Tji Roof Rafters

By the end of the class about 90 minutes they had two thirds of the tji roof rafters cut and ready for installation.

Tji roof rafters.

The next morning the students set up three stations to cut the different size rafters. 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. One 8d face nail at each side at bearing. 1b apa rim board one 8d common or box nail at top and bottom flange attach apa rim board to top plate using 8d common or box toenails 6 o c.

It s 1 1 2 stories and the second floor will have a flat vented insulated ceiling likely cellulose blown to r60 under the 6 12 pitch. Engineered wood products ewp span and size charts for bci joists. I d like to fasten a layer of osb under the the 11 7 8 tji rafter flanges. The 12 12 will be mostly open to below.

First they made i joist cross cutting jigs from osb scraps and made a few practice cuts. As roof design gets more complex with longer rafters and multiple peaks you can be confident that timberstrand lsl has the strength and stability to meet your needs and accommodate creativity. Conventional framing the first thing to understand is how a roof framed with wood i joists differs structurally from a traditional stick framed roof. For concentrated vertical load transfer capacity see 1d.

Design of a bending member such as joist header or rafter. The rafters to the left of the lvl extend the roof above a larger room below on the first floor. The gable roof has two different pitches the front is a 12 12 and the rear is a 6 12. Tj 9001 installation guide for floor and roof framing with tji 110 210 230 360 and 560 joists.

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. These materials and construction methods make a strong and straight roof under normal conditions.