BUILDING BLOCKS

摘要

A building block (11) of substantially rectangular prismatic configuration. The first pair of opposite edges (16, 17) of the block are each formed with a first tongue (18) and a first groove (19) of complementary configuration extending in parallel relationship along each edge wherein the first tongue (18) of one edge is opposite the first groove (19) of the other edge. Each of said first pair of edges (16, 17) is formed with a land portion (20) extending between the sides of said edge and the adjacent first tongue (18) or groove (19). The height of said first tongue (18) above said land portion (20) is greater than the depth of the first groove (19) below said land portion such that on a pair of blocks abutting whereby the first tongue (18) of one edge is snugly received within the first groove (19) of the other edge of another block, the opposing land portions (20) of the blocks are spaced from each other. The second pair of edges (12, 13) are formed whereby one edge (12) has a second tongue (14) extending along its edge and the portion (22) of the one edge (12) to each side of the second tongue (14) is formed with raised land portions (21). The other edge (13) of said second pair of edges (12, 13) is formed with a second groove (15) of complementary configuration to said second tongue (14) wherein the height of the second tongue (14) above the land portions (21) is equal to the depth of the second groove (15).