An adjustable height rebar chair includes a threaded rebar support column threadably connected to a tripod base, and each consists of a respective one-piece body of molded plastic. A top end of the rebar support column terminates in an adjustment handle that defines first and second concave rebar cradles that are orthogonal to each other. The rebar support column also includes a vertical surface extending from the adjustment handle toward a bottom end of a threaded rod, and the vertical surface has numerical indicia that decrease in magnitude in a direction toward the adjustment handle. A number of the numerical indicia that is located next to a top of the central core corresponds to a distance along a vertical centerline from the three feet of the tripod base to at least one of the first and second concave rebar cradles.

An adjustable height rebar chair includes a threaded rebar support column threadably connected to a tripod base, and each consists of a respective one-piece body of molded plastic. A top end of the rebar support column terminates in an adjustment handle that defines first and second concave rebar cradles that are orthogonal to each other. The rebar support column also includes a vertical surface extending from the adjustment handle toward a bottom end of a threaded rod, and the vertical surface has numerical indicia that decrease in magnitude in a direction toward the adjustment handle. A number of the numerical indicia that is located next to a top of the central core corresponds to a distance along a vertical centerline from the three feet of the tripod base to at least one of the first and second concave rebar cradles.

The disclosure presents a composite conduit formwork structure which includes a cylindrical outer casing adapted to bond with a cylindrical inner casing which are maintained at a fixed distance apart by a plurality of radial stanchions. The inner casing and outer casing form an interior void which is filled with concrete during manufacture. The outer casing and inner casing remain in place to protect the structure once completed. A novel method of assembly is also provided whereby radial stanchions are rotated between the outer casing and inner casing. All of the components in a preferred embodiment are formed of a fiberglass material.

The present disclosure provides a grid fixing apparatus including a spacer-integrated retaining clip and a grid fixing method using the same capable of integrally forming a retaining clip and a spacer, forming a grid fixing apparatus to be tacked into an object through an anchor pin to firmly fix a grid reinforcement material to a surface or an outer side of the object, and fixing the grid reinforcement material in vertical and horizontal directions to precisely construct the grid reinforcement material and capable of being applied to all grid reinforcement materials manufactured in a lattice shape, such as a metallic mesh, a geogrid, and a textile grid made of a high-strength fiber, and being utilized in construction of a grid reinforcement material to which various binders such as concrete, mortar, a pavement material, and a finishing material are applied.

A rebar positioning apparatus configured to retain a piece of rebar and allow incremental vertical movement thereof in an upwards direction during the laying of courses of a concrete block wall. The rebar positioning apparatus of the present invention has a body wherein the body includes a center section. The center section of the body includes a first ring member and a second ring member both being annular in shape. The first ring member includes a plurality of retention members formed on the wall wherein the plurality of retention members extend inward towards the central void of the first ring member. A first support portion and a second support portion are integrally formed with the center section extending outward from opposing sides thereof. The first support portion and second support portion each have lateral support members that are v-shaped.

A tie assembly for use during construction of monolithic cast-in-place concrete floor slabs bearing on a masonry stem wall. The tie assembly connects to one or more header blocks of the stem wall, and the tie assembly is configured to retain a concrete form member in place during the pour and curing period of the cast-in-place concrete. The tie assembly has a removable tab member with one or more slots for receiving a wedge stake, which braces the form member against lateral forces caused by the wet concrete. A mechanical fastener is driven through an upper portion of the wedge stake and concrete form, and the insertion tip of the mechanical fastener connects to a reinforcement holder for retaining a reinforcing member in place.

Rebar-based support assemblies that can be fabricated without the need for on-site welding. The assemblies include a number of differing sized and shaped crimps used in place of welds to provide rebar assembly-to-rebar assembly connections. Each crimp mechanically couples two or three pieces of rebar together, such as a border bar of one rebar assembly to a border bar of an adjacent rebar assembly. Each crimp includes a body with two or more arcuate recessed surfaces each for receiving a piece of rebar. In a first configuration of the crimp, a pair of spaced-apart arms (or extending members) extend from the body and define an opening through which the rebar is passed and set into the recessed surfaces. A deformation force is applied upon the two arms to deform the body into a second configuration with the arms in abutting contact or nearly so at an outer tip or end.

A formwork stud system includes a plurality of studs, a top channel, a bottom channel and a plurality of horizontal and vertical rebars. At least one of the plurality of studs is a formwork stud. The formwork stud includes a web and a pair of flanges. The web has opposed side portions extending from the top of the formwork stud to the bottom of the formwork stud and a plurality of lateral spaced apart connectors extending between the opposed side portions. The opposed side portions and the lateral spaced apart connectors define a plurality of spaced apart holes. The holes are configured to allow concrete to flow therethrough. The pair of flanges extend generally orthogonally from the opposed side portions of the web.

Systems for reinforcement of structural elements such as piles, posts, pillars, and pipes are disclosed. The present invention features reinforced structural elements. The reinforced structural elements may include a sleeve structure positioned around a length of the structural element such that there is a chamber between the structural element and the sleeve structure. This chamber may be filled with concrete or another core filler material so as to reinforce the structural element. The sleeve structures of the present invention may be formed by the assembly of multiple staggered segmented layers of coupled reinforcing shells such as rigid, semi-rigid, or flexible fiber-reinforced shells.

The invention comprises a product. The product comprises a foam insulating panel, the panel having a first primary surface and an opposite second primary surface, wherein the foam insulating panel defines at least one recessed channel in the first primary surface, the at least one recessed channel being sized and shaped to provide a mold for a structural reinforcing member. The product also comprises a concrete panel formed on the first primary surface and filling the at least one recessed channel so as to provide a structural reinforcing member for the concrete panel. The product further comprises an elongate anchor member in the foam insulating panel and extending from the first primary surface of the foam insulating panel into the concrete panel. A method of making a composite reinforced insulated concrete structure is also disclosed.