Precast Building Construction System A building construction system uses precast concrete panels (10) interconnected in an array to provide both floor and ceiling of a multi-unit building. Each panel has a reinforced precast concrete slab having an upper surface (12) and downstands (18, 20) providing a continuous enclosure beneath the floor surface. Grooved voids (44, 58) are preformed into the upper and lower surface of the downstands for receiving connectors (54, 56, 57 or 60, 62, 66 and 50, 52) for connecting adjacent panels. Preformed recesses (19) are provided at the edges of the panel for connecting the panels together and creating grouted shear keys (59).

Connectors comprise a hollow or extruded body, studs integrated structural reinforcement, and receiving sockets for fastening to adjacent connectors. Connectors are placed at one or more locations on prefabricated panels to couple pre-fabricated panels together in the construction of a building. Connectors may anchor structural reinforcement internal to each panel to assist in distributing forces through the structure of the building. A reinforcing mesh may at least partially wrap around the structural reinforcement of a panel.

A connector for joining concrete structures such as double tee beams to one another. The connector includes a curved bolt that is formed with a shape memory alloy. Through utilization of the bolt, a joint can be post-tensioned following assembly through application of heat to the joint. Post-tensioning can be reapplied following loosening of the joint through application of heat. When considering a super elastic shape memory alloy, the bolt can be a smart bolt that can self-correct following deformation due to excessive load.

A panel attachment structure including a panel assembly having a channel member including a channel therein. The panel assembly further includes at least one reinforcing member directly or indirectly coupled to the channel member, and an insert assembly including an insert portion. The insert portion is configured to be closely slidably received in the channel member in an insertion direction, and the insert assembly is configured to be coupled to an underlying support structure.

In some implementations, a conductive concrete composition for providing improved shielding against electromagnetic radiation comprises cement, one or more supplementary materials, aggregates, one or more carbon products, and fibers. In some implementations, the composition comprises between about 5% and about 40% by weight of cement, between about 1% and about 20% by weight of one or more supplementary materials, between about 5% and about 80% by weight of aggregates, between about 1% and about 40% by weight of one or more carbon products, and between about 1% and about 10% by weight of fibers. In some embodiments, the one or more supplementary materials comprises ground granulated blast furnace slag (GGBS), the one or more carbon products comprises graphite, and the fibers comprise steel fibers. The aggregates can include normal weight, lightweight, and/or fine aggregates.

A shear wall connector comprising a pre-built member and a connector, the pre-built member comprising a side plate, a peg, and a shear key, the side plate being provided with a first through hole, the peg and the shear key being provided on the inner and outer sides of the side plate respectively, the peg being provided with a threaded hole at the end connected to the side plate and having the threaded hole aligned with the first through hole wherein the connection member comprises an H-beam, the flange plate of the H-beam being provided with a second through-hole and a shear key adaptor hole matching the first through-hole and the shear key in the side plate. The pre-built elements are pre-built in the concrete wall surface and are assembled by means of the connectors. During installation, the shear key is inserted into the shear key adaptor hole.

A panel attachment structure including a panel assembly having a channel member including a channel therein. The panel assembly further includes at least one reinforcing member directly or indirectly coupled to the channel member, and an insert assembly including an insert portion. The insert portion is configured to be closely slidably received in the channel member in an insertion direction, and the insert assembly is configured to be coupled to an underlying support structure.

Couplings for coupling pre-cast construction segments together and pre-cast construction segments having such couplings. A construction coupling for connecting prefabricated segments includes a pair of anchors. Each anchor includes a central portion and a pair of legs. The central portion defines an elongated bore. The pair of legs extending from opposite sides of the central portion. Each leg extending in a direction generally transverse to the elongated bore and having a proximal end attached to the central portion and a free distal portion disposed away from the central portion. The construction coupling also includes a pin adapted to be received in the elongated bores of the pair of the anchors to connect the pair of anchors together.

A method is provided for securing external wall insulation (EWI) panels to the outer walls of a high rise building of large panel construction. The method involves first identifying the location of internal voids in outermost floor/ceiling panels of the building; and then creating continuous passages through the outer load-bearing wall panels of the building into the located internal voids, with each such passage forming a tie bar anchorage hole extending into the adjacent floor/ceiling panel. Down the length of each tie bar anchorage hole is inserted a tie bar that has, at an inner end portion, an anchorage, and at an outer end portion, an externally screw-threaded portion that projects from the outer load-bearing wall panel. A pattress plate is located at the outer end of each anchorage hole, with the externally screw-threaded outer end portion of each tie bar extending through the associated pattress plate.

The disclosure relates to the technical field of building construction, and provides a connecting member, an ALC batten mounting node structure, and a prefabricated mounting method. The connecting member includes a connecting part, a first pipe clamp, and a second pipe clamp. The connecting part includes a first connecting segment and a second connecting segment, the first pipe clamp and the second pipe clamp are respectively perpendicular to the first connecting segment, and symmetrically arranged on opposite sides of the first connecting segment, and the second connecting segment is bent towards one side of the first connecting segment. According to the ALC batten mounting node structure having the connecting member, the first connecting segment is located between a first ALC batten and a second ALC batten which are adjacent, the first pipe clamp is embedded in the first ALC batten, and the second pipe clamp is embedded in the second ALC batten; and the second connecting segment is configured for connecting a steel beam, achieves the effect of using the connecting member on a node position for simultaneously fixing the two adjacent ALC battens, enables fixation to be firmer, and enables a mounting process to be more convenient. The prefabricated mounting method based on the ALC batten mounting node structure can achieve sequential mounting of the ALC battens.