to reflect the importance of this topic and the need to consider it early in the planning process. Please send any feedback and suggestions on new or improved content, which are highly valued, to: The chapters are based on major aspects of wood-frame house construction and reflect typical practices, some of which vary across Canada. Readers are urged to consult local building departments, trades and suppliers for additional direction. Canadian Housing Information Centre Canada Mortgage and Housing Corporation 700 Montreal Road Ottawa ON K1A 0P7 chic@cmhc-schl.gc.ca Ideally, users of this book should read the book from start to finish. However, if specific information is required, each chapter has been developed as a stand-alone reference. In order to keep this book to a manageable size, a glossary of the numerous housing terms used in this book is not included. Readers should consult CMHC’s Glossary of Housing Terms. NEW FEATURES This edition of Canadian Wood-Frame House Construction has been updated to reflect the residential requirements of the 2010 edition of the National Building Code of Canada (NBC), including new energy efficiency requirements in the 2012 Interim Changes to the 2010 NBC. Many other changes have been made to bring the book in line with current building science research, construction methods and construction materials. CHOOSING THE SIZE AND SPACING This edition also includes “Choosing the Size and Spacing” text boxes that provide examples for sizing the typical wood structural components of a house based on the tables in the Appendices. For situations not covered by the tables, consult a structural engineer. SUSTAINABLE HOUSING INSIGHT CMHC is committed to providing the Canadian housing industry with reliable information on appropriate housing technology that responds to people and the environment. In this edition, practical considerations derived from CMHC’s sustainable housing initiatives have been included in “Sustainable Housing Insight” text boxes like this one. These include technologies, building methods and products that would make a house more sustainable or improve performance beyond industry standard practice. Canada Mortgage and Housing Corporation xiv