The article concerns a circular shell band and a circular arch; it includes a closed statics solutions of these structures which meet any system of boundary conditions which means ensuring cooperation with any building structure with a different shape. In the embodiment, the load was applied in the radial direction and in the direction perpendicular to the chord, applied to the curve. The amount of the internal forces complies with the internal and of the radius to the thickness of the band or to the height of the arch section depending on the opening angle of curvature.

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