Abstract: A pivoting mechanism for a spring hinge includes a pin and at least one cap assembly. The pin defines an axial direction and is configured to be disposed through a barrel portion of the spring hinge. The at least one cap assembly is disposed on an end of the pin and includes a cap body, a restricting member and an engaging member. The cap body includes a first abutting wall lateral to the axial direction, a first circumferential wall extending around the axial direction and connected with the first abutting wall and a groove recessed on an inner surface of the first circumferential wall. The restricting member is embedded within the groove and radially protrudes beyond the inner surface. The engaging member surrounds the pin and is disposed between the restricting member and the first abutting wall.

Abstract: A kit for forming a garden structure, includes connecting bodies and connecting joints. The connecting bodies include a first connecting body having a first open end, a second connecting body having a second open end, and a third connecting body extending between a third open end and a fourth open end. The connecting joints include a first connecting joint and a second connecting joint. The first connecting joint includes a first base, a first extending body dimensioned to fit with the first open end of the first connecting body and a second extending body dimensioned to fit within the third open end of the third connecting body. The second connecting joint include a second base, a third extending body dimensioned to fit within the second open end of the second connecting body, and a fourth extending body dimensioned to fit within the fourth open end of the third connecting body.

Abstract: A locating pin assembly for coupling a first modular frame to a second modular frame is disclosed. The locating pin assembly has a first gusset plate positioned between the first modular frame and the second modular frame. The first gusset plate has a first gusset plate aperture and a second gusset plate aperture for receiving fastening means for coupling the first-modular-frame-first-beam and the second-modular-frame-first-beam the gusset plate. The pin assembly also has a pin engaging the first gusset plate, the first modular frame and the second modular frame. Also disclosed are modular frame units having the pin assembly, system of modular frame units having the pin assembly and a method of coupling modular frame units.

Abstract: A lower connector includes a lower connector hollow body, a pair of lower connector bosses coupled to the lower connector hollow body, and a pair of lower connector arms coupled to the lower connector bosses. A connector assembly includes an upper connector coupled to a lower connector and a gusset plate sandwiched between the upper and lower connectors.

Abstract: A connection node assembly for use in connecting an upper prefabricated building module to a lower module. Hollow vertical edge supports of the building modules have top and bottom connection parts. A connecting bolt can be passed through the top part of an upper vertical support in the upper building module and seated within the bottom part of that vertical support with the shank extending downward. The shank engages a threaded aperture in a connecting nut secured within the top part of a corresponding lower vertical support in the lower building module. Diaphragm plates sandwiched between the upper and lower vertical supports are used to tie horizontally placed modules together.

Abstract: A wedge anchorage includes the components needed to secure three fiber-reinforced polymer (FRP) plates and six FRP tendons. The components include an outer barrel, two inner barrels, two outer wedges, two inner wedges, and two middle wedges. Two sets of three FRP tendons are secured in through holes formed between the respective upper and lower outer wedges and upper and lower inner wedges. A first FRP plate is secured between the upper inner wedge and a middle wedge, while a second FRP plate is secured between the lower inner wedge and the other middle wedge. The third FRP plate is secured between the two middle wedges.

Abstract: A connector assembly, having an upper connector, a pin coupling the upper connector to a lower connector and a gusset plate sandwiched between the upper and lower connectors. Also, disclosed is a hoistable connector assembly, a lifting frame assembly, a coupling system for modular frame units, a method for assembling a module unit using the connector assembly, and a modular frame unit and building having the connector assembly.

Abstract: A tool comprising a nubbin, or projection, is used to press on a recessed pushbutton of a shaft coupler. In one embodiment, a circular structure or a C shape structure fits a finger of the user's hand. A nubbin extends from the structure exterior. An arch, or a pair of projections, extend transversely to the user finger length, to contact one or both adjacent fingers during use and limit rotation of the tool. Another embodiment comprises a first element and a second element, each comprising two arches connected end-to-end; the two-arch openings face each other. To fit different diameter fingers, the spacing between the two elements is adjustable; a shaft integral with one element slides within a boss that is integral with the other element.

Abstract: A fastener unit and related method for securing a board to a support is provided. The fastener unit includes a spacer block, a grip element extending from the spacer block and configured to fit in and engage a groove of the board, and one or more resilient compression elements extending from the spacer block. The one or more resilient compression elements can be a joist leg configured to engage a joist, or it can be vertically compressible toward a first plane that is transverse to a vertical axis of the spacer block so that portions of it can compress from an open mode to a compressed mode and fit within, then forcibly expand within the groove, thereby securing the spacer block in a position adjacent the groove to establish a gap between the board and another board. A related method of use also is provided.

Abstract: In a first aspect there is disclosed a reinforcing spacer (10) for use in constructing a concrete slab. The spacer (10) includes a first reinforcing arm (12) having a first arm base (16), a first arm wall (18) and a first arm support surface (20) provided on the first arm wall (18). The spacer (10) further includes a second reinforcing arm (14), transverse to the first reinforcing arm (12). The second reinforcing arm (14) has a second arm base (22), a second arm wall (24), and a second arm support surface (26) provided on the second arm wall (24). The first arm support surface (20) includes a first arm recess (36), and a first arm inclined surface (46) which slopes towards the first arm recess (36). The second arm support surface (20) includes a second arm recess (56) and a second arm inclined surface (60) which slopes towards the second arm recess (56). In use the spacer is located on a top surface of a pod to support a reinforcing mesh.

Abstract: Disclosed herein are various methods, systems, and devices relating to vertical structural supports, including acute Z-shaped piers and further including vertical structural features that provide additional structural support for various types of piers.

Abstract: A ceiling grid strut is provided that includes a rail and a strut channel that is integral to the rail. A ceiling grid assembly is provided that includes a first ceiling grid strut, a second ceiling grid strut, a first threaded fastener, a second threaded fastener, and a connector.

Abstract: A lift system includes a trolley member defining an aperture extending through the trolley member, a locking unit coupled to the trolley member, the locking unit including a locking unit body and a pin that extends outward from the locking unit body, where the pin is repositionable between an engaged position, in which the pin extends through and outward from the aperture of the trolley member, and a disengaged position, a cable extending between and terminating at an actuator end that is engaged with the actuator and a subject lift end positioned opposite the actuator end, where the cable is selectively drawn to the trolley member or paid out from the trolley member upon actuation of the actuator, and a subject lift connecting member coupled the subject lift end of the cable.

Abstract: A connector assembly, which in one embodiment has an upper connector and in another embodiment has a lower connector. The assembly can have a gusset plate sandwiched between the upper and lower connectors. Also, disclosed is a hoistable connector assembly, a lifting frame assembly, a coupling system for modular frame units, a method for assembling a module unit using the connector assembly, and a modular frame unit and building having the connector assembly. Also, a system for coupling adjacent modular frame units for forming a modular building and a method for coupling modular frame units for forming a modular building are provided.

Abstract: A hinged connector is used to attach two generally coplanar first and second structural members while allowing for pivotal movement of the structural members in the plane of the structural members about an axis that is transverse or perpendicular to the plane in which the structural members rotate.

Abstract: A kit of parts for forming a kitchen unit (100) includes a first frame component (110) having a plurality of tubular edge elements (111-114), a second frame component (120) having a plurality of tubular edge elements (121-123) and a plurality of tubular legs (130,140). The plurality of tubular legs include a plurality of end legs (130), to be secured to the first frame component 110 in a recess (116) disposed between adjacent edge elements (111-114) of the first frame component (110) and a plurality of intermediate legs (140) configured to be secured to the first frame component (110) and the second frame component (120) in a recess defined by an edge element (111-114) of the first frame component (110) and an edge element (121-123) of the second component (120). The kit of parts permits a wide range of kitchen units, such as free-standing towers and islands, to be assembled from a relatively small set of basic components.

Abstract: A system is provided for releaseably connecting a first device housing with a second device housing. The system includes at least three connection units, wherein each of which includes a headed bolt and a corresponding keyhole-shaped recess. The keyhole-shaped recess is configured for receiving the headed bolt such that the headed bolt can be inserted into the recess in a first section and held in the recess in a second section. At least one of the connection units includes a locking mechanism configured for locking the bolt in the second section of the recess. The locking mechanism includes a movable locking element which is movable with respect to the headed bolt and configured to hold the headed bolt in the second section of the recess in a locking position. Another configuration uses a corresponding connection arrangement includes such a system.

Abstract: A connection node assembly for use in connecting an upper prefabricated building module to a lower module. Hollow vertical edge supports of the building modules have top and bottom connection parts. A connecting bolt can be passed through the top part of an upper vertical support in the upper building module and seated within the bottom part of that vertical support with the shank extending downward. The shank engages a threaded aperture in a connecting nut secured within the top part of a corresponding lower vertical support in the lower building module. Diaphragm plates sandwiched between the upper and lower vertical supports are used to tie horizontally placed modules together.

Abstract: A mirror system is disclosed. The mirror system can include a primary mirror, and a secondary mirror supported relative to the primary mirror. The primary mirror and the secondary mirror can have different coefficients of thermal expansion (CTE). A negative CTE strut is also disclosed. The negative CTE strut can include a main body portion. The negative CTE strut can also include a first coupling portion and a second coupling portion disposed opposite one another about the main body portion and defining a strut length. The first and second coupling portions can each be configured to interface with an external structure. In addition, the negative CTE strut can include an offsetting extension member having a first end coupled to the main body portion and a second end coupled to the first coupling portion by an intermediate extension member. The first end can be between the first coupling portion and the second end. The first and second ends can define an offset length parallel to the strut length.

Abstract: A shroud for a turbomachine stator includes a first portion and a second portion configured to sandwich around at least a portion of a stator vane assembly, a first pin hole defined in the first portion at an angle relative to an axial direction of the turbomachine, and a second pin hole defined in the second portion at the angle of the first portion, wherein the first pin hole is aligned and in communication with the second pin hole to accommodate a pin configured to be seated in the first and second pin holes.

Abstract: Disclosed is a precursor for a clip and a clip formed by the precursor. The clip is configured for mounting a furring channel to a load-bearing member and is a generally U-shaped member having a pair of sidewalls, each of which includes a pair of tabs projecting therefrom. The clip is arranged to receive the load-bearing member between its sidewalls, such that the tabs can be snap-fit under inwardly directed flanges of the furring channel. Also disclosed is a method of forming the clip from the precursor, by bending portions of the precursor to form the sidewalls of the clip, and a method for mounting a furring channel onto a load-bearing member using the clip.

Abstract: A combined composite and metal hybrid component and a method of forming said component, are disclosed, the component comprising a substantially sheet-like or web-like body portion, made of a composite material, at least one stiffening member made of a metal and at least one made of a composite material, and curing the component in a vacuum bag, such that the metal stiffening member is formed against the composite stiffening member and the metal stiffening member remains a part of the hybrid composite component.

Abstract: A set of components that can be used to construct a structurally sound dock are disclosed. The components can be extruded and the components are shaped such that interconnected components provide support for the other components thereby alleviating weak points due to welded only joints. A fascia channel provides additional strength by including structures that improve the vertical and horizontal strength of the fascia channel. HDPE plastic inserts and sheaves provide sound dampening for metal to metal contact points. Other components include a corner connector, a post system and a hinge system. The focus of this disclosure is the corner connector.

Abstract: Roof brackets for attaching a structure such as a patio cover to a building, and methods for installing the brackets. The brackets have a saddle for receiving a support beam of the structure. The brackets can be attached to the building roof, but do not penetrate the roof substrate, thus preventing leakage and other structural problems. The roof brackets comprise a plate that is installed between the roof substrate and the shingles or tile on the roof. The brackets are available in different configurations depending on the roof pitch for easy installation. One roof bracket has a riser so that the saddle is lifted above the roof. Another roof bracket is configured so that when installed the saddle is located beyond the edge of the roof. Other brackets can be attached to the rafters under the roof. These also come in different configurations depending on roof pitch, and they are configured to extend below and outward from the fascia.

Abstract: A mounting system for mounting an external structure, such as a deck, with a building includes an anchor frame that couples with structural elements of the building and a bracket that couples with both the external structure and the anchor frame for securement. The anchor frame includes a plate element configured for mounting against a board of a building and anchor elements extending from the plate element and configured for mounting against a second board of a building. The bracket has a first face portion configured for coupling with the anchor frame and a second face portion spaced from the first face portion and configured for mounting with an external structure.

Abstract: The present invention relates to a prefabricated construction system and method, for erecting constructions by means of the assembly of prefabricated structural elements obtained by cutting flat materials, forming structural nodes by means of coupling at least a first coupling configuration formed by first slots made in a plurality of parallel boards forming a first structural element with at least a second coupling configuration formed by second slots made in a plurality of parallel boards forming a second structural element, providing a structural core in the form of an array having interstitial openings going through it which allow the coupling of third and fourth coupling configurations of third and fourth structural elements.

Abstract: The present disclosure relates to systems and methods for providing self-standing, self-supporting, rapid-deployable (S4RD) towers for communications and similar applications, and in particular to ballast base systems that enable the self-standing, self-supporting, rapid-deployable features while eliminating the need for a permanent foundation for the tower. Novel and inventive tower designs, wherein a user may climb through an interior volume of the tower while using the tower structure as both ladder and man cage, are also disclosed.

Abstract: The invention provides suspended or “dropped” ceiling systems based upon the use of standard inverted T-bar lattices. The ceiling panels are constructed from two pieces which, when assembled in place, capture the T-bar in a manner that prevents the panels from shaking loose. A suspended ceiling assembled with the panels of this invention will withstand the forces of an earthquake without experiencing panel drop-outs, and the ceiling will remain intact so long as the T-bars remain suspended from the structural ceiling above. The panels of the invention can, in preferred embodiments, carry lighting fixtures, and the required wiring can be installed and concealed below the T-bars rather than within the plenum space.

Abstract: A method and apparatus for forming a formwork for a ribbed or waffle concrete slab is provided. The apparatus includes a rectangular block having a ledge around the base, the ledge having a dimension of half the desired width of the base ribs of the concrete slab, and a keystone connector. The keystone connector has an engagement portion configured to attach to an engagement portion on each block. In a method, the blocks are laid out so that the ledges of adjacent blocks are in contact. A keystone connector is then placed at each intersection of four blocks by attaching the respective engagement portions of the keystone connector and each block so that the keystone connector holds each of the four blocks in place relative to one another. The keystone connector is also configured to retain a reinforcing rod laid in the channel between adjacent blocks.

Abstract: Disclosed is a precursor for a clip and a clip formed by the precursor. The clip is configured for mounting a furring channel to a load-bearing member and is a generally U-shaped member having a pair of sidewalls, each of which includes a pair of tabs projecting therefrom. The clip is arranged to receive the load-bearing member between its sidewalls, such that the tabs can be snap-fit under inwardly directed flanges of the furring channel. Also disclosed is a method of forming the clip from the precursor, by bending portions of the precursor to form the sidewalls of the clip, and a method for mounting a furring channel onto a load-bearing member using the clip.

Abstract: A shelving structure may include at least four vertical posts, at least four annular spacers, and at least a shelf board, and the posts are configured to be mounted on the shelf board through the annular spacers. The shelf board has a frame and a panel, and a convex portion is formed at an inner edge of the frame. At least eight horizontal supporting boards are formed at four upper edges and four lower edges of the frame respectively. Each two adjacent supporting boards are not connected to each other, and each of four corners of the frame is bent to form a concave groove. Moreover, four arc boards are respectively assembled with the four concave grooves, and each of the arc boards has two wings configured to be welded with the convex portion of the frame to improve the structural strength of the shelving structure.

Abstract: An assembly outdoor balcony are made up of a plurality of columns, cross beams, beams, adjustable hanging elements, wall-assembled hanging elements and balcony panels, wherein the columns are disposed at interval to form the whole periphery of the balcony; the cross beams can be quickly assembled onto the columns through a beam hanger; the adjustable hanging element allows the joint angle between two beams to be different depending on the environment and needs. All component elements are aluminum alloy materials, which are assembled by mutual engagement. Therefore, the assembly outdoor balcony can be assembled, disassembled and adjusted quickly based on the on-site environment.

Abstract: An upper joint of a wing assembly of an aircraft includes an outboard upper wing panel, a center upper wing panel, a rib, and an upper joint assembly operatively interconnecting the outboard upper wing panel, the center upper wing panel, and the rib. For a substantial fore/aft span of the upper joint, a first subset of a plurality of center upper stringers is operatively coupled to the upper joint assembly, and a second subset of the plurality of center upper stringers terminates without being directly coupled to the upper joint assembly.

Abstract: A strut connector for use with a hollow strut having at least one a pair of opposed openings formed in the strut. A pair of identical connector portions are rotatably coupled together, with one of the connector portions inverted. Each connector portion is a flat blade having a body portion and an arm portion extending from the body portion. The body portion has a first hole and a second hole. The arm portion has at least one tab extending from the arm portion at an angle. The arm portions are coupled together via the first hole, then rotated to engage respective openings on the strut with the tabs. The second holes are aligned and a fastener secured through the second holes.

Abstract: A method of forming an assembly including a first workpiece having a surface provided with a mortise and a second workpiece provided with a tenon inserted into the mortise joining the workpieces together in which the second workpiece is disposed in a certain orientation relative to the first workpiece to provide a certain disposition of the workpieces when joined together, generally consisting of providing identifying marks on the surface of the first workpiece and the tenon of the second workpiece at locations assuming a certain disposition when the second workpiece is disposed in a certain orientation and the tenon is registered with the mortise; positioning the second workpiece relative to the first workpiece wherein the second workpiece is disposed in the certain orientation relative to the first workpiece, the tenon is registered with the mortise and the marks are disposed in the certain mark disposition; and displacing the second workpiece toward the first workpiece and inserting the tenon into the mort

Abstract: An upper joint of a wing assembly of an aircraft includes an outboard upper wing panel, a center upper wing panel, a rib, and an upper joint assembly operatively interconnecting the outboard upper wing panel, the center upper wing panel, and the rib. In some embodiments, outboard upper stringers may be configured differently than center upper stringers. In some embodiments, a subset of the center upper stringers may not directly oppose the outboard upper stringers. In other embodiments, for at least a substantial fore/aft span of the upper joint, each of the center upper stringers may directly oppose an outboard upper stringer.

Abstract: A fastening system includes a removable stud and a retaining plate. The removable stud includes a threaded portion configured to be removably threaded into a threaded bore of a housing, a shank portion arranged coaxially with the threaded portion and configured to be inserted through a bore of a housing of a line replaceable component, and an anti-rotation portion disposed between the threaded portion and the shank portion. The retaining plate is configured to be mounted between the housing and the line replaceable component. The retaining plate includes a mating hole configured to mate with the anti-rotation portion of the removable stud.

Abstract: A tubular frame assembly for a door type warewashing machine includes four tubular legs, and two upper cross-braces and two lower cross-braces. The cross-braces are received through cross-brace receiving openings in the tubular legs, and the cross-braces are bolted together within the legs by nut and bolt assemblies.

Abstract: A perimeter trim attachment clip formed as a single piece sheet metal stamping, the clip having a base, top and bottom rearwardly extending trim engaging grips on the base, the grips having a free edge distal from the base adapted to engage respective top and bottom hems of a perimeter trim channel, a standoff projecting rearwardly of the base beyond the grip edges, the standoff being adapted to abut the side of a grid runner extending parallel along the periphery of a free edge of a ceiling, a squaring tab connected to the base and configured to extend over the parallel extending grid runner and be attached to a reinforcing bulb of a grid runner intersecting the parallel grid runner.

Abstract: A photovoltaic (PV) module framing and coupling system enables the attachment of PV modules to a roof or other mounting surface without requiring the use of separate structural support members which attach directly to and span between multiple PV modules in a formed PV array. The apparatus provides a parallel coupling for securely interlocking the outside surfaces of parallel frame members together in a side to side arrangement to form an array with improved structural load distribution. The coupling may attach to a slot in the frame at substantially any position along the length of the frame thereby enabling the interconnection of adjacent PV modules along both an x and y axis. The apparatus may further provide a rotating portion and locking portion, mounting brackets for direct connection to a mounting surface, grounding teeth, and a twist-lock engagement means for interlocking and aligning PV modules in the array.

Abstract: A supporting base for an angle iron post includes an angle bar and a column. The angle bar has two walls arranged at right angle to each other to be attached to two respective walls of the angle iron post. The column is disposed in between the two walls of the angle bar and has an upper small-diameter section, a lower large-diameter section and a shoulder defined at the junction between the upper small-diameter section and the lower large-diameter section. As such, the two walls of the angle iron post are allowed to be rested on the shoulder of the column and held in position between the walls of the angle bar and the upper small-diameter section of the column.

Abstract: A post-and-beam type structure includes: a connector having four plate portions forming a cruciform cross-section for the connector, the cruciform cross-section extending in a vertical direction, wherein the four plate portions define four quadrants; a first column configured for detachably coupling to a bottom portion of the connector; and a first beam with a first end configured for detachably coupling to a first one of the plate portions; wherein the first beam comprises a first beam member and a second beam member that are coupled to each other, and wherein the first end of the first beam is configured for placement in a first quadrant of the four quadrants.

Abstract: A joining connector is provided which can be fitted by the turning part of the frame bar of the shelf board. The joining connector includes a base plate having inner and outer sides. Recessed joining parts are formed on the outer side and define a vertical and a horizontal wall. The vertical wall and horizontal wall can match the outer edge of the turning part of the frame bar. Limiting projections are formed on the outer side of the base plate in a preset concrete shape, and located on a position between but spaced from the vertical and horizontal walls of the recessed joining part, so that the turning part of the frame bar can be pushed and fitted into the recessed joining part from the direction of the outer side of the base plate, and the limiting projection can correspondingly limit the inner edge of the turning part.

Abstract: The invention relates to an end piece (11) of a windshield wiper comprising at least one wiper blade (1). Said end piece (11) has a first part (12) and a second part (13) which are connected to each other by a removable attachment means, and a blocking means (28) for preventing the wiper blade (1) from moving relative to the end piece (11), said blocking means (28) comprising a securing device (33) and an actuating element (51). The securing device (33) is designed to pinch the wiper blade (1) and is subject to a force exerted by the actuating element (51). The end piece is for use in motor vehicles.

Abstract: A member-fastening structure permits three members to be fastened and fixed such that a first member and a second member holds a third member therebetween. The fastening of three members is accomplished with a meter visor that has a first through-hole formed therein. A speaker ring has a projecting part formed thereon which is inserted into the first through-hole. The projecting part has a second through-hole formed therein in a direction perpendicular to a projecting direction of the projecting part. A speaker grille is positioned on the meter visor, and the projecting part of the speaker ring is then caused to project downward through the first through-hole of the meter visor. A clip is inserted into the second through-hole of the projecting part projecting from an underside of the meter visor, and is engaged with the second through-hole of the projecting part and the underside of the meter visor.

Abstract: A construction for a boom such as a dragline boom provides a spade plate that connects lacing members to a main chord at a cluster. The spade plate is curved. One edge of the spade plate has tabs attached to the lacing members. Another edge of the spade plate is attached to the main chord. The spade plate may be applied for new construction or repair.

Abstract: A connector for a modular rack includes a base and a plurality of connecting members. The base includes a connecting pipe which has a circular inner passage, and the inner passage has a top open end and a lower open end larger in diameter than the top open end. The base includes a connecting platform, on which is formed a plurality of upward-extending stop pieces alternatively disposed with respect to the connecting portions, and between each of the stop pieces and the connecting pipe is defined an inserting slot. The connecting members each include an engaging portion and two lateral wing portions. The engaging portion is inserted in the connecting portions, the rear surface is abutted against the connecting pipe, and the two wing portions are inserted in the inserting slots, and between front and rear surfaces of the connecting members is formed an inserting hole.

Abstract: Building or structural panels may be joined, such as to form walls or floors. The panels may be connected in various orientations via one or more connectors. The connectors may mount to anchors associated with the panels. The panels may have outer skins located over an expanded core comprising a matrix of supporting elongate members and voids or openings, with the anchors located at edges of the panels.

Abstract: Described herein is a structure that comprises a plurality of spherical triangular units on a plurality of levels. The structure has a superior ability to survive disasters such as tornadoes, hurricanes, earthquakes etc. It is cost-efficient, energy efficient, extremely durable and easily maintained. The plurality of spherical triangular units on one level of the plurality of levels are essentially identical to each other, and are essentially equally spaced radially relative to a center of the sphere; each of the plurality of spherical triangular units comprises three planar panels, each with an end surface comprising a minor arc of a great circle of the sphere; a spherical triangular unit on a level above the first level of the structure is configured to be joined with two neighboring spherical triangular units on the level below; the structure is substantially a dome.

Abstract: A compression lock on a connector for a shelving post has upper and lower, mating collar parts having distal ends encircling more than 180 degrees of the post but separated by a gap through which the post can pass. Each distal end has an axially extending projection with a rounded end and a recess adjoining the projection. The projections of one collar part mate with the recesses of the other collar part to interlock the collar parts around a compression sleeve and form a frusto-conical inner surface that wedges the a mating sleeve against the post to affix a shelf attached to the connector.