ASME RT-1 pdf free download

ASME RT-1-2015 pdf free download.Safety Standard for Structural Requirements for Light Rail Vehicles.
carbody: the vehicle body comprising its main load-carrying structure above all truck suspension units. It includes all components and structural articulation parts, if any, that are connected to this structure and contribute directly to its strength, stiffness, and stability. Mechanical or electrical equipment and other mounted parts are not considered part of the carbody, though their attachment brackets are. The “coupler’s ends of the carbody are the outside vehicle ends that contain the means for coupling to another vehicle. The “intermediate” ends, if any, contain the articulation system.
closing speed: the speed of a vehicle relative to another object or vehicle at the time of initial impact.
collision posts: a set of two structural posts located at each end of the carbody, extending from the bottom of the underirame structure up to the structural shelf. Collision posts can be made of several structural members assembled to each other, provided that the required performance is met. They are located at the approximate one-third points across the width of the ehicle, and are forward of the seating position of any passenger or crew person. An alternative to collision posts is the use of a collision wall.
collision wall: a structure at the leading end of the ehide spanning the area between the structural shelf, corner posts, and top of the underframe.
consist: the makeup or composition of the individual units of a train, generally by number of cars and type of vehicle.
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 underframc structure up to the roof at the top of the side frame at its intersection with the roof.
coupler s stem: a system comprised of the coupler head, drawbar, draft gear, and attachments to the carbody, permitting the connection betweefl light rail vehicles or streetcars.
crash energy management (CEM): a method of design and manufacture of vehicle structures that enhances crashworthiness by assigning certain sections of the carbody the task of absorbing a portion of the collision energy by crushing in a controlled manner (see structural energy absorption zone). The controlled crushing and energy absorption functions are typically assigned to special carbody structural members in the structural energy absorption zone that are designed to crush in a predictable and stable manner over a distance that depends on the design of the member and the desired amount of energy absorption.
crashworthiness: the ability of a carbody to manage the collision energy while maintaining structural integrity and limiting the level of acceleration, so as to minimize casualties to occupants and pedestrians and damage to other vehicles.
end frame: structure inboard of the extreme ends of the vehicle supporting the anticlimber, corner posts, and collision posts.
end sill compression load (buff load): longitudinal corn pressive force applied at the ends of the vehicle, usually at the anticlimber.
light rail ri’hicle (LRV): LRVs operate on a light rail transit system, and are not part of main-line railroads. Light rail vehicles are capable of boarding and discharging passengers at track/street level or elevated 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.)
permanent deformation: for the purpose of design, permanent deformation is a condition resulting from a stress greater than the minimum yield strength of the material, or where the material has deformed to the extent that it will not return to its original shape or position after the load is released. Similarly, when testing a structure, permanent deformation is characterized by a loading condition resulting from physical stress greater than the yield strength of the material, or where there is evidence that the material has deformed to such an extent that it will not return to its original shape or position after loading is removed.
streetcar a category of L.RV that operates mainly at street level in road traffic, normally as single units or two units per train and at a maximum speed of 70km/h (44 mph). Vehicles are typically smaller, lighter, and narrower in width than light rail vehicles.ASME RT-1 pdf download.