ASME RT-1:2020 pdf free download

ASME RT-1:2020 pdf free download.Safety Standard for Structural Requirements for Light RailVehicles and Streetcars.
corner posts: a set of two full-height structural posts located at or near the two corners at one end of the carbody. extending from the bottom of the underframe structure up to the roof structure. Corner posts can be an assembly of several structural members assembled to each other provided that the required performance is met.
coupler system: a system that comprises the coupler head, drawbar, draft gear, and attachments to the carbody, permitting the connection between light rail vehicles or streetcars. The coupler system may be permanently extended in position. or of the folding/retractable type often stored behind a frangible cover or energy absorbing bumper system.
crash energy management (CEM): a method of design and manufacture of vehicles that enhances crashworthiness by assigning certain structural members or components of the carbody and the coupler system the task o absorbing a portion of the collision energy in a controlled manner (see energy absorption zone).
crashworthiness: capability of a vehicle structure to protect occupants from injury or fatality in the event of a collision between trains or between trains and obstacles.
end frame: structure inboard of the extreme ends of the vehicle that typically supports the corner posts, collision posts, or collision wall.
endsill compression load (buff load): longitudinal compressive force applied at the ends of the carbody.
energy absorption zone: a zone, typically located at the ends of the vehicle, designed for controlled deformation or crush, while the integrity of the remaining structure outside this zone is maintained.
light rail vehicle (LRV): vehicle that operates on a light rail transit system and is not part of mainline railroads. Light rail vehicles are capable of boarding and discharging passengers at track/street level or elevated curbs and platforms. The light rail vehicle is a mode of rail transit characterized by its ability to operate on exclusive rights-of-way, shared street running, and through roadway grade crossings (see also streetcar).
occupied volume: the volume of the light rail vehicle or streetcar where passengers or crewmembers are normally located during service operation, such as the operating cab and passenger seating and standing areas. The entire width of a vehicles end compartment that contains a control stand is an occupied volume. An articulation or gangway Is typically not considered occupied unless there are seats.
override: the behavior of end-to-end colliding vehicles such that one vehicle vertically rides above the other resulting in unintended crush deformations. Overriding can lead to telescoping intrusion of car-modules.
streetcar: a category of transit vehicle similar to LRV that operates mainly at Street level in road traffic, typically operating up to a maximum speed of 70 km/h (44 mph).
structural sheathing: the parts of the exterior covering of the carbody that are used as structural components of the vehicle and included in the stress analysis.
structural shel! the structural member in the end frame that spans the full width of the carbody and is attached to the collision posts and corner posts below the window sill, which is designed to transmit the collision post reaction loads to the carbody sides.
survival volume: the portion of the occupied volume that shall be preserved during the collision.
telescoping: the intrusion of one vehicle Into another in a collision.
train: one or more vehicles coupled together.
ultimate strength: the maximum load-carrying capability of a structure for a load applied at a specified location and direction. For further deformation of the structure, the load capable of being supported will be less than this maximum load.
vehicle: a complete light rail vehicle or streetcar that contains all the minimum system requirements for operation. The vehicle may comprise multiple car-modules that are connected by articulation joints, allowing passage of passengers between the car-modules while in service.