Problem statement. At present, considerable attention is paid to the issues of energy saving due to limited natural resources and the increasing technology-related pollution of the environment. Absorption refrigerators differ from other cooling machines by the possibility of using secondary heat resources, such as discharges from thermal power plants, thermal waste from industrial enterprises. They are widely used in air conditioning and heating systems because of their energy-saving features, high reliability and quiet working conditions. In the design of these machines, in order to increase the efficiency of their operation, reduce the metal consumption and sizes, internally ribbed tubes are used. The production of internally ribbed tubes is possible by cutting, rolling the ribbing and rolling strips with such ribbing followed by forming into a tube. The most effective method for the production of internally ribbed tubes is a method of using rolling of ribbed strips with subsequent forming, which is characterized by high productivity and quality of the finished tubes. This study was aimed at assessing the equipment composition of the main line of quarto mill 55´260´220, its bearing capacity, the selection of a reasonable layout of the main line of the mill for rolling strips with the one-side ribbing. Methods used. To find the values of the torque from the technological load in rolling strips with the ribbing included in the differential equations, the simulation of this rolling process was performed using a FE model. The designed model makes it possible to determine the forces and torque of rolling taking into account tension of the ends of the rolled strip for various types of the applied ribbing. Dynamic loads on the links of the main line of the mill were determined for both layouts by compiling a dynamic model and solving the corresponding system of differential equations. Results. The authors obtained the following values: dynamic load factors acting on the links of the main drive, safety factors for stresses in the volume of the spindle devices under cyclic loads, and safety factors for torque on the motor coupling. Practical relevance. The analysis of the loading on the elements of the main line of quarto mill 55´260´220 made it possible to assess the equipment from the point of view of rolling ribbed strips intended for the production of internally ribbed tubes and to substantiate the rationality of the choice of the main line components for the rolling mill driven through back-up rolls.