What is the minimum amount of mortar protection required over rebar?

The correct answer indicates that the minimum amount of mortar protection required over rebar is 1/4 inch. This specification is crucial because mortar serves as a protective barrier that prevents corrosion of the rebar, ensuring the structural integrity and longevity of concrete elements.

Using a minimum of 1/4 inch of mortar over rebar helps to uniformly cover the steel reinforcement, creating a physical barrier against moisture and environmental elements that could lead to rusting or deterioration. Proper coverage is vital for the structural performance and durability of masonry and reinforced concrete structures.

Understanding this requirement is essential for inspectors, as inadequate mortar coverage can compromise the safety and durability of the building. Following these guidelines ensures that construction complies with building codes and standards, which are designed to promote safe and reliable structures.