What specific fire-resistance rating (in hours) is typically required for hoistway enclosures in high-rise buildings?

In high-rise buildings, hoistway enclosures are typically required to have a fire-resistance rating of at least two hours. This means the walls and doors of the elevator shaft must be constructed of materials that can withstand exposure to fire for a minimum of two hours without structural failure or allowing the passage of flames or excessive heat. The purpose of this fire-resistance rating is to prevent the rapid spread of fire and smoke throughout the building via the elevator shaft. The hoistway acts ....