This article considers a new type of structures in the form of lightweight stainless steel floor slabs, gives an overview of application in construction practice, discusses the advantages and disadvantages. Based on the results of a series of structural analysis of several conditional models of buildings with different structural systems, the parameters of economic efficiency in the form of reduction of total metal intensity are determined. The area with increased efficiency of application of the considered plates in buildings is defined and the vector of necessary further research on the topic is outlined.

Keywords: B-Core slabs, multilayer floor slabs, stainless steel, metal cost reduction, efficient application area, structural building layouts