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Rafter Calculator

Rafter Run Outer Wall
Roof Angle ° : 12
Overhang (level)
Rafter Depth

Wall Thick
Show
Allow for ridge thickness Consider Ridge Thickness when determining Rafter Run to Outer Wall.

eg: Half building width minus 1/2 ridge thickness. See Rafter Run to Outer Wall Calculator below.

Print full scale Rafter Plumb Cut Templates and Birdsmouth Templates
Fold template over rafter to mark or cut through.

Angle
Overhang

scale Use and Keyboard Keys to scale Birds-mouth. Birds-mouth




Remember Ridge Thickness Remember to allow for Ridge Thickness in Rafter Run to Outer Wall.


Rafter Run to Outer Wall

Building Width
Ridge Thick


Need these calculations on-site? Try the site with an iPad or Android Tablet. With a tablet, you can directly measure angles for input to the Roofing and Pitch Angle calculator apps. Lay the tablet on an incline and tap to measure angle. Tap again to capture angle and auto calculate roof, pitch, angles etc. The buttons appear automatically when you visit with a device capable of pitch measurement.





Slider Controls To fine tune Slider Controls click to select and use (cursor) keyboard keys.

Open new window containing only diagram images in current page ↓ This will better fit printed page. Printing to Scale Help
Print all diagrams on current page

Use your iPad or Android Tablet On-Site Your iPad, iPhone or Android Tablet or Phone is a valuable On-Site tool!
Lay your phone or tablet on an angled surface (roof ?) to directly measure angles and automatically calculate Roofing and Pitch Angle Apps.

If you've benefited from this free service please consider a small donation to:
Starlight Children's Foundation

Starlight Children's Foundation Supporter


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Contact Us

Greg Tarrant - blocklayer.com - ph: (Australia) +61 7 40987645 - mob: 0438 165 753

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Questions or Suggestions? ph: +61 7 40987645

ALWAYS CHECK WITH YOUR LOCAL BUILDING AUTHORITY BEFORE LAYING OUT OR BUILDING ANYTHING
AND FOLLOW ALL LOCAL CODES. VERIFY ALL DIMENSIONS AND ANGLES BEFORE CONSTRUCTION


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