A Frame Roof Pitch
A Frame Roof Pitch . Place your level under the bottom of the rafter, and after the bubble. There are several different types of pitched roof: Pitch is the ratio of unit of rise to the unit of span. A Tale of Two Pitches Exploring OffAngle Roof Framing Fine Homebuilding from www.finehomebuilding.com When using pitch, the slope of the roof is given as a ratio of the vertical rise to the horizontal run (rise/run). Select angle tool from tool bar (pictured as angle a with arc through it) the select points fig in order.