Interior Wall Framing On Roof Trusses

Elements that make a roof truss.

Interior wall framing on roof trusses.

The trusses are all the same. When building a new house the framing contractor should secure the interior partitions to the trusses with truss clips. Because the blocks are attached to the wall this will keep the joint from cracking. House built in early 70s single story on slab.

Trusses manufactured with dry lumber do not warp twist creating a framing system that is easy to properly place and sheath. The exception according to the 2015 irc is 2 6 walls supporting two full floors plus a roof assembly above or 2 4 walls supporting one floor plus a roof assembly above zip sheathing can typically be installed either vertically or horizontally. The edge of the drywall is nailed screwed to the blocks not the truss. In addition proper drywall installation is necessary to prevent cracking.

If you don t know how to do that ask your truss supplier for info. The next set of nails screws must be about 8 out and attached to the truss. As brad pointed out make allowances for letting the drywall float at the interior partitions. We usually build on the exterior walls set the trusses and do all of the chord blocking and truss bracing before building the interior walls since it is easier to roll a scaffold around on an empty open floor.

Block between trusses with 2x6 s which overhang each side of the interior wall. Trusses and interior walls we have a big truss job coming up on a new house we are framing. By big i mean big. The trusses span 30 ft and are a w truss system built of 2x4.

Trusses don t bear on interior walls unless specifically designed to. By eliminating interior bearing walls trusses also save the cost of interior foundation walls interior partition top plates and headers. 711 trusses with 248 different truss types out here in california we are required to use the simpson stc or dtc truss clips and are specifically forbidden to toe nail non bearing walls to the trusses. I d never use a 1x4 for a top plate you need more surface showing for attaching drywall on the walls.

This wall runs perpendicular to the truss system just off center. Structurally in most cases exterior wall framing can easily be 24 in. It appears the best solution is to build interior walls below the ceiling framing line then use a simpson strongtie stc roof truss clip which keeps the trusses in alignment while allowing for vertical movement of the roof truss.