Roof Joist Angle Thickness

A 14 angle gives a 3 12 slope 4 12 is an 18 2 angle and 6 12 a 26 6 angle.

Roof joist angle thickness.

Allow for ridge thickness when determining rafter run to outer wall. About o donnell metal deck. Here we have a wood framed gable roof. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

They are custom engineered to suit the design of each building. Also available for the android os. Ridge the upper edge where two roof slopes or decks meet. Once all of these inputs have been entered into the calculator you will see that the appropriate rafter width is 120 33 inches.

Standard joist details 6 gen. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. Continuing on from part 3. For low pitch roofs building codes may require larger dimension rafters.

K series joists range in depth from 10 to 30 and can span up to 60. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through. Require bolted diagonal bridging section number 001 168 3 28 07 10 52 am page 5. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.

For instance if your roof has a steep pitch you may be able to use 2 inch by 4 inch rafters but if your roof has a low pitch building code may require that you used 2 inch by 6 inch or 2 inch by 8 inch rafters. Span calculator for wood joists and rafters also available for the android os. It is measured from the horizontal wall line to the sloped rafter using the rise over run. Half building width minus 1 2 ridge thickness.

Includes result for hip valley factor slope factor and the roof slope in degrees. These welded steel products are used to support a building s roof and floors. Let s consider a basic gable wood roof framing design. Bridging angle size equal leg angles table 2 6 1b lh series joists maximum joist spacing for horizontal bridging spans over 60 ft.

Floor beam span tables of residential structural design we will now look at roof rafter and beam design. Here the wall thickness is 240 57 inches. Angle the angle of a roof is the same as the roof s slope except instead of being. Roof pitch calculator results explained.