NCIDQ Interior Design Professional Exam (IDPX) Practice Exam 2026 - Free Interior Design Practice Questions and Study Guide

The occupancy classification that requires two exits when the occupant load exceeds 49 falls under certain building codes and regulations designed to ensure safety in case of emergencies. In this scenario, the requirement applies to all three classifications mentioned: assembly, mercantile, and business.

For assembly areas, where groups of people gather, having two exits is crucial for facilitating a quick evacuation in case of an emergency, especially as the occupant load increases. The same principle applies to mercantile spaces, such as retail establishments, where a large number of customers may need to exit quickly in the event of fire or other emergencies. Business occupancy, which includes offices and similar environments, also follows safety protocols that mandate additional exits as the number of occupants rises.

This requirement is rooted in the underlying goal of protecting human life and ensuring that occupants have a safe and efficient means of egress. Therefore, as the occupant load exceeds 49 in any of these classifications, the necessity for two exits becomes crucial, affirming that all of these occupancy classifications are governed by similar safety regulations.