New Mexico Administrative Code
Title 14 - HOUSING AND CONSTRUCTION
Chapter 7 - BUILDING CODES GENERAL
Part 2 - 2021 NEW MEXICO COMMERCIAL BUILDING CODE
Section 14.7.2.17 - CHAPTER 9 - FIRE PROTECTION SYSTEMS

(1) Section 909.8 - Exhaust method. See this section of the IBC except as provided below. Section 909.8.1 - Smoke layer. Delete this section of the IBC and substitute with the following: The height of the lowest horizontal surface of the accumulating smoke layer shall be maintained at least six feet (1829 mm) above any walking surface which forms a portion of a required egress system within the smoke zone. The required exhaust rate for the zone shall be the largest of the calculated plume mass flow rates for the possible plume configurations. Provisions shall be made for a natural or mechanical supply of air from outside or adjacent smoke zones to make up for the air exhausted. Makeup airflow rates, when measured at the potential fire locations shall not increase the smoke production rate beyond the capabilities of the smoke control system. The temperature of the makeup air shall be such that it does not expose temperature-sensitive fire protection systems beyond their limits.

(2) Section 909.9 - Design fire. Delete this section of the IBC and substitute with the following. The design fire shall be based on a rational analysis performed by a registered design professional and approved by the building official. The design fire shall be based on the analysis in accordance with Section 909.4 and this section.