What is required for the door assembly rated for a wall with a fire-resistance rating of 2 hours?

For a door assembly to be effective in a wall with a fire-resistance rating of 2 hours, it must match or exceed that rating, which means it needs to be rated for 2 hours as well. This is crucial in maintaining the integrity of the fire-rated wall and ensuring that the entire assembly, including the door, provides the same level of protection as the wall itself.

When a wall is rated for 2 hours, a door installed in that wall must not compromise the protected environment during a fire. A 1-hour or 1.5-hour rating would not adequately contain the spread of flames and smoke for the full duration required for occupants to safely evacuate and for firefighters to respond. A 3-hour rating, while exceeding the requirement, is unnecessary for this scenario and does not fulfill the exact standard.

Thus, the appropriate response for a door assembly in a 2-hour fire-rated wall is indeed a 2-hour rating, as it ensures compliance with safety codes and maintains effective fire protection within the building environment.