Slat wall structure with profile for different shelf support brackets and the like

Information

  • Patent Grant
  • 6349507
  • Patent Number
    6,349,507
  • Date Filed
    Wednesday, March 15, 2000
    24 years ago
  • Date Issued
    Tuesday, February 26, 2002
    22 years ago
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.
Description




BACKGROUND OF THE INVENTION




The present invention relates to slat wall structures, and in particular to a slat wall structure with a profile which accepts and permits mounting of various different types of support brackets.




Interior product-display walls having a horizontally extending slat-like appearance have come into increased usage and are quite popular as of the present point in time in commercial establishments, since they provide a convenient and highly useful way to display and/or store a variety of different consumer products. This is accomplished through the use of shelf-support or other such brackets that interfit with and are nestingly received by various types of projecting flange-like wall sections or edges that extend horizontally along with and typically define the edge extremities of the horizontally extending “slats” comprising these walls (which are typically formed as an integral part of a multi-slat panel that can be secured to a wall or otherwise vertically supported, and either be fixed or movable).




Examples of two different types of such commercially successful slat wall structures which are made of metal may be seen in prior U.S. Pat. Nos. 3,698,565 and 4,429,850 (which are related) and U.S. Pat. No. 4,961,295 (all incorporated by reference herein), which involve laterally elongated sheet metal structures which are bent or otherwise shaped longitudinally to form generally flat, horizontally extending wall sections which are spaced forwardly of support flanges or the like and which have a horizontal slat-like appearance when supported in vertically spaced relation to other such “slats” or slat wall structures. In the '565 and '850 patents just mentioned, a plurality of such “slats” are formed from a common elongated sheet of material, and thus together comprise a sort of panel which has vertically extending, rearwardly located wall-like sections as well as the forwardly spaced “slat-like” sections. In the '295 patent, the preferred embodiment depicts individual slat-like sheet metal components that are mounted upon and supported in place by vertical hanger strips that are mounted upon various types of vertical supports such as interior walls, columns or studs.




Each of the two different types of metal slat wall mentioned above may be thought of as being generally characteristic of known types of such structures which are presently available commercially, but they have particular profiles which differ considerably from one another in a specific sense, and each is used with a particular and different kind of shelf support bracket (also illustrated in such patents). The support bracket used with the '295 patent is basically of a type generally considered to be the “standard” slat wall bracket, but the ones shown in the '565 and '850 patents are considerably different. As is evident upon even casual consideration, each of these two different types of brackets are so different from one another that they could not possibly be used on the opposite type of slat wall. Accordingly, two distinctly different and completely separate types of support bracket and shelf systems have developed over time, each usable on only one of these two different types of slat wall structure. Therefore, purchasers and users have been significantly restricted in their available choices once they have purchased one or the other type of slat wall system.




SUMMARY OF THE INVENTION




The present invention recognizes the practical problem created by the mutually different slat wall systems described above, and provides a solution for the user/consumer, by which either of the two different types of support bracket in common usage may be used on the same type of slat wall. More particularly, the present invention provides a new and highly useful slat wall configuration or profile which will securely and supportively mount, and retain in place, either of the two different types of support brackets mentioned above. Accordingly, the present invention provides a universally useful new slat wall configuration which will free those who have previously invested in one or the other type of prevalent slat wall configurations described above, allowing them to purchase and use shelf supports or other such brackets of either type, depending upon their needs and desires, thereby greatly extending the usefulness of the systems in which they have invested and generally prompting competition as well.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is a perspective view of a slat wall structure embodying the present invention.





FIG. 2

is a side view of the slat wall of the first alternative embodiment of the present invention.





FIG. 3

is a front isometric view of the slat wall of the first alternative embodiment of the present invention.





FIG. 4

is a front isometric view of the slat wall of the second alternative embodiment of the present invention.





FIG. 5

is a front isometric view of the slat wall of the third alternative embodiment of the present invention.





FIG. 6

is a side view of a slat wall of the third alternative embodiment of the present invention.





FIG. 7

is a side view of a slat wall of the fourth alternative embodiment of the present invention.











DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS




For purposes of description herein, and in the appended claims, the terms “upper,” “lower,” “right,” “left,” “rear,” “front,” “vertical,” “horizontal,” and derivatives thereof should be understood as relating to the invention as orientated in FIG.


1


. However, it is to be understood that the invention may assume various alternative orientations, except where expressly specified to the contrary. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification, are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.




A first embodiment


10


and second embodiment


110


of the new slat wall configuration/profile is shown in detail in

FIGS. 3 and 4

, which depict the same as comprising a laterally elongated one-piece panel-like structure having a continuous vertical plate-like backing wall or section


12


,


112


, which supports in place a plurality of horizontally extending,


30


mutually spaced slat-like sections or elements


14


,


114


, comprising the “slats.” Each of the slat elements


14


,


114


is spaced outwardly of and disposed generally parallel to the backing wall section


12


,


112


, and supported in place by a horizontally extending rib or flange


16


that is oriented generally perpendicular to the vertical backing wall or section


12


,


112


, and integrally joined to the latter. Ribs or flanges


16


extend outwardly from backing wall


12


,


112


in generally horizontal relation for a predetermined distance, and then extend downwardly to define an angular section


18


which, at its lowermost extremity, extends outwardly to connect with the slat wall sections


14


,


114


at approximately their vertical midpoint, where the sections


18


integrally join the slat wall elements and support the latter in place. As will be appreciated, the integral slat wall structures


10


,


110


as just described may readily be manufactured as an extrusion, and a preferred embodiment of the same as presently contemplated would be an aluminum extrusion.




The structure of the slat wall embodiments


10


,


110


described above provides a vertically extending portion


20


of the slat wall elements


14


which is disposed above the meeting point or junction of the slat wall elements with the angular section


18


of rib or flange


16


. Between the wall portions


18


and


20


, a first mounting recess


22


is defined, as referred to further below. The lower portion


24


of slat wall elements


14


,


114


, which is located below the junction of the latter with the angular section


18


of rib


16


, defines an upwardly opening recess


26


that comprises a second mounting/retention area for accessory parts such as shelf support brackets, as will be explained further below. As illustrated, the lowermost extremity of lower slat wall portion


24


may be curved inwardly for added strength and retention security, and may form a screw boss as discussed below.




As illustrated in

FIGS. 3 and 4

, the slat wall panel structures


10


,


110


comprise one-piece generally rigid structures which, from the front side (i.e., the side on which the slat wall elements


14


,


114


are located) has the appearance of a laterally elongated wall having a plurality of separate vertically spaced, horizontally extending slat elements which are disposed forwardly of the remaining parts of the structure. Each such slat wall panel section is made to interfit with another such section located either above or below it, and to facilitate this, both the top and the bottom portions


28


,


128


, and


30


,


130


, respectively, of their backing wall sections


12


,


112


are preferably recessed horizontally to provide complementary top and bottom flange sections that will smoothly overlap with the corresponding portion of another such slat wall section disposed above or below, whereby a continuous vertical wall structure may be provided.




As indicated above, the embodiment


10


of

FIG. 3

is intended for direct flush mounting against an existing vertical wall or other such support (stud wall, etc.), and thus has a smooth flat surface on the near side of its backing wall section


12


. Also, a series of screw-receiving recesses


32


(

FIG. 3

) may be provided in the front side of the backing wall to facilitate screw insertion at any desired point along their length. The embodiment


110


of

FIG. 4

is intended for mounting upon a support bracket such as that disclosed in the aforementioned U.S. Pat. No. 4,961,295, which has upwardly extending tabs or tangs. Thus, the embodiment


110


of

FIG. 4

includes a series of rearwardly and downwardly extending horizontal rib sections


34


on the near side of its backing wall


112


, which comprise hangers that will hook over such upstanding support tabs to thereby mount the slat wall structure


110


thereupon. To facilitate this mounting and provide further positioning support, a series of rearwardly-extending abutment ribs


36


may also be provided, sized to come into direct contact with the portion of the aforementioned mounting bracket between its upstanding support tabs.




In the embodiment


110


of

FIG. 4

, the lowermost portion


124


of the slat wall element


114


is curved further inwardly toward the backing wall section


112


than was the case in the embodiment


10


of

FIG. 3

, to illustrate a further aspect of this portion of the structure. That is, lower portion or segment


124


is circularly curved over an area in excess of 180°, to define a screw boss


38


. This type of structure, or structural feature, may also be implemented in the embodiment


10


, of

FIG. 3 and

, as discussed further below (and illustrated in FIG.


1


), it is useful for supporting the slat wall panel


10


or


110


between a pair of vertical end wall sections


63


(

FIG. 1

) through which screws


38




a


pass to enter and thread tightly into the bosses


38


. This type of structure is typically free-standing, and therefore no wall or other such vertical support behind the slat wall panel is necessary, and in fact the slat wall panel(s) used in this configuration may be double-sided, i.e., may have slat elements on both the front and back, as exemplified by the embodiment


10




a


of

FIG. 1

, for display of merchandise or the like on each opposite side.




A refinement or modification of the slat wall panels


10


,


110


of

FIGS. 3 and 4

, respectively, constituting a preferred embodiment and best mode of the present invention, is illustrated in

FIGS. 5 and 6

, wherein it is designated by the numeral


210


. Like the previous embodiments


10


and


110


, slat wall panel


210


includes a vertically extending support wall or backing plate section, designated


212


, and a plurality of laterally extending slat wall elements, designated


214


, which are supported in place thereon and preferably made as a one-piece unit therewith by extrusion or the like. Each of the slat wall elements


214


, like the analogous elements


14


and


114


discussed above, includes an outwardly extending rib or flange


216


, a downwardly and outwardly extending section


218


, and an outer slat element or portion


220


which is integrally connected with portions


218


and


216


as a continuous structure. As made evident in

FIGS. 5 and 6

, the outer slat portion


220


joins the downwardly and outwardly extending mid portion


218


at their respective lowermost extremities, rather than at a point between the top and bottom of portion


220


, as in the embodiments of

FIGS. 1

,


2


,


3


, and


4


. Further, the rib or flange portion


216


is curved rather than substantially straight over its extremity, unlike the analogous portions


16


and


116


illustrated in

FIGS. 3 and 4

.




The structural refinements or revisions of embodiment


210


are principally implemented to provide the most efficient and most economically produced form of the invention for manufacture by extrusion, but in a functional sense this embodiment provides the same basic advantages and purposes of the embodiments


10


and


110


discussed above and referred to subsequently herein. One further aspect of the preferred embodiment


210


is that it is preferably formed so as to provide a pair of differently-sized screw bosses


238


,


240


, which are analogous to the screw boss


38


illustrated in FIG.


3


and discussed above, and provided for the same purpose. To further carry out this purpose, a plurality of horizontally extending parallel ridges


242


are preferably provided as an integral part of the structure forming screw boss


238


, and extend longitudinally along the inside of the latter to ensure positive contact with screws which are used for mounting slat wall panel


210


at its ends, in the manner discussed above in connection with FIG.


3


and illustrated in FIG.


1


. Similarly, screw boss


240


preferably includes a similar plurality of mutually spaced longitudinal internal ridges


244


(FIG.


6


). As illustrated, screw boss


238


has a larger diameter than boss


240


, for receiving larger and stronger screws (or bolts), as may be desirable in large-size installations.




Another refinement or modification of the slat wall panels


10


,


110


of

FIGS. 3 and 4

, respectively, constituting a fourth embodiment of the present invention, is illustrated in

FIG. 7

, wherein it is designated by the numeral


310


. Like the previous embodiments


10


,


110


and


210


, slat wall panel


310


includes a vertically extending support wall or backing plate section, designated


312


, and a plurality of laterally extending slat wall elements, designated


314


, which are supported in place thereon and preferably made as a one-piece unit therewith by extrusion or the like. Each of the slat wall elements


314


are like the analogous elements


14


,


114


and


214


discussed above, and include an outwardly extending rib or flange


316


, a downwardly and outwardly extending section


318


, and an outer slat element or portion


320


, which is connected with portions


318


and


316


as a continuous structure. As made evident in

FIG. 7

, the outer slat portion


320


joins the downwardly and outwardly extending mid-portion


318


at their respective lowermost extremities, rather than at a point between the top and bottom of portion


320


, as in the embodiments of

FIGS. 1-4

.




The illustrated slat wall


310


includes a top portion


328


and a bottom portion


330


such that the slat wall


310


is made to interfit with another such slat wall


310


located either above or below it. The bottom portion


330


has a rounded end


350


shaped to interfit into a channel


352


of the top portion


328


in a tongue and groove-like manner. The rounded portion


350


and the channel


352


also include an interfitting flange


356


and a recess


354


, respectively, to interlock adjacent slat walls


310


. As illustrated, the backing plate section


312


includes a series of screw bosses


342


located between slat wall elements


314


on opposite sides of the backing wall section


312


. The screw bosses


342


facilitate screw insertion and are useful for supporting the slat wall panel


310


between the pair of vertical end wall sections


62


through which screws


38




a


pass to enter and thread tightly into the bosses


342


, similar to the embodiment


10




a


of FIG.


1


.




Each of the slat wall panel embodiments


10


,


110


,


210


and


310


discussed above and illustrated in the various figures (particularly

FIGS. 3

,


4


,


5


,


6


and


7


) provide the desirable advantage, referred to previously, of accepting and supporting in place each of the two most prevalent types of support brackets commonly used to mount display shelves, trays, hooks, and a variety of other such structures upon slat walls, for the display of merchandise thereon at a position spaced outwardly from the outermost surface of the slat elements


14


,


114


,


214


,


314


. The manner in which this is accomplished is illustrated in

FIGS. 1 and 2

, in which two such different types of prior art brackets or supports


50


,


60


are illustrated in mounted position upon slat wall panel


10




a


of

FIG. 1 and 110

in

FIG. 2

(which illustrations should be considered typical of and true with respect to the slat wall panel embodiments


210


and


310


as well).




Referring more particularly to

FIG. 2

, it will be observed that prior art bracket type


50


has a top part


52


which terminates in a downwardly extending mounting flange portion


54


, which provides its principal support. In accordance with the present invention, the ribs or flange portions


18


and


20


defining the slat element


14


are spaced apart to provide a recess


22


therebetween, and this is proportioned so as to conformably receive the downwardly extending mounting flange


54


of bracket


50


. This hook-like engagement provides the vertical support (bears the weight) of bracket


50


and a shelf


51


or the like which it is designed to support in place; however, this manner of mounting and supporting an outwardly-positioned weight will of course produce a moment arm about flange


54


and recess


22


as a pivot point. Consequently, bracket


50


includes a lower portion


56


comprising a vertically extending abutment flange which is sized and positioned so as to lie in flush abutment against the outer face of one or more of the adjacent slat portions


20


located immediately below the one on which bracket


50


is so hung (as illustrated in FIG.


2


). As also illustrated in this figure, the upward extent of slat wall portion


20


of this embodiment is preferably sized so as to make contact with the underside of bracket top part


52


when the latter is hung upon it in the manner just described. While the depth of recess


22


is preferably sized so that mounting flange


54


bottoms in it when slat portion


20


lies in contact with the underside of bracket top part


52


, as just described, the latter such relationship (engagement of the top of slat portion


20


with the underside of bracket top part


52


) is the one to which the higher priority should be given.




As already indicated,

FIG. 2

also depicts the mounting of what is known as a “standard” type shelf support bracket


60


upon slat wall panel


110


(as an example of all three such embodiments disclosed), and also the mounting of similarly configured hooks or pegs


64


. As illustrated, bracket


60


has a rearwardly and upwardly extending mounting flange


58


which projects upwardly into and is received within the space


26


provided between the slat structure


114


and vertical support wall


112


. Furthermore, mounting flange


58


has a horizontal section


58




a


whose underside lies upon the top of slat wall portion


20


to provide the primary load-bearing point, in the same manner as that described above in connection with bracket


50


. In addition, a vertical lower portion


62


of bracket


60


lies flush against the face of slat structures


14


disposed immediately below the one on which bracket


60


is hung by its mounting flange


58


, to resist any moment arm about the primary load-bearing point located above. In the case of shelf-support bracket


60


, an integrally formed shelf portion


61


, generally analogous to shelf portion


51


of bracket


50


discussed above, is attached to the bracket portion and projects outwardly therefrom to support merchandise or the like. (The particularities of brackets


50


and


60


are not specifically a part of the invention, and in fact are part of the prior art). In this arrangement, weight applied to the outwardly projecting shelf portion


61


of bracket


60


(which typically is canted upwardly at least slightly, as illustrated in

FIG. 2

) bears downwardly upon the slat structure


114


upon which the bracket is hung, and any outward disengaging movement of the bracket relative to the slat upon which it is hung is resisted by engagement of the upwardly extending mounting flange


58


against the rear side of the slat structure


114


disposed immediately above (in particular, the curved lower extremity thereof.




As illustrated in

FIG. 1

, the support bracket


60


and its integral shelf portion


61


may have a lateral width different from that of bracket and shelf


50


,


51


, and may be either wider or narrower than the latter. Further, a directly similar but very narrow support bracket


60




a


may be used with an integral or attached peg-like or other such hook


61




a


on which merchandise may be hung. All of these represent known, commercially available equipment, of which there may be numerous other specific types as well. The main point is, the invention makes all of them mountable on the same slat wall panel, along with the other type of support bracket


50


.




Accordingly, it will be seen from the foregoing that all three of the slat wall panel embodiments


10


,


110


,


210


and


310


disclosed herein provide the “universal” display bracket mounting function described in connection with

FIG. 2

, since each of the embodiments will reliably mount and retain in place either or both types of the known support brackets


50


or


60


. Thus, by utilizing the novel slat wall panel of the present invention, a merchandiser may continue using either type of such bracket he or she may happen to have acquired previously but is at the same time free to acquire either type of bracket in the future, since each are made to be equally useful by the present invention.




By way of further illustration of the general type of known of shelf support brackets


50


depicted in

FIG. 2

, a variety of alternative embodiments of that bracket are illustrated in the aforementioned U.S. Pat. No. 4,429,850 (i.e.,

FIGS. 2

, and


3


thereof. These further showings are merely referred to herein as further examples of known display support brackets which are mountable by using the novel slat wall panel configuration provided hereby. In this regard, it should be appreciated that the embodiment shown in

FIG. 2

of the above patent has a rearwardly extending abutment portion at its lowermost extremity which is proportioned so as to make into direct abutment with the outer (front) surface of vertical support wall


112


, but it will be recognized that this is equally applicable to the present invention and this is the purpose of the additional portions


53


,


63


shown in phantom in

FIG. 2

, which obviously should be located so as to lie between a pair of vertically adjacent slat structures


114


or the like.




The purposes, objectives, and advantages of the invention will be understood by those skilled in the art following consideration of the foregoing description and attached drawings. Of course, the above description is addressed to the preferred embodiments only. Modifications of these embodiments may occur to those skilled in the art and to those who make or use the invention, without departing from the underlying invention itself. Therefore, it is to be understood that the particular embodiments shown in the drawings and described above are merely for illustrative purposes and these should not be interpreted as limiting the scope of the invention.



Claims
  • 1. A slat wall for supporting hook-like engagement brackets and upwardly extending mounting flange brackets comprising:a substantially vertical support portion; at least one substantially horizontal web extending from said support portion, an end of the web including a downwardly depending portion extending longitudinally along the end of the web, the downwardly depending portion defining an upwardly extending recess; wherein the recess is located below the at least one web, whereby both hook-like engagement brackets and upwardly extending mounting flange brackets can be supported by the slat wall; wherein the downwardly depending portion defines at least one screw boss adapted to receive screws placed through vertical end walls, to thereby secure the ends of the webs to the vertical end walls.
  • 2. The slat wall of claim 1, wherein:the downwardly depending portion defines two screw bosses.
  • 3. The slat wall of claim 2, wherein:a first screw boss of the two screw bosses is located below the web.
  • 4. The slat wall of claim 3, wherein:the downwardly depending portion has a substantially U-shaped cross-section; and a second screw boss of the two screw bosses is located within the downwardly depending portion.
  • 5. The slat wall of claim 1, wherein:the downwardly depending portion has a substantially Y-shaped cross-section; and the at least one screw boss is located within a bottom leg of the substantially Y-shaped cross-section.
  • 6. The slat wall of claim 1, wherein:the at least one screw boss is circularly curved over an area of about 180°.
  • 7. A slat wall for supporting hook-like engagement brackets and upwardly extending mounting flange brackets comprising:a substantially vertical support portion; at least one substantially horizontal web extending from said support portion, an end of the web including a downwardly depending portion extending longitudinally along the end of the web, the downwardly depending portion defining an upwardly extending recess; wherein the recess is located below the at least one web, whereby both hook-like engagement brackets and upwardly extending mounting flange brackets can be supported by the slat wall; wherein the support portion includes a rearward side and mounting elements on said rearward side for mounting the slat wall on complementary support members attached to existing vertical support surfaces.
  • 8. A slat wall for supporting hook-like engagement brackets and upwardly extending mounting flange brackets comprising:a substantially vertical support portion; at least one substantially horizontal web extending from said support portion, an end of the web including a downwardly depending portion extending longitudinally along the end of the web, the downwardly depending portion defining an upwardly extending recess; wherein the recess is located below the at least one web, whereby both hook-like engagement brackets and upwardly extending mounting flange brackets can be supported by the slat wall; wherein said substantially vertical support portion defines at least one screw boss adapted to receive screws placed through vertical end walls, to thereby secure the slat walls to the vertical end walls.
  • 9. A slat wall comprising:a substantially vertical support portion; at least one substantially horizontal web extending from the support portion; the web including a downwardly depending portion defining at least one screw boss wherein screws can be placed through vertical end walls and into the screw boss to thereby secure a side of the web to the vertical end walls.
  • 10. The slat wall of claim 9, wherein:the downwardly depending portion defines two screw bosses.
  • 11. The slat wall of claim 10, wherein:a first screw boss of the two screw bosses is located below the web.
  • 12. The slat wall of claim 11, wherein:the downwardly depending portion has a substantially U-shaped cross-section; and a second screw boss of the two screw bosses is located within the downwardly depending portion.
  • 13. The slat wall of claim 9, wherein:the downwardly depending portion has a substantially Y-shaped cross-section; and the at least one screw boss is located within a bottom leg of the substantially Y-shaped cross-section.
  • 14. The slat wall of claim 9, wherein:the at least one screw boss is circularly curved over an area of at least 180°.
  • 15. The slat wall of claim 9, wherein:the support portion and the at least one substantially horizontal web are formed from an extruded one-piece member.
  • 16. The slat wall of claim 9, wherein:the downwardly projecting portion has a generally vertical outer face portion for serving as a stabilizing abutment to help retain a support bracket in place.
  • 17. The slat wall of claim 9, wherein:the support portion includes mounting elements on a rearward side for mounting the slat wall on complementary support members attached to existing vertical support surfaces.
  • 18. The slat wall of claim 9, wherein:at least one substantially horizontal web includes a plurality of substantially horizontal webs extending generally parallel to one another in mutually spaced horizontal disposition.
  • 19. A slat wall structure for supporting hook-like engagement brackets and upwardly extending mounting flange brackets comprising:a pair of oppositely disposed and mutually spaced vertical end walls; and a slat wall located between and attached to the end walls; the slat wall including a substantially vertical support portion and at least one substantially horizontal web extending from the support portion; an end of the web including a downwardly depending portion extending longitudinally along the end of the web, the downwardly depending portion defining an upwardly opening recess; wherein 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.
  • 20. A slat wall structure comprising:a pair of oppositely disposed and mutually spaced vertical end walls; and a slat wall located between and attached to the end walls; the slat wall including a substantially vertical support portion and at least one substantially horizontal web extending from the support portion; the web including a downwardly extending portion defining at least one screw boss, wherein screws are receivable through the vertical end walls and into the screw boss to secure a side of the web to the vertical end walls.
CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No. 60/124,466, filed Mar. 15, 1999.

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