General requirements.

16 C.F.R. § 1616.3
in effectEffective: 2024-07-01
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(a) Summary of test method. Conditioned specimens are suspended one at a time vertically in holders in a prescribed cabinet and subjected to a standard flame along their bottom edges for a specified time under controlled conditions. The char lengths are recorded. (b) Test criteria. The test criteria when the testing is done in accordance with § 1616.4 Sampling and acceptance procedures and § 1616.5 Test procedures are: (1) Average char length. The average char length of five specimens shall not exceed 17.8 cm. (7.0 in.). (2) Full-specimen burn. No individual specimen shall have a char length of 25.4±0.5 cm. (10±0.2 in.). (c) Details of the number of specimens which must meet the above test criteria for unit acceptance is specified in § 1616.4.

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