Motor vehicle chassis with its suspension, exhaust system, and steering box

A chassis (play /ˈʃæsi/ or /ˈæsi/; plural: "chassis") consists of an internal framework that supports a man-made object. It is analogous to an animal's skeleton. An example of a chassis is the underpart of a motor vehicle, consisting of the frame (on which the body is mounted) with the wheels and machinery.


Examples of use


1950s Jeep FC cowl and chassis for others to convert into finished vehicles

In the case of vehicles, the term chassis means the frame plus the "running gear" like engine, transmission, driveshaft, differential, and suspension. A body (sometimes referred to as "coachwork"), which is usually not necessary for integrity of the structure, is built on the chassis to complete the vehicle. For commercial vehicles chassis consists of an assembly of all the essential parts of a truck (without the body) to be ready for operation on the road.[1] The design of a pleasure car chassis will be different than one for commercial vehicles because of the heavier loads and constant work use.[2] Commercial vehicle manufacturers sell “chassis only”, “cowl and chassis”, as well as "chassis cab" versions that can be outfitted with specialized bodies. These include motor homes, fire engines, ambulances, box trucks, etc.

In particular applications, such as school busses, a government agency like National Highway Traffic Safety Administration (NHTSA) in the U.S. defines the design standards of chassis and body conversions.[3]

An armoured fighting vehicle's chassis comprises the bottom part of the AFV that includes the tracks, engine, driver's seat, and crew compartment. This describes the lower hull, although common usage of might include the upper hull to mean the AFV without the turret. A chassis serves as basis for platforms on tanks, armored personnel carriers, combat engineering vehicles, etc.


PowerMac G4 chassis opened to expose computer components

A chassis in a television, radio, or other electronic device consists of the metal frame on which the circuit boards and other electronics are mounted.[4]

In the absence of a metal frame the chassis refers to the circuit boards and components themselves, not the physical structure.

In computers, the chassis refers to the rigid framework on to which the motherboard, memory, disk drives, and other equipment are mounted. It also supports the shell-like case: the housing that protects all of the vital internal equipment from dust, moisture, and tampering. The term "case modding" refers to the artistic styling of otherwise rather functional and plain computer encasings.

Main articles: computer case for personal machines or rack mount for commercial grade servers.

See also


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Look at other dictionaries:

  • châssis — [ ʃasi ] n. m. • XIIe; de châsse 1 ♦ Cadre destiné à maintenir en place les éléments d une surface (planches, vitres, tissu, papier...). ⇒ 2. bâti, cadre , charpente. 2 ♦ Encadrement d une ouverture ou d un vitrage; vitrage encadré. Châssis de… …   Encyclopédie Universelle

  • châssis — CHÂSSIS. s. mas. Ouvrage de menuiserie composé de plusieurs pièces qui forment ordinairement des carrés où l on met des vitrages ou de la toile, ou des feuilles de papier huilé, pour empècher le vent, les injures du temps. Châssis de papier.… …   Dictionnaire de l'Académie Française 1798

  • Chassis — Châssis Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom …   Wikipédia en Français

  • chassis — Chassis. s. m. Pieces de bois jointes ensemble, ouvrage de menuiserie qui a plusieurs quarrez où l on met des pieces de verre ou de toile, ou des fueilles de papier huilé, pour empescher le vent, les injures du temps. Chassis de papier. chassis… …   Dictionnaire de l'Académie française

  • Chassis — Sn Fahrgestell per. Wortschatz fach. (18. Jh.) Entlehnung. Entlehnt aus frz. châssis, zu frz. châsse Kästchen, Fassung, Gestell , aus l. capsa Kasten, Kapsel .    Ebenso nndl. chassis, ne. chassis, nschw. chassi, nnorw. chassis. Zur Sippe des… …   Etymologisches Wörterbuch der deutschen sprache

  • chassis — [chas′ē, shas′ē] n. pl. chassis [chas′ēz, shas′ēz΄] [Fr châssis: see CHASE2] 1. a frame on which the carriage of a cannon moves back and forth 2. the part of a motor vehicle that includes the engine, the frame, suspension system, wheels, steering …   English World dictionary

  • chassis — (n.) base frame of an automobile, 1903, American English; earlier window frame (1660s), from Fr. chássis frame, O.Fr. chassiz (13c.) frame, framework, setting, from chasse case, box, eye socket, snail s shell, setting (of a jewel), from L. capsa… …   Etymology dictionary

  • chassis — s. m. 2 núm. O mesmo que chassi.   ‣ Etimologia: francês châssis …   Dicionário da Língua Portuguesa

  • Chassis — »Fahrgestell (bei Kraftfahrzeugen); Montagerahmen (z. B. von Rundfunkgeräten)«: Das Fremdwort wurde in der 1. Hälfte des 19. Jh.s anfangs im Kunsthandwerk aus frz. châssis »Einfassung, Rahmen« entlehnt. Seit Anfang des 20. Jh.s wird das Wort in… …   Das Herkunftswörterbuch

  • Chassis — Chas sis, n. [F. ch[^a]ssis.] (Mil.) 1. A traversing base frame, or movable railway, along which the carriage of a barbette or casemate gun moves backward and forward. [See {Gun carriage}.] [1913 Webster] 2. The under part of an automobile or… …   The Collaborative International Dictionary of English

  • Chassis — (fr., spr. Schassih), 1) (Bauk.), so v.w. Schößchen; 2) so v.w. Blendfenster; 3) (Kattundr.), so v.w. Bakken …   Pierer's Universal-Lexikon

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