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| Document Title | Proposed Terms of Reference for a Special Interest Group on UN Regulation No. 90 | ||||||||
| Reference Number | GRRF-81-33 | ||||||||
| Date |
5 Feb 2016
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| Summary | Technical services have reported difficulties in interpreting the requirements and procedures incorporated in the 02 series of amendments to UN R90. Therefore, this submission proposes a special interest group to consider whether an informal working group may be needed to revised UN 92.02. | ||||||||
| Source(s) | Spain and IDIADA | ||||||||
| Rulemaking Area(s) | UN R90 Replacement Brake Components | ||||||||
| Proposal Status | Superseded | ||||||||
| Meeting(s) | |||||||||
| Downloads | |||||||||
| UNECE server | .pdf format | ||||||||
| Excerpts from session reports related to this document | |||||||||
| GRRF | Session 81 | 1-5 Feb 2016 |
28. The secretariat introduced GRRF-81-27 containing the request for clarifications of paragraph 5.2.2.1.1 in Regulation No. 90. Only one minimum shear strength requirement is specified for brake shoe assemblies and one requirement for brake pad assemblies in Regulation No. 90 and it is therefore requested that clarification be provided if these requirements are for both cold and hot shear because ISO 6312 specifies methods for both cold and hot shear tests. GRRF confirmed that Regulation No. 90 requested that the test, according to the mentioned ISO standard, has to be run at ambient temperature only. Several experts noted that a general review of Regulation No. 90 would be useful in order to minimize interpretation issues. Following discussions, the expert from Spain prepared and presented ToR for a SIG of experts to explore whether the issues related to the interpretation of the Regulation were minor and could be managed by GRRF or whether they are significant and would require the establishment of a specific IWG. GRRF agreed with the proposal and endorsed GRRF-81-33. |
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