Truss Will Not Span Cathedral Ceiling Plane

[DRyeHD]

I've created a cathedral ceiling over a living room but cannot get the trusses to span across all of it.  Per the attachment, they begin properly at the back of the living room, cross the peak of the cathedral ceiling, then stop at a roof pitch change.  I've tried rejoining the roof planes and ceiling planes but am not able to figure out why the truss stops at the roof pitch change.  My truss top chord is 7 1/8" for insulation purposes. Any ideas or suggestions?  I will send the plan file if needed.

[DRyeHD]

Here is the file.

Karstens.plan

[DRyeHD]

As you show, I tried moving the front ceiling plane down a couple of inches.  I need the bottom of each plane to sit on the 8 foot top plate and the ceiling plane peak to be in the middle of the living room.  I've also tried dropping the slope from 6:12 to 5:12 with no success.  I see where the problem lies and will create the space somehow.

 

Thank you for taking a look.

[javatom]

I would check with a truss manufacturer to see if they can even build this.

[DRyeHD]

javatom,

You are right about checking.

 

The main (6:12) roof bears on the front and back walls. As Eric mentions, I should be able to gain some depth somehow.  I will post what I come up with.

[DRyeHD]

I was able to get a 4 1/2:12 cathedral ceiling plane to allow the truss build (13'-6" at the ceiling peak).  Now to see if the truss maker can do it.  Thanks Eric and javatom!

[madcowscarnival]

Just an aside, I don't think they'll be able to create that.  There's a significant moment at that interior peak.  I suspect they'll ask to build a girder truss at the interior peak then hang truncated trusses on each side.

[Chrisb222]

21 hours ago, DRyeHD said:

 

Yeah, if you get a truss company to agree to build that, I don't think I would buy trusses from them.

[DRyeHD]

I don't think they will be able to either.  I submitted it to them yesterday.  We will see if madcowscarnival is on the right track.