9 COMMUNICATIONS 1/2015 ● 1. Introduction State of protection of persons and property level follows development of external and internal security environment in which they operate. An important indicator of security or risk level is criminality, especially the violent crime. Democratization of frearm ownership created relatively new phenomenon of security risk which until now correlated mainly with contracted attacks focused on lives and health of risk groups of persons (e.g. important political ofcials, members of the Government or Justice, ambassadors, members of criminal organizations, etc.). In recent period, relatives of risk group members, transporters of cash or valuables and ordinary citizens have also become targets of contracted violent attacks. Potential victims of assaults with weapon become most vulnerable mainly during transportation by motor vehicles. This status results from the nature of utilization of motor vehicle transportation. Potential victims are limited then not only by road infrastructure, but also by internal space of the vehicle which impedes their defense. Relying on passive protection elements of vehicles is possible only in vehicles in which special modifcations were carried out, enhancing their burglar resistance against attacks utilizing frearms. Vehicles reinforced, for example by armor, provide high level of protection to their crew. Commercially produced vehicles are reinforced [1]. These are able to maintain the original technical and driving characteristics after modifcation. High cost of said types of personal motor vehicles, as well as the modifcations, signifcantly lowers their availability to wider public (average price of reinforced personal motor vehicle moves around 200 000 €). For this reason, the target customers of modifed (armoured) vehicles are mainly politicians, ambassadors, entrepreneurs or bosses of criminal organizations. Other concerned groups of persons are insufciently protected against attacks with frearms from the viewpoint of burglar resistance of commercially used vehicles. 2. Problem description Currently most of providers of personal motor vehicles reinforcement prefer steel sheets which provide high level PROPOSAL FOR INCREASE OF BURGLAR RESISTANCE OF COMMERCIALLY MANUFACTURED MOTOR VEHICLE DOORS PROPOSAL FOR INCREASE OF BURGLAR RESISTANCE OF COMMERCIALLY MANUFACTURED MOTOR VEHICLE DOORS Kamil Boc - Dagmar Vidrikova - Zoran Cekerevac - Jan Misik * In many cases the level of personal protection especially during transportation by personal motor vehicles is dependent on burglar resis- tance of used car body materials. Currently commercially manufactured personal motor vehicles are modified by insertion offiller materials of high density (steel plates inserted into doors, steel reinforcements of vehicle floors). This approach causes not only increase in financial costs for procurement of such modified (armoured) vehicle, but also changes its driving characteristics. Particularly its financial cost affects its accessibility to wide public. Several cases of use of small firearms against the occupants of commercially manufactured personal motor vehicles have been investigated in recent years. The results of such attacks were casualties or grievous bodily harm. Considered materials were experimentally tested for the purpose of increasing burglar resistance mainly of commercially manufactured motor vehicle doors and increase of their burglar resistance against shots from small firearms. The result of experiments that were carried out was the recommendation for reinforcement of car body doors of personal motor vehicles using molten polycarbonate materials. The thickness of 24 mm resulted in such increase of door burglar resistance that used small firearm ammunition could not penetrate this barrier. Keywords: Person and property protection, security, burglar resistance, bullet, ammunition, reinforced, personal motor vehicle, self-loading firearm. * 1 Kamil Boc, 2 Dagmar Vidrikova, 3 Zoran Cekerevac, 4 Jan Misik 1 Department of Security Management, Faculty of Security Engineering, University of Zilina, Slovakia 2 Department of Technical Sciences and Informatics, Faculty of Security Engineering, University of Zilina, Slovakia 3 Faculty of Business and Industrial Management, Union University Belgrade, Serbia 4 Department of Security Management, Faculty of Security Engineering, University of Zilina, Slovakia E-mail: Kamil.Boc@fbi.uniza.sk https://doi.org/10.26552/com.C.2015.1.9-14