Division B: Part 3: Fire Protection, Occupant Safety and Accessibility A free digital version of the National Building Code of Canada 2015 (NBC). 120 minute read ❤️ Save Guide Start reading In this guide 3.1.1. Scope and Definitions 3.1.2. Classification of Buildings or Parts of Buildings by Major Occupancy 3.1.3. Multiple Occupancy Requirements 3.1.4. Combustible Construction 3.1.5. Noncombustible Construction 3.1.6. Tents and Air-Supported Structures + 74 more