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Purpose of this thesis is to describe suspension technical worksvehicles and military vehicles. The purpose of this study is the behavior of the vehicle chassis on uneven ground and the displacement of the center of gravity. For the thesis project gathered information from manufacturers of machinery project, from technical journals and literature. Examined and compared various types posts on the vehicles to be mentioned. In the first part of thesis refers to the suspension systems for the operation of the spring and damper. In the next chapter of the work is a description of some of the posts in military vehicles. Specifically in tracked tank tanks and described their motion capabilities on rough terrain as well as the suspension system it is fitted as a torsion beam, boom via torque and torsion stabilizer to develop tracked high speeds. For general purpose vehicles is a description of the types of posts that exist in these vehicles. Finally mentioned for semitrailers separate suspension that the front and rear wheels and the special suspension system equipped trucks TATRA. In the third chapter study technical works vehicles and the suspension system they are fitted, how they behave on the ground and the differences between wheeled and tracked vehicles.Finally we will see innovative suspension systems to be installed in the future or in the plans of engineers to improve heavy vehicles.