Abstract: An adjustable shelving apparatus including at least one shelving member and at least one upright frame member wherein the shelving member can be mounted to the frame member in each of a horizontal and a vertical position, the frame member forming a coupler assembly and the shelving member also forming a coupler assembly wherein the shelving member has a rear surface and at least one end surface, an end extending member extending laterally from the end surface and a rear portion of the shelf adjacent the rear surface forming another portion of the shelving member coupler assembly. The disclosure also includes a supportable member for use with the vertically mounted shelving member, the shelving member having a thickness between top and bottom oppositely facing surfaces and the supportable member having a bracket that receives the shelving member edge there by supporting a portion of the supportable member adjacent the shelving member edge.

Abstract: A modular shelving system includes structural shelving components and connector shelving components for joining the structural shelving components together in a variety of configurations. Each structural shelving component has a face surface and elongated edge surfaces. A plurality of apertures are formed extending along the edge surfaces of the structural shelving component. A center-to-center distance between adjacent apertures is X. A distance between the centers of the apertures and the face surface is X/2. A distance between an end one of the apertures and an end of the edge surface is X/2. Each connector shelving component has a plurality of projections extending therefrom. A center-to-center distance between adjacent projections is X.

Abstract: An apparatus for supporting an item in a refrigerator housing has a frame having rails arranged for the items. A plurality of slotted strips and/or a drawer slide guide are mounted to the housing. A plurality of brackets are provided for engaging the slotted strips and/or drawer slide guide supporting the frame.

Abstract: A shelving system includes a plurality of shelves each having spaced front and rear hooks projecting from each side edge, each rear hook being spaced forwardly from the rear edge of the shelf, and a support framework for adjustably supporting the shelves at spaced intervals. The framework has a pair of support posts located on each side of the shelves, each pair of support posts comprising a front support post located adjacent the front hooks of the shelves and a rear support post located adjacent the rear hooks of the shelves. Each support post has a series of vertically spaced openings for receiving the shelf hooks. The posts are positioned so they are much less vulnerable to damage, and can be made out of light material with an open configuration. Brackets attach to the shelf to allow the easy addition of useful accessories to the standard shelf.

Abstract: A product inventory control system is provided that utilizes both fixed and movable racks. The present system may be utilized in a walk-in display cooler or other product storage application to help with inventory management and to provide easy access to stored product. The racks of the present system include shelf support members that are selectively positionable at a plurality of different orientations so as to achieve different product support surface orientations relative to a horizontal The shelf support members are adapted for storing a plurality of different types of products and product containers. Movable racks are positioned in front of fixed racks whereby movement of a movable rack provides access to a rack positioned therebehind.

Abstract: A shelving case assembly (10) includes two or more rows of shelving cases (12), certain of which are movable to enable access to both front row cases and those behind for storing or retrieving information modules (14). Movable cases include rollers (38) on a bottom panel that have constrained movement along a pedestal channel (42) and upper guide means (44) maintaining upright relation to immovable cases (32). A cover plate (76) is held securely in place on a floor surface by a pedestal (40).

Abstract: A mounting system is provided for adjustably mounting supporting surfaces in the form of shelves and the like at various relative heights. A plurality of uprights, having indentations therein, are arranged to support respective expandable clamping assemblies thereon. The clamping assemblies include respective indentations along respective inner surfaces thereof for alignment with the indentations of the uprights such that a retainer member can be received between the respective indentations for supporting the clamping assemblies on their respective uprights. The retainer members are spring wires which are biased outwardly to expand the clamping assemblies and release the retainer members from the respective uprights. A plurality of clamping assembly housings are provided for securing the respective clamping assemblies on the uprights in an engaged position.

Abstract: A shelving system is provided wherein the shelves can be engaged by support members at a plurality of angles relative to the horizontal.

Abstract: A shelving system, shelf support and shelf are disclosed that are adjustable vertically, horizontally and angularly for better product presentation and maintenance. Brackets are disclosed which allow depth or horizontal adjustment and another bracket is disclosed which gives shelf support and allows easier horizontal adjustment. The brackets also permit easier and more reliable vertical and shelf angle adjustments for better product presentation. Shelf assemblies are disclosed which include adjustable product stops and dividers. Other shelf and product presentation features are also disclosed.

Abstract: A rack merchandising system comprising a movable pallet base having openings to receive lifting forks, and a central support structure, the central support structure perpendicularly attached to the moveable pallet base and having two vertically extending sides. The central support structure may also comprise at least one transverse support member extending between the two vertically extending sides. The system further has at least two vertical upright supports that are spaced apart from each other and are located at or near a peripheral edge of a top surface of the movable pallet base, each vertically extending side being aligned with one of the vertical upright supports. The system further has at least one inclined shelf having a first side, a second side, a third side, and a fourth side, the first side and the fourth sides being parallel to each other and perpendicular to the second and third sides.

Abstract: A shelving system, shelf assembly and components are easily retrofit on existing shelves for improved product presentation, stocking and maintenance. Shelf assemblies may include improved adjustable product stops and dividers, and improved rollers for automatic advance of product.

Abstract: A whatnot has upright posts, crossbeams and shelves, the upright posts being arranged vertically and each upright post is provided with at least one groove extending alongside the upright post and widening in inward direction thereof, wherein the crossbeams are provided at their ends with projections intended to be received by the groove in order to create a connection between the upright posts and the crossbeams, and wherein the shelves are connected to the crossbeams. The crossbeams are positioned in the grooves of the upright posts by shelf supports that are inserted into the upright posts. A stable and easy to dismantle whatnot is achieved by the fact that the shelves are removably connected to the crossbeams by means of dowels.

Abstract: A support structure (1) of items in general comprises a plurality of uprights (2) supporting a plurality of shelves (3). The structure exhibits connection members (4, 5, 8) arranged between each upright (2) and the shelves (3), and holding members (12, 13) associated to the shelves (3), which allow connecting at least two structures (1) with one another.

Abstract: A shelving assembly including at least one shelf member and at least one upright frame member wherein the frame member includes at least vertically arranged couplers and the shelf member includes two other vertically arranged couplers on one lateral edge where the couplers on either the shelf member or frame member include pins and the couplers on the other of the shelf and frame member include slot delineators and where the slot delineators open in the same direction so that, with the pins received within the slot delineators, the shelf member can be detached from the frame member by moving the shelf member in directions perpendicular to pin axis.

Abstract: A two-part shelf-holder for supporting shelves on connecting members fixed around vertical posts of a sectional rack. The shelf-holder includes a fixed part fixedly connected at one end to a corner of the shelf and a movable part pivotally connected at one end to the fixed part via a vertical pivotal shaft. The fixed part is formed at another end with a curved case defining a side opening. The movable part is formed at another end with a curved cover adapted to close the side opening of the case. A free end of the case is formed of a dovetail mortise and a free end of the cover is formed of a dovetail tenon for fitly engaging with the dovetail mortise of the case. Two ends of the pivotal shaft are extended through two long holes provided on upper and lower sides of the movable part, so that the movable part could be moved linearly relative to the fixed part to engage or disengage the dovetail tenon with or from the dovetail mortise so as to close or open the two parts of the shelf-holder.

Abstract: A sectional rack is constructed from multiple vertical supporting posts, horizontal shelves and connecting members. The supporting posts have a non-round cross section and the shelves have short sleeves provided at every corner thereof. Each supporting post is provided on its outer surface at a portion facing inward toward the rack with a plurality of equally spaced grooves. Each connecting member is adapted to firmly mount on the supporting post by engaging ribs provided on inner surface of the connecting member with the grooves on the supporting post. An outer surface of the connecting member opposite to the ribs is downwardly and outwardly inclined; and an inner surface of the sleeve of the shelf facing the inclined outer surface of the connecting member is correspondingly inclined.

Abstract: A slat wall structure including a substantially vertical support portion and at least one substantially horizontal web extending from the support portion. An end of the web includes a downwardly depending portion extending longitudinally along the end of the web, with the downwardly depending portion defining an upwardly extending recess. The recess is located below each of the webs, whereby both hook-like engagement brackets and upwardly extending mounting flange brackets can be supported by the slat wall. The web can also include a downwardly extending portion that defines at least one screw boss, wherein screws are receivable to mount the slat wall from its end. A pair of oppositely disposed and mutually spaced vertical end walls having a slat wall located between and attached to the end walls by screws placed through the vertical end walls and into the screw boss to thereby secure a side of the web to the vertical end walls and form an integral upright assembly which may be self-supporting.

Abstract: A display stand assembly comprising a plurality of display stand modules joined together. Each display stand module comprises an upper and lower base or spanner having a plurality of spanner members generally bisecting each other medially. A plurality of vertical uprights extends between the end portions of the spanner members of the upper and lower spanners and are joined to the ends of the upper and lower spanners with a plurality of wedges. A portion of each wedge fits around a clover defined on the vertical uprights and a bracket attached to each spanner member end slides over and attaches to each wedge.

Abstract: A shelving system, shelf support and shelf are provided that are adjustable vertically, horizontally and angularly for better product presentation and maintenance. Brackets are provided which allow depth or horizontal adjustment and another bracket is provided which gives shelf support and allows easier horizontal adjustment. The brackets also permit easier and more reliable vertical and shelf angle adjustments for better product presentation. Shelf assemblies are provided which include adjustable product stops and dividers. Other shelf and product presentation features are also provided.

Abstract: A display stand including a plurality of vertical uprights defining a plurality of holes. Four vertical uprights are joined together and a shelf is attached thereto with a first set of clips fixedly attached to a first end of the shelf and a second set of clips slidably attached to the second end of a shelf. The first set of clips are first engaged with holes defined in the vertical uprights. Next, the second end of the shelf is lowered into position substantially at the same height as the first end of the shelf, whereby the second set of clips is slid from the first position flush with the first end of the shelf to the second position extending into the holes defined in the vertical uprights in order to support the shelf within the vertical uprights.

Abstract: A shelving system includes a shelf and at least one leg. A finger is supported by the shelf and is extendable through an aperture in the skirt of the shelf. The finger includes a base portion and a retaining portion angled with respect to the base portion. A biasing member biases the finger toward a retracted position. The leg includes a slot having a wide portion and a narrow portion. The finger is movable against the biasing force of the biasing member to be received within the narrow portion of the slot such that the leg is sandwiched between the retaining portion of the finger and the skirt of the shelf. The shelf may be removed from the slot by moving the retaining portion of the finger into alignment with the wide portion of the slot in the leg such that the biasing member retracts the finger from the slot.

Abstract: A modular shelving assembly has at least three spaced poles, each having a connector, a first post unit and a second post unit. Each post unit has first and second opposing ends, with a first protrusion extending radially inwardly from the hollow interior surface of the first post unit adjacent the first end thereof, and a second protrusion extending radially inwardly from the hollow interior surface of the second post unit adjacent the second end thereof. Each connector has first and second opposing ends, a first track provided adjacent the first end of the connector and a second track provided adjacent the second end of the connector. Each of the first and second tracks has a leg portion extending from one of the first or second end of the connector, and a foot extending from the leg portion.

Abstract: A shelf engagement mechanism includes supports, taper sleeves, shelves, and rings. A plurality of annular engagement grooves are formed on a surface of each support and are arranged at predetermined longitudinal intervals. Each taper sleeve has a projection formed on an inner surface thereof and is attached to the support such that the projection is fitted into one of the annular engagement grooves. Each taper sleeve is tapered such that a diameter of an outer profile increases from a first end toward a second end. A ring is provided at each of four corners of the shelf. The ring is tapered such that a diameter of an inner profile increases from the first end toward the second end so as to be coincident, partially or entirely, with the outer profile of the taper sleeve. The ring is fitted onto the taper sleeve, which, in turn, is fitted onto the support.

Abstract: Shelf retaining collars function to releasably attach shelving to a plurality of vertical support posts. Each collar has an open front face for placement of the collars around the support posts. Also, each shelf retaining collar has a frusto-conical interior surface, and a pair of upwardly extending shelf supporting hooks that extend outwardly from the open front face. When the shelf retaining collars are attached to the support posts the hooks engage and support the shelving. Such shelving may be mounted horizontally or angularly, if desired.

Abstract: A display stand assembly comprising a plurality of display stand modules joined together. Each display stand module comprises an upper and lower base or spanner having a plurality of spanner members generally bisecting each other medially. A plurality of vertical uprights extends between the end portions of the spanner members of the upper and lower spanners and are joined to the ends of the upper and lower spanners with a plurality of wedges. A portion of each wedge fits around a clover defined on the vertical uprights and a bracket attached to each spanner member end slides over and attaches to each wedge.

Abstract: Specially designed articles of furniture for use in conference and office settings which include a plurality of uniquely configured supporting legs, one or more article support structures disposed centrally of the supporting legs and a novel connector member for interconnecting the support structures of the legs. The connector member also enables the quick and easy interconnection of the polygonal panels that make up certain of the article support structures of the apparatus. The articles of furniture can be used to support and transport a wide variety of devices such as audio and video equipment, slide projectors, overhead projectors and the like.

Abstract: A modular, low cost pallet and shelf assembly and a method for assembling the assembly is disclosed. The shelf assembly comprises a plurality of support members arranged so as to releasably accept a pallet therebetween, each vertical support member comprising a plurality of apertures disposed therethrough, wherein each aperture is configured so as to accept and releasably hold tabs inserted through the aperture, and a plurality of pallet securing members, each pallet securing member comprising at least one pallet securing member tab releasably securable within a vertical support member aperture and a securing surface for restraining the pallet between the vertical support members.

Abstract: A display stand assembly comprising a plurality of display stand modules joined together. Each display stand module comprises an upper and lower base or spanner having a plurality of spanner members generally bisecting each other medially. A plurality of vertical uprights extends between the end portions of the spanner members of the upper and lower spanners and are joined to the ends of the upper and lower spanners with a plurality of wedges. A portion of each wedge fits around a clover defined on the vertical uprights and a bracket attached to each spanner member end slides over and attaches to each wedge.

Abstract: A shelving apparatus for use with a rigid frame member wherein the apparatus includes at least one shelf member having a longitudinal axis and an end surface coincident therewith, first and second coupler pairs mounted to the shelf member and frame member, respectively, the second pair delineating a clearance region within a coupling plain, the couplers including first and second pins and first and second slot delineators which are operative to support the shelf in any of several different positions including at least one essentially horizontal position and which are configured and juxtaposed such that the shelf member can easily be dismounted from the frame member so that the first and second couplers pass into the clearance region.

Abstract: A furniture system includes a bed section and a work and storage section, each of which includes spaced end frame assemblies defined by corner posts and cross-members. The corner posts of each section can be stacked using a connector member to provide a loft bed configuration, and various storage or work components, such as a desk, are connectable to the posts below the bed. The posts include inwardly and outwardly facing recesses, and spaced vertical slots are formed in one of the recess walls. The bed includes rails having end tabs engageable within selected slots for adjustably securing the bed rails to and between the posts. The storage components and the desk also include bracket structure having tabs engageable within the post slots for adjustably mounting such components to the posts.

Abstract: A suspended shelf system for suspending one or more shelf members beneath an associated supporting structure includes a pair of shelf support brackets, and first and second pairs of vertically oriented upright elements which are each suspended from a respective end of one of the upper support brackets. Each support bracket includes at least one pair of upwardly extending teeth which are respectively positionable in openings defined by the upright elements. The shelf mounting system further includes at least one pair of shelf support brackets which respectively extend between the first and second pairs of upright elements in spaced apart, parallel relationship. Each of the shelf support brackets includes at least one pair of downwardly extending teeth, which are configured for cooperative engagement with the opening defined by the upright elements.

Abstract: A post with a series of generally parallel grooves defined therein and at least one shelf received, engaged, and supported by any of the grooves. A support frame has a base, a top, and cross-members disposed within and generally coextensive with the tubular post. A generally elastic sheet is disposed about the post to generally conform to the post sidewall and generally cover the grooves.An optional extension bar assembly has a collar receivable within any of the grooves and a bar with notches for receiving hangers. An optional connecting bar assembly has an elongated bar supported by two collars receivable within any of the grooves. Furthermore, there may be provided a holder for product information, and top and bottom housings mounted to the post with each containing a lighting assembly or the like.

Abstract: According to one aspect the invention a shelving system is provided comprising first and second vertically extending support structures, and a first set of shelving assemblies. The first and second vertically extending support structures are horizontally spaced from one another and the shelving assemblies are mounted above one another between the support structures. Each shelving assembly has at least one major surface and is locatable respectively in a first orientation, and a second orientation. In the first orientation the major surface remains substantially horizontal. In the second orientation the major surface is substantially vertical.

Abstract: A shelving unit apparatus and method comprises vertical posts arranged at corners of a rectangle. A plurality of shelves are vertically spaced from one another and supported by the posts. At a front of the shelving unit, a channel-shaped base rests on a floor on which the shelving unit rests, the base being attached to the front two posts at ends of the base by projecting head rivets received in keyhole-shaped slots in the front two posts. At least one aperture in the base portion of the base receives a mounting bolt to be anchored to the floor. The bottom shelf has its front end resting on an upper edge of the front vertical wall of the base. A rear of the bottom shelf is supported by a shelf holding element attached to the two posts at the rear of the shelving unit.

Abstract: A display unit comprising a flame and a plurality of trays, which may be removably mounted thereon. The frame is constructed from a one-piece cardboard blank, and comprises a back panel, sides, a top and a bottom. The sides, top and bottom are foldable into a double-wall configuration for added strength and stability. The trays include anchors and anchoring tabs for securing the trays to the frame. The trays may be divided into a plurality of compartments and may include a single or multiple tiers.

Abstract: In the combination of a shelf and a shelf-supporting apparatus, the shelf has a longitudinal axis and an end surface coincident with such axis. The apparatus supports the shelf at the shelf end surface. In the improvement, the shelf includes first and second support pins extending from the end surface in a direction parallel to the axis. These support pins define a first spacing dimension. The apparatus includes a support member having a first or forward slot and a second or rearward slot. Each slot has a pin-support portion with a clearance region therebetween. The clearance region has first and second boundaries, the second slot includes a pivot portion and the pivot portion and the first boundary define a second spacing dimension slightly greater than the first spacing dimension. The combination is adaptable to a wide variety of shelf types and has particular utility when used in a store fixture for retail display of articles offered for sale.

Abstract: An adjustable storage rack for books includes a frame having a U-shaped horizontal base, a pair of upwardly extending support members and a brace connecting the upper ends of the support members. A plurality of adjustable shelves have end portions connected between the support members and are arranged in a spaced parallel stair-step configuration.

Abstract: A modular rack comprises a plurality of upright support rods and shelves which are supported on various levels of the upright support rods in conjunction with a plurality of locating pieces, sleeves, and retaining pieces. The sleeves are fastened with the upright support rods in conjunction with the locating pieces and are provided with a retaining seat. The retaining pieces are fastened with four comers of the shelves. The shelves are releasably retained at various levels of the upright support rods such that the retaining pieces of the shelves are releasably retained by the retaining seats of the sleeves.

Abstract: A construction device includes a rack secured to one or more rods with one or more couplers. Each coupler includes a bore for receiving the rod, a base portion, a wall extended upward from the base portion and a panel extended downward from the base portion. The bottom portions of the panels are inclined relative to the wall for engaging with the rods and for securing the couplers to the rods. The couplers may further include one or more protrusions for engaging with the grooves formed in the rods and for further securing the coupler to the rod.

Abstract: The present invention is a rack system for a backpack which is secured to the interior of a standard backpack, and is accessible by means of a zippered flap in the backpack. The rack system has rigid side walls with slots or brackets for receiving a plurality of shelves either slidably or by snap fit connections. The shelves are angled for appropriate distribution of the weight of materials that the wearer is carrying. Optionally, at least one shelf may be equipped with a hinged lid and divided into compartments for storage of small items such as pens, rulers, etc. The shelves allow for improved organization of the backpack which subsequently prevents materials from being damaged.

Abstract: A modular, low cost pallet and shelf assembly and a method for assembling the assembly is disclosed. The shelf assembly comprises a plurality of support members arranged so as to releasably accept a pallet therebetween, each vertical support member comprising a plurality of apertures disposed therethrough, wherein each aperture is configured so as to accept and releasably hold tabs inserted through the aperture, and a plurality of pallet securing members, each pallet securing member comprising at least one pallet securing member tab releasably securable within a vertical support member aperture and a securing surface for restraining the pallet between the vertical support members.

Abstract: A shelving system employing an array of vertical standards defining vertically arranged pockets on the inwardly facing surface of each and a shelf. The shelf is rectangular and is formed from a single sheet of metal to which shoulder rivets are secured. The rivet heads extend outwardly of the side edges of the shelf and are arrayed to cooperate with a set of pockets to support and retain a shelf in association with the array of vertical standards.

Abstract: An easy-mount shelf holder for a sectional rack. The rack includes upright posts having spaced annular grooves for externally tapered sleeves attached thereto and shelves supported by shelf holders mounted around the sleeves. Each shelf holder includes a main part formed from a bar portion and a partially opened gripping ring portion provided at one end of the bar portion, and a cooperative part formed from an arm portion and a seal portion provided at an outer end of the arm portion. The cooperative part is pivotally connected at an inner end of the arm portion to the bar portion of the main part, such that when the cooperative part is turned toward the main part, the seal portion closes the partially opened gripping ring portion to define a complete and internally tapered ring portion suitable for tightly enclosing the tapered sleeve on the posts.

Abstract: A modular rack includes a pair of lateral frame portions with opposing inner surfaces, a shelf plate and four corner pieces. Each of the lateral frame portions includes two upright post units, each of which includes two upright pillars that cooperatively define a slot therebetween. Each of the lateral frame portions further includes a horizontal linking rod which interconnects the post units and which has an inner surface at the same side as the inner surface of the corresponding one of the lateral frame portions. Each of the corner pieces has a bottom wall, a top wall, and first and second side walls which interconnect the top and bottom walls. The first side wall extends in a direction transverse to the linking rod. The top and bottom walls and the first and second side walls cooperatively define a corner space thereamong for receiving a corner of the shelf plate therein.

Abstract: An adjustable shelf system is disclosed having vertical left and right end panels, one or more center panels, top and bottom panels for holding the end panels and center panels in spaced relation and a back panel. A plurality of shelves may be adjustably positioned at various levels between the end panels and center panels. Each of the end panels and center panels is formed with support loops that are interlockably engaged by insertable tabs formed on the left and right sides of each shelf. Alignment tabs on each shelf side defined common left and right lower edges that guide the shelf into its proper position during assembly and subsequent re-positioning. The support loops on opposed vertical panels (e.g., the left end panel and the center panel) are structurally different and unique to the left and right sides of the shelf, respectively, so that the shelf can be insertably mounted in only a single orientation and at the proper depth within the shelf system.

Abstract: A universal, height-adjustable bracket is provided for mounting a gravity flow rack product delivery system to an upright post of a support framework. The bracket includes an elongated body having first and second sets of fastening tabs projecting from opposite sidewalls thereof. The first and second set of fastening tabs are longitudinally offset from one another in order to provide relative height adjustability. A channel for engaging and supporting the gravity flow rack system extends transversely across the elongated body between the first and second sidewalls and sets of fastening tabs. Accordingly, by rotating the bracket 180.degree. about the longitudinal axis, the bracket may be used to cooperatively engage either right or left handed upright posts.

Abstract: A modular shelving system includes active and fixed storage levels. The storage levels are removably supported from support posts and are disposed at intermediate positions between a top shelf assembly and a base shelf assembly. Each active storage level is secured to a pair of slide assemblies allowing such to be displaced from the shelving system to provide convenient access to items stored thereon. The support posts may be in the form of cylinders having an array of vertical slots for receiving mounting hardware for supporting shelves. Alternatively, support posts having longitudinal slots formed therein in combination with slotted-post inserts may be used to support the shelves. An anti-tip leg assembly can optionally be employed to provide increased stability.

Abstract: A support assembly for a display shelf, includes an upright for supporting the shelf in an elevated position, the upright having a plurality of slots disposed therealong at vertical spacings whereby the shelf may be supported at a selected elevation, an upper hook engaged with one of the slots of the upright, an elongate member connected to the upper hook and extending downward from the upper hook, a lower hook connected to the elongate member at the position lower than the upper hook to engage the shelf, and a spacer interposed between the upright and the lower hook to retain the lower hook at a predetermined position with respect to the upright.

Abstract: A refrigerated cabinet includes first and second inner side walls therein, and a rear wall disposed at a rear portion of the cabinet. A pair of first container supports is provided for the cabinet, with each of the first container supports being mounted on the first and second inner side walls of the cabinet. The pair of first container supports are configured to engage and support a container of a first size therebetween. A pair of second container supports are provided, and are attached to the pair of first container supports. The pair of second container supports are configured to support a second container thereupon, with the second container being of a second size which has a larger width than the first container.

Abstract: A shelving construction which includes upright members having a U-shaped cross-section and a plurality of shelves connected between the upright members, is improved by providing at least one stiffener plate extending between and into two upright members disposed so that the flanks of each upright member extend toward the other upright member. The stiffener plate has an effective width so as to be snugly received within the upright members. Each upright member defines at least one bridging portion, and the stiffener plate has, for each bridging portion, two spaced-apart protrusions such that the bridging portion can snap into place between the protrusions when the stiffener plate is inserted into the respective upright member.