Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p18
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 18/43)
Character Range: 192021–195082

of test pieces
 Twenty square test pieces of 300 mm         mm side shall be subjected to testing.
4.3.3. Test method
4.3.3.1. The method used shall be that described in Annex 3, paragraph 2.1.
 Ten test pieces shall be tested at a temperature of +40 °C ± 2 °C and ten at a temperature of -20 °C ± 2 °C.
4.3.3.2. The height of drop for the various thickness categories and the mass of the detached fragments are given in the table below:
                                 +40 °C ± 2 °C    -20 °C ± 2 °C
Nominal thickness of test piece  Height of fall   Maximum permitted mass of the fragments   Height of fall (m)  Maximum permitted mass of the fragments
(mm)                             (m)              (g)                                                           (g)
e  4.5                          9                12                                        8.5                 12
4.5 < e  5.5                    9                15                                        8.5                 15
5.5 < e  6.5                    9                20                                        8.5                 20
e > 6.5                          9                25                                        8.5                 25

4.3.4. Interpretation of results
4.3.4.1. The test shall be considered to have given a satisfactory result if the following conditions are met:
- The ball does not pass through the test piece,
- The test piece does not break into several pieces,
- If the interlayer is not torn, the weight of fragments detached from the side of the glass opposite to the point of impact shall not exceed the appropriate values specified in paragraph 4.3.3.2. above.
4.3.4.2.  A set of test pieces submitted for approval shall be considered satisfactory from the point of view of the 227 g ball test if at least eight of the ten tests carried out at each temperature, have given a satisfactory result.
5. Test of resistance to the environment
5.1. Test of resistance to abrasion
5.1.1. Indices of difficulty and test method
 The requirements of Annex 3, paragraph 4., shall apply, the test being continued for 1,000 cycles.
5.1.2. Interpretation of results
 The safety-glass pane shall be considered satisfactory with respect to abrasion resistance if the light scatter as a result of abrasion of the test piece does not exceed 2 per cent.
5.2. Test of resistance to high temperature
 The requirements of Annex 3, paragraph 5., shall apply.
5.3. Resistance-to-radiation test
5.3.1. General requirement
 This test shall be performed only if the laboratory deems it useful in the light of the information in its possession concerning the interlayer.
5.3.2. The requirements of Annex 3, paragraph 6.3. shall apply.
5.4. Resistance-to-humidity test
 The requirements of Annex 3, paragraph 7., shall apply.
6. Optical qualities
 The requirements concerning optical qualities set out in Annex 3, paragraph 9., shall apply to every type of windscreen. This shall not apply to flat windscreens which fall within an already approved group if the rake angle