Standard: ASTM D635 – Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position

Certification Required: The International Building Code (IBC) requires this fire test—among others—for light-transmitting plastics. Manufacturers may find it beneficial to obtain an Intertek certification (ETL Mark or Code Compliance Research Report) to provide third-party assurance of their material's performance characteristics.

Additionally, the Florida Building Code (FBC) High Velocity Hurricane Zone (HVHZ) / Miami-Dade requires this test—among others—in order to qualify as an "Approved Plastic." Manufacturers may wish to obtain a Notice of Acceptance (NOA) from Miami-Dade or a statewide Florida Product Approval. The CCRR can be used in support of a Florida Product Approval.

Scope: Per ASTM D635, "This test method was developed for polymeric materials used for parts in devices and appliances. The results are intended to serve as a preliminary indication of their acceptability with respect to flammability for a particular application…This standard is used to measure and describe the response of materials…to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazards or fire risk assessment of materials, products, or assemblies under actual fire conditions."

Applicable Products: Plastic materials

Test Procedure: The test specimen is supported horizontally at one end, and the free end is exposed to a gas flame for 30 seconds. After removal of the flame, the test specimen is observed for time and extent of burning. An average burning rate is reported for a material if it burns to the 100 mm mark from the ignited end.

End Result: The test results in a measure of the material's flammability. Optionally, materials may be classified as appropriate and in accordance with the standard's appendix (i.e. HB, CC1, or CC2).

Special Notes: (None)

Intertek Testing Locations: York, PA; Middleton, WI; Coquitlam, BC; Pittsfield, MA


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