Pitch Table Roof Rafters

Roof pitches are given in rise in run rise over run and in degrees.

Pitch table roof rafters. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. The rafter tables allow you to calculate the length of a rafter by choosing a full scale number that matches the unit rise slope or angle of the roof. Here we have a wood framed gable roof. Angle the angle of a roof is the same as the roof s slope except instead of being.

Let s consider a basic gable wood roof framing design. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

Roof pitch calculator results explained. 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. This table shows the roof pitch multiplier also called the roof pitch factor for typical roof slopes used to find the area of sloped roofs or the lengths of common rafters. Continuing on from part 3.