Abstract: A set of like, elongated assembly elements for assembly into a decorative panel, in which each element is formed with a plurality of square notches at equally spaced intervals along its length to permit them to be assembled together according to an egg-crate configuration, with each element being further formed with a plurality of triangular notches in each side face, such that when a plurality of the elements are assembled together, the triangular notches form a plurality of openings each in the shape of a six-pointed star.

Abstract: An improved means for securing planking to a horizontal support in a platform having a plurality of vertical support frames laterally joined with cross braces for use in constructing bleachers, risers and stages. The vertical support frames have horizontal supports for planking and means are concealed within the underside of the planking to prevent the planking from uplifting or shifting from end to end or back and forth on the horizontal support. The means are in the form of male and female mating endcaps for the planking in cooperation with a hook provided on the horizontal support.

Abstract: A cover assembly for an opening comprises a frame and a covering. At least one elastically deformable, rod-like closing member, which extends substantially in a horizontal plane, is provided on the covering. The closing member forms one part of a locking device, the other part of which is a retaining member which includes a groove provided in the frame, in which can engage a closing finger of the closing member accompanied by an elastic bending of the closing finger in the horizontal plane.

Abstract: A compression molded fiberglass reinforced resin grating formed of laterally spaced intersecting load bearing bars and cross bars is partially embedded within a layer of sand overlying the floor material of an animal stall defined by a vertical wall enclosure. At least the load bearing bars of the grating have flat top and bottom surfaces with opposite oblique sidewalls which taper towards each other from the bottom to the top. When embedded in the sand with the flat top surfaces exposed, the tapered load bearing bars resist downward movement into the sand layer due to the wider flat bottoms of the load bearing bars. Sand captured between opposed oppositely oblique walls of adjacent load bearing bars is solidly packed therebetween forming with the load bearing bars and the cross bars a solid mass to further resist downward movement, while permitting drainage of liquid waste therethrough. Soiled bedding may be removed from the top of the embedded grating by shoveling.

Abstract: A tray assembly for a germination floor assembly having a perforation tray sheet affixed to a rectangular frame assembly. The frame assembly includes a pair of parallel side members interconnected by a pair of end cross frame members. A plurality of longitudinal ribs extend parallel to the side members between the cross frame members. Reinforcing cross bars further extend between the side members and the longitudinal ribs. The cross frame members and reinforcing cross bars have a unique configuration to provide unimpeded flow of liquid wash through the tray assembly during cleaning. A tray assembly is attached to an adjacent tray by a bolt assembly. The tray assembly may be attached to supporting I-beams by hold down clamps. In one embodiment risers are employed for enhanced free flow of liquid wash during cleaning.

Abstract: An improved grating construction of the type intended for closing or flooring an opening. The construction preferably is formed of aluminum and includes a plurality of spaced, parallel, elongated bearing bars and a plurality of spaced, parallel, elongated, transversely extending crossbars. Each bearing bar has a generally flat, rectangular shape and has a plurality of spaced cutouts formed along a top longitudinal edge thereof. Each cutout comprises an upper rectangular-shaped portion and an outwardly flared lower portion. Each crossbar has a rectangular-shaped top portion and an outwardly flared lower portion, which portions are complementary in shape and size to the upper and lower portions of the bearing bar cutouts. The crossbars are slideably received within a plurality of transversely aligned bearing bar cutouts. The crossbars are deformed or swaged at locations adjacent to and on opposite sides of the cutouts engaged by the crossbars to lock the crossbars in the bearing bars to form the grating.

Abstract: A runner system is provided to position a new ceiling over an existing ceiling and to position the new ceiling within a one to two inch space from the surface of the existing ceiling. Two z-shaped runners are fastened to the existing ceiling and ceiling boards will rest on the horizontal flanges of the z-shaped runners. A cross-runner is also designed to rest upon the horizontal flanges of the z-shaped runners and a projection and notch arrangement locks the cross-runners in position between the two adjacent z-shaped runners.

Abstract: A cover assembly for an opening comprises a frame and a covering. At least one elastically deformable, rod-like closing member is provided on the covering. The closing member forms one part of a locking device, the other part of which is a retaining member which includes a groove provided in the frame, in which can engage a closing finger located on the closing member accompanied by the elastic deformation of the closing member. Thus, in a simple manner, the covering is positively secured in the frame.

Abstract: A safety grid for center discharge grain boxes includes cross members and longitudinally extending rod members. The grid may be fitted to grain boxes having varying sizes through the use of an adjustable bolt movably connected to the cross members and connected to the box side walls. The cross members may be either tubular or L-shaped in cross section and are interconnected by longitudinally extending rod members.

Abstract: The invention relates to a framework structure for a "cottage pane" style door or window. The framework structure includes a series of tubular framework elements defining formations whereby these elements are frictionally held together in their operative configuration. When so held, tie rods can pass through the auxiliary elements and apertures in the primary elements for bracing the complete structure into a unit.

Abstract: A suspended ceiling constructed of wood having main beams and cross beams arranged to receive and support ceiling tiles. Each beam having horizontally projecting side extensions with the ends of the cross beams being grooved to frictionally fit on the side extensions of the main beam.

Abstract: A lattice comprises a set of tubular strips fastened together at designated crossings that have openings formed in the surface of each strip that faces and is overlayed by the other strip. The tubular strips are fastened together by resilient fasteners that are snapped into the strip openings.

Abstract: A clean room ceiling grid system having a detent means for loading filter panels into ceiling grids from a clean room. The system is operable to permit removal of the filter panels by use of a filter panel removing tool. More particularly, this clean room ceiling grid system requires no plenum space use above the grid members for either installation or removal of filter panels. The system also includes means for hermetically sealing the interface of connected ceiling grid members and means for substantially laminar flow of filtered air in clean rooms.

Abstract: This invention discloses a honeycomb structure comprising a network of hexagonal substructures sandwiched between two geodesic structures including network of triangular substructures wherein the corners of the triangular substructures are fastened to the alternating corners of the hexagonal substructures.

Abstract: A suspended ceiling grid member which comprises a web portion, an upper bulb extending along the top of the web portion, a pair of flanges extending outwardly from the bottom of the web portion, the flanges being adapted to support ceiling tiles, and a lower bulb extending downwardly from the flanges, whereby the lower bulb provides greater strength to the suspended ceiling grid member and also enhances the appearance thereof.

Abstract: Collapsible gridworks for confining fluent materials within cells defined by the gridworks to form stable columns capable of withstanding substantial vertical and horizontal loading are each made up of a plurality of interwoven/intermeshed longitudinal and latitudinal strips. In the preferred embodiment, the strips include slots formed on alternating sides thereof, with the gridworks being formed by interweaving the slots on one side of the longitudinal strips with corresponding slots on the opposite side of the latitudinal strips such that the gridwork is defined by mechanically interlocking joints which permit motion for collapsing the gridwork into both a multilayer strip and a substantially flat sheet. The open state of the gridwork and both of its collapsed states are similarly stable and can be freely handled without fear of the gridwork falling apart.

Abstract: A wooden suspending ceiling system is disclosed comprising a plurality of parallel wooden runners extending in one direction, and a plurality of parallel wooden cross members supported by the runners and extending in a second direction perpendicular to the runners defining a generally rectangular grid system having a plurality of openings therein. Ceiling panels, lighting fixtures, or air vents are supported by the runners and cross members defining the rectangualr grid system and closing the openings therein. The runners and the cross members have an upper face and a bottom face, with the bottom face being viewable from below. The upper face of both the runner and cross members comprises a central portion with a groove on each side of the central portion, and with a lip outboard of each of the grooves. The inner surface of the lip defines the outer surface of the groove on each side of the central portion, and with a lip outboard of each of the grooves.

Abstract: A grating bar for floor mats. The bar has two legs that form the walls of a U-shaped profiled strip. Cleaning elements are disposed between these walls, and the latter are provided with openings for holding elements. Provided on the outer surfaces of the walls, between the openings and the free ends of the legs, are projections that can be united to form an element that extends over the entire length of the bar.

Abstract: An interlock grate structure is provided which includes longitudinal load bearing span bars having lateral locating slots spaced therealong for receiving transverse tie bars and transverse tie bars having axial locking means which engage the longitudinal span bar at the point of juncture and prevent axial displacement of the tie bar relative to the span bar. A longitudinal interlock member serves to interlock the position of the transverse tie bar locking means with respect to the longitudinal span bar and in some instances provides added structural support.

Abstract: A fiberglass reinforced molded resin grating is formed of first and second sets of mutually parallel, interlocking fiberglass reinforced molded resin bars with the sets extending transversely to one another. One set consists of bearing bars of rectangular cross section including at longitudinally spaced positions within an upper edge, inverted U-shaped notches including oppositely directed, downwardly and outwardly oblique slots terminating at their upper ends adjacent the upper edge of the bearing bars in upwardly and outwardly diverging oblique cam surfaces. The second set of bars consist of cross bars of inverted U-shaped cross section including a horizontal base portion and a pair of downwardly and outwardly diverging legs of a thickness equal to the width of the diverging slots and being respectively received in said slots.

Abstract: A drywall furring system comprises a plurality of longitudinal carrying channels having congruent tongues co-planar with, spaced apart along and depending from the opposite flanges of the channels and a plurality of furring channels having pairs of slots spaced apart along the opposite flanges thereof. On opposite edges of the tongues there are tabs tapering upwardly from the rounded corners thereof and elongated, narrow fingers whose lower margins angle up from a point space apart from the distal edges of the tongues. The tabs and fingers have seats in the same horizontal plane and the fingers have retaining hooks extending up beyond the seats. A gridwork of the carrying channels and furring channels is constructed by aligning opposed congruent fingers of the former with a pair of slots in the latter and passing the fingers through the slots and pushing the opposite flanges of the furring channel over the rounded corners of the tongues so that the furring strips rest on the seats of the fingers and tabs.

Abstract: A suspended island ceiling system is disclosed in which conventional grid runners are interconnected to produce a rectangular grid. The grid defines openings in which ceiling panels are supported. The grid includes perimeter runners and inner runners which connect at their ends to the perimeter runners at spaced locations along the length of the perimeter runners. Channel-shaped border members are supported on the perimeter runners and provide a finished edge appearance for the island. The border members provide an outer vertically extending base wall and vertically spaced, horizontally extending legs. The upper leg extends over the adjacent perimeter runner and engages the upper surface and one side of the bulb thereof. The lower leg extends along the lower side of the perimeter runners and engages the lower side and at least one side of the flange of the perimeter runners.

Abstract: A decorative suspended ceiling system in which panels containing strips of decorative material, such as wood, are designed to be installed in connection with a standard metal grid system. The panels are laid in place in the grid and are therefore easily removed for access to the area above the suspended ceiling. When installed, the grid is camouflaged by the panels giving the appearance of a free-flowing ceiling with uniform spacing between all of the decorative members.

Abstract: In a suspended ceiling grid structure adapted to support ceiling tiles or the like, connecting apparatus between ceiling grid inverted T main and cross members disposed at right angles to each other and having upright central fins and bottom horizontal flanges comprise a vertically disposed belt loop formed in the central fin of the main member, a locking tongue extending from each end of the cross members in opposite directions at substantially right angles from the central fin of the cross member, a stiffening bead formed in the central fin of the cross member at each end of the cross member and extending through the locking tongues to an outer end portion of the locking tongues, a locking bump formed in the stiffening bead in the outer end portion of the locking tongues, positive stop shoulders at the top and bottom of the locking tongue contacting the rear edge of the belt loop on the main member when the locking tongue is fully inserted into the belt loop, and a sloping surface on the rear of the locking

Abstract: A grid, the size of which is selectable to conform to a window opening, or the like, comprising(a) multiple couplings, and(b) elongated grid members having slidable telescopic interfit with said couplings to define(i) peripheral frame members, and(ii) other members which extend between the frame members.

Abstract: A composite cruciform structure adapted for securely joining two or more intersecting fiber based composite structural members of an airframe and the like, is disclosed. A first bundle of graphite or other fibers of high strength is intimately interwoven with a second bundle of like fibers, with each bundle of fibers extending in a different direction and being aligned with the general longitudinal axis of a respective first and second composite structural member. A third bundle of fibers is interwoven with both the first and second bundles of fibers to form the cruciform structure. The bundles of fibers are reinforced with a suitable cured resin. The cruciform structure may comprise an integral part of the respective structural members, or may be attached thereto by splicing.

Abstract: Structural members extending between purlins in the roof support for metal buildings include different types of end support elements secured to flanges of the purlins and have a modified "V" cross sectional configuration for structural integrity. Different end configurations are utilized for different types of purlins.

Abstract: A floor system is provided to bridge between spaced apart frame members while providing ready access to the area covered by the floor system. An interlocking arrangement of removable components is used with major transverse floor elements having a modified channel section that interlocks with receiving extensions of anchored floor plates.

Abstract: A concrete reinforcing unit adapted to be embedded in the concrete for concrete construction. The concrete reinforcing unit includes: first parallel textile elements; second parallel textile elements crossing the first parallel textile elements at first crossing portions, each of the first textile elements and the second textile elements including at least one row of first textiles and a first resin matrix, made of a first resin, for bonding the first textiles; and an attaching mechanism for attaching the first reinforcing elements and the second reinforcing elements at corresponding first crossing portions to form a grid member having opposite ends.

Abstract: A grill structure for use in connection with a combination screen and storm door, the grill being formed of vertical and horizontal channel members, the horizontal members comprising segments spacing the vertical members, rods extending through the channels of the horizontal members, the channels each having a rib therein and the rods each having a slot therein to receive a rod whereby the rods are non-rotatably disposed through the channels of said horizontal members to secure the framework of the grill, U-channel members from the perimeter of the grill and screws applied through said U-channel members into the ends of said rods secure the structure. The rods are held free from rotation and torsion therealong in securing the screws and the rods need not be held by hand against rotation as the screws are applied.

Abstract: In accordance with the various aspects of the invention, a spray booth media support module (1) includes a rectangular frame (5) which is of generally channel section. The frame forms opposing spaced end members (7) and connecting side members (8). One frame end has an inwardly bent lip (11) having spaced notches (13) therein. The opposed frame side members have slots (14). A generally rectangular grid (6) is adapted to be removably mounted to the frame. The grid includes spaced elements (15, 16) arrayed generally parallel to the frame end and side members. A plurality of wide prongs (17) extend outwardly from the grid for impaling an overspray-catching pad (4) thereon. At least several prongs are aligned in a vertical tier arrangement.

Abstract: A wall framework consisting essentially of vertical studs formed of sheet metal and horizontal channels extending through openings in the webs of the studs and locked firmly in the bottom portion of each opening by bendable sheet metal tabs formed at the sides of the upper portion of each opening, which tabs, when bent relatively inwardly, engage and hold the channel firmly in a desired position.

Abstract: A louvered ceiling construction especially suited for parabolic louvers is claimed. Runners, of the same hollow channel shape as the louver members, are provided with openings into which extensions carried by the louver members are secured. The extensions are entirely concealed within the channels so that a smooth and uniform appearance is presented from below.

Abstract: A runner and a ceiling system utilizing the runner as a main runner and cross-runner characterized by each of the runners being composed of a first member and a cap member. The first member is bent to form an inverted T-bar configuration with a groove extending inwardly from the flange of the T and the cap member having the same configuration and being secured on the flange of the T-bar configuration to form a channel with flange portions on each side for supporting panels of the ceiling system.

Abstract: A suspended ceiling, made up of a perfect framework of simple sheets, which from the esthetic and useful latticework covering the ceilings; these are long rectangular plastic or metal strips, with transversal semigrooves, spaced at modular dimensions and which enable the crossed assembly of the sheets themselves, thus forming the latticework; this latticework can be more or less dense, according to the distance between the semi-grooves. With this formation of the latticework, in the contour sheets of each covered surface there is a lengthwise series of small holes, through which the suspension hook rods are inserted. These rods are simple cylindrical wires with curved ends, like hooks, and with a bend in their longitudinal half, to ensure better suspension assembly between the latticework and the upper frame or contour support section.

Abstract: There is disclosed a longitudinally flexible reinforcing member built up from a plurality of conjoined layers having interstices therein and formed from steel wire or similar material. The members are preferably of plank-like form, and are particularly suitable for reinforcing a mortar lining to a sewer.

Abstract: A suspended-ceiling framework defining a skeletal support for ceiling panels in an elevator cab includes a right angle bracket with which to hang a section of framing rail from an elevator roof or other support structure. The bracket defines a horizontally-extending slot into which an outwardly-extending lug on the framing rail fits to enable the framing rail to be hooked onto and supported by the bracket, the lug including a downwardly-extending portion that just fits through the slot. A retaining clip mounted with one screw on the bracket after the lug is inserted extends into the slot to bear against and retain the lug in predetermined alignment as well as block removal.

Abstract: The specification discloses a preassembled iron reinforcing rod structure for reinforcing a concrete base of a building comprising lateral rods welded to horizontal side rods and interconnected with vertically oriented rotatable rods which may be folded over parallel to the side rods for transportation.

Abstract: Light steel joists may be spaced 24 inches o.c. under ceramic tile floors when floor bracing members are spaced at 16 inch o.c. intervals between the joists under such floors. Also made of light gauge steel, the bracing member is slotted to receive a return flange of a channel-shaped joist so that the tops of the joists and bracing members are co-planar.

Abstract: A beam for a fire-rated suspended ceiling structure wherien the beam has an inverted-T construction and includes a central web having a bulb at the top and a pair of oppositely disposed flanges at the bottom for supporting ceiling tiles, and an improved expansion relief section of the beam comprising a section of the web having a pair of spaced vertical cuts in the web and an horizontal cut extending between the upper ends of the vertical cuts to form a tab extending upwardly from the pair of flanges, the tab having an inverted triangular cut-out portion the apex thereof adjacent the pair of flanges and dividing the tab into two portions, a pair of protuberances formed in the upper edge of the tab portion contacting the upper portion of the web, and a section of the bulb having a crushed portion opposite the apex of the triangular cut-out portion, the crushed portion of the bulb having a substantially Z-shaped configuration whereby when the beam is subjected to expansion forces accompanying fire conditions th

Abstract: This invention relates to a honeycomb structure reinforced with geodesic structure. The honeycomb structure includes a plurality of elongated structural members with cross sections having a large moment of inertia, which are assembled into a hexagonal network. Each hexagonal subassembly included in the hexagonal network is reinforced by a first set of reinforcing elongated structural members disposed in a triangular pattern wherein three corners of the first reinforcing triangular subassembly disposed flush to one face of the hexagonal subassembly are respectively connected to one set of three alternate corners of the hexagonal subassembly and further reinforced by a second set of reinforcing elongated structural members disposed in a triangular pattern wherein three corners of the second reinforcing triangular subassembly disposed flush to the other face of the hexagonal subassembly are respectively connected to the other set of three alternate corners of the hexagonal subassembly.

Abstract: A fire-rated type suspension ceiling grid runner is disclosed having expansion means intermediate its ends which collapse when the runner expands due to elevated temperatures occurring during a fire or the like. The runner provides a boxlike panel supporting flange along the lower end of the web thereof in which slots are formed to define a flange segment and connecting legs. When the expansion means collapses, the flange segment is laterally displaced as a unit and remains connected to each adjacent portion of the boxlike flange by at least two longitudinally spaced legs. The displaced flange segment functions as a bridging beam which continues to connect the adjacent portions of the flange and maintain them in alignment so that a grid formed of the runners can continue to maintain proper support for panel even when fire conditions occur.

Abstract: A joint structure for a structural bar assembly, wherein a first bar and a hollow second bar are assembled by inserting of fitting a web of the first bar into a transverse slot of the second bar, and by restoring a stopper plate of the web elastically or forcibly to an upwardly inclined state so as to allow a top end of the stopper plate to engage or contact with an inner surface of a front wall of the second bar after the stopper plate passes through the slot. Joint portions of the first bar and the second bar are not pressed or hit strongly. There is no fear of rusting and eroding in the joint portions owing to injury of plating or painting layers.

Abstract: Device for aligning main runners in a diffuser system, comprising a flat base, upturned tabs at each end of the base, and a slotted lug depending perpendicularly from each tab, such lugs adapted to releasably mate with main runner slots.

Abstract: The invention provides a slot in the runner and lugs on a clip to allow sliding contact between the runner and the clip. This allows for expansion of the runner during a fire condition. The clip is fastened to the vertical web of an adjacent runner to fasten the runner structures together. Normally, a clip is provided on each end of one runner structure and it is mounted between two rigidly positioned other runner structures and the runner with the clips is capable of expansion and contraction under fire conditions without buckling.

Abstract: A plank grating assembly for forming decking, flooring or subflooring. Longitudinal metal planks have flanges on each side edge and trapezoidal openings in each flange. The planks are rigidly connected and supported by cross braces each having an inverted V shaped configuration. Each brace is slotted at both ends. The braces can be inserted through the openings in the plank flanges and then rotated to an assembled position in which the edges of adjacent openings are closely received in the slots of the braces.

Abstract: A reinforcement mat for reinforced concrete consists of longitudinal wires and crosswires which are welded together at their points of cross. End portions of the crosswires project out beyond the edge longitudinal wires and are bent back in the plane of the mat towards the edge longitudinal wires. The longitudinal wires are arranged symmetrically about the longitudinal centerline of the mat partly at wider and partly at narrower pitch. At each edge of the mat a family of at least two longitudinal wires are provided at the narrower pitch.

Abstract: A construction apparatus for models, stagecraft, models of matrices and the like. Elements with locations at equal increments construct a mosaic of locations and points in a tetrahedron solid or portion thereof with each selected point in predetermined angular and linear relationship to every other selected point in the mosaic. A selected ratio in size constructs a scale model of a full-size structure with corresponding mosaics. Components rotate at any location. Adjustable elements select any point in relation to said mosaic. Any component is movable to any corresponding location in said mosaic. An integral connector may include two parts facing outwardly on opposite sides of a location. First part includes a resilient snap-ring in a retaining groove adjacent to a polygonal recess. The first part engages a second part with a polygonal protrusion at a location in a second element. The edges of said protrusion expand said snap-ring to engage the two parts in a predetermined orientation.

Abstract: There is disclosed a method of reinforcing a tubular duct using a longitudinally flexible reinforcing member built up from a plurality of combined layers having interstices therein and formed from steel wire or similar material. The method involves arraying the member circumferentially inside the duct, securing the member against the wall of the duct, and applying concrete to the covered walls.

Abstract: A beam for a fire-rated suspended ceiling structure wherein the beam has an inverted-T construction and includes a central web having a bulb at the top and a pair of oppositely disposed flanges at the bottom for supporting ceiling tiles, and an improved expansion relief section of the beam comprising a section of the web having a pair of spaced vertical cuts in the web and an horizontal cut extending between the upper ends of the vertical cuts to form a tab extending upwardly from the pair of flanges, the tab having an inverted triangular cut-out portion the apex thereof adjacent the pair of flanges and dividing the tab into two portions, a pair of protuberances formed in the upper edge of the tab portion contacting the upper portion of the web, and a section of the bulb having a crushed portion opposite the apex of the triangular cut-out portion, the crushed portion of the bulb having a substantially Z-shaped configuration whereby when the beam is subjected to expansion forces accompanying fire conditions th