This agenda item relates to UN R55 Mechanical Couplings.
Working Party on Brakes and Running Gear | Session 79 | 16-20 Feb 2015

18. The Chair of the IWG on Regulation No. 55 introduced ECE/TRANS/WP.29/GRRF/2015/14, partially addressing the mandate defined in the terms of reference to the group. He announced that further work would be necessary to deliver the remaining items expected. The Chair of GRRF agreed to inform WP.29 about the necessity to extend the mandate duration of the group. The proposal received some comments. The Chair of the IWG volunteered to prepare a revised proposal for the September 2015 session of GRRF.

Working Party on Brakes and Running Gear | Session 80 | 15-18 Sep 2015

17. The Chair of the IWG on Regulation No. 55 introduced ECE/TRANS/WP.29/GRRF/2015/34, ECE/TRANS/WP.29/GRRF/2015/35, and ECE/TRANS/WP.29/GRRF/2015/36 presenting the outcome of the work done by the group and taking into account the comments received at the previous sessions of GRRF.

18. GRRF adopted the proposals, as reproduced Annex III (based on GRRF-80-41) to the session report and requested the secretariat to submit them to WP.29 and AC.1 for consideration at their March 2016 sessions, as Supplement 5 to the 01 series of amendments to Regulation No. 55.

Informal Group on Amendments to UN R55.01 | Session 9 | 26-27 Mar 2015
Informal Group on Amendments to UN R55.01 | Session 10 | 25-26 Jun 2015

Comments on the working documents submitted for the 80th session of GRRF

The deadline for the submission was at the 19th of June 2015.

The first document submitted was R55-10-02 about redefinition of Class S. The secretary commented that a small change was made in relation to the agreement at the 9th meeting of the working group. That was to include the class W that most likely will be approved during the 80th session of GRRF. This document was accepted by the working group without any changes.

The second document submitted was document R55-10-10. Concerning the proposal number 3 within the document R55-10-10 the working group had some comments on the distinction between hinged and rigid drawbars. This is not clear in the table 4. Hence the table was changed such that the row in the table that concerns drawbars was split into two rows. There is one for rigid drawbars and one for hinged drawbars. Furthermore a new column was added to handle the characteristic value Av. Through these changes the footnote to table 4 becomes obsolete. Hence it is removed. The changes are documented in the document R55-10-17. Furthermore it was observed in the fourth proposal within the working document that the definition of class W was unnecessary restricted to clevis type couplings. It shall be applicable to drawbar couplings in general. Hence the words “clevis type” were stricken out. This change was also documented in the document R55-10-17.

Documentation
GRRF-80-29 | Proposal for a Supplement to the 01 series of amendments to Regulation No. 55 (EC)
GRRF-80-41 | Consolidated revision of document GRRF/2015/35 including amendments as agreed by GRRF
GRRF/2015/34 | Proposal for Supplement 5 to the 01 series of amendments to Regulation No. 55
GRRF/2015/35 | Proposal for amendments to Regulation No. 55
GRRF/2015/36 | Proposal for Supplement [5] to the 01 series of amendments to Regulation No. 55