Abstract: The present invention is an improvement on a previous version of an interlocking building block system for use in constructing a building wall. The improvements introduced are radii corners and chamfered edges that allow for claddings to be attached to the wall by leaving space for mechanical screws to be secured between two blocks. Furthermore, the radii corners allowed for increased mechanical movement between two interlocking blocks, resulting in greater durability of the blocks. The improvement also include a corner block and an intersecting block which replace the need for using multiple blocks to create intersecting points or corners. Some blocks also contain an additional hollow cavity with channels to allow increased support members to be introduced between blocks, thus increasing the height of the walls that can be built using the block system.

Abstract: A block for use in interlocking with other similar blocks in constructing a building has a block body having a top surface and a bottom surface with an outer block wall defining one side surface of the block body. A head portion extends from the outer block wall toward an opposed side surface. A connecting portion on respective sides of the head arranged to receive at least one correspondingly shaped connection portion of at least one second block in interlocking relationship therewith. Two abutment portions are arranged each at a respective end of the outer block wall and each defining a respective abutment shoulder.