Abstract: A modular construction unit including an assembly of a multiplicity of interlocking blocks, at least one of the blocks including, on at least one male end, a male element adapted to be introduced partially and held in place in a concave female element provided in another one of said blocks. The male element has at one end thereof, a first part having in section an essentially circular form of a selected diameter Z and a locking part having in section an essentially square form of larger section to create at longitudinal ends of the first part protruding planes S1 and S2, the length of sides of the square form being essentially equal to the diameter Z of the first part and. The female element has an opening having in section an essentially square form and creating a protruding plane P1, the length of sides of the square form being essentially equal to the diameter Z of the first part, as well as at least one cavity having a section larger than the section of the opening and creating a protruding plane P2.

Abstract: A modular construction unit including an assembly of a multiplicity of interlocking blocks, at least one of the blocks including, on at least one male end, a male element adapted to be introduced partially and held in place in a concave female element provided in another one of said blocks. The male element has at one end thereof, a first part having in section an essentially circular form of a selected diameter Z and a locking part having in section an essentially square form of larger section to create at longitudinal ends of the first part protruding planes S1 and S2, the length of sides of the square form being essentially equal to the diameter Z of the first part and. The female element has an opening having in section an essentially square form and creating a protruding plane P1, the length of sides of the square form being essentially equal to the diameter Z of the first part, as well as at least one cavity having a section larger than the section of the opening and creating a protruding plane P2.