HOLLOW BRICK Russian patent published in 1998 - IPC

FIELD: construction material producing industry. SUBSTANCE: this relates to production of small-size wall materials by pressing method. Brick has hollows in bed faces. Hollows are made in the form of recesses and are located so that axes of hollows made in one face are located in spaces between axes of hollows made in other face. Hollows in each face are made of such diameter or cross-sectional area that walls between adjacent hollows are of thickness not below 7 mm and of such depth that walls between end parts of hollows located in opposite faces are of thickness not below 3 mm. EFFECT: higher efficiency. 6 cl, 6 dwg