The Little Blue Book for Roof and Stairway Layout includes detailed instructions on how to use the Speed Square and Big 12 Speed Square using the One Number Method SM for roof layout. Professional tradesmen rely on accurate measurements. This 60-page book has what is needed to get the job done accurately. Rafter Length Tables, Diagrams and Formulas are included.
- 60 page manual
- 1-number method SM for roof layout
- Includes rafter tables and construction diagrams
- Includes detailed instructions on how to use the speed square and big 12-speed square
- Includes diagrams and formulas to help you on the job
- Essential for every roofer or carpenter
- Little blue book comes with Swanson’s 1-year limited warranty
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