Increased demands are placed on the reliability and strength of structures used in the installation of equipment for nuclear power plants. At the same time, an excessive safety margin of the equipment used leads to an increase in its dimensions, weight and a significant rise in cost. The issue of reducing the metal consumption of structures while maintaining the required performance criteria for this equipment is very relevant. The paper presents a model for optimizing the design of a three-beam traverse with a carrying capacity of 100 tons for reactor cavity reinforced concrete block installation. A verification calculation is carried out and recommendations on the optimization of design parameters are proposed on its basis.