Using the 7 inch rise table and our 15 run the common rafter length is 17 43 8.
Roof cuts and rafter lengths book.
The most useful book ever if you want to cut a roof.
Calculations for roof frames roof cuts and rafter lengths.
A ready reckoner is pretty much a rafter length calculator a book full of tables for working out the rafter lengths quickly and easily.
Rafter book page 1 created date.
With calculations diagrams and tables.
Tail or eave length.
Lots of illustrations and easy to follow example problems.
Details cuts and bevels for all rafters.
For larger roofs though i use a roofing ready reckoner.
The tail or eave overhang must be added to the rafter length.
This is the rafter length from the top cut to the seat plumb mark.
The respective lengths for those two rafters and add them together.
Exact lengths of all rafters including all regular and irregular hips valleys commons and jacks.
Invaluable to anyone who wants to cut a roof by hand and not use trusses.
Gives rafter runs to locate ridges and framing points.
There are a few good ready reckoners.
Subtract what you are using as a ridge and you have your length perfect every time.
Roof cuts and rafter lengths hancock s 10th edition is a very popular best selling book.
Roof sheathing cuts and angles.