This edition of the NBC has been restructured to improve ease of access to interdependent provisions. The explanatory Notes for Division B provisions-which were formerly grouped in Appendices A and B-are now included at the end of the Part to which they apply (e.g., the Notes for Part 3 provisions are at the end of Part 3, etc.). The Attribution Tables are now included with each Part instead of being grouped in Volume 1. Appendices C and D are now at the end of Volume 1. Part 9 along with its Attribution Table and explanatory Notes is now self-contained in Volume 2.
To improve clarity and ease of use, the application and design provisions in Section 3.8. of Division B have been separated and regrouped according to subject matter into three Subsections: Scope, Application and Design.
The provisions in Part 6 of Division B have been reorganized into a more logical sequence and divided according to major mechanical elements. General provisions are now grouped at the front end followed by system-specific provisions, which allows for easier, more intuitive access to information.
The fire and sound resistance tables-which were previously located in Appendix Note A-9.10.3.1. of Division B-have been moved to the end of the Part 9 provisions as Tables 9.10.3.1.-A and 9.10.3.1.-B. They have been relocated because they contain specifications for assembly construction that represent acceptable solutions to requirements for minimum sound transmission ratings in Parts 5 and 9 and to requirements for minimum fire-resistance ratings in Part 9.