Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p21
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 21/43)
Character Range: 199831–202723

test pieces
 The requirements of Annex 3, paragraph 6.3., shall apply.
4.4. Resistance-to-humidity test
 The requirements of Annex 3, paragraph 7., shall apply.
5. Optical qualities
 The provisions concerning the regular light transmittance set out in Annex 3, paragraph 9.1., shall apply to glass panes, or parts of glass panes located at places which are essential to the driver's vision.
Annex 8
  Treated laminated-glass windscreens
1. Definition of type
 Treated laminated-glass windscreens shall be deemed to belong to different types if they differ in at least one of the following principal or secondary characteristics.
1.1. The principal characteristics are as follows:
1.1.1. The trade names or marks.
1.1.2. The shape and dimensions
 Treated laminated glass windscreens shall be deemed to belong to one group for the purposes of tests of fragmentation, of mechanical properties and of resistance to the environment.
1.1.3. The number of layers of glass,
1.1.4. The nominal thickness 'e' of the windscreen, a manufacturing tolerance of
0.2 . n mm ('n' being the number of layers of glass in the windscreen) above and below the nominal value being allowed,
1.1.5. Any special treatment which one or more layers of glass may have undergone,
1.1.6. The nominal thickness of the interlayer or interlayers,
1.1.7. The nature and type of the interlayer or interlayers (e.g. PVB or other plastics-material interlayer or interlayers).
1.2. The secondary characteristics are as follows:
1.2.1. The nature of the material (polished (plate) glass, float glass, sheet glass),
1.2.2. The colouring (total or partial) of the interlayer or interlayers (colourless or tinted),
1.2.3. The colouring of the glass (colourless or tinted),
1.2.4. The incorporation or otherwise of conductors,
1.2.5. The incorporation or otherwise of opaque obscuration.
2. General
2.1. In the case of treated laminated-glass windscreens, tests other than the headform test on a complete windscreen and tests of optical qualities shall be conducted on samples and/or flat test pieces which are specially made for the purpose. However, the test pieces shall be in all respects rigorously representative of the serially-produced windscreens for which approval is sought.
2.2. Before each test, the test pieces or samples shall be stored for not less than four hours at a temperature of 23 °C ± 2 °C. The tests shall take place as soon as possible after the test pieces or samples have been taken out of the receptacle in which they were stored.
3. Tests prescribed
 Treated laminated glass windscreens shall be subjected to:
3.1. The tests prescribed in Annex 6 for ordinary laminated-glass windscreens,
3.2. The fragmentation test described in paragraph 4. below.
4. Fragmentation test
4.1. Indices of difficulty of the secondary characteristics
Material     Index of difficulty
Plate glass  2
Float glass  1
Sheet glass