Conventional framing the first thing to understand is how a roof framed with wood i joists differs structurally from a traditional stick framed roof.
Tji roof rafters.
The dimensional stability of tji joists help them resist warping twisting and shrinking that can lead to squeaky floors.
In a typical roof framed with dimension lumber the rafters rest on the exterior wall top plate at the lower end and bear against a ridge board at the top.
The second floor flat ceiling will tie into the tji at 12 feet hence the need for a vented assembly.
The tji rafter run is 18 feet.
One more important detail.
This detail is intended to reinforce the tji j oist end and not to transfer thrust loads at the rafter heel.
Engineered to provide strength and consistency ilevel trus joist tji joists are a key part of our silent floor system.
Tji joists revolutionized the way you build floors trus joist developed wooden i joists nearly 40 years ago and since then we ve continually improved their quality and made them easier to work with.