Roll cage

Roll cage

:"Roll bar redirects here. For the suspension component called a roll bar, see sway bar."

A roll cage is a specially constructed frame built in or around the cab of a vehicle to protect the occupants from being injured in an accident, particularly in the event of a roll-over. Roll cages are used in nearly all purpose-built racecars, and in most cars modified for racing. There are many different roll cage designs depending on the specifications of the sanctioning body. Roll cages are built to extend the frame in front of the driver, next to the A-pillar, to provide as much high-speed protection as possible in a coupé. This is compared to the protection provided in open wheel racing, where a solid shell encases the majority of the driver's body as well as a rollover hoop that extends over the driver's helmet. A roll cage can also do a great deal to stiffen the chassis, which is desirable in racing applications.

A roll bar is a single bar behind the driver that provides moderate roll-over protection. A targa top is a body style that integrates an externally-visible roll bar that a semi-convertible top attaches to. Convertibles have particular concerns for roll-over protection. In some modern convertibles a strong windscreen frame acts as a roll bar. [ [ Teknikens Värld: Provkörning av Saab 9-3 Cabriolet] ]

"Note about potential confusion:" roll bar is also the name of a device for stiffening the suspension of a car and is as such sometimes referred to as a "sway bar".

Roll hoops are essentially two roll bars, one behind the driver and one behind the passenger. Sometimes just a single roll hoop behind the driver is used. Sometimes they are integrated into the design of the body.

A newer form of rollover protect 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 [] , Mercedes-Benz SL 500, and Jaguar XK [] .


ee also

*Roll Over Protection System
*Active Rollover Protection

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Look at other dictionaries:

  • roll cage — A protective structure which surrounds the driver in the event of a rollover or crash. It includes a rollbar and other bars welded to the rollbar. The roll cage also adds chassis strength and stiffness which makes for better handling… …   Dictionary of automotive terms

  • roll cage — /ˈroʊl keɪdʒ/ (say rohl kayj) noun 1. a simple framework made from metal tubing and built into a car, preventing the occupants from being crushed in the event of the car s turning over. 2. a cage used for distributing groceries to the shelves at… …  

  • roll cage — noun a framework of reinforcements protecting a car s passenger cabin in the event that it should roll on to its roof …   English new terms dictionary

  • roll cage — noun : a protective framework of metal bars encasing the driver of a vehicle (as a racing car) * * * a system of metal bars fitted around the seating area of a vehicle, esp. a racing car, to prevent the occupants from being crushed if the vehicle …   Useful english dictionary

  • roll cage — noun Date: 1966 a protective framework of metal bars encasing the driver of a vehicle (as a racing car) …   New Collegiate Dictionary

  • roll cage — a system of metal bars fitted around the seating area of a vehicle, esp. a racing car, to prevent the occupants from being crushed if the vehicle rolls over. [1965 70] * * * …   Universalium

  • roll cage — noun A set of steel or similar bars used in a racing car designed to protect the driver (or driver and co driver) if the car rolls over or in involved in some kind of crash. (The roof of an ordinary car is not normally strong enough to survive… …   Wiktionary

  • integrated roll cage — The cage or framing of the car serves the dual purpose of protecting the passenger while also creating a place to hang all the car s components engine, steering, sheet metal, etc. An integrated roll cage is one that is claimed to be especially… …   Dictionary of automotive terms

  • Cage — may refer to:Fiction* Cage (film) , a 1989 film starring Lou Ferrigno * , an episode of Law Order: Special Victims Unit * John Cage (character), a fictional character in the television show Ally McBeal * Johnny Cage, a fictional character from… …   Wikipedia

  • Roll over protection structure — (ROPS) refers to operator compartment structures (usually cabs or frames) intended to protect equipment operators from injuries caused by vehicle s or rollovers.Commonly found on heavy equipment (i.e. tractors) used in construction and… …   Wikipedia

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