For a school grades 9-12 using Type IIA construction with a sprinkler system, what is the maximum number of stories allowed above the grade plane?

• A. 2
• B. 3
• C. 4
• D. 5

Answer: (C)

In the context of North Carolina Building Code, Type IIA construction applies to buildings designed to be fire-resistive and that do not use combustible materials in their structural framework. For educational facilities such as a high school serving grades 9-12, the maximum allowable height is dictated by occupancy classification, construction type, and the presence of fire protection systems like sprinklers.

When a building of this type utilizes a sprinkler system, it allows for increased height and the number of stories. According to the North Carolina Building Code, Type IIA construction can accommodate a building height that is taller than some less fire-resistive types due to the protection within. Specifically, as it relates to schools, the code permits these buildings to have up to four stories when they are equipped with an automatic sprinkler system.

This provision recognizes the enhanced safety that sprinklers provide, allowing for greater vertical expansions than would be permissible in a non-sprinklered facility or in those constructed with a less fire-resistive design. Therefore, for a Type IIA construction school that utilizes a sprinkler system, the limit set by the building code is four stories above grade plane, making this choice the correct response.