General Contractor Practice Exam

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What is the minimum thickness required for a load-bearing masonry wall in a one-story building?

4 inches
6 inches
8 inches
10 inches

The correct answer is: 6 inches

In the context of building codes and structural requirements, the minimum thickness of a load-bearing masonry wall in a one-story building is typically set at 6 inches. This thickness is deemed sufficient to support the weight of the structure above and to bear the loads associated with the roof and any live loads. While a 4-inch masonry wall may be acceptable in non-load-bearing applications or for interior partitions, it lacks the durability and load-carrying capacity required for supporting structural elements. Thicker walls, such as those measuring 8 or 10 inches, provide additional strength and stability but exceed the minimum required thickness for a one-story building. Therefore, the choice of 6 inches is aligned with standard construction practices, offering a balance between structural integrity and material efficiency.