Abstract: A folding square framework which may serve as a support for a tensile canvas or membrane. This framework, which may be mounted on a fixed column or wall, may fold, around hinges set at 54.3° to the longitudinal axes of each member of the framework, at each corner, compactly together such that all four sides of the framework are rested parallel with one another, perpendicular to the plane of the unfolded structure.

Abstract: A tower and a method of constructing a tower. The tower has three first support members which are made up of sections. Each section has an outside leg and two inside legs, laced together in a triangular cross section. The upper end of each inside leg is attached to the upper end of one of the other inside legs. Sections are joined together to form support members. Second support members are joined on top of the first support members. The desired height of the tower is achieved by adding other support members on top of the second support members. The last member to be placed on top is the upper member. An upper member, having three legs, laced together to form a triangular cross section, is erected on top of the support members, so that the legs of the upper member extend upward from the outside legs of the support members.

Abstract: A method and lightweight apparatus (100) that provide linear actuation effected by the controlled inflation of a deployable tube (120) permits the deploying end (125) of the tube (120) to be guided out in a linear motion by a yoke (140) that constrains the inflated portion of the tube (120) immediately behind it A means for imparting resistance to deployment facilitates a smooth actuation by controlling both the rate and the directionality of deployment, and by maintaining a uniform internal pressure in the tube being deployed. A frame assembly (180) at the deploying end (125) of the tube (120) can be configured to interface with a variety of components to be linearly deployed.

Abstract: A truss assembly includes angled cross members and straight cross members which extend between two parallel truss members. Brackets are provided along the two parallel truss members for attachment to the ends of the angled and straight truss members. Slots are provided either in the brackets or in the angled truss members to permit pivotal movement of the angled truss members to accommodate varying dimensions of the truss assembly.

Abstract: An apparatus and method is disclosed for providing a collapsible support structure strut, which may include a strut member; a hollow tubular terminal end portion of the strut member having an inner surface; and a detachable looped eyelet having at least one loop and a pair of extending legs, the legs being springedly biased to engage the tubular terminal end of the strut, thereby frictionally holding the looped eyelet in place at the terminal end of the strut. The apparatus and method may also employ a holding plug, with first and second holding groove opposingly placed in the periphery of the holding plug, having at least a portion thereof that is shaped and sized to frictionally engage the inner surface of the tubular terminal end of the strut, to frictionally hold the holding plug in engagement with the strut. The detachable looped eyelet may also have at least two loops.

Abstract: The present invention provides a transformable linked structure, a deployable diagonal structure, a plane stowage-type deployable truss and a line stowage-type deployable truss with high rigidity and reliability constituted by the above-described transformable linked structure and the above-described deployable diagonal structure, and also provides a plane/line stowage truss structure extremely approximated to a spherical surface using the two types of deployable trusses. The present invention discloses a module linked structure for linking deployable trusses securely and a holding/releasing mechanism for realizing reliable holding and release. Further, the present invention provides a modular deployable antenna with high precision even if it is large-sized which is realized by spreading mesh on the plane/line stowage truss structure.

Abstract: A strut apparatus for constructive use in the building framing arts is comprised of an elongate sheet-metal first cylinder, open at each of its ends, one of the ends providing a pair of integral ears. An elongate sheet-metal second cylinder is also open at each of its ends, and also provides attachment ears. The first and second cylinders are adapted by size and shape for tight sliding mutual engagement in a coaxial, linearly extensible, relationship with the ears of each of the cylinders extending in opposite directions.

Abstract: An elongated truss boom structure is adapted to be flattened and coiled to a stowed configuration. The truss boom includes longerons, battens, and diagonals A fixed ladder shaped structure is formed by a plurality of fixedly coupled battens which interconnect two adjacent longerons. The truss boom is flattened for stowage by arranging all of the longerons coplanar to the plane of the fixed ladder shaped structure. The longerons preferably have a corrugated cross section. For stowage the longeron is heated and compressed into a ribbon shaped cross section, and upon deployment the longeron is heated to restore its corrugated cross section. A mechanical assembly machine includes a drum, a stowed flattened truss boom rolled into a coil around the drum, a device for unrolling the coil, an actuating and locking mechanism, and a control arm which connects the actuating and locking mechanism to the drum.

Abstract: For a truss, a hinge assembly for connecting truss members that form the truss. The hinge assembly may include a first hinge plate having a first boss formed thereon and a second hinge plate having a second boss formed thereon. The second boss defines an opening for pivotal receipt of the first boss. The hinge assembly also includes a retainer for maintaining the pivotal receipt of the first boss in the second boss. When the first hinge plate is attached to a first portion of a truss and the second hinge plate is attached to a second portion of a truss, the first and second truss portion can be pivoted relative to each other to enable portions of the truss to be collapsed for transporting purposes.

Abstract: A frame expandable in a structural opening has a stretchable substantially fluid impermeable cover membrane disposed across the frame and arranged to stretch with expansion of the frame. The frame is preferably expandable in mutually perpendicular directions, and provided with peripheral seals for sealing in the structural arrangement. The barrier is conveniently fitted in openings such as doors and the like to provide a temporary barrier to rising floodwaters and the like.

Abstract: A new hub element is disclosed for building reversible expandable three-dimensional truss structures. The hub element can directly connect a pin joint towards the center of a scissor linkage to a pivot located near the extremity of another out-of-plane scissor linkage. It has the advantages of being more compact than previously known hub elements and can be used to create foldable structures that are more structurally sound than previously possible. The use of this novel hub element can also reduce the number of pieces required for a given foldable structure, thereby reducing manufacturing and assembly costs.

Abstract: A connector is disclosed for interconnection of disconnected truss members. The connector comprises an elongate sheet metal plate including a first plate portion and a second plate portion. The first plate portion has nailing teeth adapted to be driven into a truss member for permanently attaching the first plate portion to one member. The second plate portion has nail holes formed in it for receiving nails to permanently attach the second plate portion to another of the truss members. The second truss plate portion is substantially free of nailing teeth at the peripheries of the nail holes, but has at least one nailing tooth for temporary connection of the second plate portion to the truss during transport. The truss can be collapsed and transported to the building site with the truss members disconnected.

Abstract: A hub assembly for pivotally connecting the ends of support rods of a portable self-supporting display structure configured for a collapsed storage position and an expanded display position. The hub assembly may include first and second members and a connector. The first and second members are mated to provide bearing surfaces and to accommodate pivot pins affixed to the support rods. The connector secures the mated first and second members together by being extended through bores in the mated first and second members.

Abstract: A universal building unit comprising a plurality of members connected to each other by at least one adjustable plate. There is also at least one panel connected to the plurality of members. In this case, the plurality of members, the adjustable plate, and the panels all connect together to form a universal building unit that can be repeatedly constructed and combined with adjacent building units to form a building structure. These building units also contain a heating and cooling system for heating and cooling each unit within the structure. In addition, these units can be combined in any manner to create stairs, walls, doors, fixed and movable partitions, windows, roofs, or any other type of building component. These building units comprise a series of simple, easy to install fittings and steel profiles to create framing for any type of building.

Abstract: A banner stand for displaying an advertising sign, the banner stand being adjustable to multiple shapes and sizes. A four-sided, rectangular stand frame has at least two telescoping members so as to provide the stand with various sizes. A swivel connector is positioned at an end of each telescoping member so as to compensate for any misalignment produced by the telescoping feature of the members.

Abstract: A series of static structures formed from a plurality of interconnected rigid compression members or struts and flexible tension members or guys (e.g. wire cables, chains or elastic cords). Each strut is in pure compression (i.e. no bending or twisting forces) and each guy is in pure tension. The struts are discontinuous in several embodiments of the invention, intersect at an internal or peripheral point in others, or radiate outwardly from an internal central point in still others. Three or four configurations of guy arrangements are described and claimed for each of the five embodiments of this invention. Self-Guyed Structures (SGS's) can be utilized as a stand-alone module or modules can be combined by connecting them at any point on a strut or guy in a nested (overlapping) or an adjacently attached configuration to assemble composite SGS's.

Abstract: A collapsible three sided truss, in which a rectangular central framework section has outboard framework sections each hinged to one side, which can be swung together to bring interfitting portions together, with locking mechanisms manually operable to connect these portions together and form a rigid three sided truss. When released and swung out, the outboard sections form a flattened array with the central section for easy transport and handling. Slidable pins are included in the locking mechanisms, engaging aligned holes in partial sleeves on cross members of one outboard section fit to elongated member of the other outboard section. The three sided trusses can be connected end-to-end with couplings and locking pins.

Abstract: According to existing methods of frame building construction, a concrete foundation is formed on which wooden floor joists are laid. Walls are constructed on the foundation and floor using wooden wall studs, and a roof is constructed on the walls using wooden rafters, beams and trusses. These methods require skilled carpenters and high quality wood materials, both of which are increasingly expensive. There is therefore a need for a system for framing houses or other buildings which uses prefabricated steel framing and which is quick and easy to construct. The invention provides a prefabricated system for framing a complete building on a foundation. Folding telescopic framing units are used for vertical partitions and horizontal floor panels.

Abstract: A wall plate for attaching a horizontal or sloping beam to a vertical or nearly vertical masonry wall is disclosed. The wall plate comprises a flat plate having a multiplicity of nail holes and at least two bolt holes therethrough, at least one anchor extending from a first side of the flat plate and fixed to it, and means for threadedly attaching at least two bolts to the flat plate from its other side. A method of attaching a horizontal or sloping beam to a vertical or nearly vertical masonry wall using the wall plate is also disclosed. A vertical nailable form is erected and the wall plate is nailed to the inside of the form. Concrete is poured into the form to a height above the anchors of the wall plate. After the concrete has hardened, the forms are removed. Two angle connectors are bolted to the wall plate and a horizontal or sloping beam is bolted to the two angle connectors.

Abstract: A method and apparatus for converting a post-style poultry house to a clear span style poultry house. The apparatus includes a truss assembly including a center truss section adapted to be mounted to the roof beams and first and second outer truss sections adapted to be secured to the center truss section. The trusses are installed without the removal of the roof and without removal of the drinker and feeder equipment of the existing post-style poultry house. In installing the trusses, first the center sections of the trusses are attached to the roof beams and then the upper ends of the outer sections are attached to the center sections. Then the lower ends of the outer sections of the trusses are secured to the poultry house footers. Once the truss sections are all secured to each other and secured to the footers, the posts are cut away and removed.

Abstract: A partition includes at least two vertical posts with upper and lower beams having opposite ends thereof interconnecting the vertical posts to define when in an assembled condition, a rigid panel frame having a substantially open interior. The panel frame defines a vertical dimension. At least one cover panel is configured to enclose at least a portion of the open interior of the panel frame, and is removably mounted on the panel frame to readily access the open interior thereof. The cover panel defines an interior surface and a center portion spaced-apart from the posts. A cover panel brace is connected with the upper beam, and has an outer surface abutting the interior surface of the cover panel to support the cover panel adjacent the center portion to prevent flexing of the cover panel. The cover panel brace is longitudinally extensible to accommodate variations of the vertical dimension between the upper and lower beams.

Abstract: A channel bar assembly is provided for use with a modular display system. The modular display system can have a display frame that is made up of a plurality of legs that are coupled to a plurality of hubs. The channel bar assembly includes a first channel bar and a second channel bar, each channel bar having a first end and a second end, and a hub connector having a first end hingedly coupled to the second end of the first channel bar, and a second end hingedly coupled to the first end of the second channel bar. The hub connector is connected to one of the plurality of hubs.

Abstract: A portable, easily composable supporting skeleton which serves as a supporting structure of buildings composable in situ. The skeleton comprises a pipe-like spacer. Two dismountable node plates can be fixed to the spacer by way of clamping assemblies. Each node plate includes an eye having a through-hole. A joint assembly which comprises a crosswise tie-piece can be interconnected pivotably to the through-hole of the eye of one of the node plates.

Abstract: A method and apparatus for converting a post-style poultry house to a clear span style poultry house. The apparatus includes a truss assembly including a center truss section adapted to be mounted to the roof beams and first and second outer truss sections adapted to be secured to the center truss section. The out truss sections each comprise substantially upright portions and an inclined portion extending therefrom. The trusses are installed without the removal of the roof or beams of the existing post-style poultry house. In installing the trusses, first the center sections of the trusses are attached to the roof beams and then the upper ends of the outer sections are attached to the center sections. Then the lower ends of the outer sections of the trusses are secured to the poultry house footers. Once the truss sections are all secured to each other and secured to the footers, the posts are cut away and removed.

Abstract: A connector for readily fabricating trusses or scaffolding for use in temporary, demountable construction which cooperate with elongated support members to fabricate modular box trusses.

Abstract: A collapsible structure comprises a base member (B), a lower unit (10) comprising a first side structure (11) having a base end hinged to the base member (B) and a second side structure (16), an upper unit (20) comprising a first side structure (21) having one end hinged to an extremity of the second side structure (16) of the lower unit (10), and a second side structure (27) having one end hinged to the first side structure (16) of the lower unit (10) and the other end hinged to the first side structure (21) of the upper unit (20). The first and the second side structure (11, 16) of the lower unit (10) are laid down, the second side structure (27) of the upper unit (20) is laid down on the first side structure (11) of the lower unit (10), and the first side structure (21) of the upper unit (20) is laid down on the second side structure (16) of the lower unit (10) in a folded state for storing.

Abstract: A constructive system applied to buildings in general, to form walls, by means of modular foldable frames attached, who allow to place from the upper part blocks or plates and support it.The blocks have horizontal or vertical holes, to pass brazing rods, linkes with the frames.The blocks when overlapped form channels, to pass rods linkes with the frameThe frames when are formed by two vertical jambs and two horizontal articuladed piedes. When joined together with other adjacent, form filling channels, to fill with resistant materials, and other channels to fill with materials to seal joints of blocks or plates.The frames with the resistant channels, rods, blocks or plates, resist better strong winds and seismic movements.

Abstract: The reinforcing brace frame is utilized in building walls as a complete system of protection against both the severe shear stress and uplifting encountered during tornados, hurricanes and earthquakes. The reinforcing brace frame includes two vertically-spaced horizontally extending frame members joined at their opposite ends to two horizontally-spaced vertically extending frame members, and a diagonal member rigidly connected to opposite ends of the horizontally extending frame members. The reinforcing brace frame can also include spaced vertical support members between the vertical frame members. The reinforcing brace frame is directly attached to a concrete foundation by shear bolts and hold down bolts. Consequently, the reinforcing brace frame provides increased resistance against simultaneous shear stress and uplifting, eliminating the need for plywood shear panels.

Abstract: The invention is an assembly for providing insulation. An assembly which provides ventilation in accordance with the invention includes a planar element; insulation positioned proximate to the planar element; and at least one space element, each space element being positioned between the planar element and the insulation, the space element including two parallel straight plate members and at least one distance member which interconnects the two parallel straight plate members which respectively face the planar element and the insulation, each distance member including two spaced apart bendable sections attached to zones of attachment to the plate members and a displacement part connected to the bendable sections and defining an angle (.alpha.) with one plate member with the angle (.alpha.

Abstract: A window display frame having a top panel, a bottom panel and two side panels. Each panel has an inner surface defining a channel for placement of the replacement window, an outer surface, and two ends. Each side panel has a longitudinal groove extending from each end along the center of the outer surface to an end point, and a bore located adjacent each end point. The bore preferably has a depth that is greater than the depth of the groove. There are four L-shaped corner brackets mounted one on each end of the top and bottom panels. Each corner bracket comprises two legs, an inner surface, an outer surface and inwardly flanged edges. Each end of the top and bottom panels is attached to and fits snugly into the inner surface of one leg of a corner bracket between the flanged edges. The free leg of each corner bracket can then be used for attachment to a side panel to complete the frame. The free leg of each corner panel has a protrusion located on the inner surface.

Abstract: A system for framing houses or other buildings which uses pre fabricated steel framing and which is quick and easy to construct. A prefabricated system is provided for framing complete building, on a foundation. Folding telescopic framing units are used for vertical partitions and horizontal floor panels. A prefabricated system of framing units is provided for constructing a building comprising: a) providing a foundation; b) securing vertical beams having open upper ends to the foundation at spaced locations; c) securing horizontal beams between the upper ends of the vertical beams; d) erecting and securing folding, telescopic floor joists on the foundation; and e) erecting and securing folding, telescopic roof trusts at spaced locations on the horizontal beams.

Abstract: A construction system for building a steel frame using steel members. Rafters form a roof portion of the steel frame, and a ceiling joist having two ends forms a ceiling portion of the steel frame. Compression webs and tension webs, disposed between the rafters and the ceiling joists, distribute the load between the rafters and the ceiling joists. The tension webs are disposed between the rafters, the ceiling joists, and the compression webs, and inhibit distortion of the roof. A peak bracket connects two rafters and a compression web together. Eave brackets connect the two unconnected ends of the two connected rafters to the ends of the ceiling joist, such that each end of the ceiling joist aligns with one of the unconnected ends of the two connected rafters. Compression brackets connect the compression webs to the ceiling joist. A center bracket connects two of the tension webs and one of the compression webs to the ceiling joist.

Abstract: A connector plate for joining, in a biased manner, structural members of a building and including first and second plates in overlapped relationship with each plate adapted for individual securement to a structural member being joined. A tapered insert serves to impart tension to at least one of the plates so as to draw the attached structural member toward the remaining member. Supplemental tensioning members engage misaligned openings in the plates to further tension one of the plates.

Abstract: This invention relates to apparatus used in supporting safety rails and discloses a system in which a safety rail post support and security device is used in pairs or greater multiples to hold pieces of a safety rail at the edge of an elevated surface and is speedily attached to or detached from the three commonly found roof edge structures, that is, roofs that are flat right up to the edge, roofs that have a very low ledge or flashing around the perimeter, and roofs that have a parapet along the edge. Previous systems rely on cantilever weights positioned well in from the edge of the roof, interfering with the work to be done there. The post support and security device has a junction piece comprising four intersecting extruded stabilizer bars perpendicular to each other in one plane and a fifth bar protruding from that plane at ninety degrees. An upright post fits into one of the bars after the junction piece is bolted to a roof or to a wall abutting the edge of a roof, or is clamped to a parapet.

Abstract: A quick assembling coupling system for bar structures consists of an annular disk containing a number of radial sleeves having their longitudinal axes distributed about the annular disk such that the ends of the bars are held in the sleeves by a prismatic lock cover inserted in the center of the annular disk.

Abstract: An adjustable foundation wall arrangement having first and second foundation walls running generally parallel to each other and a third foundation wall being disposed between the first and second foundation walls. The first and second foundation walls are preferably prefabricated and the third foundation wall is prefabricated in two portions. On site, one of the third foundation wall portions is aligned to the first foundation wall and the other of the third foundation wall portions is aligned to the second foundation wall. This alignment typically leaves a small space between the inner ends of the third foundation wall portions. This small space, preformed in the shape of a receptor for a key stud, is at least partially filled by the key stud to tie the third foundation wall portions to each other. Alternatively, or preferably in combination with the key stud, a cap tie connects the third foundation wall portions to each other.

Abstract: There is disclosed an assembly of board for floor boarding and means for fixing the same to adjacent boards, said board comprising a frame, of generally rectangular shape, suitable for accommodating therein a flooring surface, such frame comprising a first pair of opposite beams and a second pair of opposite beams connecting the first pair of beams. The beams of said first pair are provided, at least at their ends, with recesses suitable for housing clamps for coupling the board with adjacent boards. The recesses are associated to releasable snap engagement means that engage in respective seats provided for on the clamps to prevent the clamps from slipping out of said recesses.

Abstract: A truss pitch break connector plate having a main body portion. A first stiffener flange projects generally perpendicular from one face of said main body portion along an arcuate first edge having an outer radius. A second stiffener flange projects generally perpendicular from the opposite face of the main body portion along a arcuate second edge having inner radius. The main body portion preferably is generally sector-shaped but alternatively it may be circular. The overall arrangement is such that the pitch break connector plate will accommodate top chords of different sizes; and is capable of maintaining the top chords at any one of a range of roof pitches.

Abstract: A modular truss system that is formed by connecting a plurality of linear and non-linear truss modules together. The truss system further including a tensional member that is adapted to create and maintain a biasing force that urges the individual truss modules against one another, which forms a more rigid system that has increased structural strength.

Abstract: A portable banister, for use by a person in climbing or descending a staircase having a plurality of steps which are separated by risers, comprising a foot portion, a handgrip portion, and mast members extending between the foot portion and handgrip portion. The foot portion is stepped to match the contours of the staircase. In particular, the foot portion includes a pair of horizontal slabs which rest against sequential steps, and a vertical member which extends between the horizontal slabs and rests against the riser therebetween. The horizontal slabs extend parallel to each other. The distance between the horizontal slabs is adjustable to match the staircase. The mast members each extend between one of the horizontal slabs and the handgrip portion, and are each adjustable in length to vary the height and angle of the handgrip portion for the comfort and safety of the user.

Abstract: Truss elements of a structure that are prefabricated, but hinged so that trusses may be reduced in size for transportation and storage. The hinge is made up of a sheet of flexible material which is affixed to elements of the truss by press fit plates. This press fit hinge can be installed on the truss simultaneously with the other press fit plates used to construct the truss, thereby dramatically reducing the number of steps required to construct the truss while still providing the desired feature of the hinge.

Abstract: A flood or storm resistant barrier for a doorway or window opening. The barrier formed of a frame having two parts with one part in telescopic engagement with the other frame part. A manually operable jack in the form of four links pivotally connected to form a parallelogram linkage is inserted between the two frame parts. The jack being operable to move the frame parts relative to one another so as to vary the external dimension of the frame and thereby enable the frame to be secured in a doorway or window opening by expansion of the frame into engagement with opposed surfaces of the doorway or window opening. A waterproof barrier member is carried by the frame for blocking at least a portion of the doorway or window opening.

Abstract: An expandable self-locking frame useful in the construction of temporary to permanent walls. The frame comprises a plurality of longitudinally extensible studs mounted along the length of a pair of elongated tracks. Each of the longitudinally extensible studs is provided with a longitudinal extension mechanism incorporating a locking mechanism with which a length of the frame can be adjusted. In a preferred embodiment, the outer longitudinally extensible struts of the frame are further provided with lateral extension mechanisms with which the width of the frame can be adjusted.

Abstract: A truss for use as support for a sloped roof of a building. The truss can be a collapsible metal truss. A method for assembling the truss is described. Each of the of the rafter and beam can include a metal chord all which chords lie in a first plane. Each of struts can include a metal chord located in a second plane parallel to the first plane. There are pivotal connections between various members. The chords of the truss can be moved into a collapsed position for storage and transport of the truss. The chords can be hollow tubes of generally rectangular cross section. The pivotal connections can be nut and bolt connections. The rafter and beam chords can be connected at an eave end to each other by a metal member, and the truss can include an eave extension member.

Abstract: A pitch break connector is provided. The pitch break connector has an outside and inside rigid member. Each member has a first generally U-shaped channel defined by a spine member between first and second legs. Each member has a first and a second pivot end portion. A hinge pivotally connects the inside and outside members through the pivot end portions in a generally longitudinally opposing position. In this configuration, the first and second end portions of the inside member can be pivotally accepted into a cavity defined by the generally U-shaped channel of the outside member when the members are pivoted about the hinge.

Abstract: The invention comprises a folding pyramidal structure in which one or several people can be introduced, being designed to bear extreme loads derived from collapsing of the building provoked by large intensity seismic waves. The particular configuration of the structure allows it to break or deviate structural elements, such as planks, beams and armatures of the collapsing building, falling on it and creating niches, thus allowing its occupants to exit from the enclosure or remaining alive under the rubble, being rescued opportunely. In case of failure of the building during a large intensity earthquake, the niches formed with the help of this structure may avoid death of its occupants.

Abstract: A modular truss system that is formed by connecting a plurality of linear and non-linear truss modules together. The truss system further including a tensional member that is adapted to create and maintain a biasing force that urges the individual truss modules against one another, which forms a more rigid system that has increased structural strength.

Abstract: A foldable truss comprising three truss cords and webbing connecting two of the three truss cords. The one central truss cord includes hinge segments which allow the truss to occupy a closed position, in which the truss is folded for transport, and an open position, in which the truss is expanded into a stable triangular configuration for supporting objects and/or providing a frame. The present invention may further include various configurations of a bracket for securing the truss in the rigid and stable open position.

Abstract: The present invention is a collapsible roof truss comprising two elongated wooden structural members consisting of upper and lower chords, the lower chord having a bevel end, the angle of which corresponds to the roof pitch. The hinging mechanism comprises two identical metal disks, each having a rigid annulus at its respective periphery and with an opening in the center therethrough to pivotally connect the disks. Each chord has grooves formed on both sides, the depth of the grooves being equal to the height of the annuli, the grooves on the upper chord being in the form of a semi-circle, the grooves on the lower chord being in the form of an arc corresponding to the angle formed by the bevel, and each chord having a notch therethrough at the center of the radii of the semi-circle and the arc respectively for receiving a fastener therethrough. The grooves, when chords are in assembled relation, form a nearly complete circle.

Abstract: A telescoping wall mount includes two long structural bars (1) and (6) having specific lengths and that are coupled together telescopically. The first bar (1) has a cross section similar to an open rectangle with wings (4) on the open side, each wing terminating with a U-shaped inwardly bent edge (5). The second structural bar (6) is made to be housed and to run inside the first bar. The second bar (6) has a cross section similar to an open rectangle with the wings (7) housed inside the U-shaped edges (5) of the first structural bar and sized so as to avoid transversal slack.