Geometry is the base of all Trigonometric Functions in roof framing.

I have been a framer for 16 years and this book has been useful on most of the houses I build. Not only does it have all the standard rafter tables but the irregular combinations as well. It is very easy to understand and gives all the needed formulas. A MUST have for any framer.

Starts out with detailed coverage of standard building materials and up-to-date how-to information about modern power tools and safety requirements...explores all the standard framing methods...demystifies some of the more obscure tasks, such as building gable dormers...and structural foundations. "Popular Mechanics." "

Build your own passive solar greenhouse for year-round food production in any climate Fresh, local nutrient-dense fruits vegetables are hard to find in winter in cold climates. Growing warm-weather crops like tomatoes, bananas, avocados, and other perennials is nearly impossible using conventional structures. The solution for millions of backyard and small-scale commercial growers is self-heating solar greenhouses. The Year-round Solar Greenhouse is the one-stop guide to designing and building greenhouses that harness and store energy from the sun to create naturally heated, lush growing environments even in the depths of winter, covering principles of solar greenhouse design and siting, glazing material properties and selection, controlling heat loss, ventilation, and construction methods. Additionally, an in-depth section covers sustainable ways of heating the greenhouse without fossil fuels, including using thermal mass and storing heat underground with a ground to air heat exchanger. Variations include attached solar greenhouses, earth sheltered greenhouses, plus integrating hydroponics and aquaponics. More than a dozen case studies from across North America provide inspiration and demonstrate specific challenges and solutions for growing year-round in any climate. Grow your own food, anytime, anywhere using the power of the sun!

"Updated with 12 new Fine Homebuilding articles, this latest edition covers roof-framing basics as well as advanced techniques on building dormers and raising trusses, and includes information on how t use rafter squares, cordless framing nailers, and other framing tools"--Back cover.