Rafter Pitched Roof

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

Rafter pitched roof.

Roof rafters and shed roof pitch. When talking about framing a shed roof with rafters you ll first need to know how steep your roof is in other words what is the pitch or slope of your roof. Roof pitch refers to the slope which the rafter creates. 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.

It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof. Roofs with a slope less than 3 12 and roofs greater than 3 12. 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. Often you express roof pitch as the ratio between the rise and the run in the form of x 12.

Roof pitch is simply the slope created by the rafter. Next set the framing square on top of the rafter beam and use a pencil to trace the outside edge of the framing square s tongue. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. Most rafter span charts are organized into 2 sections.