Abstract: The present invention is a safety window cover for installing windows with sashes onto window openings. The safety window cover comprises a rectangular panel that defines a linear slit running parallel to the top side of the rectangular panel. A pressure pivot mechanism is mounted onto the linear slit. The pressure pivot mechanism is designed to slide along the linear slit. And, a lever is attached to the pressure pivot mechanism. The lever is designed to lock onto a window frame when the window is open, securing the rectangular panel outside the window frame during the installation process of the window frame onto a window opening.

Abstract: A flood barrier system includes vertical elements and panels extending between such vertical elements, the foregoing components having various features for inhibiting passage of flood water therethrough. One or more vertical elements may have a multi-layer base plate which forms a watertight seal with vertical gaskets disposed on the vertical elements. One of the vertical elements of the system may comprise a stanchion post which may be formed of extruded aluminum. Another vertical element which may find potential use in certain applications may be secured to a store front mullion. The panels in such system may include specially adapted gaskets to reduce instances of leakage. The vertical elements and panels allow the present flood barrier system to be flexible and readily deployable as a barrier to flood or flood risk.

Abstract: A main support frame is formed from sections of a plastic extrusion and has opposite side portions with peripheral recesses receiving an inner sash unit and outer sash unit each having a frame formed from sections of a plastic extrusion and supporting an insulated glass unit. Hinges support the dual sash units for pivotal movement between open and closed positions, and gear connected telescopic link members connect the main frame to the sash frames for simultaneous movement. A lock system includes a handle on the inner sash unit for moving straps with studs on the sash frames through a connector mechanism mounted on the main frame for simultaneously locking and releasing both sash units and for releasing only the inner sash unit. A screen and/or mini-blind may be supported between the sash units, and the window system with dual sash units may be constructed in various forms.

Abstract: A forward closure system includes a cylindrical frame. A pair of lune-shaped base sections are mounted to an inside surface of the frame. First and second opposed lune-shaped shell assemblies, each assembly including at least an outer shell section and an inner shell section, are rotatably mounted independently of each other at opposed ends along the rotation axis, the inner section and base sections of each shell assembly nested within the outer section when the forward closure system is in an open position, mating edges of the outer sections abutting one another when the forward closure system is in a closed position. An actuator is coupled to each outer shell section.

Abstract: A storm trim for holding a panel over a window for protection against impact of objects carried by wind during a storm. The storm trim includes a lineal cap and a lineal base. The base may be used with a window frame, incorporated into a window frame or be used in glazing surrounds or shutters. The base carries a stacked screw boss to receive and securely hold the anchoring screws that are needed to hold the panel over the window. The anchoring screws do not extend through the lineal base but remain within it. When the storm trim is not in use, the cap covers the lineal base.

Abstract: A metal shutter with improved air and light transmission is provided. The shutter comprises a metal top, a metal bottom, and two metal sides, which can be collectively assembled into a frame. The frame can have a metal support column that can be affixed to the top and bottom. A number of metal slats can be affixed between the sides of the shutter, and can either pass through the center column or can be affixed to the center column. A hinge can be affixed to the top of the frame, and can also be affixed to a structure. The top, bottom, sides, support column, slats, hinge, and a lock all comprise the shutter. The hinge allows the shutter to rotate between a first, substantially vertical, position, and a second, non-vertical position. The lock holds the shutter to a structure when the shutter is in the first position.

Abstract: A gate assembly is provided including frame means for positioning in an opening through which selective entry is required. Barrier means are mountable on the frame means via hinge means and the barrier means are movable relative to the frame means between a closed position, wherein the opening is closed, to an open position, wherein the opening is open. An automatic closure mechanism is provided for moving the barrier means from the open position to the closed position without user intervention. The automatic closure mechanism is associated with the hinge means and includes at least one ramp or inclined surface on which at least part of the gate travels when moving between the open and closed positions.

Abstract: A door positioning system is provided. The system includes a first member and a second member. The first member is attached to an exterior door at a first end of the first member and to an anchor location at a second end of the first member opposite the first end. The first member includes a locking region. The second member is configured to engage the locking region of the first member if the exterior door is opened a first threshold amount. The second member and locking region are configured to hold the exterior door in an open position if the second member is engaged with the locking region. The second member and locking region are configured to disengage if the exterior door is opened a second threshold amount beyond the first threshold amount. The exterior door is able to close with the force of the door closer if the second member is disengaged from the locking region.

Abstract: A removable security structure interposed between two window configurations is comprised of interconnecting horizontal and vertical members. The vertical members engage a gear junction of the horizontal members such that upon rotation of the vertical members, the horizontal members telescopically collapse. The reduction of length of each horizontal member disengages each horizontal member from a frame housing the window configurations. The rotation of the vertical members also frees the upper portion of the vertical members of the security structure. With the upper and side portions of the security structure freed, the security structure can be rotated and removed from the frame allowing egress.

Abstract: A storm and hurricane shutter quick release mechanism for permitting quick egress from a building that has storm shutters attached to the doors and windows to allow someone inside the building to leave the building quickly. The system includes a quick release housing mounted at the base of each shutter panel attached to the building that includes removable studs that are actuated by a cam mechanism from the inside of the building that release the attaching studs that hold the shutters in place from the quick release housing thereby releasing the shutter fasteners at the base allowing the shutters to be quickly removed by actuating the cam mechanism from inside the building.

Abstract: A strap to secure bolts at a proper spacing for installing a storm panel to a track using bolts and fasteners. The strap holds the bolts in place, allowing ease of storm panel installation. The storm panels are typically used to protect building openings, such as windows and doors, during periods of bad weather. The storm panels may also be used for security purposes.

Abstract: A storm reinforcing brace for a corrugated polycarbonate plastic hurricane shutter panel, and the combination thereof. The brace includes an elongated bar member extrusion-formed as a single one-piece unit and having a continuous, uniform generally hat-shaped section defining a central portion, leg or side portions, and mounting flange portions thereof. The central portion is preferably flat with an inwardly extending C-shaped channel sized to entrappingly slidably receive a head of a separate threaded fastener from either end of the channel, the threaded fastener being held in the channel in an outwardly extending adjustably slidable orientation along the length of the brace. Each of the mounting flange portions lie in a plane inwardly offset from the central portion and laterally extending from each corresponding leg portion, each of the mounting flange portions for receiving fasteners therethrough anchoring the brace against the upright side members of a window frame.

Abstract: A dual-swing breach training system is provided that includes a door having a removable strike plate therein and a removable means for adjustably securing the door and the doorframe in a coaxial position, that is readily removable to meet various training needs. A base for the system that does not obstruct access to the door during training is also provided.

Abstract: A fastener device for releasably securing an object within an opening formed in a structure comprises a first fastening member and a second fastening member each having a pair of legs which are oriented at an angle relative to one another. A coupling element is movable along one of the legs of at least one of the first and second fastening members. One leg of each fastening member is inserted into a hole formed in the structure surrounding the opening allowing the other leg to pivot, preferably in a trochoidal motion, until the pivoting legs align with one another at which time the coupling element may be moved into engagement with the two pivoting legs to releasably connect the fastening members together in position to secure the object relative to the opening.

Abstract: An energy saving grate system installed outside a building or structure in warm weather that reduces heating due to infrared radiation (IR) from sunlight. For a window application the grate acts as a sunshade to block or diffuse the IR and ultraviolet (UV) portions of sunlight while passing visible light. The grate cell size, depth, cell surface characteristics, and mounting details near the sash determine system performance of sunlight control, of the view through the grate, and of the exterior appearance. The grate is removable for cool weather. The grate system can cool various surfaces and requires no operating adjustments. It can be applied near most windows (including skylights) on all sides of a building where impinging sunlight causes unwanted heating. Compared to external solar thin mesh screens the grate system can provide more open area for a given performance in reduced IR heating.

Abstract: An improved method of installing a storm window in a prime window includes application of locking clips at predetermined locations around the frame of the prime window. The storm window is positioned over the prime window and swung into place, whereupon the storm window frame snaps and is locked into place by the clips. Bulb seals around the storm window frame compress between the storm window frame and the frame of the prime window to insure a complete and reliable seal against the elements and maximize sound abatement.

Abstract: A building structure having a high efficiency solar control system is provided. The building structure may have a window defined by a sheet of glass and a film mounted to its exterior side. There may be a gap between the film and the glass wherein the film, film and gap, or gap provides thermal insulation. The film may reflect solar radiation in the near and mid infrared ranges yet allow high transmission of light in the visible range such that the occupants of the building structure may view his/her surroundings through the window. The film may have a layer of silver which reflects the solar radiation in the near and mid infrared ranges. Since the silver is susceptible to oxidation and turns the silver into a black body which absorbs the near and mid infrared radiation, the film may be designed to slow the rate of oxidation of the silver layer to an acceptable level.

Abstract: A cover for closing an access opening that leads to an infrequently used space within a building, such as an attic, provides thermal and acoustic insulation at the access opening. The cover may be in one or two portions, including a closure alone or a closure and a frame having an aperture that can be closed by engagement between the closure and the frame. When the cover is used alone it engages a frame or a wall circumscribing the access opening. The cover is sized and shaped to close a stairwell, or the opening at one end of a stairway, or an opening in a generally vertical wall that is not necessarily associated with a stairway. The closure and frame are each made of one or more components.

Abstract: The present invention is a hollow core screen door with the screen opening in the upper half of the door. In several embodiments the door is constructed to fit in a standard interior doorway without modifying the existing doorway frame. In several embodiments the screen is constructed in a modular frame for easy replacement of the screen if damaged or if other material such a glass or plexiglass is desired in the screen opening. In several embodiments the modular screen frame can be replaced without tools.

Abstract: Edge stiffened corrugated polymeric sheet material can be utilized as storm panels for mounting about a perimeter surface of an opening so as to protect the opening from wind and impact loads. The panels can include a corrugated sheet material having a corrugated contiguous band horizontally extending at about an end of the top and the bottom, wherein the corrugated contiguous band is complementary and contiguous to the plurality of corrugations of the corrugated sheet panel. The complementary and contiguous corrugated band can be configured to sandwich the sheet material. The panel may also include, individually or in combination, a contiguous band sandwiching the polymeric sheet material at a terminal end of each side and extending vertically from the top to the bottom. The panels provide wind and impact load protection for the opening.

Abstract: A fastener device for releasably securing an object within an opening formed in a structure comprises a first fastening member and a second fastening member each having a pair of legs which are oriented at an angle relative to one another. A coupling element is movable along one of the legs of at least one of the first and second fastening members. One leg of each fastening member is inserted into a hole formed in the structure surrounding the opening allowing the other leg to pivot, preferably in a trochoidal motion, until the pivoting legs align with one another at which time the coupling element may be moved into engagement with the two pivoting legs to releasably connect the fastening members together in position to secure the object relative to the opening.

Abstract: A window assembly includes a main outer support frame supporting at least one movable rectangular sash frame enclosing an insulated glass panel. The sash frame is supported for vertical or horizontal movement between open and closed positions, and an interlocking system is effective to lock adjacent overlapping sash frame members. The interlocking system includes an angular metal clip member mounted on one sash frame member and having a flange projecting into a slot within the adjacent sash frame member. A pair of clip members are located under the tilt latches on single and double hung window assemblies and are secured to a vertical sash frame member on a horizontal sliding window assembly. The interlocking system responds to a substantial positive or negative wind load or such a wind load after an impact which breaks a glass panel, to limit deflection and prevent permanent deformation or release of the movable sash frame.

Abstract: A do-it-yourself non-permanent hurricane panel supporting and securing device designed to allow property owner selection and installation of a variety of readily available storm panel materials over glass doors and windows as a means of protection from hurricane winds and associated flying debris. The system provides a base plate device for supporting and securing the lower edge of plywood and other hurricane panel materials available following hurricane alerts or warnings. Readily available owner selected channels or tracks engage the upper edge of the panel materials. The system is designed to allow property owners of multi-level apartments and condominiums to install hurricane panels over glass doors and windows with provisions for the installer to complete the installation from inside the glass door or window being protected.

Abstract: A shutter assembly includes left and right shutter doors hingedly mounted between upper and lower horizontal frame members secured over an opening to be shuttered. Vertical stiles serve as the left and right frame members of each of the shutter doors. The vertical stile on the unhinged side of one of the shutter doors includes a vertical flange that engages and secures the vertical stile on the unhinged side of the other shutter door when both doors are closed and locked. The two vertical stiles framing each door retain left and right pivot strips to which a plurality of louvers are mounted for rotation. A louver tilt rod mechanism is attached to and hidden from view behind one of the vertical styles of each of the doors and operates to mechanically link the louvers for movement in concert. A wire rope is positioned longitudinally within each of the louvers to prevent a breach of the shutter assembly through attempted bending of the louvers.

Abstract: A method of controlling an operation of an induction actuated container cover includes the steps of (a) normally retaining a cover panel of the container cover in a closed position; (b) detecting a target movement of a user by a sensor; (c) generating a first actuating signal to an actuation unit when the sensor detects the target movement of the user; (d) generating an actuation output from the actuation unit to the cover panel of the container cover, wherein the actuation output contains a decelerating and torque enhancing force which moves the cover panel of the container cover at an opened position; (e) pivotally actuating the cover panel of the container cover at the opened position via the actuation output to expose a storage cavity, and (f) generating a second actuating signal to pivotally actuate the cover panel of the container cover back to the closed position.

Abstract: A fastener device for releasably securing an object within an opening formed in a structure comprises a first fastening member and a second fastening member each having a pair of legs which are oriented at an angle relative to one another. A coupling element is movable along one of the legs of at least one of the first and second fastening members. One leg of each fastening member is inserted into a hole formed in the structure surrounding the opening allowing the other leg to pivot, preferably in a trochoidal motion, until the pivoting legs align with one another at which time the coupling element may be moved into engagement with the two pivoting legs to releasably connect the fastening members together in position to secure the object relative to the opening.

Abstract: A sash window includes two window frames disposed in lateral juxtaposition and each including a head member, a sill member and a pair of jamb members connected together into a rectangular configuration, and a pair of upper and lower sashes supported within a respective one of the window frames. A sill nose is mounted to exterior sides of the sill members and extends continuously from an outer end of one sill member to an outer end of the other sill member. Each of the upper sashes is fixed to the respective one of the window frames by attachment members.

Abstract: A bar assembly includes hollow interior and exterior tubes. Each tube has an inner and an outer end. The tubes are of a length less than the distance between spaced vertical window jamb side surfaces. The bar assembly includes a rigid stopper. A stopper is press fit into the outer end of each tube. The bar assembly includes pins. A pin extends outwardly from each stopper. The bar assembly includes a coil spring. The coil spring is provided within the exterior tube. The coil spring has a first end. The first end is in contact with the stopper of the exterior tube. The coil spring has a second end. The second end is in contact with the inner end of the interior tube. The coil spring is adapted to be compressed to a loading orientation. The coil spring is further adapted to be expanded to an operational orientation.

Abstract: A reinforced door for an aircraft includes a frame and a network of harnesses. The frame includes components. The network of harnesses links a majority of the components and reinforces the frame. The harnesses are laid out onto the frame and linked to one another to form a webbing.

Abstract: Installation structure for installing and removing a sacrificial glazing panel. There is disclosed a removable retaining member for the sacrificial glazing panel that laterally pressures a primary glazing panel to seal and hold the primary glazing panel and holds the sacrificial glazing panel without lateral pressure. A unitary, dual-durometer retaining member is disclosed which is optimized for holding the primary glazing and the sacrificial glazing panel in different manners by having materials of two different hardnesses. Additionally, a retaining member is disclosed that has flocking material to reduce rattling of the sacrificial glazing panel.

Abstract: A flood barrier system for sealing an opening in a wall structure against the inflow of flood waters. The system comprises a plurality of elongated, horizontally disposed barrier elements of a length somewhat greater than the width of the opening. The barrier elements are stacked vertically, one upon the other against the outer face of the wall structure. End clamps engage opposite ends of the individual barrier elements to press them snugly against the outer surface of the wall, providing seals along the opposite vertical side edges of the opening. A simplified clamping mechanism is provided above the uppermost barrier element, with provisions to apply vertically downward clamping pressure on the uppermost barrier element, and thus upon the entire series of vertically stacked barrier elements.

Abstract: A pet barrier that is placed in a motor vehicle to divide a portion of the interior of the vehicle from the remainder of the interior of the vehicle. The barrier can be removed when not used but can be quickly set up when needed. The barrier includes a telescoping support pole that has screens attached thereto. When the support pole is placed in the vehicle, such as by frictionally engaging the ends of the pole against the interior sides of the vehicle, the screens will divide the compartment so a pet can be confined behind the screens.

Abstract: This is a storm window protection device which will fit over the window fame of a building and lock into position to prevent damage to the window during periods of inclement weather.

Abstract: A safety device for a motor vehicle having a door window defined by a retractable transparent panel which is guided into a receiving frame, the safety apparatus comprising a window insert formed of a sheet of material; a window frame including a transparent panel, the window frame having inside and outside surfaces; a lower mounting bracket for receiving the sheet, with an edge defined to be releasably inserted in the frame; an upper mounting bracket for receiving the sheet, the upper mounting bracket attached to the inside surface of the window frame.

Abstract: A safety device for an automobile. The safety device being a window insert designed to fit within the standard frame of a window and be retrained within the frame by the upper edge of the window insert, along with the window, fitting into the upper channel of the window frame and the bottom of the window insert fitting into and being retained by a bracket with the lower edge fitting between the window and the lower inside weather stripping of the window. The window insert can be installed in thirty seconds, requires no modification to the window, window frame, or door, and when in place the window may be raised or lowered at any time. The window insert may include orifices to allow air inflow and/or outflow so as to provide a continuous flow of fresh air into the vehicle. The safety device may be used to retain a child or a pet, and can be formed from a plastic, plexiglass, or polycarbonate material. Alternatively, the window insert may be formed from a high impact or bullet proof material.

Abstract: A window covering includes a frame including an upper wall and a lower wall, a first side wall and a second side wall. A window is mounted in the frame and has a length less than a length of the upper and lower walls. A guide assembly extends along a length of the frame. Each of a pair of panels is positioned in the guide assembly such that the panels are orientated substantially parallel to the window. The panels are selectively positioned in a closed position abutting each other in front of the window or in an open positioned spaced from each other.

Abstract: An interior storm or insulating window, kit for making, and system for utilizing, which window is adjustable in length and width so as to fit different sized window frames, and includes rails around the perimeter with a groove for attaching a retainer strip, the rail further including an engaging cavity to joining to other components, corner brackets for joining rails, a flexible plastic film and a retainer for retaining the flexible plastic film within the groove and for retaining the window within a window frame by use of a flexible spline.

Abstract: Concealed retaining channel for attaching upper edges of storm shutters in front of windows. The concealed retaining channel can be installed within a soffet portion of a roof overhang, and remains unseen with or without a storm shutter attached thereto. The concealed retaining channel can have a lower facing channel opening for receiving an upper edge of the storm shutter, and can be attached with removable fasteners to an exterior wall above the window being protected by the shutter and above the soffit portion of the roof overhang. A front portion of the concealed retaining channel can have a horizontal planar sleeve with an interior facing groove for receiving an upper leg of an elongated piece of trim, such as J-shaped decorative trim, so that only a portion of the decorative trim hangs down exposing a front facing groove.

Abstract: A vehicular rear window assembly for a vehicle comprises a first fixed pane, a second fixed pane, a sliding pane, which is supported for horizontal movement between open and closed positions, and a drive assembly. The slider window assembly includes a support system that supports the fixed panes in a manner to define a central opening. The support system further includes a carrier that supports the sliding pane for horizontal movement and, further, provides an enhanced engagement between the sliding pane and the drive assembly.

Abstract: Concealed retaining channel for attaching upper edges of storm shutters in front of windows. The concealed retaining channel can be installed within a soffet portion of a roof overhang, and remains unseen with or without a storm shutter attached thereto. The concealed retaining channel can have a lower facing channel opening for receiving an upper edge of the storm shutter, and can be attached with removable fasteners to an exterior wall above the window being protected by the shutter and above the soffit portion of the roof overhang. A front portion of the concealed retaining channel can have a horizontal planar sleeve with an interior facing groove for receiving an upper leg of an elongated piece of trim, such as J-shaped decorative trim, so that only a portion of the decorative trim hangs down exposing a front facing groove.

Abstract: The subject invention is directed toward a blind assembly having a pair of vertical elements. The vertical elements each have a top and bottom and a plurality of slots formed therein. An upper transverse element engages the tops of the vertical elements and a lower transverse element similarly engages the bottoms of the vertical elements. A plurality of slabs engage the slots of the vertical elements and extend substantially parallel with the upper and lower transverse elements. A mounting arrangement interlocks the upper transverse element to the tops of the vertical elements, the lower transverse element to the bottoms of the vertical elements, and the slabs to the vertical elements for eliminating the need to weld the blind assembly.

Abstract: A flood protection barrier is disclosed that can be deployed in the event of an immanent flood risk. The barrier comprises a shield having a sealing element and securing means for securing the shield in place to at least partially close an aperture in a wall of a building. The sealing element forms a fluid-resistant seal between barrier and the periphery of the aperture thereby resisting passage of water through the aperture. The barrier can be secured by securing means that require no modification to the building. The securing means may include clip assemblies or, in alternative embodiments, wedges or other suitable components.

Abstract: A shutter system for a recreational vehicle is mounted on upper and lower rails on an outside of a side wall of the recreational vehicle adjacent the side windows of the vehicle. The shutter system includes a pair of shutters which are moveable on the upper and lower rails and a warm air supply. The warm air supply blows warm air over the outside surface of the window to defrost or defog the windows.

Abstract: A two portion frame for an opening (10) comprises a fixed frame portion (12), which is secured about the opening (10); a removable frame portion (22), which is hinged to the fixed frame portion (12) by hinges (30) and locks (36) by which the removable frame portion (22) is fixable to the fixed portion (12), so that the removable frame portion is removable only from one side of the frame. A door (32) is hinged to the removable frame portion (22) by hinges (34) so that it opens towards the other side. One or more locks are, provided to lock the door (32) with the removable frame portion (22) and one or more locks are provided to lock the removable frame portion (22) with the fixed frame portion (12).

Abstract: A storm cover for protecting a building's exterior glass includes a resiliently rigid protective storm panel connected directly to the glass so as to substantially cover the glass surface. The protective storm panel is connected to the glass by shock absorbing connectors positioned to hold the panel on the glass and spaced apart therefrom, to substantially protect the glass from impact by distributing the force of an impact. The protective storm panel is made of a substantially resiliently rigid material such as wood, plastic, or light gauge metal, and the exterior glass is preferably a glass window or glass door. The protective storm panel may be sized so as to overlap a frame surrounding the window or door to thereby provide added protection.

Abstract: Telescoping hurricane shutters protect a window during a storm but eliminate the need for pre-sized storm shutters. The interchangeable storm shutters are made up of individual panels slidably connected to one another. The panels may be extended to cover an exposed area of window. The storm shutters may be interlocked together in order to fit a particular window and may be held in place by brackets, quick tapping screws, or threaded rods and nuts that allow for quick installation and removal.

Abstract: This system is comprised of an insulated access door (6), which makes for the closure of the cold room (4) in coming into contact with the door frame (1) fixed onto the entrance (2) of said cold room (4), and a quick opening door made up of a moveable sheet (8) and the corresponding means of activation (9, 10). These means of activation are to be fixed to the exterior of the cold room (4). There is also a longitudinal slit (7) fixed onto the door frame (1) so that the sheet (8) can pass, this sheet (8) being able to effect the closure either in front of or behind the insulated door (6). The system includes a stopper device (7) which can close the slit (7) in order to minimize the temperature loss through same, and some means (71 and 161) of heating the slit (7) and some guides (16) on which the sheet (8) moves to its open or closed position.

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

Abstract: A brace for protecting windows and buildings during a high wind storm is disclosed. The brace includes a rigid member sized so as to fit within a window frame containing the window to be protected, and double-sided tape affixed to one side of the rigid member for affixing the rigid member to the window to be protected. Various method for imparting a force to the brace to cause it to become firmly wedged within the window frame of the window and building to be protected are also disclosed, and include the use of the installer's hands, the use of a hinged member rotatably connected to the brace which is capable of being wedged against the window frame, the use of a swing arm connected to the brace which can be firmly wedged against the window frame, and the use of a ratchet to advance a dampening member from within the brace to firmly engage the window frame. Methods of using the disclosed brace are also disclosed.

Abstract: A hurricane protection system comprises a rigid sheet in a rectangular configuration positioned within a window opening with an upper edge, a lower edge, and parallel side edges. A plurality of fixed retention mechanisms are secured to the sheet adjacent to the lower edge. Each fixed retention mechanism has a plate secured to the sheet and a downwardly extending finger with a lower end positioned in an associated hole and an upper end secured to the plate. A plurality of supplemental retention mechanisms are secured to the sheet adjacent to the upper and side edges. Each of the supplemental retention mechanisms include a J-shaped finger with a short leg and a long leg terminating in a free end reciprocal between a locked orientation within an associated hole and unlocked orientation out of, but aligned with, an associated hole. Each of the supplemental retention mechanisms include a bracket with a central face attached to the sheet.