Project - technical documentation for the production of the wooden ceiling of a family ground - floor cottage located in Erdut near Osijek has been prepared. The wooden ceiling structure of the ground floor family house is calculated according to the regulations of the HRN EN-1995 group. The ceiling structure consists of a load-bearing structure composed of wooden beams measuring b/h=10/12 cm, of subfloor layers (ceilings) consisting of 2.4 cm thick board formwork and 1.25 cm thick plasterboard, and of floor layers, or OSB board 2.2 cm thick. The external dimensions of the building are 7.40m x 6.20m, within which there are rooms as follows: covered terrace, hallway, kitchen, 2 bedrooms and a bathroom. The structure is calculated on a constant load from its own weight and on a variable load from the use load of non-residential space in the amount of 1.00 kN/m2. According to the task template, solid wood of strength class C24 was used, the characteristics of which were taken from the corresponding HRN EN-1995 standard. All beams of the structure are disassembled into a static system of simple beams and their corresponding loads are calculated by positions with regard to the distances between them and the spans they bridge. The software used to obtain the corresponding "M", "V" and "N" diagrams is "Autodesk Robot Structural Analysis Professional 2021". For each position, its load analysis, static analysis and checks of the limit states of bearing capacity and usability (GSN and GSU) are determined.