Roof Joist Angle Thickness

Allow for ridge thickness when determining rafter run to outer wall.

Roof joist angle thickness.

Roof pitch calculator results explained. These welded steel products are used to support a building s roof and floors. See rafter run to outer wall calculator below. 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.

Let s consider a basic gable wood roof framing design. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. In addition using the rafters diagram you can see the precise dimensions of the roof rafter including length from every possible angle. Once all of these inputs have been entered into the calculator you will see that the appropriate rafter width is 120 33 inches.

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. Here we have a wood framed gable roof. Half building width minus 1 2 ridge thickness.

They are custom engineered to suit the design of each building. Standard joist details 6 gen. Continuing on from part 3. For low pitch roofs building codes may require larger dimension rafters.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Bridging angle size equal leg angles table 2 6 1b lh series joists maximum joist spacing for horizontal bridging spans over 60 ft. 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.

It is measured from the horizontal wall line to the sloped rafter using the rise over run. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Ridge the upper edge where two roof slopes or decks meet. 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. About o donnell metal deck. Also available for the android os. K series joists range in depth from 10 to 30 and can span up to 60.