The Roof Framing Calculator V3.1

The latest release of The Roof Framing Calculator V3.1 brings improvements to the way the calculator calculates the overhangs and total lengths for the common, hip and valley rafters. It now makes provisions for sub fascia and fascia thicknesses as well as any building finishes that will be applied. These measurements are now factored into the overhang projections and final rafter lengths.

You can now explicitly set the calculations for either a hip or gable roof. All displayed measurements are now in feet & inches (06/29/2008).

Last but not least the ability to choose between single and double cheek cut hips has been implement. What's up next is the ability to calculate octagons roofs (06/30/2008).

• Hip or Gable Roofs:
• Single or Double Hip/Valley Cheek Cuts input:
• Sub Fascia and Fascia inputs:
• Building Finishes:
• Building Plumb Line Measurement:
• H.A.P. Cuts or Standard and Full Bearing:
• Inputs for Rafter Plate Widths:
• Control over all Framing Member Sizes:
• Number of Common Rafters:
• Common Plumb Cut Angle:
• Common Seat Cut Angle:
• Common Unit Length:
• Total Common Rafter Length:
• Common Length from Ridge to Building Line:
• Common Overhang Projections:
• Total Hip & Valley Length:
• Hip/Valley Length from Ridge to Building Line:
• Hip/Valley Overhang Projections:
• Hip Plumb Cut Angle:
• Hip Seat Cut Angle:
• Hip Unit Length:
• Hip Drop:
• Hip Backing Angle:
• Hip Inch Rise:
• Plywood Sheathing Angle:
• Plywood Bevel Cut Angle:
• On Center Spacing Inputs:
• Layout Spacing Styles (future):
• Up to 24 jack-rafters:
• Jack-Rafter Common Difference:
• Total Number of Jack-Rafters:
• Roof pitches to 24 in 12:
• Building widths to 64':
• Building lengths to 101':

So check back often to see what new features have been added.

If you have any comments or suggestion feel free to email me.

Explore the calculator: