Help with cathedral truss

[binkpear]

I struggle with creating cathedral ceiling trusses. I build my roof and locate it exactly where I want it. I then build a ceiling plane and locate that exactly where I want it. I then build the truss. As you can see in the attached plan, the low end of my eave wall builds correctly, but the high end eave portion of the truss does not. The hatched boxes represent the 9-1/2" deep wall that will be below the 9-1/2" seat of the truss. What am I doing wrong? Is there a way to not have to place ceiling planes, but just have the program auto generate the truss space based on wall inputs, heel height of truss (28"), etc? Thanks for your help!

Lot plan.plan

[robdyck]

2 hours ago, binkpear said:

Is there a way to not have to place ceiling planes, but just have the program auto generate the truss space based on wall inputs, heel height of truss (28"), etc?

Yes and No. Chief can generate a truss that is not correct, and then you could manually adjust the truss polyline. Your particular model raises more questions than I have time to address, however I suggest getting the framing reasonably close and then making manual adjustments.  Chief will almost never build top plate heights and vaulted ceiling trusses both correctly.

 

For this building, you could split the room to create 2 separate default ceiling heights to help drive wall framing...but then you have 2 rooms instead of one. So, it might make more sense to manually adjust the wall framing of either the low or the higher wall. Either way, it will help if the default ceiling elevation is either 84" or 125 1/2".

 

Also, it will help if all framing defaults and assembly defaults are exaclty correct to what is being built, and if the walls have both framing layers as 'Main Layers'.

 

[binkpear]

Thanks Robert. I changed the rough ceiling in the room specification to 125-1/2" and that sorted out the truss. I often make my defaults for the rough ceiling higher than I know I want them because then I don't have attic walls created where I don't have consistent ceiling hts.