CHANGES JUSTIFICATION IN A CALCULATING METHOD OF LOAD STABILITY OF AUTOMOTIVE HOISTING CRANES AND AUTOMOTIVE MANIPULATOR CRANES BASED ON THE NORMATIVE DOCUMENTS ANALYSIS

Introduction. The main requirement for lifting equipment is a strict compliance with safe operation measures. Therefore, special attention is focused on this issue when designing each unit of the equipment. However, despite the extensive list of the current normative documents and systematic monitoring, according to the annual official reports of the Federal service for environmental, technological and nuclear supervision over recent years the facilities that use lifting structures have high indicators for the number of accidents. In addition, the study of a load stability ratio determining in the design of automotive hoisting cranes and automotive manipulator cranes is particularly relevant at the present time due to a wide development of new lifting equipment as the development of the market for cranes has resulted in the occurrence of new technical issues in design and manufacture this type of lifting equipment. As part of the research work to improve the accuracy of calculating the load stability of automotive hoisting cranes and automotive manipulator cranes based on the analysis of existing normative and technical documents the possible occurrence of the accidents causes due to imperfection of regulatory instructions or non-compliance with regulatory instructions during design manufacturer work was considered.Materials and methods. This article is devoted to the study the fundamental principles of the nominative documents regulating the design and operation of the automotive hoisting cranes and automotive manipulator cranes. Both of the current and archived nominative documents in the field of lifting equipment are considered. Special attention is paid to the issues of determining the load stability of the automotive hoisting cranes and automotive manipulator cranes.Discussion and conclusion. The key differences in the calculating method of the load stability of the automotive hoisting cranes and automotive manipulator cranes are highlighted. The accidents statistics of load-lifting mechanisms and lifting structures of the Federal service for environmental, technological and nuclear supervision are given. The main causes of lifting equipment accidents are highlighted. The ways of solving the modernization of the existing methodology for determining the load stability of automotive hoisting cranes are proposed by including previously unrecorded factors related to the technical features of the chassis which contributes to improving the accuracy of the obtained values of the load stability ratio