Abstract: A mounting system and method for security screens for use with windows having an exterior-facing accessory groove at the outer perimeter of the window frame is disclosed. The mounting system and method according to the present invention reduces materials cost for manufacture of security screens while improving aesthetics of the installation and permitting installation of security screens either at the construction site or during window manufacture, while preserving the window manufacturer's warranty. Exemplary embodiments both with and without a subframe are described.

Abstract: An intruder resistant screen providing improved strength. The improved intruder resistant screen comprises a frame, a woven wire intruder resistant mesh covering an opening enclosed by the frame, a plurality of clamp elements engaging with frame members to hold the mesh by a leveraged clamping action and at least one fastener holding each clamping member to the frame member. Each fastener has a drilling portion, a shank portion, a head and a thread. The frame comprises multiple frame members joined by corner stakes and there are two or more clamp elements engaging each frame member.

Abstract: Provided is a canvas frame including a first frame which is made of a metal material and connected, formed in a rectangular frame shape, and provided so that a part of a front surface is in contact with a canvas, and has a body part in which the inside is hollowed and inner and outer fastening parts connected to inner and outer surfaces of the body part, respectively; and a second frame which is made of a foam synthetic resin and has an insertion groove formed on the upper portion so that the body part is inserted, a support part formed so that an edge of the canvas is fixed and supported to the lower portion thereof by a fixing member, and inner and outer insertion parts which are formed on inner and outer surfaces of the support part, respectively, to be inserted and fastened to the inner and outer fastening parts.

Abstract: A truck cover system including a rail, a clamp structure, a latch structure, and a weather seal. The rail defines a cover slot for a cover that extends over a truck bed. The clamp structure is configured to couple to a truck wall of the truck. The clamp structure includes a clamp fastener configured to tighten the clamp structure against the truck wall. The clamp structure also includes a connecting member extending in the vertical direction when the truck cover system is employed and the clamp structure is coupled to the truck wall. The latch structure is configured to couple to the rail and to the clamp structure. The latch structure includes a rail interface configured to couple to the rail and a latch body including a plurality of laterally-offset locking positions. The connecting member is configured to lock to one of the plurality of laterally-offset locking positions.

Abstract: Some embodiments are directed to a protective frame assembly. The frame assembly includes a first frame including an inner wall surface and an outer wall surface opposite to the inner wall surface. The inner wall surface includes a channel. The frame assembly also includes a second frame including a front wall surface and a rear wall surface. The rear wall surface of the second frame faces the inner wall surface of the first frame. The frame assembly further includes a spline received within the channel of the first frame. The frame assembly also includes a mesh sandwiched between the inner wall surface and the rear wall surface. The spline engages with the mesh within the channel to retain the mesh in a tensioned state.

Abstract: A hidden fastener screen installation system includes a plurality of screen frame extrusions cooperating to form an opening across which a screen is positioned. Each screen frame extrusion includes a mounting surface and a singular mounting rib extending outwardly from the mounting surface. The mounting surface is configured to receive a plurality of mechanical fasteners to retain the screen frame extrusion to a portion of a building structure. A trim mold includes a channel configured to closely receive and retain the mounting rib. The screen is received in the channel and is retained by cooperation between the trim mold and the mounting rib. A portion of the trim mold extends over the fasteners and fully covers the fasteners such that the fasteners are completely hidden upon installation of the trim mold on the screen frame.

Abstract: A corner reinforcement gusset with a radial or other shaped cutout at an internal corner of the gusset. The cutout can alleviate the stresses at that corner and reduce failure. The gusset can therefore better reinforce an enclosure or other object to maintain the structural stability of the object better than prior art gussets.

Abstract: A frame assembly with strengthened corners is described. The frame assembly includes internal corner sets that squeeze or pull mitered or angled edges of frame sections together. The corner sets fit into openings at corners between adjacent frame sections. The frame assembly includes corner braces that snap lock over a corner between adjacent frame sections. The corner braces fit over exterior surfaces of the frame sections forming the frame assembly. The corner brace snaps into grooves in the exterior surfaces of the frame sections. The frame assembly includes a corner member that engages to an outer flange of joining frame sections. The corner member spans the corner between the joining frame sections.

Abstract: An apparatus to connect two mass timber (CLT, LVL, or other configurations) shear wall panels, comprising a high load deformation capacity steel connector, wherein the connector comprises a high stiffness that shifts to a low stiffness during a high intensity earthquake or significant wind loading event.

Abstract: A single piece roll-formed frame comprising a first channel having a base section and one or more legs, each leg comprising an upper side extending from the base section at a first angle and a lower side extending from the upper side at a second angle, a second channel having a base section and one or more legs, each leg comprising an upper side extending from the base section at the first angle and a lower side extending from the upper side at the second angle and wherein the base section of the first channel and the base section of the second channel are formed from a single piece and intersect to form a third angle, and the upper side of each leg of the first channel overlaps the upper side of each leg of the second channel.

Abstract: An apparatus to connect two mass timber (CLT, LVL, or other configurations) shear wall panels, comprising a high load deformation capacity steel connector, wherein the connector comprises a high stiffness that shifts to a low stiffness during a high intensity earthquake or significant wind loading event.

Abstract: A refrigerator includes a refrigerated compartment and a door configured to selectively seal the refrigerated compartment. A drawer assembly is mounted in the refrigerated compartment. The drawer assembly includes a glide and a drawer. The glide has a glide rail movable relative to the refrigerated compartment and a glide endcap directly coupled to the glide rail. The drawer has a front wall, a rear wall, a bottom wall, opposing side walls and a retaining clip. The retaining clip is directly coupled to the glide endcap. The retaining clip and the glide endcap prevent the drawer from moving vertically relative to the glide rail.

Abstract: A device for mounting a rear wall on a movable furniture component of a piece of furniture, in particular on a drawer, with the movable furniture component including a rear wall and a drawer sidewall unit. The device is characterized in that the device is for arrangement between a rear wall holder extending on the drawer sidewall unit in a plane of the rear wall and the rear wall, and the device has an engagement mechanism for engagement in the rear wall holder.

Abstract: A support assembly for providing a high degree of lateral strength and integrity is presented herein. The support assembly includes a beam support bracket having at least one laterally disposed elongated portion that is slidingly engaged with a corresponding lateral beam. The elongated portion of the beam support bracket is defined by spaced apart first and second support plates each including oppositely disposed edges which will mate with corresponding ledges, protrusion or reinforced corners within the lateral beam.

Abstract: A filter system includes a designated filter element including a geometric projection thereon and a filter element housing including an opening keyed to the geometric projection. The opening comprises a recess, a channel or a slot and the recess, the channel, or the slot includes a rib. The geometric projection engages the opening when the designated filter element is installed in the filter element housing, and the filter element housing includes a filter housing body and a filter housing cover.

Abstract: A pressure fit mesh gate having an outer casing and a mesh barrier door. The outer casing has a pair of upright frame elements connected to a lower cross element. The mesh barrier door is positioned within the outer casing. The mesh barrier door is hingedly connected to one of the upright frame elements. The barrier door has a frame including a first side member and a second side member friction fit connected at their ends by corner joints to an upper member and a lower member. At least one of the corner joints is a two-part corner joint. The two-part corner joint has a first extension that is friction fit into a first end of one of the members, and a second extension friction fit into an adjacent end of another one of the members.

Abstract: The present disclosure relates to an air handling system including a casing structure formed from a cohesive sheet of material. The air handling system also includes a first side wall of the casing structure including a first section of the cohesive sheet of material. The air handling system also includes a first support portion extending inwardly from the first side wall. The first support portion includes a folded portion of the first side wall. The air handling system also includes a second side wall disposed substantially opposite the first side wall. The second side wall includes a second section of the cohesive sheet of material. The air handling system further includes a second support portion extending inwardly from the second side wall. The second support portion includes a folded portion of the second side wall. The first and second support portions are configured to support a filter.

Abstract: A window assembly for partition walls. The window assembly includes a plurality of connector assemblies that are configured to be connected to a partition frame around an opening through the partition frame. Each connector assembly includes a base structure and at least one movable retainer that is biased towards an engaged position. The window assembly also includes a subframe including two pairs of elongated subframe members having opposite ends that are rigidly interconnected to define a generally rectangular central opening. The subframe further defines oppositely facing inner and outer side faces. The subframe includes a connecting portion protruding away from the inner side face and engaging the movable retainer to connect the subframe to the connector assemblies. The window assembly further includes at least one sheet of light-transmitting material secured to the subframe and extending across the central opening.

Abstract: A printing screen, comprising a sheet, at least sections of at least one pair of opposite edges of which are folded such as to define attachment elements, and a printing screen unit including at least one pair of interface members attachable to the attachment elements at the at least one pair of opposite edges of the sheet.

Abstract: A stretched artist canvas frame system is supported with a rigid foam back to either allow artists to apply pressure to a canvas without stretching it and causing sagging, or to allow artists to use the stretched artist canvas as an alternative for artists who paint on board. The frame system is a light weight alternative to painting on board, especially when the paintings become very large. The frame system provides the texture of canvas but the stiffness of a board by supporting the board with a lightweight rigid extruded foam. The frame system gives the artist the choice of painting on canvas or the feel of painting on board. The rigid foam back allows the artist to even create a smooth board finish if they choose through priming techniques. As the canvas gets larger, they do not get prohibitively heavier.

Abstract: An innovative, low-density, highly-insulating modular panel for use in many applications and industries. The panel consists of a frame that may be preformed or bent and may be made of rigid or flexible material, and a panel covering comprising at least one pocket of thin, low-density shade fabric that has the capability of sufficiently stretching to surround the frame when the pocket is pulled onto it. The pocket may be then secured, along any previously open end where the frame was inserted, by various fastening devices. The panel covering pocket may have additional features added, as described herein. The panel is durable and cost-effective, and has good solar-control and insulating qualities. It is also a windbreak panel, a noise-reduction panel, an impact protection panel, a water-resistant panel, a fall protection panel, and a pollution-control panel. Two or more panels can be joined to create a structure-protecting panel assembly or system.

Abstract: A stretching system to stretch a canvas or material on a frame without the use of stretching pliers and staples. Special purpose corner clamps are used to secure the stretcher bars into an initial open miter frame to orient the double sided adhesive strip on the side of the stretchers towards the canvas or material while maintaining the adhesive strip from touching the canvas or material. After alignment, the stretching bars are pressed down and attached onto the canvas or material and the corners are released. The corner clamps are removed and canvas or material corners are cut and folded into the open miter ends which also have adhesive strips. By rotating the stretchers axially 90 degrees into the final frame, thus closing the miters, and upon inserting U-shaped fasteners into the grooves placed on the back of the stretcher, the canvas or material is stretched and ready to display.

Abstract: A safety screen frame has four frames joined together to form a fall resistant window screen to prevent accidental falling. Each frame has an upper frame portion and a lower frame portion integrally formed out of aluminum. A hinge channel runs longitudinally along a top portion of the upper frame portion and allows the upper frame portion to rotate around an integrally formed pivot slot that is longitudinally disposed at the vertex between the upper and lower frame portions. A spline track holds weather strip materials and spring detents. A plurality of compression ridges are disposed along the inside facing surfaces of the upper and lower frame portions that hold a screen when the upper frame is rotated and compressed against the lower frame. The screen is made of a high strength material such as stainless steel. Each frame is mitered and welded together to form a window screen.

Abstract: A framing corner joint includes first and second framing rails of fiberglass-reinforced resin construction. The first and second framing rails have hollow mitered ends. A pair of thermoplastic plugs are received in the mitered ends of the respective framing rails. Each of the plugs includes a body inserted into the hollow interior of an associated framing rail and a flat plug flange at an angle of 45° to the body. The plug flanges extend outwardly from the peripheries of the bodies between the rail ends and have flat end faces that are bonded to each other. The bodies of the plugs preferably are hollow, and preferably are received by interference press-fit within the ends of the rails. The plug flanges of the plugs preferably are welded to each other.

Abstract: A printing screen unit including a printing screen having two pairs of opposite edges and a frame including interface members bonded to opposite edges of the printing screen and coupled together at corners of the frame, wherein the frame holds the printing screen in an untensioned state when no tension is applied thereto by external tensioning mechanisms separate to the frame, and the frame is substantially rigid when in the untensioned state, but allows for relative movement of the respective pairs of interface members by a tension applied by external tensioning mechanisms separate to the frame to tension the printing screen.

Abstract: A sliding screen frame is designed with sufficient strength to not bind, bend or sag, allowing the sliding screen frame to open and close easily every time. Stainless steel wire screening can protect against vandalism, weather conditions, pets, children and everyday use, while being impact resistant, increasing security, and protection against theft. Rollers on the top and bottom of the sliding screen frame can adjust and lock into place so that the screen insert frame cannot be easily removed by intruders. The rollers also allow the sliding screen frame to roll easily along the sill tracks.

Abstract: A canvas or material stretching system designed to allow a professional or amateur user to stretch a canvas or material on a frame without the use of stretching pliers and staples, both of which require considerable skill and strength. Special purpose corner clamps are temporarily used to secure the stretcher bars into an initial open miter frame. The purpose of this is to orient the double sided adhesive strip on the side of the stretchers towards the canvas or material while maintaining the adhesive strip from touching the canvas or material. Once alignment is achieved, the stretching bars are pressed down and attached onto the canvas or material and the corners are released. The corner clamps are removed and canvas or material corners are cut and folded into the open miter ends which also have adhesive strips.

Abstract: A photovoltaic module includes a photovoltaic module body and frames mounted to a periphery thereof. The frame includes a main body having a hollow structure and a fit-engagement portion located above the main body and fittingly receiving the periphery of the photovoltaic module body. The main body of the frame is formed with a mounting portion into which a press-insertion member is press-inserted and which has a great outside wall thickness and a small inside wall thickness in section. The frames are fixed to each other by press-inserting the press-insertion member into the mounting portions thereof.

Abstract: A sheet material tensioning apparatus includes frame members interconnected one with another to define a closed contour. The apparatus applies tension to sheet material by imposing a separation between frame members to expand the closed contour. Beneficially, the sheet material tensioning apparatus includes an edge-bridging mechanism, such as a spline, to span the gap between the separated frame members. The edge-bridging mechanism maintains the continuity of the edge supporting the sheet material. The sheet material apparatus may include a crossbar assembly to add rigidity to long frame members, while maintaining planar alignment even under considerable compression.

Abstract: Devices and methods for temporarily replacing a window are disclosed herein. An exemplary temporary window replacement apparatus includes a plurality of angled frame members, a plurality of elongated frame members, and a plastic film. Typically, at least one of the angled frame members can change angles within a given plane. Additionally, at least one of the elongated frame members typically can adjusted lengthwise along a longitudinal axis to connect with the ends of two angled frame members. The end of each angled frame member typically can be connected and removed from the end of each elongated frame member. Moreover, some of the frame members have attached stability flange to aid in securing the temporary window apparatus to an automobile window frame. Methods of temporarily replacing a window include constructing a temporary window frame with a heat-shrinkable plastic film and then applying heat thereto.

Abstract: A stretching system to stretch a canvas or material on a frame without the use of stretching pliers and staples. Special purpose corner clamps are used to secure the stretcher bars into an initial open miter frame to orient the double sided adhesive strip on the side of the stretchers towards the canvas or material while maintaining the adhesive strip from touching the canvas or material. After alignment, the stretching bars are pressed down and attached onto the canvas or material and the corners are released. The corner clamps are removed and canvas or material corners are cut and folded into the open miter ends which also have adhesive strips. By rotating the stretchers axially 90 degrees into the final frame, thus closing the miters, and upon inserting U-shaped fasteners into grooves placed on the back of the stretcher the canvas or material is stretched and ready to display.

Abstract: A window blind frame system is provided comprising a window blind secured to a frame and optionally at least one frame-securing clip for releasably retaining the frame in position relative to the window casing. The frame may comprise at least two angle joints connecting at least three extruded portions to form a substantially rigid structure, wherein a window blind may be attached to the frame and wherein the frame is configured to interact with a frame-securing clip which releasably retains the frame in position relative to a window casing. The components of the window blind frame system may be provided in kit form. Methods of assembly and fitting of the window blind frame system are also provided.

Abstract: A printing screen, comprising a sheet, at least sections of at least one pair of opposite edges of which are folded such as to define attachment elements, and a printing screen unit including at least one pair of interface members attachable to the attachment elements at the at least one pair of opposite edges of the sheet.

Abstract: A panel of material enabled in an erect unfurled position using one or more diagonal support members attached at diagonal corners. Vertical and/or horizontal support members increase panel rigidity. Connecting at least three panels produces a collapsible upright flexible enclosure. Attaching a bottom panel produces a container. Attaching carrying straps to the top of the upright flexible container allows it to be carried and folded up. A panel can be attached to the top edges permanently or with some type of fastening means. The present invention can also be used as a housing structure. Placing a grommet in the middle of the roof and using a vertical pole to hold the roof up prevents roof sagging. Removing the roof's vertical support pole allows the roof to sag for rain water collection using a cistern in the middle of the enclosure. Support members can be removed for washing or folding.

Abstract: The window screen assembly of the present invention comprises a screen member affixed to a screen frame wherein the screen frame has at least one pair of opposing hinges. One such hinge is centrally located on one side of the screen frame and one centrally located on the opposite side of the screen frame such that both the screen frame and the screen itself fold upon rotation or pivoting of the hinges. The hinges can be located either on the horizontally disposed members of the screen frame or the vertical members of the screen frame, or both. In a preferred embodiment, the assembly further includes a plurality of retaining clips. The retaining clips are attachable to the window frame, such as with a screw, and the hinges slide into or are snapped into the retaining clip so as to hold the assembly in place while still allowing rotation of the hinges.

Abstract: A curved brace edge connection fitting and a curved brace window sash edge connection fitting and a window structure are provided. A coupling intensity of existing modular edge connection fittings can be heightened to simultaneously enhance air-tightness and heat insulation and to further provide effects of curved design and easy cleaning. The curved brace window frame edge connection fitting and the curved brace window sash edge connection fitting are used in a push-to-open window called a slider and a rotate-to-open window called a casement.

Abstract: A screen structure consists of a flexible screen mesh material retained in a plurality of edge engagement members forming a perimeter frame for the screen structure. Each of the engagement members is formed by a first part joined to a second part by a hinge structure. The first part has a wall formation extending longitudinally along and laterally therefrom. The wall formation is engagable in a complementary shaped groove to retain an edge region of the screen mesh material in the groove. Both of the wall formation and the groove are inclined in an outward direction when the wall formation is engaged in the groove.

Abstract: A sheet material tensioning apparatus includes frame members interconnected one with another to define a closed contour. The apparatus applies tension to sheet material by imposing a separation between frame members to expand the closed contour. Beneficially, the sheet material tensioning apparatus includes an edge-bridging mechanism, such as a spline, to span the gap between the separated frame members. The edge-bridging mechanism maintains the continuity of the edge supporting the sheet material. The sheet material apparatus may include a crossbar assembly to add rigidity to long frame members, while maintaining planar alignment even under considerable compression.

Abstract: A modular window blind assembly includes a blind-mounting frame adapted to be mounted on a window/door frame and including two vertical frame members and two horizontal frame members, a pleated blind having top and bottom ends connected detachably and respectively to the horizontal frame members, and a slide mounted detachably between and slidable relative to the horizontal frame members. First and second positioning plates are provided respectively at two opposite ends of the pleated blind between the top and bottom ends of the same. The first positioning plate is connected detachably to one of the vertical frame members. The slide is connected detachably to the second positioning plate, and has a receiving space to receive substantially entirely the pleated blind when the pleated blind is folded.

Abstract: The print screen frame tensioning system, generally rectangular in shape and fabricated from extruded rectangular tubular rails, when assembled, each side rail of the frame has a longitudinal one way channel, circular in cross sectional area, formed in each of the tubular rails for substantially the length of the tubular rails for receipt of a locking rod, the locking rod being axially serrated in order to accept a matching internally serrated standard wrench socket and the longitudinal channel being axially serrated, each locking rod having an additional internal tensioning fitting formed on both of its longitudinal ends for separate lateral tensioning.

Abstract: A device (1) for separating regions of a space, with at least one ceiling rail (3) for pressing on the ceiling (4) of the space, with at least one wall rail for making contact with the wall (7) of the space and with at least one floor rail (8) for resting on the floor (9) of the space. In order to prevent passage of dust through the separated region of the space, there is least one diagonal brace (36) for detachable mounting on the wall rail (5) and the floor rail (8) outside of the corner region (37) between the wall rail (5) and the floor rail (8) and for applying pressure to the middle region (38) of the wall rail (5) and that the diagonal brace (36) has a length which is greater than half the length of the wall rail (5).

Abstract: The present invention is directed to a method and apparatus for treating goods, such as, for example, fumigating and re-cooling perishable goods, such as fruit, using a tarp and floor seal. The apparatus encloses goods on a surface and includes a canopy that is substantially impermeable to flowable materials, such as gas, liquid, or a combination thereof; an upper perimeter for supporting an upper portion of the canopy; a lower perimeter for supporting a lower portion of the canopy, the lower perimeter to be placed in proximity to the surface; a support structure for supporting the upper perimeter and lower perimeters; and a gasket in communication with the lower perimeter, wherein the gasket is deformable to substantially seal the chamber by compressing the gasket against the surface. The apparatus may also include an intermediate support structure for providing support to the canopy and a conduit in communication with the chamber to supply cool air to the chamber.

Abstract: A sliding screen frame for a closure assembly having an opening and an existing track for mounting a screen, the screen frame has framing sections with both inner and outer side edges, and a housing from which a screen is payed out and accumulated. The framing sections are adapted on the outer side edge to interfit with the existing track of the closure assembly to enable the sliding screen frame to slide across the opening of the closure assembly and the frame sections also being adapted on the inner side edge thereof to support and guide the free end of the screen between a fully payed out and a fully accumulated position. The screen frame has a mitreless corner connector for connecting adjacent framing sections without the need for mitre cuts thereof to establish continuity between the corner connector and the adjacent framing sections.

Abstract: An improved window sash assembly which includes a sash held together by corner locks. The corner locks are all of similar construction, but may accommodate either tilt latch mechanisms or pivot terminal mechanisms. By utilizing a single corner bracket for both types of sash connectors, costs can be reduced and efficiencies increased. Additionally, the improved system imparts structural and sealing characteristics to the sash.

Abstract: A removable device has a screen, two stiles and two rails, connected by elbows. The rectangular screen admits light and air. The two stiles stand mutually parallel, rigid, and perpendicular to the horizon upon installation of the device in an opening. The two rails lie mutually parallel, rigid, and parallel to the horizon. The first elbows receive the rail coaxial with a first spring and the stile coaxial with a second spring while having gripping means. Slightly different, the second elbows have an adjusting means. The stiles and the rails connect to the elbows around the perimeter of the screen.

Abstract: A tent door which opens and closes in a manner similar to that of a regular house door, yet is in keeping with the requirements for mobility of being light-weight and easily taken apart or reassembled. Such a door being comprised of a fabric panel (54), supported by a rigid frame (22). The frame of this door panel is hinged to a similar frame (20) attached to the perimeter of a cutout opening (56) in the tent wall, against which the door closes. A latch secures the door and allows it to be released for opening by means of a single action which can be performed using just one hand. These are all takedown assemblies connected with manually operated fasteners and employing the lightest or smallest possible components.

Abstract: A door having four lineal door frame components, each of the lineal components having a cross-section defining an interior space extending in a longitudinal direction of the linear components. Four symmetric, L-shaped members are provided that each have a corner portion and two posts that extend from the corner portion at a right angle to one another. The posts each have a length and a plurality of fins extending therefrom along at least portions of the length. A metal reinforcement member is arranged in the hollow portion of the lineal components so as to extend substantially along the entire length of the lineal components and leave an empty portion of the hollow section at each end of the lineal components, which empty portions have a length equal to at least the length of the posts of the L-shaped body. The posts of the L-shaped members are mounted in the free hollow portions of the lineal components so that at least some of the fins engage an interior surface of the lineal components.

Abstract: A panel (10) for protecting a portion of a structure such as a window (11) includes a frame member (13) made up of four channel members (16-19) interconnected by corner members (20). One end of each channel member (16-19) includes an opening to receive an edge of a sheet (33) of flexible material. The sheet (33) is provided with a thickened area (34) near each edge thereof. A fabric locking and stretching member (15) closes the opening in each channel member (16-19) and engages the thickened area (34) of the fabric sheet (33) to stretch the sheet (33) within the frame member (13).

Abstract: This is a method and kit for making window coverings and frames and the like in which a multiplicity of frame members are held in position in a geometric shape and distorted inwardly towards a center of the frame by a distorting force after which a covering is adhered to the frame. When the covering is firmly adhered, the distorting force is released causing tension to be applied to the covering and insuring that the covering is taut and wrinkle free.

Abstract: A frame for a ventilation screen-frame assembly includes a body having a mounting surface for receiving ventilation screen material. In one example, the body has at least three V-shaped cuts partially through it. Each V-shaped cut leaves an edge of the body uncut. The body is folded about each uncut edge so that the ends of the body meet at a corner. Each V-shaped cut subtends an angle &thgr; that is slightly less than 90 degrees, so that the folded corners are in compression. The assembly further includes a single corner key for joining the ends of the body into a closed frame. A reinforcement clip can be used in each folded corner.