Patent Publication Number: US-9854703-B1

Title: Mount rack frame

Description:
This application is a continuation in part of pending U.S. utility patent application Ser. No. 14/745,644 filed Jun. 22, 2015 which is a continuation of Ser. No. 13/387,029 filed Apr. 27, 2009, and which is a continuation in part of U.S. utility patent application Ser. No. 11/364,495 filed Feb. 28, 2006 and now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     This invention relates to a second modular mount rack frame for storing computer related devices such as hubs, switches, routers and servers. More particularly this invention relates to a second modular mount rack frame with detachable rigid modular support structures. This second modular mount rack frame also contains connecting plates for vertical attachments, lateral adjustment components and vertically attachment of two individual modular rigid support structures. Furthermore, there are connecting brackets which attach to both mounted devices and modular rigid support structures, thereby effectively stacking them vertically within the frame. 
     The prior art discloses cabinets for storage of computer related device which are expensive and cumbersome. They also require humidity and temperature controls because of their non-ventilated interior environment. Prior art storage structures also lack flexibility for adjusting the horizontal dimension of the mount rack frame whenever devices deviate from standard horizontal dimensions. Furthermore, because these prior art storage structures are not modular; they cannot stack vertically upon each other in an interchangeable manner. Prior art storage structures also do not exhibit reversibly attached rack bases by which the mount rack frame moves across a flat horizontal surface such as a floor. 
     The second mount rack frame solves these problems in an economical manner and contains the advantages of the mount rack frame previously described in U.S. utility patent application Ser. No. 11/364,495. With partially elliptical apertures and appropriate mechanical fasteners, the horizontal dimension within a standard mount rack frame is easily manually adjustable. If mobility is desired, each mount rack frame reversibly attaches to a rack base which includes wheels or coasters. 
     The current mount rack frame comprises numerous prototypes with dimensions which conform to standardized measurements (as well as multiples thereof) of the computer device industry. Because the mount rack frame is modular, additional rigid modular support structures vertically stack upon posterior or first anterior rigid modular support structures for increased storage. 
     The second mount rack frame accommodates servers as well as hubs, switches, routers which were the subject of U.S. application Ser. No. 11/364,495. This improved second modular mount rack frame comprises larger wider frame components for easier assembly. Second mount rack frame also implements thick bolts with matching self-locking inserted hex nuts. As in the prototypes in U.S. application Ser. No. 11/364,495, now abandoned, modular rigid support structures stack upon each other vertically for additional storage. 
     My second mount rack frame has up to two sets of rigid vertically aligned components which are spaced to create up to two parallel rigid modular multi-component support structures with parallel horizontal rigid components. The anterior rigid modular multi-component support structure can be taller than the posterior modular unit or vice versa. In this second mount rack frame these rigid modular multi-component rigid support structures may also be the same height, although both attach to two corresponding straight base supports. 
     The second mount rack frame performs two important functions: It may connect at two opposing anterior points along a server or hub for support solely by two opposing vertical rigid support components. The second mount frame also connects at four points—two anterior and two posterior—along larger devices such as servers. The four point vertically second mount rack frame component can also be vertically expanded by adding interchangeable modular rigid support structures. 
     None of the prior art prototypes possess the capability for (i) reversible and interchangeable four opposing point and two opposing point support of computer related devices by (ii) the reversible removal of a posterior modular rigid support structure; and thereby (iii) reducing the mount rack frame to one anterior modular rigid support structure for lighter devices. The second mount rack frame comprises the structural capability to support 
     (i) more than one rigid multi-component support structure in vertical alignment and attachment to 
     (ii) both laterally aligned rigid multi-component support structures, and 
     (iii) with or without a maximum load of stored attaching vertically aligned devices. 
     In a second embodiment of the second mount rack frame a single modular rigid multi-component support structure comprises structural features, preferably aligned aperture pairs and inserted mechanical fasteners, by which to vertically attach another rigid modular rigid support structure. Each such vertically aligned modular rigid support structure is preferably interchangeable with the remaining vertically aligned modular rigid support structure. Each single modular rigid support structure also functions as a mount rack frame, without additional rigid multi-component modular support structure(s), when attached to a mount rack frame base. Each single modular rigid support structure in both the four-point frame and the second embodiment also preferably comprises structural features by which each rigid modular multi-component support structure is adjusted to compensate for mechanical deviations in (i) attaching devices that attach mounted devices to the frame (ii) as well as the mounted devices themselves. This second embodiment of the second mount rack frame may also support more than one additional rigid multi-component support structure in vertical alignment and attachment. 
     In a third mount rack frame there is an upper rigid horizontal component comprises a single rigid metal strip that attaches to each of two opposing rigid vertical components. There is also a lower rigid horizontal component that (i) attaches to the two opposing rigid vertical components, and (ii) weighs more than the upper rigid horizontal component. The two rigid vertical components directly oppose each other, and each rigid vertical component comprises a longitudinal vertical recess to reduce frame weight. As in the second mount rack frame, each rigid vertical component attaches to each rack base leg along the longitudinal length of the rack base leg in a perpendicular manner. Each rigid vertical component also preferably attaches to each rack base leg along the longitudinal length of each rack base leg in an anterior-posterior configuration. This anterior-posterior attachment of each rigid vertical component provides a free-standing ability to the frame even when the maximum number of stored devices are attached in vertical alignment along the longitudinal length/height of rigid vertical components. 
     SUMMARY OF THE INVENTION 
     The second mount rack frame disclosed and claimed herein comprises at least one modular rigid support structure, but this frame can contain at least four modular rigid support structures. Each modular rigid support structure contains at least two rigid interchangeable vertical components and two rigid interchangeable horizontal components, and all of which are assembled to each other within a very short time period. Each rigid horizontal component and rigid vertical component also preferably contains partially elliptical apertures and bolts or screws. These apertures congruently align for horizontal adjustment of rigid vertical components, as well as for mechanical attachment to other rigid components. 
     The second mount rack frame preferably contains at least two modular rigid support structures. In this preferred embodiment there is a total of four rigid vertical support components, and each modular rigid support structure is easily assembled from interchangeable rigid components. When the second mount rack frame comprises four vertical rigid components, then the second mount rack frame can support servers which range to 40 inches in depth (using 25 inch universal brackets). At least one modular rigid support structure can vertically align and stack upon another rigid modular support structure for additional device support and storage, and without additional floor space. 
     For all anterior and posterior modular rigid support structures, partially elliptical apertures containing bolts or screws are spaced along the rigid vertical and rigid horizontal components in aperture pairs. Several partially elliptical apertures contain a centrally positioned screw or bolt with a lateral clearance on either side of that screw of preferably and approximately 1/16 inch. As a result, certain screws within specific partially elliptical apertures can move laterally, and this lateral movement results in an adjustable horizontal distance between two opposing rigid vertical components within one modular rigid support structure. Bolts and screws within partially elliptical apertures also attach vertical rigid components to horizontal rigid components. 
     Other congruently aligning apertures have different functions. For example, rigid horizontal components contain smaller partially elliptical apertures for vertically attaching two modular rigid support structures to each other. Round threaded apertures within rack base legs attach rack base or straight base legs to a single rigid support structure or two module mount rack frames. Partially elliptical apertures within rigid vertical components attach (i) support plates with mechanical fasteners to stacked rigid support structures; and/or (ii) rack base legs to vertical rigid components. 
     Each modular rigid support structure has a horizontal length and vertical height of one ‘LT,’ or a multiple thereof. A U is the unit of measurement in the computer industry, and each U designates a horizontal width of nineteen and a perpendicular height of one and three-quarters inches (for either an attached device or the actual mount rack frame). A second U standard designates a horizontal length of twenty-four inches, but the nineteen-inch standard is more ubiquitous. Width (depth) of an attached device can vary and still remain within one U (or multiples thereof). 
     For example, a standard industry measurement of 3 U is equivalent to approximately 1.75×3 inches in height of the attached device (or vertical height interval along each rigid vertical component). Devices attach within each rigid support structure by vertically and linearly aligned apertures and inserted screws along rigid vertical components. There are also two sets of vertically aligned rack apertures along each rigid vertical component. As a result, the user can either attach the device more anterior or posterior along a modular rigid support structure. 
     In addition, each rigid vertical component end comprises apertures into which bolts or screws reversibly insert to attach a straight base leg. In the second mount rack frame, each straight base leg or rack base leg containing coasters or wheels with locking mechanisms and the same is true for the left and right rack base leg of the third mount rack frame. These coasters or wheels provide mobility to the mount rack frame or single modular rigid support structure. 
     Each rigid horizontal component is interchangeable structurally and functionally with all other rigid horizontal components of the same length and width. Consequently, in the second mount rack frame any rigid horizontal component can function as an upper horizontal component or a lower horizontal component of a modular rigid support structure with respect to a supporting flat surface such as a floor. Each rigid vertical component end contains partially elliptical apertures for (i) attaching a connecting plate to a two-module mount rack frame, or (ii) reversibly attaching a rack base to a rigid support structure. 
     To increase the storage capacity of the mount rack frame, one modular rigid support structure is stacked and aligned vertically upon the other. Since each modular rigid support structure is identical in structure and function to the other, all rigid support structures function either as the bottom or upper (stacked) modular unit. Rigid flat connecting plates, as well as additional bolts or screws, along the corresponding rigid vertical components reversibly attach an upper aligned rigid support structure upon the supporting lower modular rigid support structure. 
     The anterior modular rigid support structure of the four point second mount rack frame is preferably taller than the posterior rigid support structure, but they are of the same horizontal dimension. In other embodiments the posterior rigid support structure may be taller than the anterior modular rigid support structure, as anterior and posterior positions along straight base legs are reversible and interchangeable. 
     The anterior modular rigid support structure in combination with posterior modular rigid support structure of the second mount rack frame is designed for attachment of computer-related devices which require four point anterior/posterior attachments for adequate support. In this particular application, two anterior opposing points along opposing sides a computer related device attach to a first anterior modular rigid support structure. Simultaneously two posterior opposing points along opposing posterior sides of the same computer related device attach to the posterior modular rigid support structure. 
     In the preferred embodiment of the second mount rack frame, preferably both anterior and posterior rigid modular support structures are parallel to each other and attach to a first and second corresponding straight base legs to form a square or rectangle. For other embodiments, the reversibly attached first posterior modular rigid support structure is easily removed from the first anterior modular rigid support structure. When so removed, the posterior modular rigid support structure becomes the smaller lightweight and less cumbersome unit which accommodates smaller computer related devices as well as smaller budgets. None of the embodiments of this second laterally attaching frame requires attachment or support to another structure or feature that is external to the frame to be free-standing with or without attached stored devices in vertical alignment, except for contact along the bottom of the frame with a flat surface. 
     In the second embodiment the second mount rack frame, a single rigid multi-component modular support structure that reversibly attaches to a rack base. This rack base preferably comprises a first single straight rigid rack base leg and a second single straight rigid rack base leg. The single rigid multi-component modular support structure includes structural features by which
         (i) To reversibly vertically align with and attached to at least one additional rigid multi-component modular support structure; and   (ii) To reversibly adjust a linear dimension of each rigid multi-component modular support structure, and   (iii) To interchangeably attach each one of the rigid multi-component modular support structures to the rack base so each individual rigid multi-component support structure has utility as a mount rack frame without vertical attachment or alignment of other rigid multi-component support structures.       

     A third preferred embodiment of the mount rack frame comprises two rigid horizontal components, two rigid vertical components, a single left rack base leg and a single right rack base leg. The two rack base legs oppose and are parallel to each other with respect to each rack base leg longitudinal length. Each rack base leg longitudinal length is also quantitatively greater than the rack base leg&#39;s width or thickness. Each rack base leg has a preferred weight, and each rigid vertical component and rigid horizontal component also have a preferred weight, width, longitudinal length and thickness. 
     For this third embodiment the rigid upper horizontal component comprises a single metal strip that attaches to each of two opposing rigid vertical components in a perpendicular manner. The lower positioned rigid horizontal component comprises a co-extensive lower longitudinal recessed surface that includes preferably at least four, and preferably five, aligned equidistantly spaced aperture pairs. With these aligned aperture pairs and inserted mechanical fasteners, this frame can vertically align with and attach to a rigid multi-component support structure of the second mount rack frame whenever its rack base legs are omitted. In sum, this third frame exhibits some modular utility whenever a single rigid multi-component support structure with interchangeable rigid horizontal component serves as the storage unit attaching directly to a rack base. 
     Each longitudinal rack base leg for all disclosed embodiments comprises four apertures configured as a square for
         (i) attaching a rigid vertical component along the rack base leg in a perpendicular manner   (ii) with corresponding inserted mechanical fasteners, and most preferably bolts.
 
Each rigid vertical component attaches to a corresponding rack base leg at a distance from the anterior end of each rack base leg at which (i) the mount rack frame is free-standing and (ii) does not require support or attachment for features or devices external to the frame (iii) except for contact along its bottommost surfaces or coasters/wheels with a horizontal surface.
       

     Accordingly, it is a purpose of the present invention to provide an economical manner in which to store both heavy and lightweight computer-related devices without the use of shelves. 
     It is also a goal of the present invention to provide an economical manner in which to store computer-related devices mounted to a mount frame rack at two and/or four points of attachment. 
     It is also a goal of the present invention to provide reversibly attached modular rigid support structures for storage of vertically aligned electronic devices. 
     It is also a goal for the present invention to provide base legs with coasters or wheels which attach to modular rigid support structures. 
     It is another goal of the present invention to provide a device for adjusting a linear dimension of a modular rigid support structure. 
     It is another goal of the present invention to provide mechanical attachments by which a modular rigid support structure is vertically aligned upon another modular rigid support structure. 
     It is another goal of the present invention to provide modular rigid support structures which are structurally and functionally interchangeable with respect to vertical stacked alignment and attachment to a rack base leg or a straight base leg. 
     It is another goal of the present invention to provide a mount rack frame in all embodiments which is free-standing and self-balancing without attachment or support from other structural features, except for contact of a bottom rack base, coasters, or wheels with a horizontal surface 
     It is another goal of the present invention to provide a mount rack frame in which a single storage unit is lighter in weight and free standing whenever it supports mounted devices in vertical alignment. 
     It is another goal of the present invention to support vertically aligned stored devices without attachment or support to structures or features external to any embodiment of the mount rack frame. 
     These features, as well as other improvements of the present invention, are apparent after review of the attached figures and DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT, BEST MODE AND OTHER EMBODIMENTS. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a partial anterior view of the preferred embodiment of the second mount rack frame. 
         FIG. 2  is a partial posterior view of the second mount rack frame of  FIG. 1 . 
         FIG. 3  is a lateral view of the second mount rack frame of  FIG. 1 . 
         FIG. 4  is a partial anterior view of another embodiment of the second mount support rack with mounted devices. 
         FIG. 5A  is an exploded view of an anterior modular rigid support structure and rack base legs. 
         FIG. 5B  is an exploded view of the second mount rack frame with an additional vertically aligned modular rigid support structure. 
         FIG. 5C  is an exploded view of the preferred modular rigid support structure. 
         FIG. 6  is a close up isolated view of a prior art connecting bracket attaching to rack apertures and a mounted device. 
         FIG. 7  is an exploded view of second posterior modular rigid support structure in an upper aligned position upon first posterior modular rigid support structure. 
         FIG. 8A  is an isolated close up schematic anterior view of the lateral movement of bolts within partially elliptical apertures. 
         FIG. 8B  is a partial anterior view of the preferred embodiment of  FIG. 1  with bolts moved laterally. 
         FIG. 9  is an anterior view of the third mount rack frame with attached vertically aligned devices. 
         FIG. 10  is a partial anterior view of the mount rack frame of  FIG. 9 . 
         FIG. 11  is a lateral view of the mount rack frame of  FIG. 9 . 
         FIG. 12  is a partial posterior view of the mount rack frame of  FIG. 9 . 
         FIG. 13  is an upper plan view of the rack base legs and lower horizontal component of the mount rack frame of  FIG. 9 . 
         FIG. 14  is an exploded view of the mount rack frame of  FIG. 9 . 
         FIG. 15A  is a partial anterior view of the mount rack frame of  FIG. 9  attaching to a rigid modular multi-component support structure. 
         FIG. 15B  is an exploded view of the mount rack frame of  FIG. 15A . 
         FIG. 16  is a partial anterior view of the mount rack frame of  FIG. 9  without attached vertically aligned devices. 
         FIG. 17  is a partial lower view of the mount rack frame of  FIG. 9 . 
         FIG. 18  is a posterior perspective view of the mount rack frame of  FIG. 9 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT, BEST MODE AND OTHER EMBODIMENTS 
     Preferred Embodiment of Second Modular Mount Rack Frame  1   
     Referring initially to  FIG. 1 , the preferred embodiment of the second modular mount rack frame  1  comprises a first anterior modular rigid support structure  2   a  and a first posterior modular rigid support structure  2   b  (generally modular rigid support structures  2 ). Second modular mount rack frame  1  rests upon a flat horizontal surface  480  such as a floor. First anterior rigid support structure  2   a  and first posterior rigid support structure  2   b  preferably differ in vertical height  10   b , but have the same depth  10   c . All modular rigid support structures  2  are identical in structural features and design to each other, but with U sizes ranging from 12 through 40. The preferred embodiments and other embodiments of second modular mount rack frame  1  are free-standing. These embodiments do not require support from structures exterior to mount rack frame  1  to support vertically aligned stored devices  78  except for contact of lowermost rack base leg surfaces  606   a ,  606   b  or coasters and wheels  470  with a horizontal surface  480 . 
     Referring again to  FIG. 1 , first anterior modular rigid support structure  2   a  is preferably greater in vertical height  10   b  than posterior modular rigid support structure  2   b . However, first anterior modular rigid support structure  2   a  has the identical effective horizontal dimension  10   a  as first posterior modular rigid support structure  2   b , and all modular rigid support structures  2  in other embodiments. Effective horizontal dimension  10   a  is preferably approximately nineteen inches. Each first anterior modular rigid support structure  2   a  or first posterior modular rigid support structure  2   b  can support (i) mounted devices  78  and (ii) at least one additional vertically stacked rigid support structure  2   aa ,  2   bb  or other modular rigid support structure  2 . 
     The discussion below addresses a first anterior modular rigid support structure  2   a  within the preferred embodiment. However, the components, design and structure of first posterior and anterior modular support structures  2   a ,  2   b  are identical. The components, design and structure of other modular rigid support structures  2  in other embodiments is also identical to modular support structure  2   a . The vertical dimension  10   b  and depth  10   c  of modular rigid support structures  2  may vary in other embodiments, although (i) effective horizontal length  10   a  of each modular rigid support structure  2  is always preferably approximately nineteen inches, and (ii) total horizontal length  10   p  is preferably always approximately twenty-three inches. 
     a. Modular Rigid Support Structures  2  of Second Mount Rack Frame 
     Referring to  FIGS. 1 and 2  of the preferred embodiment, first anterior modular rigid support structure  2   a  comprises first rigid vertical component  3   a  and second rigid vertical component  3   aa  [generally rigid vertical components  3 ]. Rigid vertical components  3   a ,  3   aa  directly oppose each other at a 180-degree angle in an assembled rigid modular support structure  2   a ,  2   b , or any other modular rigid support structures  2 . 
     Vertical longitudinal height  10   b  of each vertical rigid component  3   a ,  3   aa  is approximately 49 inches. Each rigid vertical component  3   a ,  3   aa  has an anterior vertical width side  10   d  and a posterior vertical width side  10   dd  of preferably approximately two inches. Each vertical rigid component  3   a ,  3   b  has a first and second lateral vertical side  40   d ,  40   dd  respectively, and each lateral vertical side has depth  10   c  of approximately four and three-quarters inches. For first posterior modular rigid support structure  2   b , vertical height  10   b  of each first and second vertical rigid component  3   b ,  3   bb  is approximately thirty-nine inches. When assembled into modular rigid support structure  2  each rigid vertical support structure is perpendicular to flat support surface  480  and horizontal components  4 . 
     Each lateral vertical component side  40   d ,  40   dd  is perpendicular to, and integrally attached, to anterior or posterior rigid vertical component surfaces  10   d ,  10   dd  respectively. Each anterior width side  10   d  and posterior width sides  10   dd  comprise the same posterior side/anterior side/lateral side dimensions. Preferably each first rigid vertical component  3   a  is the same vertical height as second rigid vertical component  3   aa  within one assembled anterior rigid modular support structure  2   a . The same relationship is preferred for posterior vertical components  3   b ,  3   bb  or other embodiments. Referring to  FIG. 3  of the preferred embodiment, each lateral vertical side  40   d ,  40   dd  contains four round penetrating apertures  601   a ,  601   b ,  601   c ,  601   d  [generically round penetrating apertures  601 ]. Round penetrating apertures  601  linearly and vertically align with each other along lateral vertical side  40   d  or  40   dd . Referring to  FIGS. 1 and 4 , each rigid vertical component  3   a ,  3   aa ,  3   b ,  3   bb  comprises first and second vertical interior surfaces  35   a ,  35   b  respectively. Each vertical interior surface  35   a ,  35   b  is approximately three-quarters inch in width. 
     Preferably first anterior vertical rigid components  3   a ,  3   aa  are interchangeable with each other, while first posterior vertical rigid components  3   b ,  3   bb  are interchangeable with each other (assuming components  3   a ,  3   aa , or  3   b ,  3   bb  exhibit identical width and depth). Vertical rigid components  3   a ,  3   aa  may not be interchangeable with components  3   b ,  3   bb , if corresponding widths and depths diverge. Vertical rigid components  3   a ,  3   aa ,  3   b ,  3   bb  within their corresponding modular rigid support structures  2   a ,  2   b  respectively are aligned in a fixed, yet reversible mechanical manner. Each vertical rigid component  3   a ,  3   aa ,  3   b ,  3   bb  is positioned perpendicular to a flat supporting surface  480  as well as to (i) attaching straight base legs  471   a ,  471   b ; or (ii) attaching rack base legs  71   a ,  71   b  infra. 
     b. Rigid Horizontal Components  4   a ,  4   Aa,    
     Referring to  FIGS. 1 and 2  of the preferred embodiment of the second mount rack frame  1 , first anterior modular rigid support structure  2   a  also comprises first rigid horizontal component  4   a  and second rigid horizontal component  4   aa . Rigid horizontal components  4   a ,  4   aa  are parallel to each other within assembled rigid modular support structure  2   a ,  2   b , or other modular support structure  2 . Rigid horizontal components  4   a ,  4   aa , or those in other embodiments  4  are also parallel to the flat supporting surface  480  when assembled within rigid modular support structure  2   a ,  2   b  or other modular rigid support structure  2 . 
     Referring to  FIG. 1 , each first and second anterior rigid horizontal component  4   a ,  4   aa  respectively, as well as each anterior first and second posterior rigid horizontal component  4   b ,  4   bb  respectively, is approximately twenty-three and five-eighths inches in total length  10   a . The effective lateral horizontal length  10   a  is preferably nineteen inches, because nineteen inches is the industry standard lateral horizontal length  10   a  to accommodate a single U mounted device  78 . Each rigid horizontal component  4   a ,  4   aa , or  4   b ,  4   bb  is approximately four and seven-eighths inches in horizontal width  10   f . First and second anterior rigid horizontal components  4   a ,  4   aa  respectively are preferably parallel to each other when assembled into modular rigid support structure  2 . Similarly, first and second posterior rigid horizontal components  4   b ,  4   bb  respectively are parallel to each other when assembled into first posterior modular rigid support structure  2   b  or in other embodiments  2 . Each first and second horizontal rigid component  4   a ,  4   aa ,  4   b ,  4   bb  respectively is structurally and functionally interchangeable with the other. 
     Referring to  FIGS. 1 and 2 , at each horizontal rigid component end  19   a ,  19   b  is cut away section  19   c . One rigid vertical component end  15   a  or  15   b  inserts within a corresponding cutaway section  19   c . Each rigid horizontal component  4   a ,  4   aa ,  4   b ,  4   bb  also comprises a corresponding horizontal bottom side  13   a . Horizontal bottom side  13   a  integrally and continuously attaches perpendicular to first downward side  13   b  and second downward side  13   c . Each downward first and second downward side  13   b ,  13   c  respectively is approximately two inches in downward width  10   e.    
     Horizontal side  13   a  and downward sides  13   b ,  13   c  are preferably approximately 1/16 to 3/32 inch in thickness. Rigid vertical component ends  15   a ,  15   b  insert and slide in a limited manner along horizontal bottommost side  13   a  within corresponding cutaway section  19   c . Each rigid vertical component  3   a ,  3   aa  of first anterior modular rigid support structure  2   a  is reversibly removable from anterior horizontal rigid components  4   a ,  4   aa . Similarly, each rigid vertical component  3   b ,  3   bb  of first posterior modular rigid support structure  2   b  is reversibly removable from posterior horizontal rigid components  4   b ,  4   bb  respectively. In other embodiments rigid vertical components  3  are reversibly removable from corresponding horizontal rigid components  4 . 
     Anterior first and second rigid vertical components  3   a ,  3   aa  respectively are parallel to each other when assembled within first anterior modular rigid support structure  2   a . Anterior first and second rigid horizontal components  4   a ,  4   aa  respectively are parallel to each other and attach at a right angle to vertical rigid components  3   a ,  3   aa  respectively when assembled as first modular rigid support structure  2   a . Components  3   a ,  3   aa ,  4   a ,  4   aa  thereby preferably form a rectangle or square within one plane, as do components  3   b ,  3   bb ,  4   b ,  4   bb  in a posterior rigid modular support structure  2   b , or other embodiment of rigid modular support structures  2  with components  3 ,  4 . However, other four-sided polygons and other two-dimensional or three-dimensional shapes are also within the scope of the invention. 
     c. Partially Elliptical Apertures  17 , 17   a    
     Referring to  FIG. 5C , each rigid vertical component  3   a ,  3   aa , or  3   b ,  3   bb  contains vertically aligned aperture pairs  14   aa ,  14   bb ,  14   cc ,  14   dd  (generically vertical pairs  14   h ) of large partially elliptical apertures  17 . Vertical aperture pairs  14   h  are located within first and second vertical components end  15   a ,  15   b  along vertical sides  10   d , and  10   dd . As best seen in  FIG. 8A , in the preferred embodiment each large partially elliptical aperture  17  within aperture pairs  14   h  has an aperture longitudinal axis  14   e  perpendicular to vertical height  10   b  of corresponding rigid vertical component  3   a ,  3   b . Each large partially elliptical aperture  17  comprises midpoint  14   c  along aperture longitudinal axis length  14   e . Each large partially elliptical aperture  17  within vertical pair  14   h  is preferably approximately (i) seven-sixteenths inch in aperture longitudinal axis length  14   e  and (ii) one-quarter inch in aperture height  14   n . However, other aperture shapes and dimensions are also within the scope of the invention. 
     Each large partially elliptical aperture  17  provides a lateral clearance of 1/16 inch on each side of an inserted bolt  50   x . Each large partial elliptical aperture  17  is designed to reversibly receive one threaded bolt  50   x . Threaded bolt  50   x  preferably has a maximum hexagonal head dimension of five-eighths inch, a threaded stem with mated hex nut (not seen) and a washer (not seen). Threaded stem is approximately one-quarter inch in diameter and three-quarters inch in length. There is a maximum lateral clearance of approximately 1/16-inch on each side of a centrally positioned threaded bolt  50   x  along aperture long axis  14   e . There is also a maximum lateral clearance of approximately 1/16 inch on each side of a centrally positioned large round threaded screw  50   a  within smaller partially elliptical aperture  17   a , or in other embodiments. Preferably large round threaded screw  50   a  has a diameter of approximately one-half inch and a stem diameter of approximately three-sixteenths inch and includes a circular washer (not seen). 
     Vertical aperture pairs  14   h  ( 4   aa ,  14   bb ,  14   cc ,  14   dd ) are positioned at rigid vertical component ends  15   a ,  15   b  within corresponding first and second rigid vertical component anterior and posterior vertical sides  10   c ,  10   d  respectively. Two partially elliptical apertures  17  within each pair  14   h  align directly above or below each other within corresponding anterior vertical side  10   d  or posterior vertical side  10   dd . Still referring to  FIG. 5C , each rigid horizontal component  4   a ,  4   aa ,  4   b ,  4   bb , or other rigid horizontal components  4  in other embodiments, comprises first, second, third and fourth horizontal aperture pairs  14   a ,  14   b ,  14   c ,  14   d  respectively (generically horizontal aperture pairs  14 ). Each horizontal aperture pair  14  is located at first and second horizontal component ends  19   a ,  19   b  respectively, within first and second horizontal downward sides  13   b  and  13   c  respectively. Each horizontal aperture pair  14  comprises two large partially elliptical apertures  17 . 
     Each large partially elliptical aperture  17  within a horizontal pair  14   a ,  14   b ,  14   c ,  14   d  (generically horizontal pairs  14 ) is identical in shape and dimension to large partially elliptical apertures  17  within vertical pairs  14   h . Each aperture long axis  14   e  within aperture pairs  14  is parallel to the effective longitudinal length  10   a  of its corresponding rigid horizontal component  4 . Within an assembled modular rigid support structure  2   a ,  2   b  or other structures  2 , each horizontal aperture pair  14  congruently aligns with corresponding vertical aperture pair  14   h , i.e.:  14   a ,  14   aa ,  14   b ,  14   bb , etc. 
     Still referring to  FIG. 5C , in the preferred embodiment first, second, third, fourth and fifth horizontal pairs  16   a ,  16   b ,  16   c ,  16   d , and  16   e  respectively (generically laterally aligned pairs  16 ) of smaller partially elliptical apertures  17   a  penetrate horizontal central side  13   a . Each smaller partially elliptical aperture  17   a  is identical in design and shape to large partially elliptical aperture  17 , so that each smaller partially elliptical aperture  17   a  has an aperture midpoint  14   c  and an aperture height  14   n  (not seen). Each large partially elliptical aperture  17  also has an aperture longitudinal axis  14   e  (not seen) perpendicular to longitudinal vertical height  10   b  of corresponding rigid vertical component  3   a ,  3   b  or  3 . 
     Horizontally aligned pairs  16  are equidistantly spaced from each other and are parallel to each other. Other numbers of laterally aligned pairs  16  containing smaller partially elliptical apertures  17   a  are also within the scope of the invention. In other embodiments of the second mount rack frame horizontally aligned pairs  16  and apertures  17   a  comprise diverse shapes and dimensions, as well as other linear distances between each adjacent apertures or aperture pairs. Preferably adjoining laterally aligned pairs  16  each lie approximately (i) four inches from each other, and (ii) one and one-quarter inches from each first and second rigid horizontal component longitudinal edges  13   h ,  13   g  respectively (measured from the closest smaller partially elliptical aperture  17   a  to longitudinal edge  13   h ,  13   g ). Each laterally aligned pair  16  is parallel to, and linearly aligned with, remaining laterally aligned pairs  16  within horizontal central side  13   a.    
     Referring now to  FIG. 7 , one large round screw  50   a  inserts within each corresponding smaller partially elliptical aperture  17   a  of laterally aligned pairs  16 . There is a maximum lateral clearance of approximately 1/16-inch along aperture longitudinal axis  14   e  on each side of a centrally positioned large round screw  50   a  within smaller partially elliptical aperture  17   a . Referring again to  FIG. 5C , in the preferred embodiment first and second square vertical aperture sets  18   a , 18   b  respectively (generically square vertical sets  18 ) each comprise four large partially elliptical apertures  17 . Each large partially elliptical aperture longitudinal axis  14   e  is perpendicular to longitudinal vertical length  10   b  of corresponding rigid vertical component  3 . 
     Each square vertical aperture set  18   a ,  18   b  is located within a rigid vertical component end  15   a ,  15   b  along a corresponding first or second lateral vertical component side  40   d ,  40   dd . Within each square set  18 , four large partially elliptical apertures  17  form a square within a corresponding lateral vertical component side  40   d ,  40   dd . However, other numbers or shapes of large partially elliptical apertures  17  are also within the scope of the invention. One threaded bolt  50   x  inserts into two aligned elliptical apertures  17  whenever square set  18  congruently aligns with corresponding partially elliptical aperture  17   a  in other components. Square sets  18   a ,  18   b  have three functions: (i) insertion points for threaded bolts  50   x  which attach flat rigid connector plates  90  to vertical rigid components  3  infra; (ii) attachment of anterior and posterior modular rigid support structures  2   a ,  2   b  respectively to first and second straight base legs  471   a ,  471   b  respectively; and (iii) attachment of first anterior and posterior second modular rigid support structures  2   a ,  2   b  respectively to first and second rack base legs  71   a ,  71   b  respectively. 
     d. Stamped Metal Strips  36   a ,  36   b    
     Referring to  FIG. 1  of the preferred embodiment, each rigid vertical component  3   a ,  3   aa ,  3   b ,  3   bb , or other  3 , comprises one stamped pair  37  of first and second stamped metal strips  36   a ,  36   b  respectively (generically stamped metal strips  36 ). Each first and second stamped metal strip  36   a ,  36   b  respectively preferably integrally attaches to first and second interior vertical component surfaces  35   a  and  35   b  respectively. 
     First and second stamped metal strips  36   a ,  36   b  respectively are parallel to each other along longitudinal vertical length  10   b  of corresponding rigid vertical component  3   a ,  3   aa ,  3   b ,  3   bb ,  3 . Stamped metal strips  36   a ,  36   b  are preferably approximately three inches apart from each other along their entire longitudinal vertical lengths  10   b . First stamped metal strip  36   a  is preferably approximately three-quarters inch from rigid vertical component edge  35   a  in an anterior/posterior direction. Similarly, second stamped metal strip  36   b  is approximately three-quarters inch from rigid vertical component edge  35   b  in an anterior/posterior direction. Each stamped metal strip  36   a ,  36   b  is preferably approximately 1/16 to 3/32 inch in thickness. First and second stamped interior edges  36   c ,  36   d  respectively preferably integrally attach to corresponding first and second interior vertical component surfaces  35   a ,  35   b  respectively. Each stamped metal strip  36   a ,  36   b  protrudes from, and is perpendicular to, corresponding vertical segment surface  35   a  or  35   b . Each vertical interior surface  35   a ,  35   b  is perpendicular to its corresponding crimped metal strip  36   a ,  36   b  which attaches thereto. 
     Still referring to  FIG. 1 , each first and second stamped metal strip  36   a ,  36   b  respectively also comprises a first or second exterior edge  36   aa ,  36   bb  respectively. Preferably stamped metal strips  36   a ,  36   b  are identical in design and structure. Preferably, stamped metal strips  36   a ,  36   b  are also interchangeable with respect to attachment to rigid vertical component  3   a  and  3   aa ,  3   b ,  3   bb  or  3  whenever rigid vertical components  3  are the same longitudinal vertical height  10   b . However, vertical height, width and thickness of stamped metal strips  36  in other embodiments may differ. Referring to  FIG. 5C , each stamped pair  37   a  is parallel to and aligned with its opposing stamped pair  37   b  along its opposing rigid vertical component  3   a ,  3   aa  or  3   b ,  3   bb  within an assembled first anterior or first posterior modular rigid support structures  2   a ,  2   b . Stamped metal strips  36   a ,  36   b  are also parallel to longitudinal length  10   b  of corresponding rigid vertical component  3   a ,  3   aa  or  3   b ,  3   bb  to which stamped metal strip  36   a ,  36   b  attaches. 
     Each first stamped metal strip  36   a  is preferably approximately three inches anterior to second stamped metal strip  36   b . Each stamped metal strip  36   a ,  36   b  is preferably identical in structure, design and function to the other. However, stamped metal strip vertical dimensions may vary in other embodiments. In the preferred embodiment, each stamped metal strip  36   a ,  36   b  within first anterior modular rigid support structure  2   a  is approximately fifty-two inches in vertical longitudinal height  10   b  and approximately one inch in horizontal width. Each stamped metal strip  36   a ,  36   b  within first posterior modular rigid support structure  2   b  is preferably approximately thirty-nine inches in vertical longitudinal height and approximately one inch in horizontal width. Other vertical longitudinal lengths  10   b  of appropriate U size are satisfactory within additional embodiments. 
     Referring now to  FIGS. 1 and 5C , within each first and second stamped metal strip  36   a ,  36   b  respectively are rack sets  7 . Each rack set  7  comprises three linearly and vertically aligned rack apertures  8  proximal to corresponding first and second exterior stamped edge  36   aa  or  36   bb  respectively. Each rack aperture  8  is square and each of rack aperture&#39;s four sides is approximately three-eighths inch in length. 
     In the preferred embodiment there are twenty-six aligned rack sets  7  within each stamped rack metal strip  36   a ,  36   b  of anterior rigid vertical components  3   a , and  3   aa . Also in the preferred embodiment, there are twenty-one aligned rack sets  7  within each stamped rack metal strip  36   a ,  36   b  of posterior rigid vertical components  3   b , and  3   bb . Each aligned rack set  7  is preferably approximately one and three-quarters inches in vertical height, for consistency with the international standard U vertical unit which is exactly one and three-quarters height. However, other numbers of racks sets  7  are also within the scope of the invention. Each centrally positioned rack aperture  8  is preferably approximately five-eighths inch from adjacent rack apertures  8  within its respective rack set  7 . There is preferably approximately one-eighth inch vertically between consecutive rack sets  7 . 
     e. Mounted Device  78  Attachment Structures 
     Mounted devices  78  mounted and stored upon second modular mount rack frame  1  are generally, but not exclusively, computer-related and include, although not exclusively: servers, hubs, switches and routers. Similarly to modular rigid support structures  2 , mounted devices  78  are categorized within internationally designated U units. Mounted device  78  of one U unit is approximately (i) nineteen inches in anterior length and (ii) one and three-quarter inches in vertical height, although depth may vary. Because the international standard height U is 1 and ¾ inches, most manufacturers design their devices  78  and attaching brackets  75  accordingly. Each one U device  78  is approximately 1 and 11/16 inches in height. Consequently, when devices  78  are mounted upon a modular rigid support structure(s)  2 , there is approximately 1/32 inch of vertical space between vertically aligned adjacent devices  78  within a modular rigid support structure  2 . 
     As best seen in  FIGS. 2 and 4 , smaller lighter computer-related mounted devices  78   i  only require two anterior mechanical attachments to stamped metal strips  36   a ,  36   b  of two opposing rigid vertical components  3   a ,  3   aa  or  3   b ,  3   bb . Opposing two anterior mechanical attachments are sufficient to support the weight of a hub, switch or router  78   i . Referring to  FIG. 6 , larger computer related devices  78   t  such as servers require: (i) two opposing points along each anterior device segment  555  of each opposing device side  78   a ,  78   b  respectively; and (ii) two opposing points along each first and second posterior segment portion  556  of each opposing device side  78   a ,  78   b  respectively. 
     In another embodiment, computer related devices  78   i  mount to a sole and only rigid modular support structure  2  within second modular mount rack frame  1 . This embodiment requires that one modular rigid support structure  2   a ,  2   b , or other modular rigid support structure  2 , attach solely and exclusively to first and second rack base legs  7   a ,  71   b . Also in this embodiment, there can only be two anterior attachments at anterior opposing segments  555  of a smaller computer related device  78   i.    
     Referring to  FIG. 6 , prior art mounting bracket  75  reversibly attaches to mounted device  78   i  by countersink or bevel head screws  50   g . Screws  50   g  are preferred because they fit flush along a bracket surface. However, other prior art mounting brackets  75 , screws and mechanical attachments are satisfactory in other embodiments. Both anterior device side segments  555  of opposing device sides  78   a ,  78   b  extend posterior from anterior device edge  557  in an anterior-posterior dimension  78   f . First, second and third mounting aperture pairs  53   a ,  53   b ,  53   c  (generically mounting aperture pairs  53 ) each comprise vertically aligned mounting round apertures  51   a . Each mounting aperture pair  53  linearly aligns with remaining pairs  53  along each opposing first and second device sides  78   a ,  78   b  (not seen in this view) in anterior/posterior direction  78   f . Each mounting aperture pair  53  aligns parallel to posterior device edge  557 . Each mounting aperture pair  53  reversibly receives one countersink or bevel head screw  50   g  within each mounting pair&#39;s corresponding mounting round aperture  51   a.    
     There is approximately one to five inches between anterior mounting aperture pairs  53   a ,  53   b  and one to five inches between mounting aperture pairs  53   b  and  53   c . Mounting pair  53   a  is approximately one to five inches from anterior edge  557 , while mounting aperture pair  53   c  is approximately one to five inches from posterior device edge. Still referring to  FIG. 6 , in the preferred embodiment each prior art mounting bracket  75  preferably comprises flat bracket end  75   a , bracket flat segment  75   d , and bent bracket end  75   b . Flat bracket segment  75   d  comprises flat end apertures  75   c , and each flat end aperture  75   c  can congruently align with a corresponding mounting round aperture  51   a . Bent bracket end  75   b  is integrally part of, but perpendicular to bracket flat segment  75   d . Bent bracket end  75   b  comprises bent bracket apertures  75   e , through which preferably large round Phillips head or straight head screw  50   k  insert. 
     Prior art cage nut  59  comprises first and second opposing crimped flanges  59   a ,  59   b , a square configuration and centrally positioned threaded round cage aperture  59   c . Cage nut  59  is approximately ⅜ inch in length upon on each side. Cage nut  59  inserts within a single rack aperture  8  and is held therein by opposing protruding first and second cage flanges  59   a ,  59   b  respectively. One round threaded screw  50   b  inserts within each threaded round cage aperture  59   c  and congruently aligned bent rack apertures  75   e , thereby connecting attaching stamped metal strip  36   a  or  36   b  to bent bracket end  75   b.    
     To attach mounted device  75   i  at two anterior points to mounting bracket  75 , one counter-sink or beveled head small round screw  50   g  inserts through 
     (i) each of two mounting round apertures  51   a  of a pre-selected mounting aperture pair  53   a  or  53   b  to congruently align with; 
     (ii) each of one of two flat end apertures  75   c;    
     (iii) for a total of two counter sink or beveled round head screws  50   g  attaching mounted device  78  to mounting bracket  75  (mounting bracket  75  in turn being connected to stamped metal strip  36   a ,  36   b  by bent bracket end  75   b , screws  50   k  and cage nuts  59 ).  FIGS. 4 and 6 . 
     For the above described two-point attachment, one anterior aperture pair  53   a  or  53   b  is selected, with that aperture pair  53   a ,  53   b  being the same opposing aperture pair on each opposing device side  78   a ,  78   b . With four-point attachment, opposing anterior two point attachment is identical, with addition to two point attachments at aperture pair  53   c . For posterior attachment at posterior aperture pairs  53   c , brackets  75  and cage nuts  59  attach to device  78  and stamped metal strip  36   a ,  36   b  in a manner identical to two-point attachment of anterior aperture pairs  53   a  or  53   b . Please see  FIGS. 2 and 6 . 
     f. Power Strip  600   
     Referring to  FIG. 3  of the preferred embodiment, prior art electrical power strip  600  facilitates operation of mounted device  78  (not seen in this view) without removal of devices  78  from second modular mount rack frame  1 . Power strip  600  reversibly attaches to one rigid vertical component  3  with small round screws  50   a . Power strip  600  is preferably approximately nineteen inches in longitudinal length, one and three-quarters inches in width, and one and three-eight inch in depth. Power strip  600  preferably attaches to first or second lateral vertical component side  40   d , 40   dd  respectively by screws  50   a  and four round penetrating apertures  601   a ,  601   b ,  601   c ,  601   d  within each rigid vertical component  3 . Small round penetrating apertures  601  are linearly and vertically aligned along longitudinal midline  602  of lateral vertical component side  40   d  or  40   dd.    
     Within fully assembled preferred second modular mount rack frame  1 , uppermost round penetrating aperture  601   a  is preferably approximately 47 inches from flat supporting surface  480 . Second lower round penetrating aperture  601   b  is approximately 28.5 inches from supporting surface  480 . Third lower round penetrating aperture  601   c  is approximately 24 inches from surface  480 , while fourth lowest round penetrating aperture  601   d  is approximately six inches from supporting surface  480 . Vertical distance of power strip  600  from flat supporting surface  480  along a corresponding vertical rigid component  3  is adjustable by inserting small round screws  50   a  into upper or lower small round penetrating apertures  601   a ,  601   b ,  601   c ,  601   d.    
     As seen in  FIG. 3 , power strip  600  is parallel to, immediately contacts and adjoins rigid vertical component  3   aa  to which it mechanically attaches. Other positions and locations of electrical power strip  600  are also within the scope of the invention. For example, power strip end  600   a  can attach to a rigid vertical component  3  at right angles to longitudinal vertical length  10   b . In other embodiments power strip ends  600   a ,  600   b  attach to first and second opposing stamped metal strips  36   a ,  36   a , in this last embodiment power strip  600  is parallel to assembled rigid horizontal components  4   a  (not seen in this view) and  4   aa.    
     g. Straight Rack Base Legs  471   a ,  471   b    
     Referring to  FIGS. 1, 2, 3 and 5B  of the preferred embodiment of second modular mount rack frame  1  preferably comprises a first straight base leg  471   a  and a second straight base leg  471   b . Each straight base leg  471   a ,  471   b  is approximately (i) thirty inches in maximum longitudinal length along straight leg bottom edge  471 ; and (ii) two and three-quarters inches in straight leg width. However, the longitudinal length of each straight rack base leg  471   a ,  271   b  may range between approximately thirty and thirty-three inches and remain satisfactory for its free standing and load bearing utilities. Each straight base leg  471   a ,  471   b  is made of flat metal which is approximately one-sixteenth inch in thickness. 
     Referring to  FIGS. 1 and 2  of the preferred embodiment of the second mount rack frame  1  each first straight base leg  471   a  preferably directly opposes second straight base leg  471   b  at a one hundred and eighty-degree angle. First straight base leg  471   a  lies in the same plane as second straight base leg  471   b  when assembled within second modular mount rack frame  1 . First straight base leg  471   a  is also the same vertical distance above flat horizontal supporting surface  480  as is second straight base leg  471   b  when assembled as second modular mount rack frame  1 . Each straight base leg  471   a ,  471   b  is parallel to the other in an anterior/posterior direction. Each straight base leg  471   a ,  471   b  aligns perpendicular to corresponding attached rigid vertical component  3 , and each straight base leg  471   a ,  471   b  is structurally and functionally identical to the other. As best seen in  FIG. 5B , each straight base leg  471   a ,  471   b  has an inner leg edge  471   d  and an outer leg edge  471   e . Each inner leg edge  471   d  comprises inner longitudinal leg ledge  400   f  with protruding ledge inner lip  471   ff.    
     Referring to  FIG. 5B , inner longitudinal leg ledge  400   f  is approximately three-quarters inch in height and perpendicular to lower base leg side  400   g . Protruding ledge inner lip  471   ff  is approximately three-quarters inch in width and perpendicular to inner longitudinal leg ledge  400   f . These features are identical to those of the preferred embodiment of  FIG. 1 . Protruding ledge inner lip  471   ff  and inner longitudinal leg ledge  400   f  is integrally part of and coextensive with straight base leg  471   a  or  471   b.    
     Each protruding ledge inner lip  471   ff  comprises a first leg threaded aperture pair  402   a  and a second leg threaded aperture pair  402   b . First leg threaded aperture pair  402   a  is positioned at anterior straight base leg end  400   h , while second leg threaded aperture pair  402   b  is positioned at posterior straight base end  400   hh . Leg threaded aperture pairs  402   a ,  402   b  each comprise two smaller rounded threaded apertures  17   b . Smaller round threaded apertures  17   b  reversibly receive threaded round screws  50   a  which attach straight base legs  471   a ,  471   b  to smaller partially elliptical apertures  17   a  (not seen in this view) of horizontal aperture pair  16   a  or  16   e . These features are identical to those attachment features of the preferred embodiment in  FIG. 1 . 
     As best seen in  FIG. 3  and  FIG. 5B , outer leg edge  471   e  comprises upper outer leg wall  400   j . Upper outer leg wall  400   j  is approximately four inches in height, and wall  400   j  protrudes upwardly and perpendicular to straight leg lowest side  400   g . Upper outer leg wall  400   j  comprises two first and second wall aperture sets  400   k ,  400   kk , and each wall aperture set  400   k ,  400   kk  containing four large partially elliptical apertures  17 . Wall sets  400   k ,  400   kk  respectively each form a square at first and second straight base leg ends  400   h ,  400   hh  respectively for a total of eight large partially elliptical apertures  17 . Referring to  FIGS. 2 and 3  of the preferred embodiment, upper outer leg wall  400   j  is co-extensive and integral with straight base leg  471   a  or  471   b . Upper leg wall  400   j  contains upper leg wall ledge  400   jj , and ledge  400   jj  protrudes in a perpendicular and interior direction to upper leg wall  400   j . Each upper leg wall ledge  400   jj  is approximately three-quarters inch in width and comprises downward protruding interior side  400   q  as seen in  FIG. 1 . Downward protruding interior side  400   q  is approximately three-eighths inch in width. 
     Referring to  FIG. 5B , each straight base leg lowest side  400   g  comprises first, second and third track sets  403   a ,  403   b , and  403   c  respectively of small round track apertures  404  (generically track sets  403 ). Each track set  403  forms a square configuration of four small round track apertures  404 . Each small round track aperture  404  is adapted to receive a small diameter round head screw  50   a  for attachment of a coaster or wheel  470   a ,  470   b  to straight leg lower track  400   g . Each small round track aperture  404  is approximately one-quarter inch in diameter. First track set  403   a  is aligned with remaining tracks sets  403   b ,  403   c , and set  403   a  lies within straight base leg lowest side  400   g  at straight leg slanted anterior end  400   h . Second track set  403   b  lies within straight base leg lowest side  400   g  at the longitudinal midpoint of each straight base leg  471   a ,  471   b , and third track set  404   c  is located at straight leg posterior end  400   hh . Implementation of six castors or wheels  470  with a straight rack base leg of between approximately thirty inches and thirty-three inches in longitudinal length will support a maximum load of 1, 320 pounds. 
     Referring to  FIGS. 1, 3 and 5B , each first straight leg anterior end  400   h  of straight base legs  471   a ,  471   b  respectively comprise a first or second slanted lip  400   s ,  400   t  respectively. Each first or second slanted lip  400   s ,  400   t  respectively integrally attaches to corresponding first and second slanted outer edge  471   e ,  471   ee  respectively. Each slanted lip  400   s ,  400   t  comprises a trapezoidal shape which is: one inch in length on each lateral trapezoidal side, three inches in length on its upper trapezoidal side, and four inches on its lower trapezoidal side. Each slanted lip  400   s ,  400   t  protrudes downward and interiorly from slanted outer edges  471   e ,  471   ee  at an angle of approximately 70 degrees. 
     Each first and second vertical rigid component  3   a ,  3   aa  respectively, of first anterior rigid support structure  2   a , attaches approximately three inches from corresponding straight leg anterior end  400   h  of first straight base leg  471   a  and second straight leg anterior end  400   h  of second straight base leg  471   b  respectively. Each first and second vertical rigid component  3   b ,  3   bb  respectively, of second rigid modular support structure  2   b , is flush with corresponding posterior base leg end  400   hh  of first straight base leg  471   a  or corresponding posterior base leg end  400   hh  of second straight base leg  471   b.    
     Referring to  FIGS. 1, 2 and 3 , along lowest leg surface  400   p  of each straight base leg  471   a ,  471   b  are prior art first, second, third and fourth coasters or wheels  470   a ,  470   b ,  470   c ,  470   d  [generally coasters or wheels  470 ]. Coasters or wheels  470  mechanically attach to lowest leg surface  400   p  in a conventional manner at anterior straight base leg ends  400   h  and posterior straight base leg ends  400   hh . With coasters or wheels  470 , second modular mount rack frame  1  rolls easily along a flat horizontal supporting surface  480  such as a floor. Prior art locks  479  prevent second modular mount rack frame  1  from inadvertent movement. Round screws  50   b  with washers are preferred for wheel or coaster attachments  481  to straight track aperture track sets  403 . 
     h. Vertically Aligned Modular Multi-Component Rigid Support Structures  2   
     Referring to  FIG. 5B  another embodiment of second mount rack frame  1  comprises first anterior modular rigid support structure  2   a , first posterior multi-component modular rigid support structure  2   b  and uppermost second posterior modular rigid support structure  2   bb . First and second posterior modular rigid support structures  2   b ,  2   bb  respectively are vertically attached and aligned to each other, so lower first modular rigid structure  2   b  supports upper second modular rigid support structure  2   bb  upon straight rack base legs  471   a ,  471   b . Mounted devices  78  vertically align and attach to rigid vertical components  3   a ,  3   aa  as described supra for the preferred embodiment of second mount rack frame  1 . 
     Because of modular design, in other embodiments second posterior modular rigid support structure  2   bb  can also function as, but not exclusively (i) first anterior modular support structure  2   a ; (ii) second anterior modular rigid support structure  2   aa ; (iii) first posterior modular rigid support structure  2   b ; or (iii) other modular rigid support structure  2 . In this embodiment, second posterior modular rigid support structure  2   bb  provides an upper modular unit which increases storage capacity without additional floor space. Still referring to  FIG. 5B , in this embodiment first anterior modular rigid support structure  2   a  is approximately fifty-three inches in height; first posterior modular rigid support structure  2   b  is approximately thirty-nine inches in height; and second posterior modular rigid support structure  2   bb  is approximately seventeen and one-half inches in height. In other embodiments longitudinal vertical heights  10   b  of vertical rigid components  3  may vary as does depth of modular rigid support structures  2 . 
     In other embodiments second mount rack frame  1  comprises vertically aligned first anterior modular rigid support structure  2   a , second anterior modular rigid support structure  2   aa , and first posterior modular rigid support structure  2   b . In another permutation of a vertically modified second mount rack frame  1  ( i ) first anterior modular rigid support structure  2   a  attaches upper second anterior modular rigid support structure  2   aa , while (ii) first posterior modular rigid support structure  2   b  attaches vertically aligned upper second posterior modular rigid support structure  2   bb . Attached modular rigid support structures  2   aa ,  2   bb  can be of diverse vertical heights but the effective lateral horizontal dimension  10   aa  of rigid horizontal components  4  is always nineteen inches. Each modular rigid support structure  2   aa ,  2   bb  is identical in structure and design to modular rigid support structures  2   a ,  2   b , as well as other modular rigid support structures  2 . 
     Second Embodiment of Second Modular Mount Rack Frame  1   
     Referring to  FIGS. 4, 5A and 7 , the second embodiment of second modular mount frame  1  comprises (i) sole and only first anterior modular rigid support structure  2   a ; or (ii) sole and only first one posterior modular rigid support structure  2   b ; or another sole and only modular rigid support structure  2 . In other embodiments there is vertical stacking of an uppermost additional modular rigid support structure  2   aa ,  2   bb  or  2  upon sole and single supporting modular rigid support structure  2 . 
     Still referring to  FIGS. 4 and 5A , removable first and second rack base legs  71   a ,  71   b  respectively substitute for straight base legs  471   a ,  471   b  of the preferred embodiment and other embodiments of second mount rack frame  1 . Each first and second rack base leg  71   a ,  71   b  respectively preferably comprises first, second, third and fourth rack coasters or wheels  70   a ,  70   b ,  70   c ;  70   d  (generically rack coasters or wheels  70 ). Preferably prior art first and second rack coasters or wheels  70  attach to anterior and posterior rack base leg ends  71   aa ,  71   bb ,  71   cc ,  71   dd  respectively in a manner well known in the art. Each rack coaster or wheel  70  comprises a corresponding prior art lock  79 . Prior art locks  79  prevent second modular mount rack frame  1  from inadvertent swiveling along flat supporting surface  480 . Each prior art wheel attachment  51   b  comprises small round apertures  51   bb  so each attachment  51   b  mechanically connects to first track set  403   a  by small round screws  50   b.    
     Still referring to  FIGS. 4 and 5A , one rack leg square set  900  penetrates each exterior upper slanted leg side  73   d  of each corresponding rack base leg  71   a ,  71   b  below each rack base leg maximum height  777 . Each rack leg square set  900  comprises four rack large partially elliptical apertures  81   a ,  81   b ,  81   c ,  81   d  (generally rack large partially elliptical apertures  81 ] positioned within square configuration. Each rack large partially elliptical aperture  81  is identical in dimension and shape to large partially elliptical aperture  17 . Each rack large partially elliptical aperture  81  respective longitudinal length  10   e  is parallel to the corresponding longitudinal length of rack base legs  71   a ,  71   b . Threaded bolts  50   x  attach respective rack base legs  71   a ,  71   b  to each congruently aligned vertical square set  18  through congruently aligned rack leg square sets  900 . Other mechanical fasteners are satisfactory in alternative embodiments. 
     Each first and second rack base leg  71   a ,  71   b  respectively comprises interior flat lowest side  73   c , exterior upper slanted side  73   d , and rack base leg interior side  70   e . Each rack base leg  71   a ,  71   b  is preferably approximately twenty inches in length in an anterior/posterior direction, and two and three-quarters inches in width. Each rack base leg  71   a ,  71   b  is approximately two and one-half inches in height where upwardly slanted side  73   d  attaches to each corresponding vertical component end  15   a  or  15   b . Each exterior upper slanted side  73   d  is preferably approximately one and one-half inches in height at anterior leg end  71   aa ,  71   bb  and posterior leg end  71   cc ,  71   dd.    
     Still referring to  FIGS. 4 and 5A , flat interior lower side  73   c  is uniformly approximately three-quarters inch in height and comprises protruding ledge  73   t . Protruding ledge  73   t  is perpendicular to flat lower side  73   c  and is approximately three-quarters inches in width. Protruding ledge  73   t  contains anterior and posterior threaded round apertures  778   a ,  778   b  respectively. Anterior and posterior threaded round apertures  778   a ,  778   b  are approximately two and one-quarter inches apart. Anterior threaded round aperture  778   a  is approximately six and one-quarter inch from anterior rack base leg end  71   aa  or  71   bb . Threaded round apertures  778   a ,  778   b  congruently align with aperture pairs  16   a ,  16   e  for insertion of round screws  50   a.    
     Each rack base leg  71   a ,  71   b  aligns perpendicular to corresponding attached modular rigid support structure  2   a ,  2   b  or  2 . Preferably each rack base leg  71   a ,  71   b  is structurally and functionally identical to the other, except that one leg  71   a  is oriented for use as a left leg and one leg  71   b  is oriented for use as a right leg. Each rack base leg  71   a ,  71   b  preferably consists of a single metal sheet which is approximately one-sixteenth inch in thickness. Each single metal sheet bends at a right angle to form lower rack base side  70   e , as well as exterior and interior sides  73   c ,  73   d . Rack base legs  71   a ,  71   b  are preferred in embodiments in which there is only (i) a single first modular rigid support structure  2   a ,  2   b ,  2  or (ii) a single first modular rigid support structure  2   a ,  2   b ,  2  with a vertically aligned and vertically attaching second modular rigid support structure  2   a ,  2   b  or  2 . In this embodiment preferably each first and second rack base leg  71   a ,  71   b  respectively attaches to corresponding vertical rigid component end  15   a  approximately three inches posterior to corresponding anterior rack base leg end  71   aa.    
     i. Rigid Flat Connecting Plates  90   
     Still referring to  FIG. 5B , second mount rack frame  1  preferably comprises at least one first rigid flat connecting plate  90   a  and at least one second rigid flat connecting plate  90   b  for additional mechanical stability and rigidity [generically rigid flat connecting plates  90 ]. Each rigid flat connecting plate  90  is preferably structurally and functionally identical to the other with the same length, width and thickness. Preferably rigid flat connecting plates  90  are rectangular, but other shapes and dimensions are satisfactory in other embodiments. 
     Preferably each rigid flat connecting plate  90  is approximately six inches in length, four and five-eighths inches in width and one-sixteenth inch in thickness. Each rigid flat connecting plate  90  preferably comprises large partially elliptical plate apertures  92   a ,  92   b ,  92   c ,  92   d ,  92   e ,  92   f ,  92   g  and  92   h  (generically plate apertures  92 ). Plate apertures  92  form two linearly aligned sets of four apertures  92  at each adjacent first and second opposing plate edges  93   a ,  93   b  respectively:  92   a ,  92   b ,  92   c ,  92   d  respectively; and  92   e ,  92   f ,  92   g ,  92   h  respectively. However, other numbers and positions of plate apertures  92  are also satisfactory. Preferably each plate aperture  92 , as measured from each plate aperture center  92   j , lies approximately five-eighths inch from the first or second corresponding longitudinal opposing plate edge  93   a  or  93   b . Interior positioned plate apertures  92   b ,  92   c  are one and one-quarter inch apart from each other, as are interiorly positioned plate apertures  92   f ,  92   g . Distal positioned plate apertures  92   a ,  92   d  and  92   e ,  92   h  are one and three-quarters inches from each other. Each plate aperture  92  is preferably identical to large partially elliptical aperture  17  in dimensions and shape. 
     Still referring to  FIG. 5B , plate apertures  92  congruently align with corresponding horizontally aligned large partially elliptical apertures  17  within two square sets  18  of a lateral vertical component side  40   d  or  40   dd . Congruently aligned large partially elliptical apertures  17  and plate apertures  92  thereby mechanically attach two adjoining rigid vertical components  3   a ,  3   aa ,  3   b ,  3   bb , or other components  3  with bolts  50   x , to form a stable continuous vertical structure. Also as seen in  FIG. 5B , horizontal aperture pairs  16  within upper positioned rigid horizontal component  4   aa  to congruently align with their spatial counterparts within lower rigid horizontal component  4   a . One screw  50   a  inserts though each of congruently aligned horizontal aperture pairs  16   a ,  16   b ,  16   c ,  16   d , and  16   e  within both rigid horizontal components  4   a ,  4   aa  to mechanically attach two vertically aligned modular rigid support structures  2  to each other. Each flat connecting plate  90  structurally attaches to interchangeably attaching vertically aligned rigid vertical component ends  15   a , 15   b  of rigid vertical components  3   a ,  3   b  as described supra for embodiments of second mount rack frame  1 . 
     Referring to  FIG. 7 , a fourth embodiment of second mount rack frame  1  comprises first anterior modular rigid support structure  2   a  and upper vertically positioned second anterior modular rigid support structure  2   aa . Attachment of flat rigid connecting plates  90   a ,  90   b  is identical in third and fourth embodiments, as well as in other embodiments. Attachment by congruently aligned horizontal aperture pairs  16  and screws  50  of connecting plates  90   a    90   b  is identical to that described supra for other embodiments of the second modular mount rack frame. 
     Best Mode and Preferred Assembly of One Modular Rigid Multi-Component Support Structure  2  for Second Modular Mount Rack Frame  1   
     In the best mode, the assembly of modular rigid support structures  2   a ,  2   aa ,  2   b  and  2   bb  is identical for other modular rigid support structures  2 . For illustration purposes the following example primarily describes assembly of first anterior modular rigid support structure  2   a . Referring to  FIG. 5C , the operator initially selects a first rigid vertical component  3   a  and a first rigid horizontal component  4   a . He or she next inserts one vertical component end  15   a  of first rigid vertical component  3   a  within corresponding cut-out segment  19   c  of first rigid horizontal component  4   a . He or she then inserts one threaded bolt  50   x  through each of two congruently aligned horizontal large partially elliptical apertures  17  within each aperture pair  14   aa / 14   a  and  14   b / 14   bb . This procedure results in the attachment of one rigid vertical component end  15   a  to one rigid horizontal component end  19   a  at location A. 
     The operator next inserts one end  15   a  of second rigid vertical component  3   aa  within corresponding cutout  19   c  of second horizontal component end  19   b  of first rigid horizontal component  4   a . He or she congruently aligns each of two large partially elliptical apertures  17  of aperture pairs  14   a / 14   aa  and  14   b / 14   bb  in an identical manner to that described immediately supra. The operator inserts and tightens one threaded bolt  50   x  through each two congruently aligned large partially elliptical apertures  17  of horizontal and vertical aperture pair&#39;s  14   a / 14   aa  and  14   b / 14   bb . This procedure attaches one vertical component end  15   a  to one horizontal component end  19   b  at location B. 
     The operator next inserts second vertical component end  15   b  within corresponding cutout segment  19   c  at rigid horizontal end  19   b  of second rigid horizontal component  4   aa . He or she congruently aligns aperture pairs  14   c / 14   cc  and  14   d / 14   dd  as described previously for aperture pairs  14   a / 14   aa  and  14   b / 14   bb . Threaded bolts  50   x  insert through aligned aperture pairs  14   c / 14   cc ,  14   d / 14   dd  to attach rigid vertical component  3   aa  to second rigid horizontal component  4   aa  at location C. 
     At location D, vertical aperture pairs  14   cc ,  14   dd  at vertical end  15   b  of rigid vertical component  3   a  congruently align with horizontal aperture pairs  14   c ,  14   d  respectively at horizontal end  19   a  of second rigid horizontal component  4   aa . Threaded bolts  50   x  insert through aligned pairs  14   c / 14   cc  and  14   d / 14   dd  as previously described. Preferably all rigid vertical component ends  15   a ,  15   b  are identical to each other, and all rigid horizontal component ends  19   a ,  19   b  are identical to each other. In other modes rigid horizontal components  4   a ,  4   aa  and rigid vertical components  3   a ,  3   aa  interchangeably and reversibly assemble in a different chronological order. 
     Still referring to  FIG. 5C , after assembly of one modular rigid support structure  2   a , there are a total of sixteen large partially elliptical apertures  17 : (i) eight large partially elliptical apertures  17  in an anterior orientation; and (ii) eight partially elliptical apertures  17  in a posterior orientation. In other embodiments rigid vertical components  3  and rigid horizontal components  4  assemble into other four-sided polygons, or other shapes, to form modular rigid support structure  2 . 
     Assembly of the Preferred Embodiment of Second Mount Rack Frame  1   
     a. Best Mode of Attaching Modular Rigid Support Structures  2   a ,  2   b  to First and Second Straight Base Legs  471   a ,  471   b    
     Referring to  FIGS. 3 and 5B , the operator initially selects one straight base leg  471   a  or  471   b  for attachment to rigid vertical component  3   a  or  3   aa  of completely assembled first anterior modular rigid support structures  2   a . He or she congruently initially aligns (i) square aperture set  18   b  with (ii) corresponding square aperture set  400   k  within corresponding straight leg upwardly protruding wall  400   j.    
     The operator inserts and tightens single threaded bolt  50   x  through each pair of congruently aligned large partially elliptical apertures  17  within (i) corresponding straight leg upwardly protruding wall  400   j  and (ii) square aperture set  18   b  within vertical lateral component side  40   dd.    
     The operator follows the same procedure for attachment of rigid vertical component  3   aa ,  3   b ,  3   bb  or other rigid vertical component  3  to straight base leg  471   a ,  471   b . This procedure includes insertion of bolts  50   x  through remaining three straight leg exterior square sets  400   k  and corresponding congruently aligned partial elliptical apertures  17  of remaining three aperture square sets  18 . 
     After complete assembly of the preferred second modular mount rack frame  1 , each straight base leg  471   a ,  471   b  is (i) parallel to the other. Each straight base leg  471   a ,  471   b  is also perpendicular to corresponding attached rigid vertical components  3 . However, other attachment chronologies and procedures also exist within the scope of the invention. 
     (2) Attachment of Rigid Horizontal Components  4  to Straight Base Legs  471   a ,  471   b    
     As best seen in  FIG. 5B , each horizontal component end  19   a ,  19   b  attaches to a corresponding inner longitudinal leg ledge  400   f . The operator congruently aligns (i) smaller partially elliptical apertures  17   a  within an outermost horizontal pair  16   a ,  16   e  within rigid horizontal component  4   a ,  4   a ,  4   b ,  4   bb , or  4 ; with (ii) two threaded round apertures  17   b  within one corresponding inner longitudinal leg ledge  400   ff.    
     The operator then inserts and tightens large one round threaded screw  50   a  through each congruently aligned smaller partially elliptical aperture  17   a  within horizontal pair  16   a  or  16   e , and corresponding threaded round aperture  17   b . The operator repeats this procedure for remaining congruently aligned outermost horizontal aperture pairs  16  and threaded round apertures  17   b  of inner longitudinal leg ledge  400   f.    
     Each anterior surface  10   d  of rigid vertical component end  15   a  is positioned three inches from corresponding anterior straight base leg end  400   h  when corresponding anterior rigid vertical component  3   a ,  3   aa  is properly attached to straight base leg  471   a ,  471   b . Each posterior vertical surface  10   dd  of rigid vertical component end  15   a  of posterior rigid vertical component  3   b ,  3   bb  is flush with corresponding posterior straight base leg end  400   hh.    
     Best Mode Attachment of Modular Rigid Support Structure  2  to Rack Base Legs  71   a ,  71   b  in the Second Embodiment of Second Modular Mount Rack Frame  1   
     Referring to  FIG. 5A , each first and second rigid vertical component  3   a ,  3   aa ,  3   b ,  3   bb , or  3  respectively attaches approximately six inches posterior to each corresponding first and second anterior rack base leg end  71   aa ,  71   bb  respectively. First, second, third and fourth partially large elliptical leg apertures  81   a ,  81   b ,  81   c ,  81   d  (generically rack large partially elliptical leg apertures  81 ) within each upwardly slanting rack leg wall  73   d , respectively congruently align with square aperture pairs  18  of a corresponding vertical component end  15   a.    
     Each two congruently aligned apertures  81 / 18  mechanically connects to each other by insertion of single threaded bolt  50   x . In embodiments comprising a single modular rigid support structure  2  with rack base legs  71   a ,  71   b , these bolts  50   x  provide attachment of rigid vertical components  3  to rack base legs  71   a ,  71   b.    
     Horizontal rigid components  4  attach to rack base legs  71   a ,  71   b , by horizontal aperture pairs  16   a  or  16   e  and corresponding ledge apertures  778   a ,  778   b . Apertures  778   a ,  778   b  congruently align with small partially elliptical apertures  17   a  with aperture pair  16   a  or  16   e . The operator then inserts and tightens one large screw  50   a  through apertures  778   a / 16   a ,  778   b / 16   a , or  778   a / 16   e ,  778   b / 16   e.    
     Referring to  FIGS. 2, 3 and 5B , prior art coasters or wheels  470  attach to lowest straight leg surface  400   p  at each anterior straight base leg end  400   h  or posterior base leg end  400   hh . Prior art coasters or wheels  470  attach with well-known prior art devices  481  by four small round screws  50   g  to lowest straight leg surface  400   p  in a pivoting manner. Referring to  FIG. 5A , rack coasters  70  attach to each rack base leg  71   a ,  71   b  at rack base ends  71  in a pivoting manner. Rack coasters or wheels  70  attach to base legs  71   a ,  71   b  by pivoting conventional prior art attachments  51   b  and mechanical fasteners  50   b  in a manner similar to that of straight base legs  471   a ,  471   b  described supra. However, other chronologies and procedures for frame assembly are also within the scope of the invention. 
     Best Mode of Assembly of Second Modular Mount Rack Frame  1  for Vertically Aligned and Attaching Uppermost Modular Rigid Support Structure  2   b  in the Preferred Embodiment and Second Embodiment 
     Referring to  FIG. 5B , to attach one uppermost modular rigid support structure  2   bb , the operator positions second posterior modular rigid support structure  2   bb  upon upper first rigid horizontal component  4   aa  of lower positioned first posterior modular rigid support structure  2   b . Horizontal aperture pairs  16  within lower rigid horizontal component  4   a  of second posterior modular rigid support structure  2   bb  are now congruent with aperture pairs  16  within upper first rigid horizontal component  4   aa  of first posterior modular rigid support structure  2   b . The operator inserts and tightens one large round threaded screw  50   a  through each pair of smaller partially elliptical aperture  17   a / 17   a  within each congruently aligned horizontal aperture pair  16  of adjoining rigid first and second horizontal components  4   a ,  4   aa.    
     The operator next congruently aligns plate apertures  92  of flat rigid connector plates  90   a  with 
     (i) corresponding vertical aperture sets  18   a / 18   c  along 
     (ii) lateral vertical component sides  40   d  of rigid vertical components ends  15   a ,  15   b  of rigid vertical support components  3   bb ,  3   bb    
     (iii) of first posterior modular rigid support structure  2   b  and upper second posterior modular rigid support structure  2   bb.    
     The operator then inserts and tightens bolt  50   x  through each of the eight pairs of congruently aligned apertures  17 / 92 . The operator repeats this identical procedure with second flat rigid connector plate  90   b  along rigid vertical component ends  15   a ,  15   b  of remaining rigid vertical components  3   bb , and  3   bb.    
     This identical procedure as described immediately supra, with rigid horizontal aperture pairs  16  and flat rigid connector plates  90 , is also the best mode for upper vertical attachment of first anterior modular rigid support structure  2   a  to second anterior modular rigid support structure  2   aa  in another embodiment. Rigid horizontal components  4   a ,  4   aa  are preferably identical in structure and dimensions, so horizontal rigid components  4   a ,  4   aa  are reversible with respect to upper and lower vertical positions. 
     With respect to horizontal aperture pairs  16 , the same attachment procedure with screws  50   a  remains the best mode for the preferred embodiment, as illustrated in  FIG. 1 . Preferably connector plates  90  are included within the best mode for upper vertical attachment of any modular rigid support structure  2  to another modular rigid support structure  2  in other embodiments. 
     Best Mode of Attaching Mounted Device  78  to the Preferred Embodiment of Second Modular Mount Rack Frame  1  and Other Embodiments 
     a. Anterior Two Opposing Point Attachment 
     (1) Connecting Device  78  to Bracket  75   
     Referring to  FIGS. 4 and 6 , the operator congruently aligns mounting bracket  75  to first opposing device aperture pair  53   a  and  53   b . He or she inserts and tightens single screw  50   g  through each corresponding congruently aligned device aperture  51   a  and bracket aperture  75   c.    
     (2) connecting bracket  75  to stamped metal strip  36   a ,  36   b    
     The operator inserts two cage nuts  59  within two vertically adjacent corresponding rack apertures  8  of first or second stamped metal strip  36   a ,  36   b . The operator inserts each cage nut  59 , so each first and second cage nut flange  59   a ,  59   b  respectively protrudes anterior from each corresponding rack aperture  8 . 
     The operator orients mounting bracket  75  so two bent bracket apertures  75   e  congruently align with corresponding cage nut apertures  59   c  within respective rack apertures  8 . The operator next inserts and tightens Philips screw  50   k  through each corresponding congruently aligned rack apertures  8 , bent segment aperture  75   e , and cage nut aperture  59   c . During this step the operator inserts Phillips screw  50   k  into cage nut aperture  59   c  through protruding cage nut flanges  59   a ,  59   b.    
     The operator repeats this identical process on the second opposing device side  78   b  (not seen in  FIG. 6 ), and thereby attaches second opposing side  78   b  to corresponding stamped metal strip  36   a  or  36   b . The operator can orient mounting bracket bent end  75   b  for attachment through rack apertures  8  of posterior stamped metal strip  36   b  or anterior stamped metal strip  36   a . To disengage mounted device  78 , the operator removes each Phillips screw  50   k  from congruently aligned cage nut  59 , rack aperture  8  and bent racket aperture  75   e.    
     This prior art attachment as described for rigid vertical component  3   a  is the best mode for all other modular rigid support structures  2  and devices  78   i . Other numbers of prior art bent bracket apertures  75   e , with corresponding rack apertures  8  and prior art cage nuts  59 , are also within the scope of the invention. In some embodiments mounting options also depend upon the design features of the manufacturer. 
     b. Four Opposing Point Attachment 
     Referring to  FIGS. 2 and 6 , the mechanics of attachment are identical to those for two point opposing point attachment with respect to anterior aperture pairs  53   a  and/or  53   b . However, on each posterior opposing side segment  556 , cage nut flanges  59   a ,  59   c  protrude posterior where device  78  attaches at opposing posterior device aperture pairs  53   c , and so bent bracket end  75   b  also faces posterior. 
     Consequently mounted device  78 , such as computer server  78   t , attaches at
         (i) First or second anterior device aperture pairs  53   a  or  53   b  respectively along the device&#39;s first and second opposing sides  78   a ,  78   b  respectively; and   (ii) Posterior device aperture pair  53   c  along the same device&#39;s first and second opposing sides  78   a ,  78   b  respectively,
 
for a total of eight attachment points.
       

     Referring to  FIG. 6 , in the best mode each device aperture pair  53   a ,  53   b ,  53   c  and corresponding cage nuts  59  are positioned the same vertical distance along corresponding stamped metal strips  36   a  or  36   b  from flat supporting surface  480  when supporting single device  78   t . In embodiments with at least two opposing modular rigid support structures  2 , there is sufficient structure for solely anterior support (two-point attachment) or anterior-posterior support (four-point attachment). 
     For example, smaller mounted devices  78   i  can be supported at device anterior segment  555  with two-point attachment by any modular rigid support structure  2 , such as modular rigid support structures  2   a ,  2   aa ,  2   b ,  2   bb . Similarly, larger mounted devices  78   t  can be supported at device posterior  556  by any modular rigid support structures  2  for four-point attachment. As seen in  FIG. 4 , in other embodiments, a sole and single modular rigid support structure  2  provides anterior two-point attachment. 
     Modification of a Linear Dimension  10   a  Between Rigid Vertical Components  3  within Each Rigid Multi-Component Support Structure  2 ,  2   a  and  2   b  in the Second Modular Mount Rack Frame in the Preferred Embodiment, Second Embodiment and Other Embodiments 
     In the pending invention there is one U unit of vertical height (i. e., one and three-quarter inches) for each subset  7  of three rack apertures  8 . Referring now to  FIGS. 8A and 8B , many mounted devices  78  deviate from the U industry standard of nineteen inches of horizontal length  10   a . In addition, prior art brackets  75  often exhibit variations in thickness of bent segment  75   b  and flat segment  75   d . These variations may interfere with precise fittings between rack apertures  8  and mounted device opposing sides  78   a ,  78   b.    
     As seen in  FIGS. 8 a    and  8 B, the operator can adjust the effective horizontal length  10   a  between for example, two opposing rigid vertical components  3   a ,  3   aa , or  3   b ,  3   bb  within a single modular rigid support structure  2   a ,  2   b ,  2   bb . This same procedure is applicable to any other pair of opposing rigid vertical components  3  within single modular rigid support structure  2 . 
     To adjust effective horizontal length  10   a , the operator initially loosens each bolt  50   x  and connected hex nut (not seen) within congruently aligned vertical aperture pairs  14  and  14   h  within a single or two opposing rigid vertical components  3   a ,  3   aa ,  3   b ,  3   bb  or  3 . The operator loosens Phillips screw  50   a  from each exterior positioned horizontal aperture pair  16   a  or  16   e  which congruently aligns with round threaded apertures  402   a ,  402   b  within corresponding attached straight base leg interior ledges  471   ff.    
     Referring to  FIG. 8A , preferably there is longitudinal clearance of approximately one-sixteenth inch on each side of each originally inserted bolt  50   x  or screw  50   a . This clearance limits the distance each bolt  50   x  or large round screw  50   a  may move laterally to increase effective distance  10   a . The operator loosens bolts  50   x  and mated hex nuts inserted within each pair of (i) partially elliptical apertures  17  of aperture set  400   k  or  400   kk ; and (ii) partially elliptical apertures  17  of corresponding square aperture sets  18 . As best seen in  FIG. 8B , the operator manually moves each rigid vertical component  3   a / 3   aa ,  3   b / 3   bb , or  3 / 3  (depending upon the embodiment) laterally in an exterior direction within corresponding cutout segment(s)  19   c . This lateral movement continues until each bolt  50   x  or large round screw  50   a  abuts outermost edge  14   g  of corresponding partially elliptical aperture  17  or  17   a . The operator then tightens bolts  50   x  within lateral vertical aperture sets  18  and square aperture sets  400   k  and/or  400   kk , as well as partially elliptical aperture pairs  14 ,  14   h  and  16 . 
     To decrease effective horizontal length  10   a  the operator manually moves each rigid vertical component  3   a ,  3   aa  or  3   b ,  3   bb  (or both depending upon the embodiment) laterally inward within each cutout segment section  19   c , and until each bolt  50   x  abuts innermost partially elliptical aperture edge  14   f  of corresponding partially elliptical apertures  17 ,  17   a . For both inward and outward lateral adjustments, after positioning rigid vertical components such as  3   a ,  3   aa , the operator tightens bolts  50   x , hex nuts and Phillips screws  50   a.    
     The same procedure for lateral adjustment applies to embodiments which (i) comprise vertically positioned rigid modular support structures such as  2   aa  or  2   bb . In these embodiments vertically aligned modular rigid support structures  2  can be laterally adjusted together, or independently of one another. The same procedure for lateral adjustment also applies to embodiments of second modular mount rack frame  1  with sole and single rigid modular support structure  2 . 
     Third Mount Rack Frame  608   
     Referring initially to  FIGS. 9 and 17 , third mount rack frame  608  is a free standing device which does not require attachment or support from exterior to frame  608 , except for contact of lowermost leg surfaces  606   a ,  606   b , casters or wheels  470  with horizontal surface  480 . Third mount rack frame  608  remains freestanding without attachments and supports whenever it supports a maximum weight of vertically aligned stored devices  78 . Third mount rack frame  608  does not require shelves to support stored and vertically aligned devices  78  between rigid vertical components  608   a ,  608   b  infra. Each rigid vertical component  608   a ,  608   b  is preferably (i) interchangeable with the other (ii) approximately twenty-five inches to eighty inches in longitudinal vertical height/longitudinal length  608   ee  (ii) two inches in posterior and anterior width infra, (iii) four and three-quarters inches in lateral width infra and (iii) approximately 1.5 millimeters in thickness. 
     Each rigid vertical component  608   a ,  608   b  has a first vertical end  608   c  and a second vertical end  608   d . Each rigid vertical component  608   a ,  608   b  preferably (i) weighs approximately four pounds and seven ounces and (ii) is made of SPCC quality cold rolled steel. Each rigid vertical component  608   a ,  608   b  is more preferably made of a single integral SPCC quality cold rolled steel plate sheet  609  which is folded into the appropriate shapes and structural features. Each SPCC quality cold rolled steel plate sheet  609  is preferably approximately 1.5 millimeters in thickness, but other thicknesses and materials are also within the scope of the invention. 
     Third mount rack frame  608  can support a load of at least approximately four hundred pounds whenever this weight is directed vertically downward towards supporting surface  480 . Each rigid vertical component  608   a ,  608   b  is preferably identical to the remaining rigid vertical component  608   a ,  608   b  in weight, height, width, structural features and other quantified dimensions. As best seen in  FIGS. 10 and 14 , each rigid vertical component  608   a ,  608   b  comprises a longitudinal vertical recess  608   f  which is co-extensive with each rigid vertical component vertical height/longitudinal length  608   ee . Each rigid vertical component longitudinal recess  608   f  is preferably defined by a vertical component lateral side  608   g , a vertical component anterior side  608   h  and a vertical component posterior side  608   i.    
     Vertical component sides  608   g ,  608   h  and  608   i  form a partial rectangular cross-section perpendicular to the longitudinal length  608   ee  of each rigid vertical component  608   a ,  608   b  in assembled frame  608 . As seen in  FIG. 17 , each vertical component anterior side and vertical component posterior side  608   h ,  608   i  comprise first and second vertical component vertically aligned apertures  608   s ,  608   t  respectively at each rigid vertical component end  608   c ,  608   d . Referring to  FIG. 16 , prior art power strip  600  reversibly attaches to one rigid vertical component  3  with small round screw  50   as  (not seen in this view) at each aperture  744   a ,  744   b  within each vertical component lateral side  608   g  as described supra for second mount rack frame  1 . 
     Each vertical component side  608   g ,  608   h ,  608   i  is preferably (i) rigid and (ii) integrally continuous with at least one remaining vertical component side  608   g ,  608   h  and  608   i . As best seen in  FIG. 10 , each rigid vertical component end  608   c ,  608   d  preferably comprises four individual apertures  626   a ,  626   b , 626   c ,  626   d  [hereinafter apertures  626 ]. Apertures  626  are configured as an aperture square  628  within corresponding single vertical component lateral side  608   g . Each aperture  626  within aperture square  628  receives a mechanical fastener  999 , preferably a threaded bolt  50   x , to reversibly attach a rigid vertical component end  608   c ,  608   d  to a corresponding rigid right rack base leg  701   a  or rigid left rack base leg  701   b  as described infra. 
     Rigid vertical components  608   a ,  608   b  are not only interchangeable with each other, but are also interchangeable with respect to which vertical component end  608   c ,  608   d  attaches to a corresponding rigid horizontal component  651   a ,  652  or rack base leg  701   a ,  701   b . Each aperture square  628  with inserted mechanical fasteners  999  that are preferably bolts  50   x  also mechanically attach and vertically align third mount rack frame  608 , without the rack base legs  701   a ,  701   b  to a lower positioned rigid modular multi-component support structure  2   a ,  2   b  or  2 . This vertical attachment preferably includes with connecting plates  90   a ,  90   b  as described supra for second mount rack frame  1 . Referring to  FIG. 10 , each rigid vertical component  608   a ,  608   b  also comprises two parallel metal strips  36   a ,  36   b  with rack sets  7  of vertically aligned apertures  8  as described for second mount rack frame  1  supra. Mounting brackets  75  or other connecting devices attach stored devices  78  in vertical alignment at rack sets  7  as described supra for second mount rack frame  1 . 
     Referring to  FIGS. 9, 10, 13 and 14 , third mount rack frame  608  preferably comprises an integral continuous upper rigid horizontal component  651   a  and an integral continuous lower rigid horizontal component  652 . Each upper rigid horizontal component  651   a  is preferably approximately (i) 23.5 inches in longitudinal length d 1 . Upper rigid horizontal component  651   a  is preferably approximately (i) two inches in width d 2  ( ii ) 1.5 millimeters in thickness and (ii) 10.4 ounces in weight. Upper rigid horizontal component  651   a  preferably includes a first upper horizontal component end  651   c  and a second upper horizontal component end  651   d . Each rigid horizontal component  651   a ,  652  is preferably made of an SPCC quality cold rolled steel plate sheet  651   x . Each upper horizontal component  651   a  is preferably integral and continuous with four smooth flat surfaces shaped as a rectangular solid. Most preferably these four surfaces include a first longitudinal side  651   g  and a second longitudinal side  651   h.    
     Vertically aligned apertures  651   e ,  651   f  preferably penetrate first longitudinal side  651   g  and second longitudinal side  651   h , and so upper longitudinal horizontal sides  651   g ,  651   h  are interchangeable with each other for attachment to rigid vertical components  608   a ,  608   b . Each upper rigid horizontal component  651   a  preferably attaches to (i) both first and second rigid vertical component ends  608   c ,  608   d  at first horizontal component end  651   c  and second horizontal component end  651   d  (ii) at aligned vertically aligned apertures  651   e ,  651   f  respectively. For this attachment apertures  651   e ,  651   f  congruently align with apertures  608   s ,  608   t  at rigid vertical component  608   a ,  608   b . A single mechanical fastener  999  (preferably a bolt  50   x ) inserts through each pair of congruently aligning apertures  651   e ,  651   f  and  608   s ,  608   t  within vertical component anterior side  608   h  or vertical component posterior side  608   i . Vertically aligning apertures  651   e ,  651   f  and  607   s ,  608   t  are each preferably partially elliptical in shape. 
     Referring to  FIGS. 9, 13, 17 and 18 , lower rigid horizontal component  652  is preferably made of a single integral SPCC quality cold rolled steel plate sheet  609  that is most preferably approximately 1.5 millimeters in thickness. Single plate sheet  609  is most preferably bent or folded to create the structural features described infra. Lower rigid horizontal component  652  is preferably approximately (i) 23.5 inches in longitudinal length d 3  and (ii) four and three-quarters inches in width d 3 . Each rigid lower horizontal component preferably (i) weighs approximately three pounds and eleven ounces and (ii) is the same longitudinal length as upper rigid horizontal component  651   a . Lower rigid horizontal component  652  preferably comprises a horizontal recess  652   e , and horizontal recess  652   e  is preferably coextensive with the longitudinal length d 1  of lower rigid horizontal component  652 .  FIGS. 13 and 14 . 
     Lower horizontal component  652  also comprises a first lower horizontal component end  652   a  and a second lower horizontal component end  652   b . Single horizontal recess  652   e  is bounded by first upwardly protruding horizontal component side  652   f , second upwardly protruding horizontal component side  652   g  and lowermost component side  652   h . Each upwardly protruding horizontal component side  652   f ,  652   g  is preferably approximately (i) two inches in height and (ii) twenty-three and five-eighths inches in longitudinal length. 
     Each side  652   f ,  652   g  preferably protrudes upwardly from first and second lower horizontal component edges  652   ff ,  652   gg  respectively integrally and at a right angle. Lower horizontal component sides  652   f ,  652   g  and  652   h  preferably are each continuous and integral with at least one remaining lower horizontal component side  652   f ,  652   g  and  652   h . Each first upwardly protruding horizontal component side  652   f  and second upwardly protruding horizontal component side  652   g  preferably comprises a perpendicular flat continuous rigid lip  652   u ,  652   v  respectively that is preferably approximately (i) three-quarters inch in width and (ii) the same longitudinal length as its corresponding upwardly protruding side  652   f ,  652   g.    
     Each upwardly protruding horizontal component side  652   g ,  652   h  at rigid horizontal component ends  652   a ,  652   c  comprises two vertically aligned apertures  652   j ,  652   k . Apertures  652   j ,  652   k  congruently align with apertures  608   s ,  608   t  within interchangeable rigid vertical component posterior and anterior sides  608   i ,  608   h . Most preferably vertically aligned apertures  652   j ,  652   k  
         (i) congruently align with vertically aligned apertures  608   s ,  608   t  at corresponding rigid vertical component ends  608   c ,  608   d  within vertical component anterior or posterior surfaces  608   i ,  608   h      (ii) to attach lower rigid horizontal component  652  with corresponding inserted mechanical fasteners  999 , and most preferably bolts  50   x , to rigid vertical components  608   a ,  608   b.  
 
Lower rigid horizontal component ends  652   a ,  652   b  are interchangeable with each other, and rigid vertical components  608   a ,  608   b  interchangeably attach to either lower horizontal component end  652   a ,  652   b  at either rigid vertical component end  15   a ,  15   b.  
       

     As best seen in  FIGS. 13 and 14 , individual apertures  652   p  align in preferably five spaced aperture pairs  652   r  along rigid horizontal lowermost side  652   h . Spaced aligned aperture pairs  652   r  are preferably aligned perpendicular to the longitudinal length d 1  of lower rigid horizontal component  652 . In the preferred embodiment of third mount rack frame  608 , two most exterior horizontal component aligned aperture pairs  652   t ,  652   y  congruently align with apertures  777   d ,  777   e  within a rack base leg  701   a ,  701   b  infra. This congruent alignment with inserted mechanical fasteners  999 , and most preferably screws  50   a , reversibly or permanently attach each rack base leg  701   a ,  701   b  to a lower rigid horizontal component end  652   a  or  652   b . In another embodiment of third mount rack frame  608 , partially elliptical apertures within aligned aperture pairs  652   r  congruently align with aligned partially elliptical aperture pairs  16  within rigid horizontal components  4   a ,  4   b  of a rigid modular multi-component support structure  2   a ,  2   b  or  2 . This congruent alignment provides reversible attachment with
         (i) corresponding inserted mechanical fasteners  999 , preferably bolts  50   x , within congruently aligned aperture pairs  652   p  and aperture pairs  16 , and   (ii) in a manner identical to vertical attachment and alignment for two or more rigid multi-component support structures  2   a ,  2   b ,  2  of second mount rack frame  1  supra.       

     With the above congruently aligned pairs  652   r  and  16  with corresponding inserted mechanical fasteners  999 . there is reversible vertical attachment and alignment of third frame  608  without rack base legs  701   a ,  701   b , infra to a rigid multi-component support structure  2   a ,  2   b ,  2 . In addition to this attachment through aperture pairs  652   p  and  16 , for this particular two-unit embodiment, 
     (i) two vertically aligned rigid vertical support component ends  608   c ,  608   d  from two separate rigid vertical components  608   a ,  608   b  most preferably attach to each other with one rigid flat connecting plate  90   a ,  90   b  as described supra 
     (ii) with congruently aligning plate apertures  92 , vertical component aperture squares  628  and inserted corresponding mechanical fasteners  999  which are most preferably bolts  50   x .  FIGS. 15A and 15B . 
     Referring to  FIGS. 9, 10, 11, 12 and 13 , third mount rack frame  608  preferably comprises a single left rack base leg  701   a  and a single right rack base leg  701   b . Each rack base leg  701   a ,  701   b  is most preferably approximately (i) twenty-two inches in longitudinal length d 5  and (ii) two and seven-eighths inches in width d 6 . With these dimensions mount rack frame  601  remains free-standing and satisfactory for supporting a maximum load of approximately four hundred pounds of vertically aligned and supported devices  78 . If a third mount rack frame  601  without rack base legs  701   a ,  701   b  vertically aligns with and attaches to a rigid modular multi-component support structure  2   a ,  2   b ,  2 , see infra, without casters or wheel  470 , then the maximum load becomes approximately eight hundred pounds. Implementation of four casters or wheels  470  as part of either a second mount rack frame or third mount rack frame  601  results in a maximum load of approximately 880 pounds. 
     Each rack base leg  701   a ,  701   b  preferably (i) weighs approximately three pounds and two ounces and (ii) is made of a single integral SPP quality cold rolled steel plate sheet  909  that is preferably approximately 1.5 millimeters in thickness. Each single integral sheet  909  is preferably folded or otherwise bent to create the structural and quantified features of a single rack base leg  701   a ,  701   b  as described infra. As best seen in  FIG. 12 , each rack base leg  701   a ,  701   b  is preferably (i) identical to the remaining rack base leg  701   a , 701   b  in dimensions and structure. However, one leg is configured as a left rack base leg  701   a  while the remaining leg is configured as a right rack base leg  701   b , and so they are not interchangeable within a third mount rack frame  608  with respect to each other.  FIG. 12 . Rack base legs  701   a ,  701   b  oppose each other and their longitudinal anterior-posterior length d 5  are preferably parallel to each other in properly assembled frame  608 . Rack base legs  701   a ,  701   b  are most preferably spaced approximately nineteen inches from each other in a properly assembled third rack frame  608 . 
     Referring in particular to  FIGS. 11, 12 and 13 , each rack base leg  701   a ,  701   b  has an anterior leg end  701   c  and a posterior leg end  701   d . Each rack base leg  701   a ,  701   b  further integrally includes (i) a bottom leg side  701   e , an upwardly protruding taller exterior leg side  701   f  and an upwardly protruding shorter interior leg side  701   g . Preferably leg sides  701   e ,  701   f , and  701   g  are integral and continuous with at least one remaining upwardly protruding leg side  701   e ,  701   f ,  701   g . Each upwardly protruding side  701   f ,  701   g  respectively preferably protrudes upwardly from bottom leg side  701   e  in a perpendicular and continuous manner from bottom exterior leg side edge  701   ee  and bottom interior leg side edge  701   eee  respectively. 
     Still referring to  FIGS. 11, 12 and 13 , bottommost leg sides  701   e  and upwardly protruding sides  701   f ,  701   g  are each co-extensive with longitudinal length d 5  of each rack base leg  701   a ,  701   b . Bottommost leg side  701   e  width is co-extensive with width d 6  of rack base leg  701   a ,  701   b , while upwardly protruding taller exterior leg side  701   f  is preferably approximately three and seven-eighths inches in uniform height. Upwardly protruding smaller interior leg side  701   g  is preferably approximately three-quarters inch in uniform height. As best seen in  FIG. 18 , each upwardly protruding taller exterior leg side  701   f  includes an integrally attached perpendicular bent upper edge  777   a  that is preferably approximately sixteen and one-quarter inches in longitudinal length as measured from a corresponding rack base leg posterior end  701   d . Perpendicular bent upper edge  777   a  is preferably approximately (i) three-quarters inch in width and (ii) co-extensive with integrally attached downwardly protruding bent upper lip  777   b  in longitudinal length. Downwardly protruding perpendicular bent upper lip  777   b  preferably (i) integrally and continuously attaches to bent upper edge  777   a  and is preferably (i) approximately three-eighths inch in width and (iii) sixteen and one-quarter inches in longitudinal length. 
     Referring to  FIGS. 14 and 18 , each upwardly protruding shorter interior leg side  701   g  includes a second integral continuous perpendicular bent face  777   c  that is preferably approximately (i) three-quarters inch in width and (iii) co-extensive with and the same longitudinal length as upwardly protruding interior small upper side  701   f . Perpendicular bent edge  777   c  contains two longitudinally aligned threaded apertures  777   d ,  777   e  proximal to rack base leg anterior end  701   c . Apertures  777   d ,  777   e  preferably 
     (i) congruently align with exteriorly positioned spaced aligned aperture pairs  652   r  and with corresponding inserted mechanical fasteners  999 , 
     (ii) to reversibly attach a lower horizontal component end  652   a ,  652   b  to a corresponding rack base anterior end  701   c.    
     Most preferably congruently aligning pairs of apertures  777   d ,  777   e  and  652   r  each comprise a single inserted corresponding threaded round head fastening screw  50   a . Inserted round head fastening screws  50   a  provide additional stability and sturdiness for third mount rack frame  601 . 
     Referring to  FIGS. 13 and 18 , each rack base leg bottommost side  701   e  preferably comprises a bottom leg side aperture square  875  comprising four individual bottom side apertures  888   a    888   b ,  888   c  and  888   d  [hereinafter individual bottom apertures  888 ]. Preferably there is a bottom leg side aperture square  875  at each anterior and posterior rack base leg end  701   c ,  701   d  along bottom rack leg side  701   e . Bottom aperture squares  875  form part of the attachment of wheels and/or coasters  470  to third mount rack frame  608 . In particular, each aperture of  888  of leg bottom side aperture square  875  preferably
         (i) reversibly attaches to a congruently aligning aperture of wheel or coaster  470   a  with   (ii) inserted mechanical fasteners  999  that are most preferably small diameter round head screws  50   a  as described supra for second mount rack frame  1 .
 
However, in other embodiments casters and/or wheels  470  are absent from third mount rack frame  608  without diminishing free-standing capability and maximum load capacity of third mount rack frame  608 .
       

     Referring in particular to  FIGS. 10 and 17 , each anterior rack base leg end  701   c  preferably comprises four individual apertures  833   a ,  833   b ,  833   c , and  833   d  [hereinafter apertures  833 ] configured as a leg side rectangle  834  within a corresponding upwardly protruding taller exterior leg side  701   f . Within each leg side rectangle  834  two horizontally aligned individual apertures  833  are preferably spaced from each other by approximately 3.5 inches, while two vertically aligned apertures  833  are preferably spaced from each other by approximately 1.75 inches (i.e., from the edge of one aperture  833  closest to the adjoining aperture  833  closest edge). In a properly assembled third mount rack frame  608 , apertures  833  of each leg square  834 
         (i) congruently align with individual apertures  626  of a corresponding aperture square  628     (ii) within a vertical component lateral side  608   g  at vertical component end  601   c  or  601   d , and   (iii) thereby reversibly or permanently attach a rigid vertical component  608   a ,  608   b  to a single rack base leg  701   a ,  701   b      (iv) with corresponding inserted mechanical fasteners  999  that are most preferably threaded bolts  50   x.          

     The two vertically aligned apertures  833  within a leg aperture square  834  most proximal to the corresponding anterior rack base leg end  701   c  preferably are located approximately 0.71875 inch from (i) the corresponding anterior rack base end  701   c  and (ii) uppermost taller exterior edge  701   ff  of taller upwardly protruding leg side  701   f  (i.e., from the edge of each aperture  833  closest to the anterior leg edge at  701   c  or edge  701   ff ). Devices  78  attach to rigid vertical components  608   a ,  608   b  as described supra for second mount rack frame  1 . Even when bearing a maximum load of four hundred pounds from attached devices  78 , none of the above disclosed frames or their embodiments require attachment or support from other structures for a free-standing capability, except for contact of rack base legs  701   a ,  701   b  and/or coasters or wheels  470  along horizontal surface  480 . 
     Each rigid vertical support end  608   c  or  608   d  preferably fits snugly within a corresponding partial recess formed by (i) upwardly protruding exterior taller rack leg side  701   f  and upwardly protruding interior smaller rack base side  701   g  as well as (ii) each lower rigid horizontal component upwardly protruding side  652   f ,  652   g . Each rigid vertical component  608   a ,  608   b  thereby attaches perpendicular to (i) each rack base leg  701   a ,  701   b  and (ii) lower rigid horizontal components  651   a  and  652 . Each rigid vertical component  608   a ,  608   b  also preferably attaches in a flush manner to each rack base anterior leg end  701   c , minus the thickness of intervening lower rigid horizontal component  652 . 
     Assembly of Third Mount Rack Frame  608   
     Referring to  FIG. 14 , the operator initially congruently aligns partially elliptical apertures  652   j ,  652   k  with partially elliptical apertures  608   s  and  608   t  respectively of a first rigid vertical component  608   a  or  608   b . The operator then inserts and tightens preferably one bolt  50   x  through each of two congruently aligned partially elliptical apertures  652   j , 608   s  and  652   k ,  608   t . The operator repeats this process for the remaining rigid horizontal end  652   a  or  652   b  with partially elliptical apertures  608   s ,  608   t  of a second rigid vertical component  608   a  or  608   b . The operator then inserts and tightens preferably one bolt  50   x  through congruently aligning aperture pairs  651   e ,  608   s  and  651   f ,  608   t  to attach upper rigid horizontal component  651   a  to the same two rigid vertical components  608   a ,  608   b  as lower rigid horizontal component  652 . 
     Rack base legs  701   a ,  701   b  attach to each rigid vertical component  608   a ,  608   b  in a manner identical to that described for second mount rack frame  1  supra, while wheels/coasters  470  attach to rack base legs  701   a ,  701   b  as described supra for second mount rack frame  1 . Each rack base leg  70   a   1 ,  701   b  attaches to a rigid lower horizontal component  652  with inserted mechanical fasteners  999 , preferably screws  50   a , as described supra through apertures  652   r  and  777   d ,  777   e.    
     Materials and Production of Second Mount Rack Frame  1  and Third Mount Rack Frame  608  in the Best Mode and Preferred Embodiment(s) 
     Rigid vertical components  3   a ,  3   aa ,  3   b ,  3   b  and rigid horizontal components  4   a ,  4   aa ,  4   b ,  4   bb  are preferably made of SPCC quality cold rolled steel. However, materials such as copper or other rigid materials are also satisfactory for second mount rack frame  1  as well as third mount rack frame  608 . Small round screws  50   a ,  50   b ,  50   g ,  50   k , are preferably made of SPCC quality cold rolled steel, but materials such as copper or other rigid materials are also satisfactory. Straight base legs  471   a ,  471   b , rack base legs  71   a ,  71   b ,  701   a ,  701   b  are preferably made of SPCC quality cold rolled steel, but copper or other rigid materials are also satisfactory. Bolts  50   x  are preferably made of steel but other materials such as iron are also satisfactory. 
     Cold rolled steel is one of the widely used flat components used in constructing automobiles, home appliances, steel furniture and other equipment. Cold rolling is a well known prior art method of metal treatment wherein microscopic defects in the metal are nucleated throughout deformed area(s). Cold rolling increases the hardness and strength of a metal, but cold rolling also results in a large decrease in ductility. Mechanical attachments to wheels and coasters  470 ,  70  are preferably made of SPCC cold rolled steel, but copper or other rigid materials are also satisfactory in both the second mount rack frame  1  and third mount rack frame  608 . Cage nuts  59  and washers  50   d  are preferably made of SPCC quality cold rolled steel, but copper or other rigid materials are also satisfactory in both the second mount rack frame  1  and the third mount rack frame  608 . Prior art connecting brackets  75  are preferably made of SPCC quality cold rolled steel, but copper or other rigid materials are also satisfactory in both the second mount rack frame and third mount rack frame  608 . 
     Factory production of second mount rack frames  1  and third mount rack frame  601  components proceeds as follows:
     (a) Mold production;   (b) Shear of SPCC cold rolled steel plate sheets by numerically controlled computers;   (c) Punching of sheared plate sheets;   (d) Bending and folding of sheared SPCC cold rolled steel plate sheets by numerically controlled computers; and   (e) Application of a surface finish to the SPCC cold rolled steel plate sheets which includes:
       (1) degreasing;   (2) acid pickling;   rust prevention and parkerizing applications;   (4) pure water cleaning; and   (5) static electricity prevention plastic which is painted upon the metal surfaces.   
       

     The above text describes the preferred embodiment and other embodiments for the second mount rack frame  1  and third mount rack frame  608 , as well as the best mode of their applications. However, those skilled in this art may envision other possible variations within the invention&#39;s scope. Accordingly, since our invention is possible in other specific forms without departing from the sprit or essential characteristic thereof, the embodiments described herein are considered in all respects illustrative and not restrictive.