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LIST OF ANNEXESU.K.

ANNEX IVTEST TO DETERMINE THE HORIZONTAL BURNING RATE OF MATERIALS

1. Principle U.K.

A sample is held horizontally in a U-shaped holder and is exposed to the action of a defined low-energy flame for 15 seconds in a combustion chamber, the flame acting on the free end of the sample. The test determines if and when the flame extinguishes or the time in which the flame passes a measured distance.