Document ID: chunk:federal_register_of_legislation:F2019C00042:front:0:p30
Version: federal_register_of_legislation:F2019C00042
Segment Type: other
Provision Reference: 
Character Range: 82503–85083

shall be gripped between the clamps of a tensile‑testing machine. The clamps shall be so designed as to avoid breakage of the strap at or near them. The speed of traverse shall be about 100 mm/min. The free length of the specimen between the clamps of the machine at the start of the test shall be 200 mm + 40 mm.

         7.4.2.3. The tension shall be increased until the strap breaks, and the breaking load shall be noted.

         7.4.2.4. If the strap slips or breaks at or within 10 mm of either of the clamps the test shall be invalid and a new test shall be carried out on another specimen.

         7.4.3. Width under load

         7.4.3.1. The test shall be carried out each time on two new samples of strap, of sufficient length conditioned in conformity with the provisions of paragraph 7.4.1.

         7.4.3.2. Each strap shall be gripped between the clamps of a tensile-testing machine. The clamps shall be so designed as to avoid breaking of the strap at or near them. The speed of traverse shall be about 100 mm/min. The free length of the specimen between the clamps of the machine at the start of the test shall be 200 mm ± 40 mm.

         7.4.3.3. When the load reaches 980 daN + 100 - 0 daN, the machine shall be stopped and the measurement shall be completed within 5 seconds. The test has do be performed separately from the tensile test.

         7.5. Test of belt assembly components incorporating rigid parts

         7.5.1. The buckle and the adjusting device shall be connected to the tensile‑testing apparatus by the parts of the belt assembly to which they are normally attached, and the load shall then build up to 980 daN.

          In the case of harness belts, the buckle shall be connected to the testing apparatus by the straps which are attached to the buckle and the tongue or two tongues located in an approximately symmetrical way to the geometric centre of the buckle. If the buckle, or the adjusting device, is part of the attachment or of the common part of a three‑point belt, the buckle or adjusting device shall be tested with the attachment, in conformity with paragraph 7.5.2. below, except in the case of retractors having a pulley or strap guide at the upper belt anchorage, when the load will be 980 daN and the length of strap remaining wound on the reel shall be the length resulting from locking as close as possible to 450 mm from the end of the strap.

         7.5.2. The attachments and any belt adjustment devices for height shall be tested in the manner indicated in paragraph 7.5.1., but the load shall be 1,470