Common Rafter Calculator - Rafter Dimensions - Plumb Cuts - Birds-mouth Dimensions + Cutting Templates - Imperial
Allow for 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 Cut Templates and Birdsmouth Templates
Fold template over rafter to mark or cut through.
Use 〈 and 〉 Keyboard Keys to scale Birds-mouth.
Calculate Rafter Run
to Outer Wall
If you're cutting blocks, concrete, stone or ANYTHING
and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST
- Silicosis Sucks
Please help promote this free service
Tell a Friend about this site!
Create PDF to print diagrams on this page.
Help & Settings
Printing Help (new window)
Copy all diagrams on this page to bottom of page - Make multiple copies to Print or Compare.
View page on Phone via QR Code (Not current calculation result)
(Australia) +61 7 40987645 m: 0438 165 753
All calculators on this site are geometric only.
Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.
Copyright © 2019 - blocklayer.com
If you've benefited from this free service please consider supporting