Prefabricated reinforced concrete lintels Type L-19 are produced on the basis of expanded clay, which makes them 30% lighter than traditional concrete ones. The structural and technological solution of the designed lintels is characterized by a different approach to the shaping and design of lintels. The proposed solution is based on the adoption of a phased construction of lintels. To harmonize the range of lintels, one type of lintel beam has been designed for a given opening length, i.e. there is no division into door and window lintels and there is no division into lintels loaded and unloaded with ceilings. They can be used in all types of lintels in residential buildings and in other types of construction.