Which of the following materials is typically NOT considered TSI?

The correct answer is that acoustic ceiling tiles are typically not considered Thermal System Insulation (TSI). TSI specifically refers to materials that are used to insulate pipes, ducts, and equipment for thermal control and energy efficiency purposes.

Materials such as insulation wrap around pipes, fireproofing materials on structural steel, and wall texture applied with spray can be classified as TSI as they provide thermal resistance or are part of thermal insulation systems. In contrast, acoustic ceiling tiles serve primarily to improve sound absorption and acoustic treatment within a space rather than to provide thermal insulation. Their primary function is to manage sound quality within a building rather than to insulate against heat loss or gain, which distinguishes them from traditional TSI materials.

Understanding these distinctions is crucial for asbestos investigators, as it helps them identify materials that may require specific handling and assessment procedures when asbestos is involved.