Which materials are nonfriable asbestos-containing materials?

• A. Sprayed-on fireproofing and pipe insulation.
• B. Vinyl asbestos floor tile.
• C. Asbestos cement siding.
• D. Asbestos cement siding and vinyl asbestos floor tile.

Answer: (D)

Nonfriable asbestos-containing materials are those that won’t crumble or pulverize into fibers by hand pressure; they stay intact and only release fibers if damaged, cut, or abraded. Among the options, asbestos cement siding and vinyl asbestos floor tile are both bound in a matrix and are considered nonfriable when intact. In contrast, sprayed-on fireproofing and pipe insulation containing asbestos are typically friable, meaning they can crumble and release fibers more readily if disturbed. So the materials that are nonfriable are asbestos cement siding and vinyl asbestos floor tile.