Abstract: The invention provides for a connection system for structurally connecting horizontal frame members and vertical supports. The system includes connector pairs and supports, frame members and connector pairs for accommodating the frame members and the supports. The connector pair has an axial bore for accommodating a connection screw and the supports include a threaded bushing in the end section for accepting the connection screw. The cylindrical connector pair has notches, adapted to accept the frame members. The cylindrical connector pair includes a plurality of vertical bores circumferencially arranged about the axial bore. The frame members include in the connection section a locking element, the locking element is adapted to fit into one of the bores of the connector pair. The connector pair, the frame members and the supports are structurally connected by tightening connection screw in the threaded bushings.

Abstract: A quick erect shelter frame includes a plurality of one piece hubs. Each hub including a base portion having peripheral edges, an upper surface, a lower surface, and a center portion with a hole extending therethrough in a direction perpendicular to the upper surface. Each hub further including a plurality of spaced support members, each extending from the upper surface of the base portion substantially flush with a respective peripheral edge. Each support member having a top surface, a length less than the length of one peripheral edge of the base portion, a hole extending through a first end of the support member in a direction perpendicular to a face surface thereof, and a bore extending in a side of a second end of the support member in a direction perpendicular to the hole in the first end. The hole of each support member being axially aligned with the bore of an adjacent support member.

Abstract: A continuity tie for providing both tension and compression resistance to externally induced movement of building structural members. A central body member is provided with a plurality of bolt mounting apertures in a staggered pattern and a pair of end plates having a rod aperture. One embodiment employs a tubular central body member having a hollow interior; another embodiment employs a generally U-shaped central portion with flanking flanges. Both embodiments can be mounted to building structural members separated by an intervening building structural member, with the continuity ties being secured together by means of a single rod arranged in the rod apertures in each continuity tie and secured in place by means of nuts. The staggered bolt patterns reduce the probability of mounting all bolts in a defect region of a timber building element. The hollow tube embodiment is symmetric and cannot be installed backwards. The rod aperture may be centered or offset from the central axis of the continuity tie.

Abstract: A connector for square or rectangular tubing. The connector consists of a cubic or otherwise appropriately shaped block with projecting sections in each direction where tubing is intended to be connected. The projecting sections fit loosely inside the tubing. Each projection has an internal cam that is rotated in place to drive radial pins outward to engage the inner surface of the tubing. Cam rotation is accomplished by screw means that are mounted transverse to the axis of the tube and engage the cam tangentially. In some embodiments, additional screw means engage the cam to cause contrary rotation to disassemble the connection.

Abstract: A spiral staircase includes a shaft pole for the staircase, a plurality of arms spirally connected to the outer periphery of the shaft pole, treads fixed to the upper surface of each arm, a plurality of balusters fixed to the outside end portion of a plurality of arms in parallel with the shaft pole, and a plurality of handrails mounted and connected between the balusters pillars, wherein each of the arms is connected to the shaft pole by an arm connecting metal, each baluster is connected to each arm by a baluster connecting metal, and the baluster and the handrails are connected by a handrail connecting metal. Since the connecting metals are used for the connection between the shaft pole and the arms, between the arms and the balusters and between the balusters and the handrails, connection and assembly of the spiral staircase can be carried out easily, reliably and firmly without requiring skilled labor, and the cost of the production and high operation efficiency can be accomplished.

Abstract: The foldable stool has a triangular shaped seat with three upper legs attached to the corners of the seat. A leg holder is attached to the bottom portion of each upper leg. The leg holders define a lateral opening that has an asymmetrical shape. A Y-shaped central connector units holds the leg holders together. The connector has irregular shaped extensions that are insertable into the irregular shaped lateral openings of the leg holder when the leg holder is turned into a first position. After being inserted, the leg holder may be rotated into a second position to securely hold the leg holder and so that the upper leg can be inserted into the leg holder and rest on a circular seat or flange that is disposed inside the leg holder. Lower legs are inserted into the leg holders. When it is desirable to collapse the foldable stool, the lower legs are pushed into the upper leg by pressing the knob to disengage the knob from the leg holder.

Abstract: A crossmember defines guide surfaces to receive a leg tip. Preferably a screw, cam or lever applies nonimpulse force to wedge the tip against the surfaces. The tip is preferably unthreaded, exclusively noncircular in at least external cross-section, and very generally aligned with the leg axis. Preferably the screw or the like pulls the tip length-wise into the crossmember without rotating or threading the tip into the surfaces, and also retains the tip wedged in place. Also preferably a notch or analogous traction feature is formed in the leg or crossmember, and the screw (distinct from the tip) threaded to the other. The screw engages the notch to force the tip into the crossmember.

Abstract: A joint able to join three members. The joint is formed by each member having at least one channel of a width generally equal to the thickness of a member to be joined to it and a length generally equal to the width of a member to be joined to it. There is a recess in each member positionable so that, when constructed, the joint has a pathway formed by said recesses. A locking member is received by said pathway to lock the joint.

Abstract: A corner joint element 1 for longitudinal bars 7 and cross bars 8 that are created from hollow profiles 10 of a rack has three legs 2, 3 and 4, which are standing at right angles to each other. The surface of each leg 2, 3, 4 has at least one cavity 11. For the fastening of a hollow profile 10, slipped onto a leg 2, 3, 4, the wall area 12 of the hollow profile positioned above the cavity 11 is pushed into the cavity 11.

Abstract: A continuity tie for providing both tension and compression resistance to externally induced movement of building structural members. A central body member is provided with a plurality of bolt mounting apertures in a staggered pattern and a pair of end plates having a rod aperture. One embodiment employs a tubular central body member having a hollow interior; another embodiment employs a generally U-shaped central portion with flanking flanges. Both embodiments can be mounted to building structural members separated by an intervening building structural member, with the continuity ties being secured together by means of a single rod arranged in the rod apertures in each continuity tie and secured in place by means of nuts. The staggered bolt patterns reduce the probability of mounting all bolts in a defect region of a timber building element. The hollow tube embodiment is symmetric and cannot be installed backwards. The rod aperture may be centered or offset from the central axis of the continuity tie.

Abstract: An actuator structural body is constructed of standardized columnar bodies connected for moving a workpiece. The Actuator structural body includes actuators shaped as columnar bodies and having T-shaped grooves defined in outer side surfaces thereof, columnar member shaped as columnar bodies and having T-shaped grooves defined in outer side surfaces thereof and through holes defined therein, and joint members for joining the columnar members and the actuators bodies 204, 206, 208, 210 by engaging in the T-shaped grooves or fitting in the through holes in the columnar bodies. The columnar members 202 and the actuators bodies may be assembled or reassembled into a desired shape by the joint members.

Abstract: An articulation hub assembly which connects tubular rod elements comprises the frame matrix for portable collapsible self-supporting prefabricated structures requiring clear span interiors with no supporting columns. In the event a rod element secured by the hub assembly is fractured, the hub assembly is disassembled easily to allow replacement of the rod element.

Abstract: A motor, a ball screw shaft, etc. are accommodated within a frame that forms an outer frame. Direct-acting guides are provided on both sides of a groove-shaped opening defined in the frame. The ball screw shaft is centrally disposed within the frame. A table slides along the direct-acting guides under the action of rotation of the ball screw shaft. The ball screw shaft has ball-screw splines formed over its entire length and both ends thereof supported by the motor and a bearing. The center of rotation of the ball screw shaft is brought into alignment with the centers of rotation of the motor and the bearing by balls inserted into the ball-screw splines.

Abstract: The Structural Fastener is an internal longitudinal, reversible, gear-driven interlocking screw assembly and coupling device. The Structural Fastener uses a spring-loaded, gear driven coupler shaft with a threaded stud that mates with a female threaded socket so as to form an invisible joint that is easily decoupled. The Structural Fastener can be arranged in polar or linear arrays to increase its load-bearing capabilities, its air or water tight sealing capabilities or for redundancy. The Structural Fastener makes a rigid, reliable coupling between coupled members and forms a smooth external splice that is virtually invisible. The Structural Fastener is reversible, reusable, scaleable, precisely torqueable, and can be used with O-rings or sealing gaskets to provide air or water-tight seals.

Abstract: A structural truss, eg to provide support in building, exhibition, display lighting, decorative and other structures, comprises an elongate framework at opposite ends of which are connectors of a common forked form spaced limbs of which have registering holes for a retaining pin or bolt and are disposed to be vertically spaced apart in a normal orientation of the truss in use. The arrangement of the connectors relieves the retaining pins or bolts of at least a substantial portion of the load of, and on, the truss when it is in use. In the illustrated embodiment the connectors enable the truss to be inverted from one orientation to another for use, and two of the trusses to be connected together end to end.

Abstract: A connector system joins together long rods or tubes at various angles to form a wide variety of shelter frames for diverse applications as well as railings, racks, and the like. The diverse connectors required are assembled from modules of the invention which are bolted together in various combinations. The modules fasten at one end to the rods or tubes. The other end of the module terminates in an annular gear adapted to intermesh at an adjustable angle with one or more gears of other modules. Once bolted together the modules form a rigid connector. The modules may be unbolted and reused to form a connector of another configuration. The few module types required to form the many connector configurations reduces inventory and manufacturing requirements.

Abstract: A connector device for interconnecting frame-work profiles provided with internal hollow channels and at least one T-shaped longitudinal slot in end-to-end and end-to-sideface relations includes a generally parallelepiped shaped connector having a through bore which receives one element in the form of a screw that is adapted to be firmly attached to a first framework profile in end-to-end relation thereto and a second element in the form of a T-connector member for effecting connection with a second framework profile. The T-connector member has a thin element that is adapted to pass through the T-shaped longitudinal slot of the second framework profile in a first position of the T-connector member, and to be broader than the slot in a second position of the T-connector member so that the T-connector member is trapped in a cavity in the interior of the second framework profile behind the slot.

Abstract: A modular, removable and versatile metal construction includes each of the following: support, transverse and perpendicular profile elements, connection devices, rigid connection pieces, and rigid connection elements. The support profile element has a core with a central opening, and lateral wings having a pair of projections defining an opening therebetween with two channels. The perpendicular profile element is positioned perpendicular to the support and transverse profile elements. The connection device includes a clamp having first and second parts terminating at different levels at an end region of the device, the parts together defining, in sequence, an end, first opposite projections, first opposite indentations, second opposite projections, and second opposite indentations, the end, indentations and projections providing securing engagement at five contact points within a lateral opening.

Abstract: A device for connecting together elongated construction materials has one or more end-surface connecting parts each for being connected to an end surface of one of the materials and a side-surface connecting part for receiving and being connected to side surfaces of another one of the materials. Each end-surface connecting part has a bolt-accepting hole formed for allowing a bolt to pass through and a counter-bored part formed on the reverse side for receiving therein the head the bolt. The side-surface connecting part has an indentation for accepting therein and being connected transversely to another of elongated construction materials. Bolts are passed through holes in the side-surface connecting part to securely attach it to side surfaces of this another elongated construction material.

Abstract: A modular storage and support assembly uses a platform system that includes vertically disposed support posts. The support post has an extended tubular body and a plurality of symmetrically spaced, radially extending flanges running the length of the tubular body. Each flange has a first portion extending radially from the post and a second portion at the terminal end of the first portion. A slot is defined between each pair of adjacent flanges for receiving vertical panels or other inserts.

Abstract: An improved framework is disclosed supporting a dome above an outdoor dome covering such as an outdoor swimming pool or other outdoor structure. The improved framework provides additional structural support by the inclusion of a circumferential row of rafter-braces connected by four-way connectors and interspersed with a plurality of biased rafter-braces. The biased rafter-braces are composed of a first tube having an open end sized to receive a second tube and to allow slidable and rotatable movement therebetween. A helical compression spring is disposed within the first tube to secure the first and second tubes together so that they provide a telescoping function by urging the first tube into a first four-way connector tube and the second tube into a second four-way connector tube over a range of distances between four-way connectors.

Abstract: A T-shaped connecting piece is provided to enable a front stabiliser and two counter-stabilisers to be fastened on the central bow part of a sports bow. The connecting piece may be screwed in the threaded hole provided in the central bow part for this purpose and may be clamped on the central bow part in the correct rotational position by means of a threaded tube. The counter-stabilisers are shifted further forward owing to the T-shape of the connecting piece, so they do not impair the archer. Owing to the clamped connection between the connecting piece and the central bow part, the transmission of the strong vibrations produced during the firing of an arrow from the sports bow to the stabilisers is optimally guaranteed so excellent shots may be fired.

Abstract: A support system for data transmission lines and the like, comprising a plurality of rail sections, a hub supported at a fixed elevation, and a plurality of rail connectors for connecting the rail sections to the hub in positions in which the rail sections radiate out from the hub.

Abstract: This invention provides a sectional bar system consisting of X-section bars and connecting elements preferably made up of pyramids. The advantages of the invention are a large variety of possible designs and high stability of the sectional bar system as well as easy and inexpensive production of the connecting elements.

Abstract: Push-fit connecting joints comprising a node and at least one hollow section, where the node contains attachment parts and the attachment parts feature openings to accommodate connecting elements, and the hollow section features at least one hollow chamber and at least one opening for the connecting element. The openings in the hollow section are oversized with respect to the corresponding openings in the attachment part and the region of the opening on the outside of the hollow section is covered over by a cover sheet. The cover sheet features for each connecting element an opening having the dimensions of the opening in the attachment part, and an adhesive is provide between the cover sheet and the hollow section. The push-fit connecting joints may be employed in the construction of Space-frame parts.

Abstract: A connector structure for connecting together a plurality of elongated frame bars at their ends includes a main part having three side walls with mutually perpendicular quadrangular outer surfaces and a cover piece also having three side walls with mutually perpendicular outer surfaces such that they together assume a cubic form when they are attached to each other in a closed relationship with an engagement member on the inner surfaces of the three walls of the main part and a protrusion on the cover piece engaged to each other. Each side wall of the main part is provided with a throughhole for passing a screw through such that it can be attached to end surface of a frame bar. Such main part is produced by using only two mold pieces, an upper molding piece with a convex part and a lower molding piece with an indentation. The indentation has three inner surfaces, each making a same angle to the vertical direction.

Abstract: A steel building system, of the type having multiple frames, has at least one truss frame comprising a pair of column steel members, a bottom chord having at least one steel member, two top chord steel members, and at least one brace connected between the top chords and the bottom chord. Connecting plates are provided to connect the various steel members together. Such connecting plates have hole patterns which are juxtaposed with "standard" hole patterns near the ends of the steel members.

Abstract: The invention is a connector for square tubing used in a system of construction and includes many designs but all having a plurality of orthogonal arms connected at a common point and including a wedge block at the end distal from the common point. The arm and wedge block have complementary sloping surfaces that expand the wedge block as it is moved up the slope by a draw bolt which enters the side wall of the arm, crosses the primary longitudinal axis of the arm and exits proximate the opposed wall where it engages the wedge block. The expanded wedge block secures tubing in place over the arm to the arm. The hex head draw bolt is recessed in the arm of the connector.

Abstract: A loft connector joint employed in the construction of lofts includes a hub having a first end, a second end, an outer periphery, and an axial core oriented along a longitudinal axis extending from first end to the second end. The axial core is hollow and configured for slidable engagement with a post of a loft. A plurality of sockets are positioned about the outer periphery of the hub and facing outward from the center of the hub. Each of the sockets are configured for slidably receiving and retaining an edge of a panel of a loft. The second end of the hub has a plurality of ramps. A removable cap may be secured to the hub. The cap is bowl-shaped and has a domed top and an outer wall. A plurality of tabs extend from the underside of the cap, and the tabs are deflectable radially inward from the center of the cap. When the cap and hub are coupled together, corresponding tabs and ramps contact each other during rotation of the cap in relation to the hub.

Abstract: A coupling for a modular construction system whereby a tubular element is linked to another element, or is supported, characterised by: 1) at least one cup-shaped unit (P, 22, 41, 61, 81, 102) having an open end (16) and a reduced end (12); the open end (16) serving to received an end (E) of a tubular element (T) to enable the end (E) to be pushed to a rest position (18) at the reduced end (12) of the cup-shaped Unit (P), and locking means (30) enabling a tubular element end (E) to be retained against further movement relative to the cup-shaped unit (P); the length (L') of the unit (P) being between one and one half and twice the outside diameter (D) of the tubular element (or of the major transverse dimension of the tubular element if it is of non-circular cross-section); and an aperture (13) at the reduced end (12) of the cup-shaped unit which is no more than one-half the maximum interior diameter (I) or maximum interior dimension of the cup-shaped unit (P); 2) the or each cup-shaped unit (P, 22, 41, 61, 81

Abstract: A connector structure of assembled house truss is disclosed. The respective support members of the house truss are inserted and fixed in the connector by screws so that the support members can be quickly and easily assembled by a general person to form the house truss without welding operation and using any power.

Abstract: A coupling apparatus for securing bars or boards together so as to form an article of furniture. The apparatus includes a tube engaged between the members to be secured together. Two blocks are secured to each of the members and engaged inwards of the tube. Two slides are slidably engaged in the tube and are forced toward each other in order to engage with the blocks and so as to secure the furniture members together. The slides and the blocks include wedge-shaped engaging portions engaged with each other so as to prevent the slides from rotating relative to the blocks.

Abstract: A connector assembly for releasably interconnecting a plurality of elongated hollow bodies at an angle to each other, comprising a rigid connector element having a central base portion and a plurality of mutually angular legs extending from the base portion, a plurality of partitions or partial partitions carded by the base portion, each partition having an opening for receiving a shank type of fastener and further including at least one elongated hollow body, a boss integral with and disposed within the interior of the hollow body for receiving the shank of a fastener which is received in the opening in the partition.

Abstract: A geometric toy construction system has a multiplicity of flat, regular polygonal construction panels interengageable edge-to-edge by means of shared but separate intervening cylindrical axles positioned parallel to the edges of the panels and attached thereon, thereby enabling the building of two- and three-dimensional constructions. One axle enables up to six panels to be snap-fit into position about the axis of their commonly shared axle.

Abstract: An individual temporary shelter apparatus is an apparatus which can act as a bed, lounge or chair with a complete enclosure including windows for cross ventilation, capable of withstanding wind and precipitation. The apparatus seals against insects and noxious fumes. The apparatus is portable in that it is entirely collapsible to a frame like that of a backpack and includes pockets and shoulder straps and a belt for supporting the frame on the back of the user much like a conventional backpack.

Abstract: Disclosed is an actuator having a frame in which a drive source and a slider displaced under the action of the drive source are held, and an actuator arrangement comprising a plurality of actuators connected to each other by connecting devices. A beam member, which constitutes the frame, has a concave portion defined in a side thereof and the drive source is held in the concave portion. A slider base is held in the concave portion and includes the slider displaced along the concave portion. A cover is used to cover the concave portion defined in the beam member. The beam member has grooves defined in respective outer sides thereof, which have substantially T-shaped cross sections and enable other beam members to be mounted to the beam member. The grooves are defined along the longitudinal direction thereof so as to be substantially identical in structure to one another.

Abstract: A method of joining a plurality of generally hollow frame members is provided. The generally hollow frame members are secured to central portions of core members. The core members are positioned in juxtaposition with respect to one another so as to enclose a space therebetween with the core member extending generally outwardly from the enclosed space. The core members are secured to one another. An associated frame assembly is also provided.

Abstract: A flexible tie strut for supporting both compressive and tensile forces, the flexible tie strut including a tension member and a coaxially mounted compression member, the compression member and the tensile member being interconnected at their respective ends. A coupler for interconnecting struts, and a system of couplers and struts are also disclosed.

Abstract: On a side face of a corner bracket are formed a common insertion hole for a bolt, a stepped portion having a contact face and a contact edge which come to contact with a side wall of a strut and a side board of a shelf board, a strut projected portion engageable with an engaging hole defined in the side wall of the strut, and a board projected portion engageable with an engaging hole defined in the side board of the shelf board. The stepped portions are formed so as to extend entirely over a lower portion of the side face and to project outward. The side face of the corner bracket extends outside a line connecting between the strut projected portion and the board connecting portion formed thereon. Accordingly, the corner bracket is capable of reinforcing effectively a joint portion of the shelf board and the strut in a simple construction, and of preventing effectively an undesirable shaking of this joint portion.

Abstract: A collapsible table includes four stretchers connected at four sides by four four-way pipe joints and two stretcher connectors, four upright supporting frames respectively and vertically connected to the four-way pipe joints at the bottom, a table cloth having four sleeves at four sides respectively mounted around the four stretchers, and a bracing device having four bracing bars radially suspended below the table cloth and respectively connected to either upright supporting frame by a respective clamping plate, and four anchoring devices respectively mounted on the upright supporting frames for fastening to the ground.

Abstract: A rigid intersection connection including three intersecting elongated wood structural members and a rigid connector made from a single sheet metal blank which requires no welding. The rigid connector includes a pair of angular members joined in angular relationship and joined at a common outer edge. The rigid connector more specifically includes structure for engaging two sides of one of the elongated wood structural members and three sides of two of the elongated wood structural members. The disclosure includes a log holder, a table, a bunk bed, and a greenhouse or garden structure as examples of structures which can be readily constructed from the rigid intersection connections.

Abstract: A lattice is disclosed which is made of a multiplicity of rods that are connected to one another by a series of joints. Each rod has a connecting member which serves to connect with the joint. The connecting member may be designed as a fork, the axis of which extends vertically to that of the rod. The lattice may be locked together by either a cam or by a spring clip. The resulting hollow body may be either a two- or three-dimensional object.

Abstract: The recreational equipment junction box of the invention comprises a quarter cylindrical hollow box which may be modified and configured in various ways to adapt to the designed application. Primary modifications include number and location of connected tubes, windows and ventilator panels. A further modified use for the junction box is as a control center, simulating the appearance of a vehicle cockpit.

Abstract: A hip corner plate connection in which a single element sheet metal hip corner plate connector is used to connect a hip rafter most commonly occurring in wood frame buildings having a stick-framed roof of either dimensional lumber or plywood I-rafters to the top plates of the supporting walls. The sheet metal hip corner plate connector includes base members which attach to the single or double top plates of the framed wall, and flanges which attach to the hip rafter.

Abstract: A hip ridge connection in a building structure in which two hip rafters are connected to a ridge member by a sheet metal hip ridge connector having a base which is in registration with the end face of the ridge member and has flanges fastened to the side faces of the ridge member, and two seat members holding the two hip members in selectable sloping relation to the ridge member. The same sheet metal hip ridge connector may also be used to connect two hip rafters to a wall or the face of two common rafters. Modified forms of the sheet metal hip ridge connector may be used to connect 2x or 4x dimensional lumber hip rafters to 2x or 4x dimensional ridge members. One sheet metal hip ridge connector is slope adjustable in the field up to a 12/12 pitch for the hip rafters.

Abstract: A bracket assembly for use in constructing a saw horse has a main bracket and an auxiliary bracket cooperatively engaged to readily form a rigid saw horse for use or readily permit the folding or break-apart of the saw horse for moving or storing. The main bracket has a generally inverted Y-shape with a vertical open-top channel to receive the auxiliary bracket and two inclined open-bottom channels to receive leg members of the saw horse. The auxiliary bracket has a H-shape with a vertical open-bottom channel to engage the vertical open-top channel of the main bracket and a vertical open-top channel to receive a cross-piece member of the saw horse. Attachment means allow a rigid though semi-permanent connection with the leg members and the cross-piece member and a rigid though removable connection between the main and auxiliary brackets.

Abstract: A rigid intersection connection including three intersecting elongated wood structural members and a rigid connector made from a single sheet metal blank which requires no welding. The rigid connector includes a pair of angular members joined in angular relationship and joined at a common outer edge. The rigid connector more specifically includes structure for engaging two sides of one of the elongated wood structural members and three sides of two of the elongated wood structural members. The disclosure includes a log holder, a table, a bunk bed, and a greenhouse or garden structure as examples of structures which can be readily constructed from the rigid intersection connections.

Abstract: An improved joint mechanism for an umbrella which has a first connecting device which includes a shaft member which has a channel through its length and is capable of sleeving onto a rib member and a saddle portion with a U-shaped configuration disposed at the middle portion of the shaft member. A second connecting device defines a connecting tube suitable for fixing a tip portion of a stretcher and a yoke portion having a supporting beam which can be rotatably received by the saddle portion of the first connecting device.

Abstract: There is provided an improved separable joint for arm and hub constructions for structural frameworks. The separable joint comprises a hub having sides and opposite ends. A plurality of spaced, longitudinal, parallel apertures extend end to end through the hub positioned towards the sides of the hub. Parallel, longitudinally extending slots extend between the sides of the hub and central portions of the apertures. An elongated spline is provided having ends and sides. A keyway slot extends from end to end through the spline and opening to one side. The sides of the spline are contoured to conform to the sides of the corresponding apertures in the hub and to be releasable received therein with the keyway slot opening and the hub aperture slot aligned adjacent to each other. The spline has secured in its keyway slot a co-operative interlocking key formed in an end of a corresponding arm.

Abstract: A rigid intersection connection including three intersecting elongated wood structural members and a rigid connector made from a single sheet metal blank which requires no welding. The rigid connector includes a pair of angular members joined in angular relationship and joined at a common outer edge. The rigid connector more specifically includes structure for engaging two sides of one of the elongated wood structural members and three sides of two of the elongated wood structural members. The disclosure includes a log holder, a table, a bunk bed, and a greenhouse or garden structure as examples of structures which can be readily constructed from the rigid intersection connections.