Construction calculators may give you the wrong jack rafter lengths
To buy Roof Framer’s Bible: https://www.amazon.com/dp/0964335433?...
0:00 Intro
0:23 Theoretical rafter lengths
1:08 Hip rafter cheek cut
2:50 Roof Framer’s Bible gives correct jack lengths
3:52 How to get jack rafters square and on layout
4:55 Decking breaks on the center of the jacks
5:17 Construction calculator’s uses
5:32 Roof Framer’s Bible has all answers precalculated

Author’s Bio:
Barry Mussell started framing houses over forty years ago. He built over 300 homes and commercial buildings with his own hands, before taking on the role of Framing Manager for a large home builder. He trained and supervised hundreds of framing crews who built more than 18,000 homes across the southeastern United States. Thirty years ago he wrote Roof Framer’s Bible – The Complete Pocket Reference to Roof Framing. It has been sold all over the world. He is now focused on training the next generation of carpenters and tradesmen.