Abstract: A landscaping tile for stabilizing hillsides that includes a top surface which is textured to simulate a bed of gravel, river rocks, or the like. The landscaping tile is flexible and conforms to the topography of the land. The landscaping tile is secured to the ground using a plurality of stakes. The stakes may be driven through preformed holes defined directly in the tile, or through a border frame which overlaps the tile.

Abstract: A bordering system comprises blocks of plastic, masonry or other materials which couple end to end to create an aesthetically pleasing boundary or wall in front of flower beds, fish ponds, property boundaries and the like. The blocks have sufficient thickness such that they stand upright without external bracing. A cylindrical post integral with one end of each block mates with a corresponding scallop on the opposite end of the adjacent block to link adjacent blocks and maintain stability. The blocks may be pivoted relative to each other to almost any angle either side of their common centerline, so the border maintains its interlocking and aesthetic appeal around curves and corners. For inside corners, a specialized filler block assures proper interlocking.

Abstract: A stackable landscape edging segment is disclosed that can be stacked to form multi-layer landscape edging. The landscape edging segment has an elongated body. A lower stacking connection feature and an upper stacking connection feature are coupled to the elongated body. The upper stacking connection feature is formed to connect to a matching landscape edging segment by engaging with a matching lower stacking connection feature. In one embodiment, the stackable landscape edging segment comprises a plurality of spikes connected to and extending downward from the elongated body. And, each spike includes a lower stacking connection feature. In this embodiment, the stackable landscape edging segment also comprises a plurality of upper stacking connection features, each associated with and aligned with one of the spikes. Further disclosed are methods of manufacturing and using the stackable landscape edging segments.

Abstract: A landscaping timber system includes a molded plastic landscaping timber having ends configured to link with ends of other such timbers via elongate spikes inserted through aligned apertures in the ends of the timbers and driven into the ground. The timber includes an integral storage compartment for storing a spike therein during storage or shipping of the timber. The timber can also include one or more weep vents in the bottom surface of the timber to allow water to flow under the timber. The system also includes a flush-mount adapter for attachment to a stepped end of a timber to give an appearance of a non-stepped end so that the timber can be mounted flush against a wall. The system further includes a ramp assembly for providing access to an area bounded by the timbers, and an end adapter enabling a timber to be cut to a desired length and attached to the adapter so as to provide a custom-length timber.

Abstract: The present invention relates to a masonry lawn edging block assembly for a multi-grade landscape setting where the ground level of the lawn is lower than the adjacent areas. The assembly includes a plurality of like-shaped straight blocks, outside cornering blocks and like-shaped inside cornering blocks that create a border between the lawn and the adjacent area. The present invention has an L-shaped cross section that includes a vertically extending wall portion and a horizontally extending base portion. Dowels are used to connect adjacent blocks. A series of like-shaped blocks are connected in an end-to-end, end-to-side and end-to-rear arrangements to form the border. The base of each block includes a platform, and these platforms form a continuous deck upon which a conventional lawnmower can travel to cut the grass along the edging block assembly in an even manner and to the same desired height as the rest of the lawn.

Abstract: The present invention relates to a retaining wall block that is resistant to damage and wear caused by the environment it is placed into. The deterioration resistant block is generally a hollowed frame or shell of a deterioration resistant material that is lightweight and is configured to accept and retain any type of filling material. The filling material provides weight and stability to the retaining wall block and also provides weight, stability and security to a retaining wall constructed of such blocks.

Abstract: A pavement restraint structure includes edging pieces having apertures. Connecting elements have protrusions that are secured in the edging aperatures such that adjacent edging pieces have a gap therebetween. Anchoring elements are received by slotted apertures in the edging pieces. Thus, the arrangement enables movement, such as contraction and expansion of the edging pieces along a length thereof. Such movement prevents damage to, or improper shifting of the pavement restraint structure with respect to the pavement due to large changes in temperature of the structure.

Abstract: A mound-like tree skirt has a generally dome-shaped body and is designed for placement around a tree. The body has an apex with an approximately centered opening to accommodate the tree's trunk. It also has a peripheral edge with a substantially horizontal anchor lip extending circumferentially therefrom. A radial slit extending from the approximately centered opening to the peripheral edge allows the mound-like tree skirt to be slipped around a tree until the tree's trunk is in the centered opening. At least one hole in the anchor lip and a corresponding number of anchor stakes hold the tree skirt in position.

Abstract: The present invention concerns a manufactured article impervious to water, the water being rain water, water coming from a water-bearing stratum, and/or from concrete. The manufactured article of the invention may be used in building of habitations, factories, tunnels, and/or submarine structures and the like, the article comprising a leakproofing material. The manufactured article further includes a coating constituted by a film made of a material, the water-solubility of which is kept under control, the film delaying the leakproofing material hydration process for a predetermined period of time from between 1 and 30 days.

Abstract: A lawn and garden edging system for edging a lawn with interconnected pieces which can be lengthened and shortened. The lawn and garden edging system includes a first strip for inserting into a ground surface and a second strip for inserting into the first strip. The first strip is elongate and has a top side, a front side, a back side, a bottom side and two ends. A plurality of bores are located in the top side of the first strip. A plurality of first spikes for inserting into the ground surface are coupled to the bottom side of the first strip. The second strip is elongate. The second strip has a cross-section traverse to a longitudinal axis of the second strip has a generally L shape. The second strip has a short wall and long wall. A plurality of second spikes for insertion into the bores in the top wall of the first strip are coupled to and extend away from the short wall of the second strip. The spikes are oriented generally perpendicular to a plane of the long wall of the second strip.

Abstract: The present invention is a modular landscape apparatus including a plurality of brackets. The brackets are used with conventional landscaping timbers secured thereto. The brackets includes different embodiments to provide the user with a variety of options for forming any desired shaped border in a landscape design. The brackets include a pivotal mechanism which enables the option of transforming the bracket to any desired angle and for ultimately forming any desired boarder pattern.

Abstract: A prefabricated staircase module (10, 11) comprises a first step and a second step, each step (14) having a tread member (13) and a riser member (15). The staircase module further has fixing means (31) for fixing the module to a sloping surface on which it is laid. The steps in a module may be connected to each other by a rigid or flexible bridging member (19), and the tread member (13) may be curved. Different designs and configurations of the prefabricated modules may be combined into a staircase assembly, the modules which can be chosen according to the gradient of the underlying surface on which the staircase is to be constructed.

Abstract: A first hollow block is placed over or next to a second hollow block. Both blocks are filled with soil so that the roots of plants that are planted in the blocks are permitted to grow through openings of the blocks to interconnect the blocks, the roots and the existing ground.

Abstract: A bumper for limiting the limiting the mobility of a wheeled device. The bumper is an elongated member having a base wall and an elastically resilient wheel engagement wall coupled to the base wall. The wheel engagement wall includes an outer surface and an inner surface, one of which includes reliefs for aiding the wall to conform to and stop the rolling action of a wheel of a wheeled device when impacted thereby. The energy stored in the engagement wall when impacted by the wheel of the wheeled device returns the engagement wall to its original shape thereby pushing the wheel of the wheeled device away from the elongated member. A bumper system may be fabricated by connecting two or more of the bumpers together in a desired configuration using adjustable, straight, or bent connectors.

Abstract: A block for landscaping purposes. The landscaping block has one generally planar surface and another corresponding generally parallel planar surface, which further defines a protrusion and a cavity conformed to receive another protrusion of the same dimension in a male/female relationship with the planar surfaces of the block in close proximity and parallel to each other. Two or more of the landscaping blocks may best be joined together by inserting the protrusion of one block into the conformed cavity of the next block. A series of blocks may be joined together either in an extended line, or in a shape which reaches closure, with all of the blocks interlocked.

Abstract: An ice skating rink structure comprising a plurality of boards and a plurality of brackets is provided. Each of the brackets has a U-shaped support for holding one or more of the boards and has at least one downward projection for insertion into the ground. The downward projection of the bracket is inserted into the ground and boards are placed within the U-shaped support such that the boards define the shape of an ice skating rink. A liner is placed inside of the ice skating rink and water is poured onto the liner and allowed to freeze and form an ice skating rink. By using boards with different heights, the present invention allows for the quick assembly of an ice skating rink on level or unlevel ground.

Abstract: A landscape edging system and corresponding components and methods are disclosed. The system comprises an edging member having a top rail and a barrier extending downwardly therefrom, and corresponding interconnecting or adjoining blocks, each block having at least one block attachment member disposed on the bottom surface thereof for receiving top rail therewithin. The blocks, in combination with the edging member, may be employed to separate adjoining lawn, garden, walkway, driveway or other areas from one another. The present invention permits the effects of undesired displacement forces acting on the blocks, such as frost heave, to be reduced or minimized.

Abstract: An elongate ground gutter device designed to be substantially recessed in the ground with the central trough section thereof open above ground. The gutter device is designed to communicate with the downspout of a roof gutter to receive rain water into the trough section and transport it a distance away from the building. The gutter device comprises a trough section having vertical walls terminating in upper reinforcement sections which are supported on the ground surface, and a pair of lower horizontal flanges which are buried below ground, parallel to and underlying the reinforcement sections.

Abstract: A support bracket and stake are provided which can be used for edging gardens and lawns or for the formation of retaining walls. Used together, the bracket and stake provide a means to support and anchor lengths of lumber to the ground to create a variety of edging systems. In particular, the stakes provide a means to attach the system securely to the ground surface, while the support bracket has a beam receiving portion to support a variety of different types of lumber frequently used in edging. A mounting column on the support bracket provides a means to secure the support bracket to the stakes such that the support bracket may freely rotate 360° perpendicular to the vertical axis of the stake. The stakes may be vertically engaged one upon and inside the other to provide a raised border system of various height.

Abstract: A paving block system and corresponding components and methods are disclosed. The system finds particularly efficacious application in forming patios, walkways and driveways, and may comprise interconnecting or adjoining bottom barriers and side barriers. Each bottom barrier receives one or more paving blocks thereon, and may optionally have formed in the bottom surface thereof a recess for receiving a top rail formed into bottom barrier. In preferred embodiments of the present invention, adjoining blocks interconnect to form a relatively continuous paving block top surface.

Abstract: A landscaping structure system for building landscaping structures on property to decorate around buildings and the like. The landscaping structure system includes a number of timber elements formed from plastic or the like that are interconnectable to for a desired structure. Some of the timber members include structural cavities and channels for the installation of landscaping elements such as sprinkler systems and ornamental lighting systems.

Abstract: The instant invention is a lawn and garden edging system which provides for a border device positionable adjacent walks and plant beds with provisions for the attachment of watering and lighting components. An insertion structure is provided which is inserted into the ground by use of a wooden handle placed into an aperture allowing an individual to stand on an upper end of the structure allowing the installer's weight to force the structure into the ground. The upper portion of the structure forms a passageway with apertures available for positioning watering components, electrical components may also be attached for connection to lighting products used to highlight trees, bushes or a home. A second embodiment of the invention provides a conduit for attachment to conventional extruded plastic edging dividers, the conduit provides the formation of a passageway for placement of the aforementioned watering components and electrical connections.

Abstract: A well cover includes a housing having a top side and a substantially concave bottom side, and a peripheral base portion. A substantially radially outwardly extending flange is disposed on the peripheral base portion for securing the well cover to the ground. Alternatively, a plurality of tabs may be provided for securing the well cover to the ground. The flange or tabs may be provided with holes or slots therethrough. Attachment anchors cooperate with the flange or tabs to releasably secure the well cover to the ground. A method of forming the well cover includes vacuum molding a sheet of vacuum-moldable material into a desired contour. The flange or tabs are formed integrally with the housing.

Abstract: An apparatus and method of lighted ground curbing, flatwork and other structures having a recessed channel formed therein for receiving a length of flexible sheathed lighting. The separately sheathed lighting is adequately protected independent of the curbing, flatwork or other structure, and is powered by a power source residing separately and independently of the curbing, to thereby eliminate any need for electrical sockets or protective covering to be included as part of the curbing or flatwork portion. The lighting operates to project a substantially continuous stream of light extending continuously along the recess formed in the curbing, flatwork or other structure.

Abstract: An edging system for use in landscaping is provided. The edging system consists of a number of modular elements, each of which has a hollow body with two side walls, a base, a first end wall, and a second end wall. The base of the body is substantially planar for resting on a landscape. An integral male connector is attached to the first end wall of the body. The integral male connector includes an anchor portion extending below the base of the body to facilitate insertion and anchoring in the landscape. An integral female connector is attached to the second end wall of the body. The integral female connector is adapted to receive the integral male connector of another contiguous modular element.

Abstract: A pavement edging for maintaining the integrity and straight longitudinal edge of a concrete pavement constructed from a plurality of concrete bricks. The pavement edging having an elongated body with a front wall, a rear wall and a plurality of interposed longitudinal and transverse walls forming a generally egg crate construction.

Abstract: A weed control apron block (10) laid on the boundary of a sidewalk. A step portion (113) is provided on the sidewalk-side upper end edge (111) of the weed control apron block (10). A member having a high thermal conductivity, e.g. an iron plate (20), is installed in the step portion (113). The iron plate (20) is a flat plate member extending over the entire longitudinal length of the step portion (113). A heating wire may be installed in the step portion (113).

Abstract: An edging member is provided. The edging member includes generally planar first and second elements and means for pivotally joining the edging member to an adjacent edging member. The first and second elements are generally transversely joined to each other. The first element is vertically oriented and the second element is horizontally oriented with the edging member is installed. A generally circular segment may be present to cover the ground below the edging member when the edging member is angularly joined to an adjacent edging member.

Abstract: A skirt guard for a mobile home skirt having a skirt track on the ground. The skirt guard comprises an elongated protective panel. A structure is for retaining the elongated protective panel to the skirt track in front of the skirt. The elongated protective panel will cover a lower portion of the skirt and the skirt track, to protect against the damaging effects of a string grass trimmer that trims the grass.

Abstract: An elongated holding device for holding paving blocks in place. The device has a pair of longitudinally spaced ends, an elongated vertical plate having a front paving block contacting face to define a border for a paved area, and a rear surface. The device also includes a plurality of discrete, elongated footing elements which are attached to a lower portion of the rear surface of the plate. The footing elements are spaced apart longitudinally of the plate and extend rearwardly therefrom. A first connector structure which includes an elongated, longitudinally extending tab is located at one end of the device. The footing elements each including a respective second connector structure in the form of a tab receiving opening. Each of the tab receiving openings is configured to receive and mate with the tab of the first connector element to thereby form a secure connection therebetween.

Abstract: A rodent barrier device for use on the ground engaging tires of a vehicle. A continuous wall barrier made of a weather resistant and low outer friction slippery material, such as the slippery plastic LEXAN material, having an upper concave surface rim encircles the tires of the vehicle to be protected from the rodents. Initially before made into a continuous wall, the material making up the wall barrier may be a single elongated flat strip that is processed and bent into a continuous tire encircling wall by having the two opposite ends of the strip meet at a common edge.

Abstract: A bumper for limiting the limiting the mobility of a wheeled device. The bumper is an elongated member having a base wall and an elastically resilient wheel engagement wall coupled to the base wall. The wheel engagement wall includes an outer surface and an inner surface, one of which includes reliefs for aiding the wall to conform to and stop the rolling action of a wheel of a wheeled device when impacted thereby. The energy stored in the engagement wall when impacted by the wheel of the wheeled device returns the engagement wall to its original shape thereby pushing the wheel of the wheeled device away from the elongated member. A bumper system may be fabricated by connecting two or more of the bumpers together in a desired configuration using adjustable, straight, or bent connectors.

Abstract: A restraint edging system for a segmented paving surface, including a vertical strip component for surrounding the boundary of the segmented paved surface, and a support member component. The vertical strip component has one or more parallel protruding ribs running the length of the vertical strip component which mate to recesses in the support component. The support component also serves to connect vertical strip portions.

Abstract: The present invention provides an edging strip with integrally molded stakes. The strip of the invention is a single, integrally molded piece, greatly simplifying construction, packaging, shipping, and assembly by the end user. Each strip will present an independent and usable item containing within the one piece the components necessary to position and attach the strip within the ground and to link it with other strips as desired. The integral stakes each also have broad top surfaces which provide a hammering surface for inserting the strip within the ground. The strip uses interlocking semi-stakes at its end points to connect with other strips, providing a full hammering surface when interlocked and providing anchoring points at the points of connection. The disclosed invention may also include support ribs with catches or ledges which act to resist the effects of frost heave and reduce unintentional removal of the strip from the ground.

Abstract: A one piece steel device is provided to hold landscape lumber, such as railroad timbers and the like, in fixed proper relationship. The body is triangular in shape, to be driven into the ground by the point of the triangle. The opposite end extends in two flanges which are separated by a support shelf. The support shelf and the center line of the triangular body may be bent through any angle, the support shelf preferably comprising two pieces meeting at the center line extending outwardly from the base of the triangular portion. The triangular body is driven into earth, after bending the article along its center line to the angle two adjacent pieces are desired to be held at. Each timber piece is secured to one of the flanges by driving retaining members through holes provided in the flanges in or through the lumber.

Abstract: A trenchless landscape edging system and corresponding components and methods are disclosed. The system includes a plurality of anchoring members, an edging member having no or substantially no barrier extending downwardly therefrom and corresponding interconnecting or adjoining blocks having recesses disposed therein. The blocks, in combination with the anchoring members and the edging member, may be employed to separate adjoining lawn, garden, walkway, driveway or other areas from one another. The present invention permits the effects of undesired displacement forces acting on the blocks, such as frost heave, to be reduced or minimized and further permits rapid installation of the system since no trench for receiving lawn edging need be excavated.

Abstract: Lawn edging is made in discrete, rigid one foot sections each with an integral water conduit with sprinkling orifices, each section having an integral male fitting at one end and a female fitting at the other. The two fittings are oriented in a vertical direction and define a pivot axis for adjacent edging sections. The conduit is generally trapezoidal in shape and has a flat upper surface which serves as a force-receiving surface. A special section has a hose attachment to permit distribution of water in one or both directions from the special section. A bottom section is divided into subsections with each section having insertion facilitating elements including v-shaped points and a sharpened leading edge and removal inhibiting elements including teeth formed on a v-shaped tangential flange.

Abstract: The lawn border and edging member of this invention has an elongated vertical wall member which has opposite vertical side surfaces, first and second opposite ends, and elongated top and bottom surfaces. A flat plate member is secured to the bottom surface of the wall member and has a width extending outwardly from each side of the wall member to maintain the wall member in a vertical position. The outer ends of the plate member extend longitudinally outwardly beyond each end of the wall member. The plate member has an offset portion on its bottom surface to receive an end extension portion of another juxtapositioned member having an end extension portion and an elongated horizontal slot to receive an end extension portion of another juxtapositioned member having an end extension portion. The wall member has connecting means on its opposite ends for pivotal attachment to the ends of similar wall members.

Abstract: A landscape timber connecting system for use with landscape timber or the like includes first and second interlocking members. The first and second members each have a bracket shaped to engage an end of a first landscape timber, and in a preferred embodiment, a hinge component. The hinge components are adapted to align with each other and form a channel along a common, substantially vertical pivot axis. A hinge pin shaped to be inserted in the channel along the common pivot axis and extend downwardly into ground beneath the system such that the first and second members can be pivotally positioned relative to each other about the common pivot axis to position associated engaged landscape timbers at a selected angle relative to each other, and the hinge pin anchors and fixes the system to the ground. In an alternate embodiment, the members slidably engage to form a straight, non-pivoting joint.

Abstract: A swimming pool has a plurality of substantially vertical side walls, with each side wall having a top. A coping is attached to the top of a side wall of the pool and has a curved facia. A signage platform is attached to the facia of the coping. The signage platform has a substantially vertical display wall and an adjoining substantially horizontal display wall. Visual indicia are located on each of the vertical display wall and the horizontal display wall.

Abstract: A landscape timber connecting system for use with landscape timber or the like, and includes a first member and a second member. The first member having a bracket that is shaped to engage an end of a first landscape timber, and a first hinge component. The second member having a bracket that is shaped to receive an end of a second landscape timber, and a second hinge component. The second hinge component is adapted to align with the first hinge component along a common, substantially vertical pivot axis. A hinge pin is shaped to engage the first and second hinge components along the common pivot axis and extend downwardly into ground beneath the system such that the first and second members can be pivotally positioned relative to each other about the common pivot axis to position associated engaged landscape timbers at a selected angle relative to each other, and the hinge pin anchors and fixes the system to the ground.

Abstract: A border unit comprising a front panel (3) and a foot (4, 5) which when standing on a flat horizontal base surface supports the front panel (3) vertically with the bottom edge of the front panel (3) extending along the base surface. The unit (20) has end surfaces (21, 22) which are adapted to support each other around at least part of the cross section periferi of coaxially joined unit (20). Each unit (20) has at one end (22) a vertical rod (7) and at the other end (21) a recess which receives the rod (7) of an adjoining unit (20), to form a coupling (7, 11) for joining units. The coupling is located in a central part of the unit cross section; the end surfaces of the unit has a straight generatrice which is parallel to the rod and vertical when the unit stands on a horizontal base surface.

Abstract: The instant invention is a lawn and garden edging system which provides for a border device positionable adjacent walks and plant beds with provisions for the attachment of watering and lighting components. An insertion structure is provided which is inserted into the ground by use of a wooden handle placed into an aperture allowing an individual to stand on an upper end of the structure allowing the installer's weight to force the structure into the ground. The upper portion of the structure forms a passageway with apertures available for positioning watering components, electrical components may also be attached for connection to lighting products used to highlight trees, bushes or a home. A second embodiment of the invention provides a conduit for attachment to conventional extruded plastic edging dividers, the conduit provides the formation of a passageway for placement of the aforementioned watering components and electrical connections.

Abstract: A combination of a rectangular-shaped landscape tie held in position by a heavy U-shaped member wherein said U-shaped member surrounds three sides of the tie with long pointed arms extending into the ground with the U-shaped member having sufficient strength to withstand driving into the ground by hammering on the top of the U-shaped member.

Abstract: A lawn edging secured to the ground includes a trough having a pair of spaced apart first upright sides. A major portion of each of the first upright sides is in face-to-face abutment with at least one of the ground and a structure. The trough is secured to the ground, and interposed between an adjacent lawn and an adjacent structure. An insert has a pair of spaced apart second upright sides where at least one of the second upright sides has a height greater than the height of at least one of the first upright sides. The second upright sides are detachably insertable between the first upright sides of the trough such that at least one of the first upright sides extends above at least one of the second upright sides so that the insert can be detached from the trough to enable the lawn adjacent the trough to be mowed.

Abstract: A device for building a berm to contain a leak or spill has a plurality of corner members each having an elongated member spaced there between. The elongated members are formed from a pliable strip having a vinyl housing and being filled with a foam material having shape retention properties. The elongated members are sized and cut at the workplace to form a berm of sufficient size to meet the present spill containment problem. Once the side members and corner members have been selected and arranged, they are secured to the building floor by a caulking compound. Strapping material can then be applied, if necessary, to seal the joints between the corner members and the side members of the berm.

Abstract: The ground engaging restraint device (2) comprises a ground spike (4) and a clasp (6). Comprising the clasp is a head (48), a pin (50) and a pair of arms (52) having teeth (64). The ground spike has a receiver (12) having a bore (20) and circumferential notches (24), an elongated shaft (16) having a ground-engaging stop (18). In one embodiment the shaft has a plurality of interconnected webs (36), and in another embodiment the shaft has a helical blade (72) fixed concentrically about the shaft. A portion of an article (14) is placed over and inserted into the bore by placing the clasp over the receiver, causing the pin to enter the bore and frictionally engage the article between the pin and the bore. Teeth of a pair of arms engage a plurality of notches (24) on the receiver, removably retaining the clasp on the receiver.

Abstract: A new Plastic Timber Landscaping System for providing an efficient landscaping tool which has the appearance of natural wood but does not rot or discolor from the elements, and of which is constructed from a staggered formation increasing strength and stability of the structure. The inventive device includes a plurality of elongated hollow rectangular members constructed from plastic including a plurality of knockout passages near the ends of said elongated hollow rectangular members, where the knockout passages align to corresponding knockout passages of other elongated hollow rectangular members where a joiner pipe projects through the corresponding knockout passages providing a strong, staggered, orthogonal connection of at least two elongated hollow rectangular members, and where the elongated hollow rectangular members include arcuate wood grain sides and a planar wood grain top simulating the appearance of natural wood.

Abstract: The invention includes a block for use in landscaping and other applications. The block may have a lip on one or both sides that may function as a mowing strip. The block may have grooves on the bottom for receiving an anchoring strip or defining a conduit. Also, one or both ends of the block may be angled to create a straight, curved, or curvilinear border.

Abstract: An edging system for separating grass of a lawn from landscaping features thereof. The inventive device includes a plurality of linear members and a plurality of corner members which can be interconnected into a desired orientation. The members each include a vertical plate positionable into the lawn, and a horizontal plate projecting from an interior of the vertical plate which limits insertion of the vertical plate and maintains the same in a vertical orientation.