ASME RT-1:2015 pdf free download

ASME RT-1:2015 pdf free download.Safety Standard for Structural Requirements for Light Rail Vehicles.
3 INTEROPERABIUTY
section covers geometric compatibility and crush mechanism design con derations For different vehicles operating on the same routes of the subject transit system.
3.1 Anticlimber and Coupler Interface
Each light rail vehicle shall incorporate an anticlimber at each end of the vehicle. The height and design of the anticlimber and coupler on new light rail vehicles shall be compatible with existing light rail vehicles that are operated on the same mutes of the customer’s transit system. The anticlimber shall be designed for engagernent between vehicles to mitigate override or telescoping in a collision, including any condition of failed or deflated suspension elements. In the event of a collision with another rail vehicle, the coupler system shall include a feature that will permit engagement of anticlimbers. See section 6 for additional requirements.
Design of the vehicle leading end structure shall not interfere with proper engagement or operation of the vehicle anticlimber system.
3.2 LRV and Streetcar Leading End Design for Protection of Street Vehicles
For light rail vehicles and streetcars operating in urban environments sharing roadways and crossings. the design of the leading end of the carbody shall incorporate a contoured geometry shape extending across the width of the vehicle, enclosing open area spaces to encourage deflection of struck objects from the path of the L.RV/streetcar and to minimize entrapment, override, and penetration of automobiles and light trucks. Sharp corners and protruding shapes of the contoured geometry design shall be minimized. A bumper, coupler cnckisure pilot beam, skirting and/or alternative structures may be used to achieve thesc objectives.
The bottom of the car end stnicturvs as described in the previous paragraph. with nominal floor height conditions, shall not be greater than the larger of 250mm (10 in.) above the top of rail or the minimum allowable by the dynamic operating envelope.
The leading end design shall take into account collision compatibility with automotive construction.
4.1 Welding
Design of welded stnictures shall be in accordance wit]’. AWS D1.1/DL IM fcw steel and AWS DL2/D1.2M for aluminum, or equivalent.
4.2 Artlcubtion
The articulation %hall include structure to meet the requ.rements of section 5.
4.3 Design Parameter Tolerances
The allowable stresses for the loads specified in section 5 shall consider the limiting cases of dimensional tolerances, manufacturing processes, workmanship, and other manufacturing conditions,
4.4 DemonstratIon of Strength and Structural Stability
It shall be demonstrated by analysis (section 9) and/or tests (section 10) that the requirements of section 5 are achieved.