When floor joists are supported by masonry walls, the joists shall have a minimum bearing distance on each end of how many inches?

The correct answer of 3 inches is based on building codes that dictate the minimum bearing distance required for floor joists supported by masonry walls. This minimum bearing distance is crucial for ensuring the structural integrity and stability of the floor system. A bearing distance of at least 3 inches allows for proper distribution of loads and provides enough surface area to help prevent potential issues such as cracking or excessive deflection in the joists or wall.

This requirement also takes into account factors like the potential for moisture at the masonry interface, which could affect the connection over time. Adhering to this standard can significantly contribute to the longevity and safety of the structure, making it a fundamental aspect of construction best practices.