Abstract: A tie bracket for linking adjacent end studs of two or more stud wall subframes extending at an angle to each other, comprises a shaped element of sheet metal which includes a generally polygonal centre portion (12) defining at least three margins (14) intersecting at respective corners, for being accommodated between the end studs. A plurality of tabs (20) project respectively from at least two of the margins for engaging respective apertures in the end studs. Each tab is of a length in the direction of projection greater than its width and of broadly similar order to the lengths of the longer of said margins. Respective formations (28) are provided in each of the tabs to define alternative bending lines (29) spaced in the direction of projection.

Abstract: An angle bracket for joining two section bars has a relatively great stability, especially for use for partitions and safety walls. This stability is achieved by supporting walls that join the two legs of an angle bracket to one another and have an outwardly rounded outside contour. This design is relatively simple and inexpensive to implement and allows these angle brackets to be compatible with known designs.

Abstract: A moveable structural reinforcement system is described including a moveable panel, a metal frame structure connectable to the frame structure of a building opening, the frame structure including a top support member and lateral supports connected on a first end to the top support member, upper load members disposed on the top support member proximate the lateral supports, bottom load members disposed on the second ends of the lateral supports, and load transfer members disposed substantially diagonally on said panel and adapted to releasably engage the upper and lower load members. The load transfer members providing a substantially continuous load path when the panel is in a closed position and the building or structure is subjected to a lateral force.

Abstract: A shear frame assembly of the type having a pair of tensioned diagonal straps that provide resistance to shear loads. The shear frame assembly includes a pair of laterally opposed vertical supports each having a first end portion and each vertical support has an aperture in its first end portion. The aperture is sized to receive one of the tensioned diagonal straps therethrough. Transverse top and bottom plates extend between the end portions of the vertical supports. A strap-alignment member is positioned in each aperture and each alignment member is positioned to receive and align the tensioned strap within the aperture. A force distributing member is positioned in each aperture and interposed between the alignment member and the respective vertical support. Each vertical support is formed by three studs that are connected together by bands that wrap around the studs so as to sandwich the middle stud between inner and outer studs.

Abstract: A corner lock for a mitered corner of a hollow door or window frame includes a pair of braces positioned in the interior of the door or window frame at each corner. The braces are interlocked with one another and extend from an outward part to an inward part of each corner. The first brace is directly attached to interior walls of outward horizontal and vertical parts of a door or window frame. The second brace has an outward end attached to the first brace and an inward end that abuttingly engages the inward corner of the door or window frame. A central screw extends through the first brace and bears against the second brace when advanced. The first brace bends into a convexity and the second brace bends into a concavity when the central screw is advanced. A rigid leg that forms a part of the second brace includes a base that bears against an inward corner when the central screw is advanced so that the mitered corner is strenghthened and locked against movement.

Abstract: A frame for a door or window includes a plurality of frame portions, which may be lineals, and a plurality of corner blocks. For a door frame, three frame portions and two corner blocks are used. For a window frame, four frame portions and four corner portions are used. Each corner block comprises first and second mounting flange portions for attaching the corner block to a surface, such as an exterior wall of a building. First and second channel portions are each attached to a respective mounting flange portion. Each of the first and second channel portions is shaped to engage a respective one of a first and a second frame portions. A cover portion is attached to both of the first and second channel portions. The cover portion has first and second overlap portions which overlap the first and second frame portions, respectively, when the first and second channel portions engage the first and second frame portions. An ornamental "rosette" may be attached to the cover portion of the corner block.

Abstract: The four metal panel portions of an air conditioning unit roof curb have spaced sets of inwardly projecting lanced portions positioned adjacent their ends and defining tab-receiving slots. With the panel portions in a rectangular assembly orientation, specially designed drive cleats are used to lock the contiguous ends of the panel portions together at the corners of the curb. Each cleat has spaced pairs of tabs which, when the cleat is downwardly driven into place on a corner section of the curb, sequentially enter vertically successive pairs of slots in the contiguous panel end portions at the corner. In this manner, only one tab pair and one slot pair need to be aligned with one another before the cleat is driven into place to lock the two contiguous panel end portions to one another, the initial tab pair/slot pair alignment serving to automatically align the successive tab and slot pairs as the cleat is driven home.

Abstract: A corner assembly for a protective rollover structure of a work machine is disclosed. The corner assembly includes a first tube having a first inner wall, a first outer wall, a first right lateral wall, and a first left lateral wall which collective define a first interior space. The first inner wall of the first tube has a first gusset slot defined therein. The corner assembly also has a second tube having a second inner wall, a second outer wall, a second right lateral wall, and a second left lateral wall which collective define a second interior space. The second inner wall of the second tube has a second gusset slot defined therein. The corner assembly further includes a gusset having a first inner leg, a first outer leg, a second inner leg, and a second outer leg.

Abstract: Metal building framing components are joined with double-sided adhesive tape positioned between the first connection surface of a first metal framing component and a second connection surface of a second metal framing component. The connection surfaces may be a wall surface or the surface of a tab projecting from the end of a wall. The double-sided adhesive tape is formed of a closed-cell acrylic foam carrier having pressure sensitive adhesive on both sides.

Abstract: Disclosed is a structural material having a lattice configuration. In one embodiment of the invention, the structural material is manufactured by weaving a continuous wire filament on a loom assembly. In an alternative embodiment of the invention, the structural material is formed using substrate sheets that are machined or molded into a desired configuration. The structural material of the invention can be used alone or layered to form a multi-laminate material.

Abstract: A shear resisting member of a frame structure comprising four triangular cross-section beams, each beam or stud formed from a single piece of cold formed sheet steel which is bent lengthwise along four parallel lines to form a triangular cross-section with two wings or flanges, side-by-side, extending from its apex. Within the frame structure of the shear resisting member, two frame beams have first beam lengths corresponding to the longer dimension of the opening in the wall to be reinforced, which are disposed parallel to each other. The other two beams have second beam lengths substantially shorter than the first beam lengths, the second beam length corresponding to the spacing between the frame studs or truss members of the structure being reinforced. Gussets are attached along the lengths of the wings or flanges of the second beams and the ends of the first beams to fasten the frame structure together.

Abstract: A construction system for making latticework structures comprising connectors and rods. Each connector has a base portion with at least two side portions and opposing faces. A first attaching element is attached to a first side portion of the base portion. Second and third attaching elements are secured in axial alignment at spaced locations to a second side portion of the base portion. Respective connectors can be interconnected to each other by placing the first attaching element of one connector between the second and third axially aligned attaching elements of another connector and passing a rod through aligned receiving openings in each of the first, second and third attaching elements. Many of these connectors and rods may be assembled to form larger structures such as cubes, pyramids and other polyhedrons. The connectors themselves may take various shapes such as triangles, sectors and trapezoids.

Abstract: Disclosed is a structural material having a wire lattice configuration. The structural material can manufactured by first weaving a continuous wire filament on a loom assembly. Once woven into arrays of parallel wires, the filament is fixed in position and cut into segments. The segments are then placed in a rig. The rig positions the segments at relative angles so as to form a matrix or mesh. In the final step of the manufacturing process, the wires are welded together using, for example, a forge press. Alternatively, the material can be formed by first holding wire segments in a pair of rigs and then sequentially welding the wire segments together. The structural material of the invention can be used alone or layered to form a multilaminate material.

Abstract: The invention relates to cross bracing for wooden structures, formed by vertical posts (21), horizontal beams (22) intersecting each other at junctions, braces (23, 24, 25) situated diagonally between two adjacent junctions, and gussets (35-40) which connect the braces to the beams and the posts. The braces comprise transverse grooves (41) near their ends, and the gussets comprise a heel (45) at least one of their ends which can engage in one of the grooves in the braces.

Abstract: The present invention comprises a metal brace consisting of a strip of sheet metal the side portions of which are doubled over or bent through about 180 degrees, so that the strip, or at least a nailing flange of the strip, is of double thickness sheet metal. In this way the raw edges of the strip are safely displaced from the sides of the brace. Moreover, it has been found that it is much easier to drive a nail through two superimposed thicknesses of sheet metal than to drive it through a single piece of sheet metal of double the thickness. Therefore the bracing strip according to the invention made of light gauge sheet metal may have high strength in compression, but be easier to nail, without preformed nail holes, than a conventional bracing strip. An alternative embodiment may have formed in it a plurality of access locations to use as nail holes.

Abstract: The present invention comprises a metal brace consisting of a strip of sheet metal the side portions of which are doubled over or bent through about 180 degrees, so that the strip, or at least a nailing flange of the strip, is of double thickness sheet metal. In this way the raw edges of the strip are safely displaced from the sides of the brace. Moreover, it has been found that it is much easier to drive a nail through two superimposed thicknesses of sheet metal than to drive it through a single piece of sheet metal of double the thickness. Therefore the bracing strip according to the invention made of light gauge sheet metal may have high strength in compression, but be easier to nail, without preformed nail holes, than a conventional bracing strip. An alternative embodiment may have formed in it a plurality of access locations to use as nail holes.

Abstract: An improved interlocking shelf bracket which includes a body member of generally "L"-shaped configuration with first and second legs extending from a common apex. The first leg comprises a planar surface having a flange member extending therefrom, and with the flange member including an inverted "U"-shaped tabular receiving channel. The second leg is provided with a flange in the form of a tabular projection to be received within the channel. Means in the form of obliquely arranged slots are provided along inter-engaging surfaces of the bracket member in order to accommodate conventional fasteners and to interlock the mating brackets together, one to another. The obliquely arranged fastener receiving slots provide additional rigidity and stability to the overall assembly.

Abstract: An interlocking shelf bracket of simple and durable design which is arranged to be utilized with lumber and/or shelving with two or more standard thickness dimensions. The shelf bracket comprises a generally "L"-shaped connection member with an angular body and with triangular-shaped interlocking projections which engage corresponding openings of a neighboring member of like configuration. The shelf bracket of the present invention is designed to be used with conventional fasteners including screws and nails.

Abstract: An acoustical divider panel and a frame for such panel are provided in which top and bottom frame members of equal length and opposed side frame members of equal length are joined at their ends by a miter joint to form a rectangular frame. Each of the four members are formed of a U-shaped channel opening outwardly from the frame and each of the edges of said channels are provided with an outwardly facing grooved channel extending along its length for receiving the edges of a sheet of fabric. The interior of the grooved channels contain an undercut portion adapted to secure the edges of said fabric and welting. The frame is preferably formed with one of the frame members at each of said miter joints having an extended outer edge, whereby the amount of offset between said adjoining members can be adjusted.

Abstract: A connecting element for the connection of sectional steel columns with roof trusses consisting of wood and exhibiting mutually converging lateral faces, for the erection of hall constructions and the like. The roof truss (2) has an end face (17) in flush contact with the column (1) and a steel band (16) is attached to the topside of the roof truss (2) for connection with the column (1) which latter is beveled in correspondence with the slope of the roof. This steel band is connectible with the column (1) by welding or by a flange plate (15) fastened to the column (1). A haunch-shaped supporting element (18) is provided on the inside between the column (1) and the roof truss (2).

Abstract: A method of constructing multiple story buildings and particularly detention structures as disclosed in which the framing members are lightweight steel channel members which are generally similar and in certain applications, interchangeable. The walls and floors of the building are framed with the channel members and lath sheathing is applied thereto for receiving cementitious fill therebetween. A unique diagonal tension strap system is used whereby diagonal straps are permanently attached at their lower end and tensioned at their upper end with adjustable fasteners before being permanently fastended at the upper end. The system provides for a more rapid and inexpensive construction schedule over conventional construction and affords high resistance to fire and to penetration of the filled walls.

Abstract: A fixture for holding workpieces at predetermined angles while they are being interconnected includes a pair of legs and a hypotenuse forming a right triangle, whose three vertices are truncated to enable the fixture to function as a jig, as a template, or as a bending tool. Workpieces may easily be attached to the fixture, obviating the need for special clamps.

Abstract: A kit of parts for constructing a loft hatch frame comprises four extruded `T`-section mouldings 12 and four corner plates 14. Each moulding 12 comprises an elongate face plate 12a and an upstanding longitudinal web 12b upstanding generally centrally from the face plate. In use the mouldings 12 are cut slightly shorter than the sides of the loft access opening, and nailed to the ceiling purlins through the upstanding webs 12b. The face plates 12a closely abut the ceiling and together provide an internal shoulder on which an access panel rests. Each of the four corner plates 14 has a pair of recesses 16 formed therein, shaped to receive the ends of the face plates 12a of a pair of the extruded mouldings 12. Thus the corner plates 14 mask the junction between adjacent mouldings 12, and provide a neat finish even though the mouldings have not been cut to exact length.

Abstract: A diagonal ceiling brace for ceiling suspension systems. The ceiling suspension system contains a plurality of parallel longitudinal beams and a plurality of parallel cross beams. The longitudinal beams and the cross beams are connected to each other at intersecting junctions. The diagonal ceiling brace comprises an elongated main bar having a horizontal plate formed at each end thereof. Each horizontal plate has a front edge containing a pair of surfaces defining a generally 90.degree. angle for enabling the plate to abut a junction of one of the longitudinal beams and one of the parallel cross beams. A releasable hook locks the brace to the beams at the junction.

Abstract: A lattice bridge construction system is characterised by the provision of lattice panels (A,B,C) which are of substantially identical length but of different depths relative to one another such that when variously combined one with another, with or without additional reinforcement, trusses having considerably more economic increments of bending strength may be achieved.

Abstract: The disclosure relates to a chassis for such a type or trolley, shelf or the like which, as part of a modular system, is used for meeting different transport or storage needs at offices, in workshops or the like and which comprises chassis members which are constructed from a number of perforated square tubes and on which wheels, feet or the like are fixed. According to the disclosure, the chassis has, at its corners, composite structures which are rigid in the spatial plane of extent of the chassis but are yieldable in another direction. The composite structures consist partly of angular connecting pieces which for example consist of rubber and have projections which extend into mutually meeting end portions of the chassis members and partly of plate or disc-shaped joining pieces which are produced from slighlty flexible sheet metal material and are disposed only on the underside of the chassis. The joining pieces have ridges which engage in perforations in the chassis members.

Abstract: A bed spring assembly comprising a rectangular frame having a pair of end members and a pair of side members and arcuate corners joining said side members to said end members,said members having top and bottom walls,each bottom wall having a cut out subtending each corner,a filler plate covering the corner cut out and having a leg at the one end extending into the adjacent side member and having another leg at the other end extending into the adjacent end member, and means for connecting said legs to the respective members,said plate having an arcuate portion complementally fitting into the adjacent corner,means for securing spring-covering fabric to the frame comprising upwardly and inwardly angled flanges on the inner edges of the bottom walls of the side and end members,and similarly angled flanges on the inner edges of said legs and intermediate portion of each filler plate.

Abstract: A structural member for bracing adjacent wooden studs of a wall frame comprised of an elongated body portion having mounting portions at the ends thereof, which mounting portions include outwardly facing end surfaces generally parallel to each other and oblique to the body portion, side surfaces perpendicular to and laterally offset from the end surfaces, and means for forming a third surface facing and parallel to the first surface wherein three surface engagement between the structural member and the stud is provided.

Abstract: A panel comprising a perimeter frame, a pair of skins spaced apart by the perimeter frame, and load distributing connecting members at the corners of the frame. The perimeter frame is formed from members having two oppositely directed channels so that when a pair of panels are positioned in a side by side relationship one channel of the perimeter frame of one panel will enter the other channel of the perimeter frame of the adjacent panel. The load distributing connecting members have a tongue to engage the inwardly facing channel of the perimeter frame. The invention also comprises a building having a floor, walls, ceiling, and roof wherein at least the walls are formed of panels according to the invention.

Abstract: A substantially rigid structural joint can be assembled from an assembly made up of a pair of separate joinery parts. Each joinery part is preferably in the form of a rigid rectangular-shaped, sheet metal strip. One joinery part has a bracing member connected to and extending outwardly from one of its longitudinal sides in an orthogonal relationship. The bracing member also extends toward and along one of the longitudinal sides of the other joinery part when the latter is placed in an erected condition with the one joinery part. In such condition, they extend in orthogonal relationship to one another and have end portions which form a corner therebetween. Interengagable male and female elements on end portions of the joinery parts adjacent the corner are mated together when the parts are placed in their erected condition.

Abstract: There is disclosed a door framing system for a barn door or the like wherein a plurality of horizontal and vertical frame members are joined together to define a generally rectilinear frame structure. All of the frame members are fabricated from substantially U-shaped channel members of similar cross-section, such that they may be cut from stock material of said U-shaped cross-section. Corner joining brackets are employed which include a pair of transversely disposed base sections, with spaced side flanges extending from each said base section to provide a U-shaped surface configuration which will embrace the outer side faces of the frame members. The brackets including clamping means for coupling the brackets to the respective frame members.

Abstract: There is disclosed a door framing system for a barn door or the like wherein a plurality of horizontal and vertical frame members are joined together to define a generally rectilinear frame structure. All of the frame members are fabricated from substantially U-shaped channel members or similar cross-section, such that they may be cut from stock material of said U-shaped cross-section. Corner joining brackets are employed which include a pair of transversely disposed base sections, with spaced side flanges extending from each said base section to provide a U-shaped surface configuration which will embrace the outer side faces of the frame members. The brackets including clamping means for coupling the brackets to the respective frame members.

Abstract: A bracing element comprises a pair of metal members 1A' and 1A" which have respective cross-sectional shapes which approximate one another and which enable one member 1A' to be retained and accommodated in a slidable nested relationship with the other member 1A" so that relative movement of the members 1A' and 1A" can telescope the members so as to extend the overall length of the bracing element. In another embodiment the inner of the two members has part of its cross-sectional shape compressed so that the compressed portion can be slidably accommodated within the uncompressed cross-sectional shape of the outer of the two members.

Abstract: A composite structure window belt has a roll of the lined reinforced plastic window frames set between honeycomb core and covered top and bottom with a reinforced plastic cover. The window frames have built-in reinforcements to accept fasteners for securing windows within the diamond-shaped openings.

Abstract: A method for providing earthquake reinforcement for existing buildings by applying pre-compressive or pre-tensile stresses. In a first embodiment, a compression brace is provided on the beam pillar structure of the building in a diagonal direction to the structure so as to apply a pre-compressive stress to the compression brace. In another embodiment, a tension brace is provided on the beam pillar structure of the building so as to apply a pre-tensile stress to the tension brace in order to reinforce the building against an earthquake.

Abstract: Beams or girders composed of fiber-reinforced polymers or plastics can be adhesively bonded into structural members by means of an interconnecting joint of such material having an arch structure which is positioned and arranged so that it provides a flexibility that tends to reduce peel failures of the adhesive bonds between the joint and beams or girders.

Abstract: In a wall construction comprising a pair of top plates, a bottom plate and plurality of parallel joists connected between the top and bottom plates, a wall brace is secured in a plurality of aligned saw kerfs to increase the load carrying capability of the wall structure. The brace includes a substantially U-shaped base portion and a pair of side flanges extending normal to the base portion such that the brace is substantially T-shaped in cross section. The brace is specifically designed so that the moment of inertia about the major axis (an axis aligned in the direction of the base) is greater than the moment of inertia about the minor axis (an axis aligned in the direction of the flanges). The preferred construction of the wall structure assures that failure of the brace upon overloading of the wall structure is caused to occur within the plane of the wall.

Abstract: A prestressed structural member is described in which there is provided in combination a pair of longitudinal elements, a plurality of strut elements, a plurality of diagonal members and a plurality of joint connector means for rigidly interconnecting the strut elements and diagonal elements together and the same to the longitudinal elements. The longitudinal elements are spaced apart and prestressed in compression. The strut elements are also spaced apart and each strut element extends between the longitudinal elements, and is disposed orthogonally of a line equidistant from each longitudinal element. The strut elements are also prestressed in compression. The diagonal members are oriented diagonally in pairs in box sections or bays delimited by the longitudinal and strut elements and with the strut elements form a lattice structure. The diagonal members are prestressed in tension.

Abstract: A metal cross support is provided for use with a wooden truss structure of the type having a plurality of spaced wooden truss elements with a wooden stringer extending across at least one end of the truss elements and generally perpendicular thereto. A narrow and transversely extending channel is formed in each truss element so that the channels are in alignment with each other. The cross support comprises an elongated strip having a portion which is insertable into the aligned channel so that upon insertion, the metal strip is frictionally attached to the wooden truss elements. In addition, an overlapping portion at at least one end of the metal strip lies in a horizontal plane, abuts against and is attached to a corresponding horizontal surface.

Abstract: The building is to be constructed of a plurality of interconnected building panels. Each said building panel is to be of a square or rectangular or other convenient polygonal shape and is to include a plurality of corner members with each corner member including a pair of openings, the longitudinal center axes of which intersect. The corner members include a web section which is to be connectable with a brace assembly. An end of an elongated tubular member is to be telescopingly located within each opening of a corner member with the arrangement of the elongated tubular members forming an enclosed area. There is to be a pair of separate brace assemblies located in a crossed arrangement across the enclosed area. Each brace assembly is composed of a pair of members which are interconnected together by a turnbuckle for the purpose of adjustment. Each corner member is constructed of two identical members assembled in a mirror image relationship and welded together.

Abstract: A support system for mobile home having a chassis formed of a plurality of spaced, parallel support beams having an "I"-shaped cross section comprising a plurality of support member assemblies each of which has a planar base, a vertically extending portion having a predetermined external dimension and shape, aligned base tabs which extend from the vertically extended support member and spaced a predetermined distance from the vertically extending portion of the base, an adjustment ring which has an internal dimension and shape to enable the ring to be slideably positioned circumferentially around the exterior of the vertically extending portion of the base wherein the wall thickness of the ring is about equal to the distance between the vertically extending portion of the base and tab members; a top member which has an extended lower portion formed to have an internal geometrical dimension which is shaped to receive and slide over the vertically extending portion of the base and into contact with the edge of

Abstract: A metal door frame assembly comprising two jambs and a lintel, all of the same crosssectional shape, which includes a central door striker portion flanked on its two sides by an inner web and an outer web respectively, each web terminating in a respective end flange which itself terminates in a inturn flange, each inturn flange terminating in an returned flange. Assembly of the jambs and lintel is effected by mitre joints, and at each mitre joint there is a bridging strip which extends between the facing surfaces of the end flanges, and which bears against the rear surfaces of the inner and outer webs of the jamb and lintel. The bridging strip is retained in position by a pair of locking plates, each of which has a pair of tabs which engage respective apertures in the returned flanges of the jamb and lintel.

Abstract: Wind and rack resistant cross bracing for wood truss building wall construction and which includes a metal strip or strap formed to include a pair of oppositely disposed lateral flanges having a depending reversely bent or U-shaped leg therebetween with a rolled bead formed in one or both opposite side walls; to extend the full length thereof and provide spring resistant spacing of the side walls of the leg portion for tight fitted engagement in a receptive channel groove or slot in the wall studs with which it is used and added rigidity against compressive loads in use and service.

Abstract: A one piece corner gusset for rigidly attaching the miter corners of hollow frame structures employed in the fabrication of various sheet metal members, such as some types of doors including screen doors. The gusset is comprised of a metal bar formed into a generally right triangular configuration, the two right angular legs thereof being connected by a hypotenuse portion which functions as a draw bar to properly align and maintain a rigid connection between two right angularly disposed hollow frame members when the gusset is positioned therein and fastened in place by any suitable fastening means such as screws.

Abstract: This door omits the usual metal frame for supporting a pane of glass. Hinges are mounted on channel trim strips on the adjacent edges of a pair of the glass panes to provide a two panel folding door. The lower hinge has a spring catch to hold the door closed. The trim strips are secured in assembled relation on the horizontal and vertical edges of the glass by snap fit engagement with four corner connectors within the channels, without screws or welds. On one of the panels two of the corner connectors have pivot posts for mounting the door in a stationary frame and on the other panel two of the corner connectors have guide posts which slide in grooves in said frame. Thus the trim strips and corner connectors themselves form a frame for the glass in each door panel.

Abstract: A corner clip for securing fins for a window product which extend outwardly from the sides. The corner clip is in the form of a base plate having two generally perpendicular legs each of which is defined by an inner and an outer side. Lips extend upwardly along the inner side of each leg and channels extend along the outer side of each leg. The lips engage a slot formed between the clip and the window product and the channels engage the edges of the fins. The length of each channel on each leg is at least as long as the length of the engaged portion of the lip.

Abstract: A corner gusset for fastening the corners of a hollow frame structure such as those employed in the fabrication of some types of doors. The gusset comprises a first member providing two legs in the general form of an angle bracket with inwardly turned end flanges, and a second member, comprising a draw-bar, fixed in a spanning relation between the two legs of the angle bracket. Opposed end portions of the draw-bar are angled relative to the main span thereof to lie against the respective inner faces of the two legs adjacent the inwardly turned end flanges. An outwardly extending lug from each of the angled end portions extends through a companionately shaped end sized hole through one of the inwardly turned end portions to securely hold the two members in assembly.

Abstract: A frame of rectangular shape particularly for stretching a piece of painting canvas, the frame comprising four strips connected between each other at the ends by means of joints of box-like configuration. The joints are made of sheet material and bent to define two converging channels in which the ends of corresponding strips are slidably inserted and retained. A V-shaped spring is inserted at the converging area of the channels and has two legs resiliently acting on the strip ends to cause stretching of the painting canvas held on the frame.

Abstract: A structural member for bracing adjacent wooden studs of a wall frame comprised of an elongated body portion having mounting portions at the ends thereof, which mounting portions include outwardly facing end surfaces generally parallel to each other and oblique to the body portion, side surfaces perpendicular to and laterally offset from the end surfaces, and means for forming a third surface facing and parallel to the first surface wherein three surface engagement between the structural member and the stud is provided.

Abstract: A lattice bridge construction system is characterized by the provision of lattice panels (A,B,C) which are of substantially identical length but of different depths relative to one another such that when variously combined one with another, with or without additional reinforcement, trusses having considerably more economic increments of bending strength may be achieved.