Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p20
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 20/43)
Character Range: 197275–200107

is involved.
              3.2. Number of test pieces

 Eight flat samples measuring 300 mm x 300 mm, specially made or cut from the flattest part of a pane shall be tested
              3.2.1. Test pieces can alternatively be finished products that may be supported over the apparatus described in paragraphs 2.1.1. to 2.1.1.3. of Annex 3.
3.2.2.  If the test pieces are curved, care should be taken to ensure adequate contact with the support.
3.3. Test method
3.3.1. The method used shall be that described in Annex 3, paragraph 2.1.
3.3.2.  The height of drop from the underface of the ball to the upper face of the test piece or sample shall be 9 m  mm.
              3.4. Interpretation of results

              3.4.1.  The test shall be considered to have given a satisfactory result if the following conditions are met:

               (a) The ball does not pass through the test piece;

               (b) The laminate shall not break into separate pieces;

                   (c) At the point immediately opposite the point of impact, small fragments of glass may leave the specimen, but the small area thus affected shall expose less than 645 mm² of reinforcing or strengthening material, the surface of which shall always be well covered with tiny particles of tightly adhering glass. Total separation of glass from the reinforcing or strengthening material shall not exceed 1,935 mm² on either side. Spalling of the outer glass surface opposite the point of impact and adjacent to the area of impact is not to be considered a failure.

3.4.2. A set of test pieces submitted for approval shall be considered satisfactory               from the point of view of the mechanical strength test if at least six of the eight tests have given a satisfactory result.
4. Test of resistance to the environment
4.1. Test of resistance to abrasion
4.1.1. Indices of difficulty and test method
 The requirements of Annex 3, paragraph 4., shall apply, the test being continued for 1,000 cycles.
4.1.2. Interpretation of results
 The safety-glass pane shall be considered satisfactory from the point of view of abrasion resistance if the light scatter as a result of abrasion of the test piece does not exceed 2 per cent.
4.2. Test of resistance to high temperature
 The requirements of Annex 3, paragraph 5., shall apply.
4.3. Resistance-to-radiation test
4.3.1. 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.
4.3.2. Number of samples or 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.,