher?

[UFPI01]

Open Joist's superior strength and highly competitive cost make it a natural choice for many commercial construction projects. The product's strength/cost ratio makes it an attractive floor-framing system for almost any building project.Open Joist typically offers a cost savings of 20% to 30% when compared to metal-plated floor trusses. Comparing foot-for-foot cost, Open Joist is directly competitive with wooden I-Joists.

[1crazyfocker]

@Frankyyourpimp they glue will hold a lot longer then the thin metal gussets most companies use, since those gussets only "grab" the wood by 1/4" to 3/8" during a fire they expand and pull free, however a tight long glued finger joint should last a lot longer then a metal gusset. when i build trusses we always used glue with wood gussets and 6p nails, so we had the best of both, if you ask me, the best way to go (but most costly) would be a glued tenon with metal gussets and nails. overkill

[lrd9999]

@donsjuand Well, if you can be 100% sure that nothing in you house will start a fire, there's no reason to worry about things like this. I don't barbecue pigs in my bathtub or have a meth lab in my closet, but my house has wiring, appliances and might get struck by lightning. It there's a way to fireproof these to make them as safe at 2X12s, and still save money, fine; otherwise, I'd rather live with a squeak here and there knowing I won't be in the basement by the time I hear the smoke alarm.

[Mr8otter]

Failure in a home fire is faster with these. Remember that a failure in any web member will cause failure in the whole system.

[prreynolds]

@Frankyyourpimp 

[prreynolds]

@Frankyyourpimp

I'm with you brother. We use these types of videos to help explain to our fire science students why they should pay particular attention to new structures that are going up in their district. I tell them - "If it went up real fast...it is going to come down real fast in a fire". BRAVO to those FDs that are tagging structures with lightweight construction placards

[donsjuand]

@Frankyyourpimp If your joists are on fire, you have bigger things to worry about than glue. Like what led them to catch fire in the first place...

[wingmanalive]

@Frankyyourpimp Trusses are used for many reasons. They are subjected to the same principals in design as stick framing when exposed to fire/water damage and most if not all new home construction GM's choose them because of their benefits. They are lighter, stronger and allow such things as HVAC ducts to pass inside the floor system. Plus they are an engineered system, something stick framing fails. They are designed by qualified designers and approved by registered engineers.

[d1incharge]

I remember when the lumber yard salseman showed up to the job, and I had to mention that the finger jointed studs with the WONDER GLUE tm on them were falling apart at the fingerjoints, he said "that is the strongest part of the stud""that is what the manufacturer told us" I dropped one from chest high in front of him and it broke into 4 pcs, all at the well glued fingerjoint! That was just studs, you cant take your floor truss and shove em! All floor trusses, just another step up, 2 laps siding