Which type of structural wall construction is typically rated for a shorter duration?

Wood frame construction is typically rated for a shorter duration compared to other types of structural wall construction like masonry, steel frame, and concrete. This is largely due to the inherent properties of wood. Wood is more susceptible to fire damage and has lower fire resistance ratings, which means it cannot withstand fire exposure for as long as materials like masonry, steel, or concrete.

Masonry, for example, is known for its durability and fire resistance due to the nature of brick and concrete materials. Similarly, steel has a higher melting point and can maintain structural integrity under fire conditions longer than wood. Concrete also offers significant fire resistance due to its non-combustibility and mass, allowing it to endure higher temperatures for extended periods.

Thus, in the context of fire safety and building codes, wood frame construction is acknowledged for requiring shorter time calculations in fire resistance ratings, which aligns with the choice that identifies it as typically rated for a shorter duration.