A vehicle containing LP-gas that is parked off the street in an uncongested area must be parked how far from any building used for assembly?

The requirement for parking a vehicle containing liquefied petroleum gas (LP-gas) is critical for ensuring safety in the vicinity of buildings used for assembly. According to NFPA 58, vehicles that are carrying LP-gas should be parked at a minimum distance from such buildings to minimize the risk of fire or explosion that could endanger the occupants or impede evacuation in an emergency situation.

The correct answer indicates that a minimum distance of 50 feet must be maintained from any building used for assembly. This distance has been determined to be adequate for providing a safety buffer zone, allowing ample space to prevent potential ignition sources from coming into close contact with LP-gas. By requiring this specific distance, the code aims to protect individuals in crowded situations, such as those gathered in assembly buildings, and to reduce the potential impact of an LP-gas release.

In summary, maintaining a 50-foot separation from assembly buildings ensures compliance with safety standards designed to protect the public, which is why this answer is correct.