Introduction. This paper analyzes the results of previously conducted experimental studies on a precast reinforced concrete frame according to Patent No. 132814 "Precast Reinforced Concrete Frame." To analyze the provisions governing the behavior of prestressed elements in the Russian Building Code SP 63.13330.2018 "Concrete and Reinforced Concrete Structures," the authors employ the results of full-scale destructive testing and numerical experiments in relation to the considered analytical methodology.

Aim. The validate the analytical methodology described in clauses 8.2.1 – 8.2.31, 9.1.1– 9.3.11 of the code of rules SP 63.13330.2018 against the results obtained through full-scale and numerical methods, taking into account the low cross-sectional height of the elements and the application of prestress to the reinforcement.

Materials and methods. Based on the results of a previously conducted full-scale destructive test, the authors perform numerical and analytical investigations into the stiffness of the tested structures. The results of the numerical analysis, carried out using the "LIRA-SAPR 2022" software complex, serve as evidential support for the conducted experiment.

Results. The analysis of the analytical methodology for determining the deformation properties of floor elements, performed by the authors, allows for proposing a number of hypotheses regarding the behavior of floor elements with a horizontally oriented cross-section and prestressed reinforcement.

Conclusions. The authors put forward hypotheses concerning the manner in which the analytical methodology, which is the subject of this research, accounts for the behavior of the elements under consideration.