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.
Tji roof rafters.
The applicability of this detail is based on the joist reaction at the support.
Technical bulletin tb 805 shows a detail for reinforcement of tji joists slope cut to match a rafter pitch.
This detail is intended to reinforce the tji j oist end and not to transfer thrust loads at the rafter heel.
Tji joists are lightweight and come in long lengths which makes them faster and easier to install than traditional framing and saves you both time and money.
The dimensional stability of tji joists help them resist warping twisting and shrinking that can lead to squeaky floors.
The tji rafter run is 18 feet.
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.
The second floor flat ceiling will tie into the tji at 12 feet hence the need for a vented assembly.