The object of research are buildings erected using monolithic technology, namely, a fragment of a cantilever release of a reinforced concrete floor disk with a perforation device for thermal liner. The purpose of the study is to identify the causes of emergency situations of console releases of the overlap disk, taking into account external climatic influences on buildings of the types under consideration. The problem of the influence of such factors on the overlap disk with perforation for thermal liner is considered. Method. The calculation uses the most common geometric parameters that take into account certain ratios of the perforation step. The initial values were taken as the temperature of the closure of the structure for the conditions of St. Petersburg (Russian Federation) in the warm and cold period of the year. Results. The nature of changes in linear deformations, normal and tangential stresses, taking into account temperature influences, is revealed. The analysis of the causes of the formation of concrete destruction and the formation of cracks in the cantilever outlets of the overlap disk is given.