Which of the following is a common location where asbestos-containing materials are found?

• A. Fire doors
• B. Fume hoods
• C. Auditorium curtains
• D. Kiln bricks

Answer: (A)

Asbestos-containing materials are commonly found in components designed to resist heat and fire, and fire doors are a prime example of that usage. In older buildings, door assemblies often used asbestos-containing cores, gaskets, seals, or insulating materials to meet fire-rating requirements. Because fire doors exist in virtually every room and throughout many structures, they represent a frequent location for asbestos within the building envelope.

While other items like fume hood gaskets, asbestos-containing fabrics in some curtains, or high‑temperature kiln bricks can contain asbestos in certain cases, they are not as universally encountered across typical buildings as fire doors. Therefore, fire doors stand out as the most common location to find asbestos-containing materials.