CONSTRUCTION BLOCK FOR ERECTION OF WALLS WITH OVERLAPPING OF JOINTS Russian patent published in 1997 - IPC

FIELD: construction material industry. SUBSTANCE: upper surface of block has longitudinal protrusion and lateral protrusions which are of similar profile. Longitudinal protrusion is located at side of front face, and lateral protrusions are located perpendicular to it. Protrusions are at equal distance: one longitudinal and extreme lateral ones - from edges of faces adjacent to them, middle ones - from lateral axis of block. Recesses in lower face are made commensurable to protrusions of upper face and located oppositely to them. End faces at front side adjacent to longitudinal protrusion of upper face of block have opposite vertical commensurable protrusions and recesses. Ratio of width of end face to length of front face is equal to 1:2. EFFECT: perfect protection against water penetration inside wall, reduced material and labour needed for construction. 3 cl, 4 dwg