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.

A system for use with a post-tensioning concrete anchor may comprise a connector anchor including a bore therethrough, the bore including a first frustoconical portion, the connector anchor adapted to bear on the post-tensioning concrete anchor, and a coupler. The coupler may comprise a coupler body including a bore therethrough, the bore including a second frustoconical portion that is oriented oppositely to the first frustoconical portion, and a connector having a bore therethrough and configured to receive the coupler body therein, the connector adapted to mechanically engage the connector anchor such that a tensioning force can be transmitted from the coupler body to the connector anchor via the connector. A method of using the system may allow a second concrete section to be poured adjacent to a first concrete section before the first concrete section has been stressed.

A slab filler, and method for implementing fillers in a two-way concrete slab for building structures, are disclosed. The filler comprises an upper keeper tray and a lower keeper tray, and a volumetric filling element. The upper keeper tray is attached to a top of the volumetric filling element and the lower keeper tray is attached to a bottom of the volumetric filling element. The filler comprises a plurality of indicators positioned on all corners of the keeper tray to indicate an amount or level of a concrete fed on the filler. The filler further comprises grooves at an end of the spacer, configured to securely hold one or more belts. Spacers and belts are configured to receive one or more rebar. Further, the volumetric filling element is a high-density material, where the filler is incorporated without upper keeper tray and lower keeper tray.

A slab filler, and method for implementing fillers in a two-way concrete slab for building structures, are disclosed. The filler comprises an upper keeper tray and a lower keeper tray, and a volumetric filling element. The upper keeper tray is attached to a top of the volumetric filling element and the lower keeper tray is attached to a bottom of the volumetric filling element. The filler comprises a plurality of indicators positioned on all corners of the keeper tray to indicate an amount or level of a concrete fed on the filler. The filler further comprises grooves at an end of the spacer, configured to securely hold one or more belts. Spacers and belts are configured to receive one or more rebar. Further, the volumetric filling element is a high-density material, where the filler is incorporated without upper keeper tray and lower keeper tray.

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 anchor for supporting a reinforcing mesh includes an elongated bar having a predetermined length. A cap is mounted on the elongated bar and includes a mounting section with an opening for receiving the elongated bar and a clip section extending from a side of the mounting section and including a flexible slot configured to receive a section of a reinforcing mesh therein.

An anchor for supporting a reinforcing mesh includes an elongated bar having a predetermined length. A cap is mounted on the elongated bar and includes a mounting section with an opening for receiving the elongated bar and a clip section extending from a side of the mounting section and including a flexible slot configured to receive a section of a reinforcing mesh therein.

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 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 spacer for spacing the reinforcing cage from the forms used in making concrete products. The spacer of the invention is made from plastic in the shape of a wheel with spokes that join an outer ring with an inner ring that engages a horizontal wire on the wire cage. The rings have gaps to provide for installation of the spacer on a cage wire. The gap in the outer ring is closed by a latch that when properly engaged, will lock the spacer in place on the wire, thus positively holding the spacer on the wire once it is locked in place.