At what elevation should audible notification appliances be mounted above the finished floor?

Audible notification appliances, such as alarms and horns, are essential components in fire alarm systems, as they signal the presence of danger and prompt evacuation. The standard mounting height for these appliances is set to optimize their effectiveness and ensure that the sound is both audible and clear throughout the area they are intended to protect.

90 inches above the finished floor is the specified height because it ensures that the sound can travel effectively while minimizing the possibility of obstruction by furniture or other objects. This height also aligns with accessibility requirements, allowing individuals who may be seated or those using mobility devices to perceive alerts appropriately. By following this standard, you can help ensure that the notification system operates efficiently, notifying all individuals in a space rapidly and effectively.

Other options suggest heights either lower or higher than this standard, which could result in obstructed sound paths or lower audibility, thus compromising the safety measures intended by the installation of such appliances.