Where is a fire stop support plate located in a dedicated vent system?

In a dedicated vent system, a fire stop support plate is crucial for ensuring safety and compliance with building codes. Its primary function is to provide structural support and to prevent the spread of fire and smoke between different floors of a building.

When the vent system passes through a ceiling, it creates a potential pathway for fire and smoke to travel from one space to another. The fire stop support plate is installed in this location to seal the opening around the vent, restricting the spread of fire and maintaining the integrity of the building's fire barriers. This is essential for ensuring the safety of occupants and preserving the overall fire-resistance rating of the structure.

Other locations mentioned in the options do not provide the same level of fire containment or structural support that is critical at the point where the vent passes through a ceiling, making this the most appropriate choice.