Division B: Part 5: Environmental Separation A free digital version of the National Building Code of Canada 2015 (NBC). 50 minute read ❤️ Save Guide Start reading In this guide 5.1.1. Scope 5.1.2. Application 5.1.3. Definitions 5.1.4. Resistance to Loads and Deterioration 5.1.5. Other Requirements 5.2.1. Environmental Loads and Design Procedures + 27 more