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Tail Bearing Trusses

Tail Bearing Trusses

Tail Bearing Trusses

(OP)
What is the typical way to frame the gable ends when using tail bearing trusses? I'm assuming they should be treated similar to scissor trusses where the gable walls are balloon framed up to the bottom chord of the common trusses.

See SketchUp model here:

https://3dwarehouse.sketchup.com/model.html?id=u70...

I'm not really familiar with this truss type so what to do at this the gable ends has me a little stumped. Theoretically one could forego the gable end trusses altogether and just balloon frame all the way to the roof diaphragm but I am trying to find out the most typical way a truss plant would deal with this situation.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Tail Bearing Trusses

I would typically build a gable truss without the extended top chord.

RE: Tail Bearing Trusses

(OP)
I am currently investigating the best method to construct the gable end wall and truss with a tail bearing truss. Show below are 3 different possible configurations:


1.) Structural Outlookers (Vertical)


2.) Non-Structural Outlookers (Horizontal)


3.) Structural Outlookers (Horizontal)

This is just one possible method of framing the gable end wall into the gable truss with a 2x4 outlooker. Option 3 shown above is somewhat of a question, not sure how that heel joint would come together.

View the model here to analyze the different configurations:

https://3dwarehouse.sketchup.com/model.html?id=u75c42456-c8e5-4002-bc93-779860f8dc61

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Tail Bearing Trusses

(OP)
The key thing to note with these examples is that I am keeping the bottom chord of the gable end truss inline with the bottom chords of the common trusses. However, framing the gable end wall with partial sloping top plates seems like it would be making things more complicated than simply balloon framing the entire wall up to the roof diaphragm.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Tail Bearing Trusses

(OP)
Alternatively one could balloon frame the wall at the gable ends and attach a ledger for the ceiling:



View model here:

https://3dwarehouse.sketchup.com/model.html?id=ub1...

In my opinion a partially sloping wall gets complicated to frame. From an engineering standpoint the balloon framed wall is also the strongest option.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Tail Bearing Trusses

I'm partial to extending the wall up.

RE: Tail Bearing Trusses

I've been out in the field a lot. Balloon framed end walls are rare in this part of the country. They don't do it unless they have to.

But - Things vary a lot from one region to the next. It may be much more common in other parts of the country.

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