Patent ID: 8869487

Claim:
A system of construction elements for the dry construction of structures possessing shaped protrusions and recesses for mutual connection during assembly, comprising: a plurality of construction element modules for raising walls, a ceiling, a roof, or any combination thereof, wherein each module comprises two construction elements with adjacent sides connected by a third construction element, creating a self-tightening connection, wherein the shaped protrusions and recesses of the construction elements have two lateral contact surfaces comprising a guiding surface and a self-tightening surface, inclined at specific respective different angles α and β, and that these angles are determined, respectively, between the perpendicular to an upper or a lower protrusion surface and the guiding or self-tightening surface, wherein the angle of inclination of the angle α is within a range of 40°-50°, and the angle β is within a range of 6°-12°, wherein the construction elements include wall construction elements that have the protrusions and the recesses located on the upper and lower surfaces forming a self-tightening connection when connected together such that the guiding surfaces of the connected protrusions and recesses are in abutting contact with each other and such that the self-tightening surfaces of the connected protrusions and recesses are in abutting contact with each other, and whereby a system of the protrusions and recesses of the lower surfaces of a first row of the wall construction elements connected to the respective recesses and protrusions of the upper surfaces of a second row of the wall construction elements is shifted by half of the length of a wall construction element with respect to the second row of the wall construction elements.