This book is intended to assist architects, engineers, and contractors to better understand, design, and construct buildings and other structures to protect occupants from natural and manmade threats. This is done, in the context of building safety, a review of both historical and current provisions, an examination of human behaviour in life threatening conditions, details of contemporary building emergency design provisions, documentation of current codes and design practices, and presentation of quantitative methods for evaluating the risk and reliability of different combinations of emergencies, building designs, and occupant characteristics. The subject matter is relatively unique because it is based on a meld of architectural and structural design and reliability engineering experience of the author acquired through over 50 years of practice.