In the structural solutions of hollow bricks made of styrofoam, known to date, the corner bricks, forming after having been put together the corners of the building, have had the shape of an elongated cuboid, and so the corners of the building constructed with them were formed by the walls perpendicular with respect to each other.

The corner bricks according to the design, joined among themselves along horizontal surfaces by the joint in the form of the convex and concave shape elements, have the form of a geometrical body resulting from the pervading of the two parallel walls of the hollow brick, linked by the plastic batten plates, with the cylindrical ring. The outer diameter of the cylindrical ring equals the outer distance of the parallel walls of the hollow brick, while the inner diameter of the cylindrical ring equals, respectively, the distance between inner surfaces of the walls of the hollow brick. The height of the outer wall of the cylindrical ring equals half of the height of the lateral walls of the brick. The second half of the height of the lateral wall of the hollow brick, sticking above the upper surface of the ring, ends with a concave arc, whose radius equals the outer diameter of the cylindrical ring, while on the top and bottom surfaces of the cylindrical ring the convex and concave ring is located, respectively. The convex ring is located on the side corresponding to the convex elements of the joint linking the horizontal surfaces of the hollow brick walls, while the concave ring is located on the side corresponding to the concave elements of this joint. The two rings form the joint of the ring-form part of the hollow brick. The mutual angular position of the hollow comer bricks joined can range between 0° and 900.

The corner bricks according to the design make it possible to construct buildings having rounded corners, due to the capacity of positioning hollow bricks with respect to each other at the angles between Oo and 900.

The subject of file design is presented in the exhibit, in which Fig. 1 shows the lower corner hollow brick in view from the top, Fig.2 shows the lower corner brick in view from the bottom, and Fig.3 shows the lower corner brick in lateral view; then, Fig.4 shows the upper comer hollow brick in view from the top, Fig.5 shows the upper corner hollow brick in view from the bottom, and Fig.6 shows the upper corner brick in lateral view; finally, Fig.7 shows the two corner bricks linked with the convex and concave rings, in view from the top.

In accordance with notation of the figures the corner bricks have the shape of a geometrical body resulting from the pervading of the two parallel walls 1 and 2 of the brick, linked by the batten plates 3 made of plastic, with the cylindrical ring 4.

The outer surface 5 of the cylindrical ring 4 has diameter D equal the distance between the outer parallel walls of the hollow brick, while the inner surface 6 of the cylindrical ring 4 has the diameter d equal the distance between the inner walls of the hollow brick. The height hl of the outer wall of the cylindrical ring is equal half the height H of the lateral walls 1 and 2 of the hollow brick. The second half h2 of the height of the lateral wall of the hollow brick, sticking above the ring surface, ends with concave ring, whose radius equals the outer diameter 5 of the cylindrical ring 4. On the upper and lower surfaces of the ring 4 the convex ring 8 or the concave ring 9 is located, respectively, with the convex ring 8 located on the side corresponding to the convex elements 10 of the joint linking the horizontal surfaces of the parallel walls of the hollow brick, 1 and 2 while the concave ring 9 is located on the side corresponding to the concave elements 11 of the joint. The two rings, 8 and 9 form the joint of the ring-form part of the bricks.