Where two or more exits are required, not more than 1/2 of the total number of exits or total exit minimum width or required capacity must be horizontal exits.

In a commercial building, when two or more exits are necessary for safety and code compliance, regulations typically stipulate that no more than half of the total number of exits or exit capacity may be horizontal exits. This requirement is crucial because horizontal exits, which allow movement to an adjacent space rather than directly to the exterior, can sometimes limit the effectiveness of egress pathways during emergencies.

By restricting the number of horizontal exits, building codes ensure that a sufficient number of vertical exits (like stairwells) are available. This is essential for maintaining clear and prompt evacuation routes during events like fire drills, emergencies, or hazardous situations. If an insufficient number of vertical exits are available, it can lead to congestion, unsafe conditions, and potential risks to occupant safety.

Thus, the statement is true because it reflects a fundamental design principle in building safety regulations aimed at ensuring that occupants have viable and effective means of egress during emergency scenarios. This adherence to exit ratio helps to enhance overall safety by maintaining a balance between different types of exits in a commercial building.