Dual Slope Roof (Saltbox)
The Dual Slope option calculates a front and rear common rafter for a "saltbox" or "split pitch" style roof. While you could simply calculate two separate common rafters, this option allows you to adjust the measurements for each rafter to see how they affect the roof as a whole. The preview window displays a side elevation view that updates dynamically to reflect the actual dimensions of the roof, including the difference in elevation between the front and rear wall plates.
The front and rear rafters are drawn and dimensioned individually on separate pages.Each rafter has its own settings for slope, run, overhang, heel, seat, and lumber sizes. Because of the number of settings, the design information is split between two pages. Tabs will appear at the bottom of the input area that can be used to switch between the two pages.