Roof Joist Angle Thickness

Let s consider a basic gable wood roof framing design.

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. About o donnell metal deck. They are custom engineered to suit the design of each building. Once all of these inputs have been entered into the calculator you will see that the appropriate rafter width is 120 33 inches.

Bridging angle size equal leg angles table 2 6 1b lh series joists maximum joist spacing for horizontal bridging spans over 60 ft. It is measured from the horizontal wall line to the sloped rafter using the rise over run. Here the wall thickness is 240 57 inches. Continuing on from part 3.

Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. Span calculator for wood joists and rafters also available for the android os.

See rafter run to outer wall calculator below. Require bolted diagonal bridging section number 001 168 3 28 07 10 52 am page 5. K series joists range in depth from 10 to 30 and can span up to 60. For low pitch roofs building codes may require larger dimension rafters.

Ridge the upper edge where two roof slopes or decks meet. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. Includes result for hip valley factor slope factor and the roof slope in degrees. Here we have a wood framed gable roof.

Half building width minus 1 2 ridge thickness. Standard joist details 6 gen. Also available for the android os. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.

Roof pitch calculator results explained. 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. 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. These welded steel products are used to support a building s roof and floors.