I Joist Roof Rafters

If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters.

I joist roof rafters. In traditional timber they are nominally 2 inches thick and typically 8 to 10 inches wide. Tji joists are lightweight and come in long lengths which makes them faster and easier to install than traditional framing and saves you both. Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability. Rafters are the building components that run diagonally from the wall plate to the apex of a roof structure.

In addition we carry a wide selection of lumber and boards. Rafters form the foundation for attachment of the roof boards onto which the final roof covering is fixed. The dimensional stability of tji joists help them resist warping twisting and shrinking that can lead to squeaky floors. A fire spreading into the attic space or into the space between the i joist rafters the roof sheathing and the ceiling can cause the thin wood cross sections in the manufactured lumber to ignite.

Engineered wood products ewp span and size charts for bci joists. 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. They are ideal for long spans including continuous spans over intermediate supports. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.

The roof rafters provide integral structural support to the roof. I joists are used extensively in residential floor and roof framing. Conventional framing the first thing to understand is how a roof framed with wood i joists differs structurally from a traditional stick framed roof. Corbett grace their parents and even their kids are learning a lot about the many ways a few right many wrong to build a high performance home.

Some of those options include laminated veneer and strand lumbers i joist and rim boards.