A multi-use block including a block body having at least a first leg. The blocks can be placed in different orientations with respect to each other to form multiple interlocking structures. The block can be a variety of materials, including concrete, and when concrete, used for making walls and columns. Methods of making and methods of use are provided.

A concrete panel system includes first, second, and third rectangular precast concrete panels, each defining a respective top edge, bottom edge, and first and second lateral edges. A first type connector is formed in the concrete material at least along the top edge of the first panel and along the first lateral edge of the first panel. A second type connector is formed in the concrete material at least along the second lateral edge of the second panel, and along the bottom edge of the third panel. The first type connector and the second type connector are configured to connect together so as to form a cavity between the respective panel edges. This cavity extends along the first lateral edge of the first panel to facilitate positioning rebar between adjacent panels.

A concrete panel system includes first, second, and third rectangular precast concrete panels, each defining a respective top edge, bottom edge, and first and second lateral edges. A first type connector is formed in the concrete material at least along the top edge of the first panel and along the first lateral edge of the first panel. A second type connector is formed in the concrete material at least along the second lateral edge of the second panel, and along the bottom edge of the third panel. The first type connector and the second type connector are configured to connect together, and a cavity is formed between the respective panel edges. This cavity extends along both the top edge of the first panel and the first lateral edge of the first panel to facilitate positioning reinforcing bar traversing a corner of the first or second panel.

A multi-use block including a block body having at least a first leg. The blocks can be placed in different orientations with respect to each other to form multiple interlocking structures. The block can be a variety of materials, including concrete, and when concrete, used for making walls and columns. Methods of making and methods of use are provided.

An interlocking system of modular units engageable to form vertically and horizontally stable assemblies. The modular units include blocks and modular panels, each having vertical and optional horizontal bores that provide passage for plumbing, electrical wiring, and other connectivity. The modular units may be formed of lightweight cementitious materials, and may find use in assemblies such as walls, floors, ceilings, roofs, and entire building structures.

An interlocking system of Emodular units engageable to form vertically and horizontally stable assemblies. The modular units include blocks and modular panels, each having vertical and optional horizontal bores that provide passage for plumbing, electrical wiring, and other connectivity. The modular units may be formed of lightweight cementitious materials, and may find use in assemblies such as walls, floors, ceilings, roofs, and entire building structures.

A system of construction elements for jointless erection of building walls, including center, corner and edge blocks, with each block having a cuboid shape with profiled mating system in the form of lugs and recesses matching adjacent blocks at the points of their locking, providing the mating system in the center blocks, corner blocks and edge blocks are located on each horizontal and vertical mating surface, wherein the center block has, on the horizontal top surface, a mating system in the form of lugs having the shape of two flattened cuboids, arranged symmetrically and connected by a crosspiece, on the horizontal bottom surface it has a cuboid recess adapted for mating with lugs on the top surface, while on the vertical mating surfaces.