How far must the trajectory of shells remain from overhead objects?

The correct distance that the trajectory of shells must remain from overhead objects is 25 feet. This regulation is in place to ensure safety during fireworks displays, as the shells can travel upward at high velocities and have the potential to reach significant heights. Maintaining a distance of at least 25 feet helps to minimize the risk of the shells impacting buildings, trees, or other overhead structures. This clearance is crucial in preventing accidents that could occur if a shell were to strike an object in the air, which could lead to malfunctions or unexpected explosions. The regulation is designed to provide a safe buffer zone that accounts for both the trajectory of the fireworks and any potential obstacles that may be present in the area above the launching site.