Roof Joist Angle Thickness

Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.

Roof joist angle thickness.

K series joists range in depth from 10 to 30 and can span up to 60. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. They are custom engineered to suit the design of each building. 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.

Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through. Span calculator for wood joists and rafters also available for the android os. In addition using the rafters diagram you can see the precise dimensions of the roof rafter including length from every possible angle. 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. Ridge the upper edge where two roof slopes or decks meet. For low pitch roofs building codes may require larger dimension rafters. Also available for the android os.

Angle the angle of a roof is the same as the roof s slope except instead of being. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. Continuing on from part 3. Includes result for hip valley factor slope factor and the roof slope in degrees.

A 14 angle gives a 3 12 slope 4 12 is an 18 2 angle and 6 12 a 26 6 angle. Standard joist details 6 gen. Once all of these inputs have been entered into the calculator you will see that the appropriate rafter width is 120 33 inches. Let s consider a basic gable wood roof framing design.

Here we have a wood framed gable roof. See rafter run to outer wall calculator below. About o donnell metal deck. Half building width minus 1 2 ridge thickness.

Floor beam span tables of residential structural design we will now look at roof rafter and beam design. Roof pitch calculator results explained. Require bolted diagonal bridging section number 001 168 3 28 07 10 52 am page 5. Here the wall thickness is 240 57 inches.