Abstract. The article reviews some aspects of simulation of static and dynamic conditions of building bearing structures due to its necessity for durability estimation. The main method of this simulation is Finite SuperElement Method (FSEM), which is characterized by its main principle «One rod -one super-element». This element, called a super-element, may be a part of a larger multi-body system or it may be an entire mechanical system. The main algorithm of FSEM modelling focused on possible variation of bearing structure is given.