Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p15
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 15/43)
Character Range: 184354–187192

given a satisfactory result if fragmentation satisfies the following conditions:

              2.6.1.1. The number of fragments in any 5 cm x 5 cm square is not less than 40.

              2.6.1.2. For the purposes of the above rule, a fragment extending across a side of a square shall count as half a fragment.

              2.6.1.3. Fragmentation shall not be checked in a strip 2 cm wide round the edge of the samples, this strip representing the frame of the glass; nor within a radius of 7.5 cm from the point of impact.

              2.6.1.4. When a fragment extends beyond the excluded area only the part of the fragment falling outside of the area shall be assessed.

              2.6.1.5. Fragments of an area exceeding 3 cm2 shall not be allowed except in the parts defined in paragraph 2.6.1.3. above.

              2.6.1.6. No fragment longer than 100 mm in length shall be allowed except in the areas defined in paragraph 2.6.1.3. above provided that:

              2.6.1.6.1. Fragment ends do not converge to a point.

              2.6.1.6.2. If they extend to the edge of the pane they do not form an angle of more  than 45° to it.

2.6.2. A set of test pieces submitted for approval shall be considered satisfactory               from the point of view of fragmentation if at least three of the four tests carried out at each of the points of impact prescribed in paragraph 2.5.1. above have given a satisfactory result.
2.6.3. If the above-mentioned deviations are found, they shall be noted in the test report and permanent recording(s) of the fragmentation pattern of the relevant parts of the glass pane shall be attached to the report.
3. Mechanical strength test
3.1. 227 g ball test
3.1.1. Indices of difficulty of the secondary characteristics.
Material        Index of difficulty  Colouring   Index of difficulty
Polished glass  2                    colourless  1
Float glass     1                    tinted      2
Sheet glass     1

The other secondary characteristic (namely, incorporation or otherwise of conductors) is not involved.
3.1.2. Number of test pieces
 Six test pieces shall be subjected to testing for each thickness category defined in paragraph 1.1.4. above.
3.1.3. Test method
3.1.3.1. The test method used shall be that described in Annex 3, paragraph 2.1.
3.1.3.2. The height of drop (from the underface of the ball to the upper surface of the test piece) shall be 2.0 m  mm.

3.1.4. Interpretation of results
3.1.4.1. The test shall be deemed to have given a satisfactory result if at least five of the test pieces do not break.
4. Optical qualities
4.1. The provisions concerning regular light transmittance set out in Annex 3, paragraph 9.1., shall apply to uniformly-toughened glass panes or parts of glass panes located at places which are essential to the driver's vision.
4.2.