The object of research of the current state of the field of masonry application is characterized by a variety of constructive and technical solutions, a variety of characteristics of the materials and products used. Research in the field of strength and deformability of masonry, including those reinforced in various ways, is relevant and aimed at increasing the degree of reliability and safety. Method. Comprehensive experimental studies of masonry made of various materials, including reinforced and reinforced with clips, have been carried out. Results. Experimentally, data on the stressed-deformed state and peculiarities of the mechanisms of destruction of stone and reinforced stone masonry used in the development of theoretical foundations and models of calculation methods using the diagram method were obtained. As a result of many years of experimental studies, qualitative and quantitative characteristics of the stressed-deformed state of stone and reinforced stone masonry, considered during the construction of design models for the operation of compressed structures, were obtained.