Abstract: A splice for concrete reinforcement bars includes two diametrically opposed half-shells spanning the aligned ends of the rebars. The half-shells interlock with upset bar ends to hold the bars together. An internally tapered sleeve is forced axially over the tapered exterior of the half-shells in a taper lock to secure the splice joint.

Abstract: A quick connect splice for concrete reinforcement bars includes two diametrically opposed half-shells spanning the aligned ends of the rebars. The half-shells interlock with raised ridges on the bar surfaces to hold the bar ends together. Two sleeve elements slipped over the bars are screwed to each other over the shell sections to secure the splice joint.

Abstract: A quick-connect splice joint for concrete reinforcement bars. Two diametrically opposed semi-cylindrical shells span the adjacent bar ends. The two shells are held against axial displacement by mating to raised features such as ridges or threads on the bars, and are held radially by an outer sleeve. The splice is axially preloaded by nuts threaded on the bars.

Abstract: A rebar splice joint embedded in a reinforced concrete structure and having improved seismic resistance is made between a first rebar with an internal thread and a second rebar element having a male thread between a stop shoulder and the end of the rebar. The bar length between the stop shoulder and the male threaded bar end is shorter than the length of the internal thread. The male thread is turned into the internal thread and the first rebar is torqued against the stop shoulder to near the elastic limit of the bars to elastically deform the male and female threads into more uniform contact along their opposing thread surfaces thereby increasing contact area between the threads to reduce or eliminate relative axial movement between the rebars under cyclic axial loading, such as seismic loading.

Abstract: Disclosed is a combination hybrid splice sleeve which has a threaded end for making a mechanical joint with a male thread on a rebar end, and an opposite end open for receiving a second rebar, which need not be threaded, for making a grout joint between the sleeve and the second rebar. This sleeve has a tapering cross section between a wide end and a narrow end, with internal radial ridges of constant height spaced between the two opposite ends. A threaded cylindrical bore is axially aligned in the wide end for screwing to a first rebar. The narrow end is open for receiving a second rebar. Two grout ports open radially into the sleeve. The first grout port is near to the narrow end, and the second grout port is proximal to the threaded bore. The second grout port is of smaller aperture than the first grout port, for partially restricting out flow of grout injected through the first grout port, to encourage filling of the sleeve by building up some back pressure.

Abstract: The threaded end of a concrete reinforcement bar is enlarged in diameter so that the thread bottom exceeds the diameter of the surface ribs of the rebar. A coupler sleeve can then be advanced past the end threading and over the rib area, until the rebar end protrudes from the coupler sleeve. This allows splicing of two rebars without axially turning either rebar. Alternatively, the thread bottom does not exceed the maximum diameter of the rib deformations of the rebar but an immediately adjacent rib segment is flattened without removing rib material to preserve the net cross-sectional area of the rebar and maintain the tensile strength of the rebar. A pilot nose of reduced diameter leads the threaded portion into the female thread to facilitate thread alignment and can support a free standing rebar on a female coupling before engaging the threads.

Abstract: A kit of parts and method for setting a hoist anchor in a poured concrete structure includes a hemispherical rubber void body having an anchor head receiving cavity therein, the body including the cavity being partially split into two quarter sphere halves hingedly joined at a flat side of the body to allow hinging separation of the halves for insertion of an anchor head into said cavity, and a mounting stud threaded into a washer inside the void body cavity for drawing the center of the flat side against a concrete forming member thereby to flatten the flat side and urge the halves against each other to seal the void body against fluid concrete. Four variants of the kit are disclosed.

Abstract: The device is an improved hoist coupling for use with anchors having an anchor shaft terminating in an anchor head and embedded in a concrete load in such a way that a portion of the anchor shaft and the anchor head is exposed and protrudes from the concrete body. The couple comprises a coupler body having an underside which is oriented towards and is seated against the load to be lifted, a socket formed in the upper side of the coupler body, in which socket is defined a ring bearing surface, and a hole in the underside of the coupler body opening into the socket for receiving the head of an anchor.

Abstract: Rebars to be embedded in a monolithic concrete structure are spliced together; also deformed rebars are spliced together across an expansion joint or construction joint between two or more monolithic concrete pours in that one rebar is provided with a threaded receiver barrel, possibly having a flange, and into which is introduced the, preferably, expanded and threaded end of the other rebar; no third splicing element is involved. Short rebars with a receiver at one end can also serve for defining anchor points in the outer surface of a concrete structure.

Abstract: A flared tube sitting on a base is embedded in a concrete slab, and a casement on a shackle can be inserted into the tube to make up the coupling. The casement holds a plunger which can be locked into a position in which its head urges balls out of the casement for engagement with the flare tube. The plunger lock includes a fork locking the casement to the plunger at the other end. The plunger head has a conical tip so that upon retraction the balls can be retracted to release the coupling or to insert the casement to make up the coupling. The flared tube is clamped down onto the base which in turn is constructed for fastening to re-bar structure in the concrete.

Abstract: A joist hanger has a shroud with a rear wall and side walls with aligned openings for receiving the legs of a U-shaped pin. A jack screw, straddled by the legs, or a simple support plate rests on the pin to support a joist end. An L angle piece is welded or hinged to the rear wall. The level of the joist can be changed by the jack screw, and/or by turning a threaded hinge bolt, permitting the shroud to ride up or down on the bolt.

Abstract: A joist hanger has a shroud with a rear wall and side walls with aligned openings for receiving the legs of a U-shaped pin. A jack screw, straddled by the legs, or a simple support plate rests on the pin to support a joist end. An L angle piece is welded or hinged to the rear wall. The level of the joist can be changed by the jack screw, and/or by turning a threaded hinge bolt, permitting the shroud to ride up or down on the bolt.