There are a few good ready reckoners available.
The roofing ready reckoner.
Online roofing ready reckoner.
Each page has a different table depending on the pitch angle of your roof with all the figures you need.
Additional information is provided on wall plate and gable strapping wind bracing truss clips and other roofing.
A ready reckoner is pretty much a rafter length calculator a book full of tables for working out the rafter lengths quickly and easily.
How to use the ready reckoner for the purposes of explaining the use of the ready reckoner reference should be made to the roof constructions illustrated in figs 4 and 5.
Additional information is provided on wall plate and gable strapping wind bracing truss clips and other roofing metalwork and tools and equipment.
That are also known as the roofing carpenter s ready reckoners.
Now fully revised the third edition of this renowned book by ralph goss has been made even more valuable with the addition of many new illustrations and takes into account not only traditional cut roof construction but also modern trussed rafter roof assembly methods.
Synopsis goss roofing ready reckoner provides rafter dimensions for timber roofs of any span and pitch.
Goss s roofing ready reckoner provides rafter dimensions for timber roofs of any span and pitch.
I bought a copy of goss s roofing ready reckoner.
This new edition includes roof timber member design tables information on warm and cold roofs.
Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.
Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.
This new edition includes roof timber.
Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries.
Goss s roofing ready reckoner provides cutting angle and lengths for traditional cut roofs and design tables for timber sizing based on bs5268 structural use of timber and now including a comparison of timber sizes using eurocode 5 design of timber structures.
Additional information is provided on wall plate and gable strapping wind bracing truss clips and other roofing metalwork and tools and equipment.
In practical terms these constructions will cover most traditional roof forms and take account of the hip and valley infills used on trussed rafter construction unless fully.
This roofing calculator will work on any device with web access and is designed to replace the unwieldy hard copy look up tables.