The objectives attributed to the requirements or portions of requirements in Division B are listed in a table following the provisions in each Part of Division B. Functional Statements Functional statements describe conditions t hat satisfy the objectives. The functional statements and the objectives are interco nnected. There may be several functional statements related to any one objective, and a given functional statement may describe a function that serves to achieve more than one objective. Functional statements are qualitative a nd are not intended to be used on their own in the design and approval processes. The NBC's functional statements are defined in Section 3.2. of Division A. The functional statements attributed to the re quirements or portions of requirements in Division B are listed in a table following the provisions in each Part of Division B. Division B: Acceptable Solutions The term “acceptable solutions” refers to the technical requirements contained in the Code. It reflects the principle that Codes establish an acceptable level of risk or performance. Acceptable solutions represent the minimum level of performance that will satisfy the Code's objectives and that is acceptable to an authority that adopts the Code into law or regulation. The requirements in Division B—the acceptable solutions—are linked to at least one objective and functional statement found in Division A. Alternative solutions can be used in lieu of compliance with the acceptable solutions by demon strating that the proposed alternative solution will perform at least as well as the acceptable solution(s) it is replacing. The objectives and functional stat ements attributed to the acceptable solutions identify the areas of performance where this equivalence m ust be demonstrated. National Building Code of Canada 2025 Volume 1 vii ----------------Page (8) Break---------------- © His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2025 © Sa Majesté le Roi du chef du Canada, représenté par le Conseil national de recherches du Canada, 2025 Preface Parts and Disciplines Division B is organized into Parts that are generally related to disciplines; however, related or relevant requirements may be found in more than one Part. For example: • Provisions pertaining to fire safety issues related to heating, ventilating and air-conditioning (HVAC) systems are located in Part 3, Fire Protection, Occupant Safety and Accessibility, and not in Part 6, Heating, Ventilating and Air-conditioning. • Structural requirements related to loads on handrails and grab bars are located in Part 3, Fire Protection, Occupant Safety and Accessibility, while structural requirements related to loads on guards and handrails are located in Part 4, Structural Design. Division C: Administrative Provisions Division C contains administrative provisions relating to the application of the Code. Many provinces and territories establish their own administrative provisions upon adopting or adapting the Code. In addition, a separate document entitled Adm inistrative Requirements for Use with the National Building Code of Canada 1985, in accordance with Article 2.2.1.1. of Division C, is available for adoption by authorities having jurisdiction. Additional Information Intent Statements Intent statements for the provisions in the NBC are published as a separate electronic document entitled “Supplement to the NBC 2 025: Intent Statements,” which is made available through the NRC Publications Arch ive at https://nrc-publications.canada.ca. Intent statements serve explanatory purposes only and do not form an integral part of the Code provisions. As such, they are similar in function to the explanatory Notes at the end of each Part. Intent statements explain how requirements contribute to achieving the attributed objectives and functional statements. Intent statements are expressed in terms of risk avoidance and expected performance. They offer insight into what the Code provisions are intended to achieve. Numbering System A consistent numbering system is used thro ughout the National Model Codes. The first number indicates the Part of the Code; the second, the Section in the Part; the third, the Subsection; and the fourth, the Article in the Subsection. The detailed provisions are found at the Sentence level (indicated by numbers in brackets), and Sentences may be broken d