What distance must individual mortars that are more than 3 inches in diameter be separated?

The requirement that individual mortars greater than 3 inches in diameter must be separated by at least 10 times their diameter is crucial for ensuring safety during fireworks displays. This regulation addresses the potential hazards associated with the launching of aerial shells, particularly the risk of fire or injury if fireworks malfunction or if there is an unintended ignition of nearby mortars.

By setting the separation distance at 10 times the diameter, the NFPA 1123 standard aims to create a buffer zone that reduces the risk of projectiles impacting other mortars or spectators. The larger the diameter of the mortar, the more significant the explosive power and potential danger, necessitating a greater distance to mitigate these risks effectively.

This separation also allows for better management of the fallout zone, giving sufficient space for debris to fall safely away from spectators and other flammable materials. Compliance with this regulation is essential for public safety, environmental protection, and minimizing liability during such events.