Spaces under grandstands or bleachers that are used for purposes other than _______________ must be separated by fire barriers and horizontal assemblies.

The correct completion of the statement emphasizes the importance of fire safety measures in specific areas under grandstands or bleachers. When spaces under these structures are utilized for purposes other than ticket booths, particularly those that occupy less than 100 square feet, it is necessary to separate these areas with fire barriers and horizontal assemblies to mitigate fire risks.

Ticket booths, especially when they are small, are often viewed as low-risk areas that do not require the same stringent fire separations that larger assembly spaces would require. This exemption is in accordance with building and fire codes, which are designed to balance safety with practical use of space.

On the other hand, areas designated for uses such as storage or other assemblies would require more structural protection due to the potential for fire hazards associated with those activities. By enforcing separations for uses that exceed the tolerance set forth for ticket booths, a higher standard of safety is maintained, preventing the spread of fire from more hazardous areas to those less likely to contribute to a fire event.

Thus, stressing the need for fire barriers around areas not designated as ticket booths, particularly when they exceed the specified size, reinforces adherence to safety codes essential in commercial building inspections.