Reason 2 Truss . . . Would U?

Originally Posted by UpNorth

For you cut-it-on-site-from-sawn-lumber types, here is the same little roof scheme done all in sticks, with sizing of members all figured for our loadings.

The four-pair end (as seen in plan) is unchanged, as it was sticks before. The rest was all trusses in the earlier scheme, and is all sticks now. As you can see, the "greatroom" end that had the 25'4" scissors, and the dormer with its funky scissors and valley sets, now requires a second "roof" be framed underneath to make up the vaulted ceilings.

The ridge over the big part is a two-ply 1.75x14. All other ridges and valleys are single LVLs at 1.75x11.875.

Rafters are 2x10 if spanning full. The dormer rafters are 2x8. All are 24 on center, and the design is conservative, figuring all the snow loading and drift factors. Sheathing is 5/8 OSB.

Originally Posted by UpNorth

Well, thanks, Tim! It is pretty clear now that the cost premium for trusses over sticks will exceed the labor premium for a frame that is all-sticks.

To show this better, I have turned on the layers for the walls and floors, and you can see in this pic how far up that roof is off the floor, at the "greatroom" end of this little vacation home. That man on the main floor has a 2x4x8 standing next to him.

I also threw in a Lull telehandler, a piece of equipment not available to any of the very few pro framing crews we have up here in the north country. This roof will have to be erected using scaffolding and planking, and a lot of plain old manpower.

Originally Posted by catspaw

gene,
looks good. you could just frame with 2x12's and use r-38c insulation that would leave a 1" air space for ventilation. then you could do away with the scissor system altogether. either way you still have to have a post under each end of the ridge beam(s) and chase the load path to the foundation with properly sized point load footings,but you knew that!

Originally Posted by UpNorth

Well, thanks, Tim! It is pretty clear now that the cost premium for trusses over sticks will exceed the labor premium for a frame that is all-sticks.

To show this better, I have turned on the layers for the walls and floors, and you can see in this pic how far up that roof is off the floor, at the "greatroom" end of this little vacation home. That man on the main floor has a 2x4x8 standing next to him.

I also threw in a Lull telehandler, a piece of equipment not available to any of the very few pro framing crews we have up here in the north country. This roof will have to be erected using scaffolding and planking, and a lot of plain old manpower.