Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p13
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 13/43)
Character Range: 179292–182202

the dimension
(1,100 mm x 500 mm)           mm shall be subjected to testing.
3.3. Test method
3.3.1. The method used shall be that described in Annex 3, paragraph 3.1.
3.3.2. The height of drop shall be 1.5 m.         mm.
3.4. Interpretation of results
3.4.1. The test shall be deemed to have given a satisfactory result if the windscreen or the test piece is fractured.
3.4.2. A set of test pieces submitted for approval shall be considered satisfactory from the point of view of the headform test if either of the two following conditions is fulfilled, that is to say if:
3.4.2.1. All the tests have given a satisfactory result;
3.4.2.2. One test having given an unsatisfactory result, a further series of tests carried out on a new set of test pieces has given satisfactory results.
4. Optical qualities
 The requirements concerning optical qualities set out in Annex 3, paragraph 9., shall apply to every type of windscreen.

Annex 5
  Uniformly-toughened glass panes[*]
1. Definition of type
 Uniformly-toughened glass panes 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 nature of the toughening process (thermal or chemical);
1.1.3. The shape category; two categories are distinguished:
1.1.3.1. Flat glass panes,
1.1.3.2. Flat and curved glass panes.
1.1.4. The thickness category in which the nominal thickness 'e' lies (a manufacturing tolerance of ±0.2 mm being allowed):
 Category I                 e  3.5 mm
 Category II 3.5 mm < e  4.5 mm
 Category III 4.5 mm < e  6.5 mm
 Category IV 6.5 mm < e
1.2. The secondary characteristics are as follows:
1.2.1. Nature of the material (polished (plate) glass, float glass, sheet glass);
1.2.2. Colouring (colourless or tinted);
1.2.3. The incorporation or otherwise of conductors.
1.2.4. The incorporation or otherwise of opaque obscuration.
2. Fragmentation test
2.1. Indices of difficulty of the secondary characteristics
        Material             Index of difficulty
        Plate glass          2
        Float glass          1
        Sheet glass          1

 No other secondary characteristics are involved.
2.2. Selection of test pieces
2.2.1. Test pieces of each shape category and of each thickness category difficult to produce shall be selected according to the following criteria for testing.
2.2.1.1. In the case of flat glass panes, two sets of test pieces shall be provided, corresponding to:
2.2.1.1.1. The largest developed area,
2.2.1.1.2. The smallest angle between two adjacent sides.
2.2.1.2. In the case of flat and curved glass panes, three sets of samples shall be provided, corresponding to:
2.2.1.2.1. The largest developed area,
2.2.1.2.2. The smallest angle between two adjacent sides,
2.2.1.2.3. The largest height of segment.
2.2.2.