North Carolina Building Contractor License Practice Exam

What is the maximum permissible size of reinforcement used in masonry?

1. No. 8

2. No. 9

3. No. 10

4. No. 11

The correct answer is: No. 11

The maximum permissible size of reinforcement used in masonry, which is No. 11, is significant because it reflects both structural integrity and compliance with building codes. No. 11 bars, with a diameter of 1.41 inches, provide sufficient tensile strength and support for masonry structures, ensuring they can withstand various loads, including vertical and lateral forces. This size is commonly allowed because it strikes a balance between strength and workability within masonry elements. Larger bars could complicate the placement and bonding of concrete around the reinforcement, potentially diminishing the effectiveness of the structural assembly. Additionally, guidelines set by the relevant building codes dictate the maximum size to prevent difficulties associated with constructing forms and ensuring adequate concrete cover, which are critical for preventing corrosion and ensuring the longevity of the reinforcement. Understanding the specifications for reinforcement sizes is essential for contractors, as using reinforcement bars that meet these standards helps ensure compliance with safety regulations and structural performance requirements in masonry construction.