TRAPEZOIDAL CLOSED PROFILE Russian patent published in 2018 - IPC E04C3/07 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction and can be used as rod elements in the development of load-bearing structures of buildings and structures for various purposes, in a specific case they may be the rod elements of the chords of rung and slab roofs. Bent closed profile of a quadrangular outline with a joint in the middle of one of the faces. Each part of the stacked face has an extension in the form of an I-shaped edge. Wherein the profile has the shape of a equilateral trapezium with an angle of 90° between the lateral sides, as well as a height equal to a smaller base and equal to 0.69 of a edge size, or the equilateral trapezium with an angle of 120° between the sides, and also by a height equal to the smaller base and making up 0.421 of the size of the edge.

EFFECT: technical result consists in the same stability, uniform stability, bet closed profiles from the plane and in the plane of the truss structure, an increase in the bearing capacity, a decrease in the construction height.

1 cl, 10 dwg