Florida Building Code Practice Exam

A masonry unit with a net concrete cross-sectional area of 75% or more is classified as what?

1. Semi-solid masonry unit

2. Solid masonry unit

3. Hollow core masonry unit

4. Hollow masonry unit

The correct answer is: Solid masonry unit

A masonry unit with a net concrete cross-sectional area of 75% or more is classified as a solid masonry unit. This classification is significant within the Florida Building Code because it informs the structural and thermal performance expectations of the material. Solid masonry units typically have greater density and load-bearing capacity compared to hollow variants, making them suitable for structural applications where strength is essential. The characterization of a masonry unit as solid is based on the ratio of the solid material to void space within the cross-section. This threshold of 75% net concrete area ensures that the unit can effectively serve load-bearing functions while offering enhanced stability and resistance to fire and weathering. Understanding these classifications is crucial for professionals working with masonry, as it affects building design, material selection, and compliance with building codes.