An insert for lifting and leveling a precast concrete slab is provided. The insert includes a sleeve that extends through the concrete slab and has two distinct threaded portions on an inner surface of the sleeve. This configuration allows a lifting bolt to be positioned into an upper end of the sleeve to lift the concrete slab, and a different-sized leveling bolt to be positioned in the sleeve to selectively elevate or raise part of the concrete slab relative to a ground surface.

A pulling-out device for a prefabricated concrete support wall, belonging to the field of concrete support structures, wherein a vertical hollow tube is pre-buried in the prefabricated concrete support wall. The pulling-out device includes a pulling-out mechanism disposed in the hollow tube by penetration, the lower end of the pulling-out mechanism is fixedly arranged in the prefabricated concrete support wall and positioned at the lower end of the hollow tube, a first fixing device for tensing the pulling-out mechanism is arranged at the upper end of the pulling-out mechanism, and the first fixing device is not connected with the prefabricated concrete support wall.

A lifting system for a concrete component comprises a void former incorporated into the component during casting and which provides within the component a void which receives a locking pin of a lifting anchor assembly which is locked within the void by rotation of a locking pin. The lifting anchor assembly has a visual indicator to indicate when the pin is in its locked condition within the void, and a pivotal lifting shackle of the assembly is prevented from movement into a position in which lifting can take place until the pin is in its locked condition. Preferably a base of the void former is configured to retain components of a jacking system by which a concrete slab used for road repair can be jacked into a level configuration with the remainder of the roadway when it has been positioned by use of the lifting system.

A lifting and jacking apparatus including a void former configured for embedment in a concrete slab before pouring of the concrete slab and a lifting bail removably insertable in and securely attachable to the void former. The void former includes a built in jacking screw configured to assist in adjusting the height of the concrete slab.

A lifting anchor assembly that is configured to be embedded in a tilt-up concrete structure includes an anchor member that has a central portion configured to engage a lift apparatus and a pair of legs that extend downward from the central portion. A lower portion of each of the pair of legs includes a curved section configured to engage within a concrete structure during its forming process. A spacer may be selected to attach at an end portion of each the pair of legs, where the spacers each extend downward from the anchor member and rest on a floor surface of a concrete form to support the anchor member at a desired spacing from the floor and upright within the concrete structure that is cast in the concrete form.

The subject invention relates to a beam-column connection structure and method of making the same wherein the beam-column connection structure includes: a precast column comprising a plurality of tension bars horizontally embedded in the precast column; a precast beam comprising a metal plate fastened to an end surface of the precast beam, the metal plate having a plurality of through holes; and a plurality of fasteners, wherein each of the fasteners respectively penetrates through each of the through holes of the metal plate and connects to an end of a corresponding tension bar so that the precast beam is fixed to the precast column.

Concrete coupling assembly comprises a base holder for being attached to a concrete forming surface, the base holder including a central opening; a coupler having one end disposed within the central opening, the coupler having an axis for being positioned substantially transverse to the forming surface, the coupler having first and second threaded bores through the one end for attachment of a threaded rod; and a separate anchor body threadedly attached to another end of the coupler.

There is disclosed a lifting attachment for a building unit comprising sheeting and a support structure over which the sheeting is disposed, the attachment being configured such that it can be connected to or integrated into the support structure and comprising a lifting anchor that, when the attachment is so connected or integrated, is engageable by a component for lifting the unit such that a releasable interconnection between the component and the support structure passes through an opening in the sheeting.

An apparatus for manipulating assembly components into desired configurations and a method for using same, where the assembly component includes a first and second bore set at a first and second transverse angles, for receiving attaching members. The apparatus includes a pair of attaching members that engage the bores to extend toward each other, and a manipulating member securing the base portions of the attaching members to each other. The attaching members may include side struts that relieve side pressure on the bores and may also include internal air passageways. The manipulating member has a length that prevents the secured attaching members from disengaging from their bores, and provides a location for a moving device to indirectly connect to the assembly component. The moving device can move the assembly component in a different directions to achieve different configurations.

A brace insert device that is configured to be cast in concrete includes an anchor insert that has a hub with a threaded inner surface and a plurality of legs extending from the hub. A fastener has a shank portion that is threadably engaged with the threaded inner surface of the hub, where a head portion of the fastener is coupled to an end of the shank portion. A cap has an inner surface that is disposed over and conceals the head portion of the fastener. The cap is configured to be removed from a cured concrete structure to expose and allow operable access to the head portion of the fastener for use in attaching a wall brace.