What is the fire resistance rating required for structural components in Type II-A construction?

In Type II-A construction, the fire resistance rating required for structural components is indeed one hour. This type of construction is commonly used in buildings that have non-combustible materials, meaning that while the structural components must provide a level of fire resistance, this level is less than that required for more fire-resistive construction types such as Type I.

The one-hour fire resistance rating is designed to limit the spread of fire and allow for occupants to safely egress from the building in the event of a fire. This standard reflects a balance between structural integrity and safety, allowing Type II-A construction to be both economical and compliant with safety codes typically set in building regulations.

The other ratings listed are higher and would apply to different construction types or uses where increased fire resistance is necessary to safeguard against potential fire hazards.