The Jack Rafter Mobile App has been developed to enable both the casual and professional carpenter to work out the following calculations when assembling traditional roof trusses.

The App’s Calculator lets you work out:
• Rafter Lengths
• Hip/Valley Length
• Rise
• Jack Rafter Reductions
• Rafter Plumb Cut
• Rafter Seat Cut
• Hip/Valley Plumb Cut & Seat Cut
• Hip Backing Bevel
• Jack Rafter Edge
• Hip/Valley Top Mitre Cut

The App also includes:
• 5 Languages including English, French, German, Spanish and Italian
• Input in both Imperial and Metric measurements
• A Handy Notes Section
• Cheat Sheet containing definitions for the common carpentry terms
• Contact a Carpenter - you can email your questions through to a seasoned professional with over 30 years of experience