22. GRSP resumed discussion on this subject on the basis of a revised proposal of Germany (ECE/TRANS/WP.29/GRSP/2018/5) on how to secure a cab mounted on a vehicle on the test rig that allowed the use of rigid composite blocks and/or metal brackets instead of the wooden blocks, and on the necessity to secure the vehicle with ropes or chains for test C. GRSP adopted the proposal not amended and requested the secretariat to submit ECE/TRANS/WP.29/GRSP/2018/5 as draft Supplement 4 to the 03 series of amendments to UN Regulation No. 29 for consideration and vote at the November 2018 sessions of WP.29 and AC.1. GRSP was informed about an issue raised during at the February 2018 session of Working Party on Brakes and Running Gears about road accidents involving trucks that point to the mechanical failure of the steering gear. The expert from Germany clarified that UN Regulation No. 29 did not include the steering gear mechanism in its testing provisions.

20. GRSP agreed (ECE/TRANS/WP.29/GRSP/2017/26) on how to secure a cab mounted on a vehicle on the test rig allowing the use of rigid composite blocks and/or metal brackets instead of the wooden blocks (Annex 3, Appendix 1, para. 1), and on the necessity to secure the vehicle with ropes or chains for test C. The expert from Germany introduced GRSP-62-11 on tolerance for the position of the loading device during the test. GRSP agreed in principle with GRSP-62-11, to combine both documents and to resume discussion at the May 2018 session of GRSP to allow for any further provisions. The secretariat was requested to distribute GRSP-62-11 with an official symbol at the next session of GRSP.