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A roll cage is a specially engineered and constructed frame built in (or sometimes around, in which case it is known as an exo cage) the passenger compartment of a vehicle to protect its occupants from being injured or killed in an accident, particularly in the event of a
There are many different roll cage designs depending on the application, hence different racing organizations have differing specifications and regulations, although most of these organizations harmonize their regulations with those of the FIA.
Roll cages help to stiffen the
File:Atkinson WRC Impreza in shop.jpg, A racecar bodyshell with integrated roll cage
File:2010 Porsche 997 GT3 RS 3.8 red roll cage.jpg, Roll cage in a Porsche 997 GT3 RS.
File:RacecarRollcage2003.jpg, A race car stripped down to its roll cage and fire walls
A roll cage is a specially engineered and constructed frame built in (or sometimes around, in which case it is known as an exo cage) the passenger compartment of a vehicle to protect its occupants from being injured or killed in an accident, particularly in the event of a rollover
Rollover or roll over may refer to:
Arts and entertainment
* ''Rollover'' (film), a 1981 American political thriller
*''Roll Over'', a 1992 album by Hound Dog
* "Roll Over", a 2006 song by Zico Chain
* "Roll Over", a 1989 song by Steven Wayne ...
.
Designs
There are many different roll cage designs depending on the application, hence different racing organizations have differing specifications and regulations, although most of these organizations harmonize their regulations with those of the FIA.
Roll cages help to stiffen the chassis
A chassis (, ; plural ''chassis'' from French châssis ) is the load-bearing framework of an artificial object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart ...
, which is desirable in racing applications. Racing cages are typically either bolt-in or welded-in, with the former being easier and cheaper to fit while the latter is stronger.
A roll bar is a single bar behind the driver that provides moderate rollover protection. Due to the lack of a protective top, some modern convertibles utilize a strong windscreen frame acting as a roll bar. Also, a roll hoop may be placed behind both headrests (usually one on older cars), which is essentially a roll bar spanning the width of a passenger's shoulders.
Road cars
A newer form of rollover protection, pioneered on the Mercedes-Benz R129 in 1989, is deployable roll hoops that are normally hidden within the body of a car. When sensors detect an imminent rollover, the roll hoops quickly extend and lock in place. Cars that have a deployable rollover protection system include the Peugeot 307 CC, Volvo C70,Mercedes-Benz SL 500
The Mercedes-Benz SL-Class (marketed as Mercedes-AMG SL since 2022) is a grand touring sports car manufactured by Mercedes-Benz since 1954. The designation ''SL'' derives from the German ''Sport-Leicht'' (English: Sport Light).
Initially, the f ...
, Jaguar XK, and the Lamborghini Reventón Roadster.
Other applications
Roll bars are also used historically on row crop tractors, and roll cages are common as part of the cab on modern tractors.See also
* Active rollover protection * Rollover protection structureReferences
External links
{{commons category, Roll cages Vehicle safety technologies