The object of research is precast and cast-in-situ inserted floor with cellular-concrete items used for reduction of structure weight. The used materials and installation technologies are considered.

The aim of this work is analysis of strength and deformability of floor by two different methods: analytical calculation and calculation by finite element method using SCAD. It was shown that the finite element calculation is more precise and also it allows to use armature of lesser diameter that decreases the cost of the floor.

For adjustment of given model and life duration of the structure the full-scale tests are necessary.