A method for re-tensioning a stressed tendon cast in a reinforced concrete structure includes removing concrete from the structure to expose the tendon. A pocket former is attached to the exposed tendon. The pocket former comprises two partial sections assembled to enclose the tendon. Grout is poured around the pocket former and is allowed to substantially cure. The pocket former is removed and the tendon is cut. An anchor is assembled to the tendon and the tendon is stressed.

Various embodiments of the present disclosure provide a cast-in-place concrete slab load transfer apparatus and method of manufacturing same. In various embodiments, the concrete slab load transfer apparatus includes a plurality of load transfer dowels each having a top surface and a bottom surface, a basket supporting the load transfer dowels, and a plurality of welds including a plurality of breakable welds connecting the bottom surfaces of the load transfer dowels to the basket.

The described Concrete Form Brace With Multi-Depth Rebar Positioning is comprised of opposing attachment members, which secure the brace to the concrete form elements. The attachment members have a first top end, and a second bottom end. The corresponding bottom ends of the attachment members are connected by a spanning element, which spans the width of the concrete form. The attachment members and spanning element are further connected by a plurality of reinforcing struts. Rebar attachment means at multiple vertical depths within the concrete form are integrated or connected to the reinforcing struts to provide rebar securement means at multiple depths within the poured concrete. The preferred embodiment also features vertical spacing between horizontally placed rebar to accommodate “L” shaped vertical rebar placement for applications where vertical rebar is specified.

A plurality of seismic foundation frames are utilized to secure rebar in a fixed location to produce a cementitious supporting form that is embedded in the poured concrete and reinforces the concrete. The frame has an open construction with a plurality of openings to allow the concrete to flow therethrough and to provide increased surface area for reinforcement. The frame has pin openings and rebar openings for receiving and retaining pins or rebar respectively, such as when the frames are stacked. A frame has rebar retainers for retaining rebar that extends perpendicularly to the surface of the frame to a second frame at an offset distance. A flexible containment sleeve is configured around the frames and may be fastened to the frame to create a sleeved form for receiving a cementitious mix. The containment sleeve has apertures for controlled permeation to control the rate of cure of the cementitious mix.

An adjustable concrete reinforcement assembly includes a base member having a pair of open ends and an upper axial cavity defined along the length of the base member. A pair of frame members each include a horizontal extending portion and a vertical extending portion in which the horizontal extending portions are sized to engage the upper axial cavity of the base member. A hanger member is disposed at an upper end of the vertical extending portions of each frame member; wherein the frame members are axially movable within the base member to enable a horizontal dimension of the assembly to be selectively adjusted. At least one support is further provided to receive at least one concrete reinforcement member, such as rebar. In at least one version, adjustments can be to the horizontal dimension of the frame and optionally the vertical and horizontal positioning of the hanger members relative to a concrete form.

An enhanced non-coplanar double winding reinforcement method has a main reinforcing bars erecting step, a reinforcement stirrup winding step, and a crossties double hooking and confining step. The main reinforcing bars and the reinforcement stirrup can be stably confined by the crossties. No iron wire is needed for bundling. Toughness and aseismatic capability of a structure built by the enhanced non-coplanar double winding reinforcement method is improved. Accordingly, construction steps are simplified and construction efficiency are increased. A first plane defined by a main rod portion and a first hook portion of the crosstie and a second plane defined by the main rod portion and a second hook portion of the crosstie intersect, the second hook portion can pass between two of the main reinforcing bars that are disposed next to each other even when the main reinforcing bars are densely arranged.

A permanent spacing beam for the rapid deployment of roofing trusses on site. Such permanent spacing beams and truss ties as described may utilize a mount end, a retention end, and an elongate portion which spans the distance between the mount end and the retention end. The mount end may have a mount slot and the retention end may have a retention slot. The mount slot and the retention slot may be configured to permanently couple and mount to a first truss timber stud and an adjacent truss timber stud used in residential and commercial roof construction. Such a configuration results in a permanent truss tie being spanned between two roofing trusses thereby creating a more robust and sturdy roof construction.

A hoop locking device for locking a hoop installed to surround a plurality of main reinforcements to give a transverse constraint force of the hoop is proposed. The hoop locking device includes: first clips configured to fix opposite ends of hoops, which cross each other while passing by one of the plurality of main reinforcements, each of the first clips comprises: an annular ring formed to surround an overlapping portion of the hoops disposed to vertically overlap each other; a leg part extending radially from opposite ends of the annular ring; and anchor parts formed to be bent rearwards from ends of the leg parts, respectively, and the opposite ends of the hoops are bent by 90 degrees while passing by the main reinforcement.

A method and system for forming a post-tensioned concrete slab using a post-tensioning concrete anchor. The system may comprise a connector anchor including a bore that includes a first frustoconical portion, and the connector anchor may be adapted to bear on the post-tensioning concrete anchor. The system may also comprise a coupler comprising a connector and a coupler body that includes a second frustoconical portion that is oriented oppositely to the first frustoconical portion. The connector may have a bore therethrough and may be configured to receive the coupler body and to engage the connector anchor. A pocket-forming cap may releasably engage the post-tensioning concrete anchor; the pocket-forming cap may include a frustoconical wall, a gripping head, and a connector-receiving portion. The method may include using the system to form a second concrete section adjacent to a first concrete section before stressing the first concrete section.

A modular, integrated structurally reinforced component, comprising a plurality of elongated metallic member having; a planar base extending between adjacent longitudinal edges, having patterns of smaller apertures, and larger material access openings created on the planar base extending the length thereof, a pair of planar legs extending from the planar base's longitudinal edges, forming 45-degrees to 135-degrees leg-base structural bends with the planar base. The planar legs are having a pattern of smaller apertures created on the planar leg extending the length thereof. A pair of flange sections extending from the planar leg's longitudinal edges, having a first flat planar portion and a second incurvate planar portion; the first flat planar portion extending from planar leg longitudinal edges forming a 90-135-degrees flange-leg structural bend, the said second incurvate planar portion extending from the adjacent first flat planar portion longitudinal edges, forming either a spiral, or circular, or curve planar reinforcement portion. Whereby, metallic fasteners securely connect two or more contiguous structural members to assemble Classes of modular, integrated structural components.