Roof Joist Angle Thickness

Once all of these inputs have been entered into the calculator you will see that the appropriate rafter width is 120 33 inches.

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. Here the wall thickness is 240 57 inches. Ridge the upper edge where two roof slopes or decks meet. See rafter run to outer wall calculator below.

K series joists range in depth from 10 to 30 and can span up to 60. Roof pitch calculator results explained. Includes result for hip valley factor slope factor and the roof slope in degrees. Angle the angle of a roof is the same as the roof s slope except instead of being.

Span calculator for wood joists and rafters also available for the android os. For low pitch roofs building codes may require larger dimension rafters. Also available for the android os. Standard joist details 6 gen.

Here we have a wood framed gable roof. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Require bolted diagonal bridging section number 001 168 3 28 07 10 52 am page 5. About o donnell metal deck.

These welded steel products are used to support a building s roof and floors. In addition using the rafters diagram you can see the precise dimensions of the roof rafter including length from every possible angle. Let s consider a basic gable wood roof framing design. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

Allow for ridge thickness when determining rafter run to outer wall. It is measured from the horizontal wall line to the sloped rafter using the rise over run. 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. Half building width minus 1 2 ridge thickness.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Continuing on from part 3. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through. 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.