Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p31
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 31/43)
Character Range: 226968–230041

to be measured.

              4.3.4. For glazing which do not have contact possibilities as well as for small windows in vehicles and for all windows in trailers (classification VIII/C) there will be no headform testing. A small window is a window into which a 150 mm diameter circle cannot be scribed.

              4.4. Interpretation of results

               The test shall be deemed to have given a satisfactory result if the following conditions are fulfilled:

              4.4.1. The test piece or sample is not penetrated nor shall it break into fully separate large pieces.

              4.4.2. The HIC value is less than 1,000.

              4.4.3. A set of test pieces submitted for approval shall be considered satisfactory from the point of view of the headform test if one of the following conditions is met:

              4.4.3.1. All the tests give satisfactory results, or

              4.4.3.2. One test having an unsatisfactory result, a further series of tests carried out on a new set of test pieces give satisfactory results.

              5. Mechanical strength test 227 g ball test

              5.1. Indices of difficulty of the secondary characteristics:

               1)  Without conductors or heating elements;

               2)  With conductors or heating elements.

              5.2. Number of test pieces

               Ten flat square pieces 300 mm +10/-0 mm or ten substantially flat finished parts shall be subjected to testing.

              5.3. Test method

              5.3.1. The method used shall be that prescribed in Annex 3, paragraph 2.1.

              5.3.2. The height of drop for the various thickness values is given in the table below:

Sheet thickness (mm)  Height of drop (m)
< 3                   2
   4                  3
   5                  4
> 6                   5

              For intermediate values of test piece thickness in the interval between 3 mm and 6 mm the height of drop shall be interpolated.

              5.4. Interpretation of results

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

               (a) The ball does not penetrate the test piece

               (b) The test piece does not break into separate pieces

               As a result of the impact, cracks and fissures in the sheet are however permissible.

              5.4.2. A set of test pieces submitted for approval shall be considered satisfactory from the point of view of the 227 g ball test if one of the following conditions is met:

              5.4.2.1. Eight or more separate tests give a satisfactory result at the drop height.

              5.4.2.2. Three or more tests having given an unsatisfactory result, a further series of tests carried out on a new set of test pieces gives satisfactory results.

              5.5. 227 g ball test at -18 °C ± 2 °C

              5.5.1. To minimize the temperature change of the test piece, the test shall be performed within 30 seconds of the removal of the test piece from