Compound Miter Angle and Saw Blade Bevel Angles

No roof framing study is complete without a complete understanding of crown molding angles. Compound miter angle and bevel angles are the same for crown molding, purlins, frieze blocks and square tail fascia. All of these use the same compound miter angle and bevel angles, because all of the cuts are made perpendicular to the the roof surface.

Calculate Spring Angle
Crown Molding Miter and Bevel Angles Calculator for Compound Miter Saw Settings
Polygon Crown Miter Angle and Saw Blade Bevel Angles Calculator.
Rake Crown Miter Angle and Saw Blade Bevel Angles Calculator.
Radius Crown Miter Angle and Saw Blade Bevel Angles Calculator

 http://www.raftertools.com/help/crown_online.htm

Apprentice Carpentry Roof Framing Geometry Part 3

If you're not ready for a roof line like this one, Mark of  www.velocirafter.com has produced some excellent videos on the basics of roof framing using a framing square.

Roof framing video tutorial. Common Rafters, Barge Rafters and Ridge Beam height using math, illustrated in Gable Roof.
http://www.youtube.com/watch?v=9Ya3YK36-8k

Hip Rafter Layout.
http://www.youtube.com/watch?v=TyxccvIE-IY&feature=plcp

Layout and cutting of rafters for Gazebo. Beware: it uses math!
http://www.youtube.com/watch?v=7ENZFclJ1E4&feature=relmfu

Photo by Ingrid Taylar http://www.ingridtaylar.com/