The body of any vehicle subject to deformation, it is constantly influenced by external forces - the road, inertia, crosswind, and more. With too strong impact of the body may become unfit for service. Many who have traveled on domestic vehicles, familiar with the situation when the jammed doors after a long parking lot on uneven surfaces, such as a jack or when the two wheels on the road, and two - on the curb. Good car features high torsional stiffness, and if it is small, it has a worse handling, it quickly wears out. Rigidity of the body depends on its type: the most persistent - and three-door hatchback coupe, thanks to their form they can best resist bending in the corners, and the least severe - wagons and vans. During the operation of the vehicle at a low stiffness disrupted the front and rear suspensions due to the softening of the metal at fixing suspension arms. The destruction of the body occurs gradually - first peel welds, in their places of discontinuity formed corrosion, rust appears. In the sports cars set the frames - they protect the driver and increase body rigidity. About 14 years ago, carcasses are a prerequisite for participation in road contests. Frame - a system of interconnected steel, cold drawn seamless tubes. Pipes are primary and safety. After installing the outriggers to the weight of the car adds 40-50 kg, which is why increasing the acceleration time. Frames are divided into two categories - professional (homologated) and amateur (neomologirovanny). The first allows you to be admitted to the official race, although recent years have increasingly found mixed options. Self-same manufacturing framework often leads to disastrous results - incorrect calculations and work with improvised tools do not guarantee the safety of the pilot, rather the contrary. Installation methods can also be divided into two types: Welding - Arc welded to the superstructure of the bodywork, and collapsible - frame attached to the set screws in the back loops, this skeleton is easy to uninstall. Operating a car with the established framework requires the pilot to use straps, attached at several points that have an impact on the human body load. Civil trips around town or highway compounded the deterioration of visibility and inconvenience when boarding and alighting from the car. However, bumpers guard driver from fractures and injuries in the accident, if the frame is made not for beauty but for the case. But in similar situations in urban environments pilot risks go to a hospital bed with a passenger, because the installation frame excludes the work of airbags. Many of the disadvantages could be patient, but another negative frame that if any would be very difficult to pass inspection in the SAI.
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