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// CODE SNIPPET

604.1.2 Duct Coverings and Linings

California Mechanical Code 2019 > 6 Duct Systems > 604.0 Insulation of Ducts > 604.1 General > 604.1.2 Duct Coverings and Linings
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Insulation applied to the surface of ducts, including duct coverings, linings, tapes, and adhesives, located in buildings shall have a flame-spread index not to exceed 25 and a smoke-developed index not to exceed 50, where tested in accordance with ASTM E84 or UL 723. The specimen preparation and mounting procedures of ASTM E2231 shall be used. Air duct coverings and linings shall not flame, glow, smolder, or smoke where tested in accordance with ASTM C411 at the temperature to which they are exposed in service. In no case shall the test temperature be less than 250°F (121 °C). Coverings shall not penetrate a fire-resistance-rated assembly.

Related Code Sections


604.1.2 Duct Systems, Ducts Coverings and Linings
Insulation applied to the surface of ducts, including duct coverings, linings, tapes, and adhesives, located in buildings shall have a flame-spread ...
California Mechanical Code 2016 > 6 Duct Systems > 604.0 Insulation of Ducts > 604.1 General > 604.1.2 Ducts Coverings and Linings
604.1.2 Duct Systems, Duct Coverings and Linings
Insulation applied to the surface of ducts, including duct coverings, linings, tapes, and adhesives, located in buildings shall have a flame-spread ...
California Mechanical Code 2019 > 6 Duct Systems > 604.0 Insulation of Ducts > 604.1 General > 604.1.2 Duct Coverings and Linings
720.1 Fire and Smoke Protection Features, General
insulation and duct and pipe coverings and linings in plenums shall comply with the California Mechanical Code . All layers of single and multilayer ...
California Building Code 2016 (Vol 1 & 2) > 7 Fire and Smoke Protection Features > 720 Thermal- And Sound-Insulating Materials > 720.1 General
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