Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p4
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 4/43)
Character Range: 157452–159977

the given size, the following minimum dimensions shall be observed:
(a) For samples having a width of 3 to 60 mm, the length shall be 356 mm. In this case the material is tested over the product's width;
(b) For samples having a width of 60 to 100 mm, the length shall be at least 138 mm. In this case the potential burning distance corresponds to the length of the sample, the measurement starting at the first measuring point;
(c) Samples less than 60 mm wide and less than 356 mm long, and samples 60 to 100 mm wide and less than 138 mm long, cannot be tested according to the present method, nor can samples less than 3 mm wide.

Figure 20

Sample

10.5.2. Sampling
 At least five samples shall be taken from the material under test. In materials having burning rates differing according to the direction of the material (this being established by preliminary tests) the five (or more) samples shall be taken and be placed in the test apparatus in such a way that the highest burning rate will be measured.
 When the material is supplied in set widths, a length of at least 500 mm covering the entire width shall be cut. From the piece so cut, the samples shall be taken at not less than 100 mm from the edge of the material and at points equidistant from each other.
 Samples shall be taken in the same way from finished products when the shape of the product so permits. If the thickness of the product is over 13 mm it shall be reduced to 13 mm by a mechanical process applied to the side which does not face the passenger compartment.
 Composite materials (see paragraph 10.2.2.) shall be tested as if they were homogeneous.
 In the case of materials comprising superimposed layers of different composition which are not composite materials, all the layers of material included within a depth of 13 mm from the surface facing towards the passenger compartment shall be tested individually.
10.5.3. Conditioning
 The samples shall be conditioned for at least 24 hours, but not more than 7 days, at a temperature of 23 °C ± 2 °C and a relative humidity of 50 ± 5 per cent, and shall be maintained under these conditions until immediately prior to testing.
10.6. Procedure
10.6.1. Place samples with napped or tufted surfaces on a flat surface, and comb twice against the nap using the comb (paragraph 10.4.5.).
10.6.2. So place the sample in the sample holder (paragraph 10.4.2.) that the exposed side faces downwards, towards the flame.
10.6.3. Adjust the gas flame to a height of 38 mm using the mark in the chamber,