ASME RT 1 2020

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ASME RT-1 – 2020 Safety Standard for Structural Requirements for Light Rail Vehicles and Streetcars

Published By	Publication Date	Number of Pages
ASME	2020

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Category: ASME

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Description

RT-1 applies to car bodies for newly constructed light-rail vehicles and streetcars for transit passenger service. RT-1 defines requirements for the incorporation of passive safety design concepts related to the performance of the car body of light-rail vehicles in conditions such as collisions, so as to enhance occupant safety and control damage. RT-1 joins with RT-2-2014 Safety Standard for Structural Requirements for Heavy Rail Transit Vehicles, to serve as the first standards of their kind for North America. The result is a pair of uniform standards suitable for adoption by all levels of domestic jurisdiction, while providing state-of-the-art guidelines for other nations considering car body standards for their rail-transit systems. Both Standards are also unique for utilizing Crash Energy Management (CEM) protocols. CEM represents the latest best-practices of design, testing, analysis and manufacture—enhancing crashworthiness by assigning certain sections of the carbody the task of absorbing a portion of the energy of collision by crushing in a controlled manner. Proper application of CEM preserves occupant volume, while minimizing the consequences of occupant impacts with the vehicle interior. Production efficiencies may also be realized via CEM, although heightening passenger safety is the main intent. Intended for rail-transit carbody manufacturers and their suppliers of components and raw materials, as well as the owners and operators of rail-transit systems, plus all potential governing entities.

PDF Catalog

PDF Pages	PDF Title
4	CONTENTS
5	Foreword
6	ASME RTV COMMITTEE ROSTER
7	CORRESPONDENCE WITH THE RTV COMMITTEE
9	INTRODUCTION
10	1 SCOPE 1.1 Subjects Not Addressed by This Standard 1.2 Effective Date 2 DEFINITIONS
12	3 INTEROPERABILITY 3.1 Anticlimber and Coupler Interface 3.2 LRV and Streetcar Leading End Design for Protection of Street Vehicles 4 STRUCTURAL REQUIREMENTS
13	4.1 Welding 4.2 Articulation 4.3 Design Parameter Tolerances 4.4 Demonstration of Strength and Structural Stability 4.5 Truck-to-Carbody Attachment 4.6 Crashworthiness 5 DESIGN LOADS AND ASSESSMENT CRITERIA
14	Tables Table 4-1 Structural Load Requirements for Light Rail Vehicles
17	Table 4-2 Structural Load Requirements for Streetcars
19	Table 4.6-1 Crashworthiness for Light Rail Vehicles
20	6 COUPLER SYSTEM 6.1 Characteristics 7 STRUCTURAL MATERIALS Table 4.6-2 Crashworthiness for Streetcars
21	7.1 Austenitic Stainless Steel 7.2 Low-Alloy High Tensile Steel 7.3 Aluminum 7.4 Nonmetallic Materials 8 CRASH ENERGY MANAGEMENT (CEM) 9 ANALYSIS 9.1 Structural Illustrations 9.2 Stress Analysis
22	9.3 Crashworthiness Analysis
23	10 TESTS 10.1 Objectives 10.2 General 10.3 Proof Load Tests
25	10.4 Crash Energy Management Tests 10.5 Coupler Impact Tests 11 REFERENCES

Additional information

Standard Title	ASME RT-1 – 2020 Safety Standard for Structural Requirements for Light Rail Vehicles and Streetcars
Published Code	ASME
Publication Date	2020

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ASME RT 1 2020

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