A variable spacer system of insulated concrete forms includes at least two panels, each panel including at least one cavity beginning at the top of the panel and ending prior to the bottom of the panel. The system further includes at least one spacer able to couple the two panels, when parallel, by entering the cavities at the tops of the panels and resting at the ends of the cavities. The cavities also accept at least one other spacer having the same dimensions as the spacer except a different thickness.

A rebar support system used in the reinforcement of concrete structures is disclosed, comprising a rebar support tower and a rebar support base, individually capable of holding rebar members at a predefined height within a range of possible heights, the two further capable of acting together in tower-base duplex fashion in the formation of multilevel rebar grids. The rebar tower has four legs between which there are defined two intersecting passages, the legs being open-ended at the bottom and forming bidirectional arches at the top of said intersecting passages, said rebar tower further having a saddle foil cation at its apex. The rebar tower provides a tapered and angled foot profile at the bottom of each leg to minimize the area of contact when used with a concrete form, thereby reducing rebar support footprints after form removal. The rebar base comprises a platform with centrally rising bidirectional saddle formations, the intersecting passages and saddle formations of tower and base providing means for receiving the intersecting segments of rebars which are normal to each other. Locking insert hooks and guide tabs incorporated in the rebar base, and hook receptacles, guide ridges and restraining surfaces incorporated in the rebar tower provide complementary means for the attachment of the two structures to form a rigid, yet detachable tower-base assembly in multiple rebar grid configurations. The rebar base provides a stable support means when used individually or in tower-base assemblies on granular surfaces, such as sand or gravel beds.

A rebar support system used in the reinforcement of concrete structures is disclosed, comprising a rebar support tower and a rebar support base, individually capable of holding rebar members at a predefined height within a range of possible heights, the two further capable of acting together in tower-base duplex fashion in the formation of multilevel rebar grids. The rebar tower has four legs between which there are defined two intersecting passages, the legs being open-ended at the bottom and forming bidirectional arches at the top of said intersecting passages, said rebar tower further having a saddle formation at its apex. The rebar tower provides a tapered and angled foot profile at the bottom of each leg to minimize the area of contact when used with a concrete form, thereby reducing rebar support footprints after form removal. The rebar base comprises a platform with centrally rising bidirectional saddle formations, the intersecting passages and saddle formations of tower and base providing means for receiving the intersecting segments of rebars which are normal to each other. Locking insert hooks and guide tabs incorporated in the rebar base, and hook receptacles, guide ridges and restraining surfaces incorporated in the rebar tower provide complementary means for the attachment of the two structures to form a rigid, yet detachable tower-base assembly in multiple rebar grid configurations. The rebar base provides a stable support means when used individually or in tower-base assemblies on granular surfaces, such as sand or gravel beds.

A rebar positioning device with opposite ends for positioning adjacent to a form face of at least one form panel may include a support rod having opposite ends and an outer surface, with at least a portion of the outer surface being threaded. At least one bar clip may be movably mounted on the support rod. An orientation of the at least one bar clip on the support rod is adjustable, and a position of the at least one bar clip on the support rod is adjustable.

The invention relates to a spacer (1) for a reinforcement layer (16), a reinforcement system (29) for a concrete component (21), and a method for the production of a reinforcement system (29). The spacers (1) described allow especially mesh-type reinforcement layers (16) to be kept at a distance from other bodies (24, 28) in a particularly simple manner. The spacers (1) are fitted by inserting them into a mesh (8) of the reinforcement layer (16) and connecting them thereto by twisting.

A vertical adjustment mechanism for adjusting the height or elevation of one or more support structures relative to the reference surface. A chair and spacer may be used to adjust the elevation of the one or more support structures. The spacer may include one or more retention clips and/or receptacles.

A shear connector for use with insulated concrete panels. The shear connector comprises an elongated core member that includes a first end and a second end, and a flanged end-piece removably secured to one of the first end or the second end of the core member. At least a portion of the flanged end-piece includes a maximum diameter that is larger than a maximum diameter of the core member. The shear connector is configured to transfer shear forces.

A shear connector for use with insulated concrete panels. The shear connector comprises an elongated core member that includes a first end and a second end, and a flanged end-piece removably secured to one of the first end or the second end of the core member. At least a portion of the flanged end-piece includes a maximum diameter that is larger than a maximum diameter of the core member. The shear connector is configured to transfer shear forces.

A device for forming, reinforcing, joint sealing and edge protecting of a concrete slab panel, wherein the concrete slab panel having a volume, a length, a width, and a surface. The device comprising of an elongated post having a body, a top end and a bottom end with a plurality of elongated grooves extending along the body; a mounting frame has a length, a width and a thickness. The mounting frames having a connecting means to connect the mounting frame to the posts. The present invention eliminates the needs for saw-cut lines for crack inducement and acts as a joint sealer for the concrete slab to relieve the tensile stresses.

A fixture for setting rebar at a predetermined distance from the rim of an excavated pit includes elongated first and second legs each having a proximal end and a distal end, the first and second legs rigidly joined at their mutual proximal ends to form an L-shape; an angle adjustment device carried by the first leg, comprising a foot movable towards or away from the first leg along an axis generally parallel to the second leg; a support bracket carried by the first leg at a predetermined offset distance from the proximal end thereof; and a hook extending from the distal end of the second leg, generally parallel to the first leg.