with reference to fig1 , a cubicle 11 is shown having spacial dimensions which are mostly defined in areawise extent by the upright posts 13 , 15 , and 17 , supported by floor 19 . the upright posts are joined by transverse beams 21 and 23 which are secured to the upright posts . upright posts and transverse beams are known cubicle backbone structures of the prior art and sold commercially for forming office cubicles . it is typical that the transverse beams will have transverse slots , such as a top slot 22 and a lateral slot 24 . typically , such slots are used for attaching or guiding members that will be supported by the upright posts and transverse beams . it is preferable , although not essential , that posts and beams contain all necessary utilities , such as electricity and signal cables , not shown but contained within the structure . the present invention deals with separation partitions between cubicles . such separation partitions form portions of cubicle walls that can be personalized in a manner described herein . in the embodiment of fig1 , the separation partitions are formed by the first open rack 25 supported by transverse beam 21 and a second open rack 27 supported by transverse beam 23 . each open rack will be described in greater detail subsequently . the first open rack 25 carries the first and second panels 31 and 33 which close portions of the open rack , thereby forming a partial solid wall . a first panel 31 has transverse slots 32 that can be used for attaching personal articles . the second panel 33 may be a whiteboard or a bulletin board . the second open rack 27 has a third panel 35 and a fourth panel 37 . the third panel 35 has storage shelves 36 while the fourth panel 37 may be the same as , or compliment , the second panel 33 . with reference to fig2 , the first open rack 45 is seen to be connected to the transverse beam 21 by means of the first and second brackets 41 and 43 . both brackets 41 and 43 are attached to transverse beam 21 by engaging a top slot 22 and lateral slot 24 in the transverse beam . the first open rack 45 is seen to have 5 rails , i . e ., cross members between upright standards . two of the rails , namely rails 42 and 44 both engage the first and second brackets 41 and 43 in a manner described below . the open rack 45 may be lowered by placing alternate pairs of rails within clefts of the bracket so long as clearance with floor 19 exists . the second open rack 47 has four rails and so does not stand as high as the first open rack 45 . the number of rails is not critical and may range between 3 to 7 or more , but 4 or 5 is preferred . the transverse beam 21 is seen to support back - to - back open racks including the first open rack 45 and the third open rack 55 immediately behind the first open rack 45 . back - to - back open racks allow formation of mutually adjoining cubicles with each cubicle user being allowed to personalize a rack on the user &# 39 ; s side of a transverse beam . open rack 47 is supported by third bracket 46 and fourth bracket 49 which engage the rails 52 and 54 which form the cross members of the second open rack . cubicle users can select open racks of a desired size , such as a four rail rack or a five rail rack , or some other configuration so long as rails fit in clefts of the support brackets . the construction and weight of open racks allow individual workers to install , move , re - configure and disassemble racks by hand without assistance of tools or special equipment . a company may keep an assortment of racks in a storage area and allow users to change racks as desired . with reference to fig3 , transverse beam 21 is seen to support first bracket 41 on a first side of the beam and second bracket 43 on a back side of the beam and hence , it only partly seen . the first bracket 41 has a head portion 71 and a first jaw 53 which together define an intermediate first cleft 51 . a second cleft 81 is defined by a second jaw 83 at the bottom of body portion 75 that is below head portion 71 . each bracket is preferably a unitary member although this is not important . brackets may be cast from aluminum with a plurality of mass relief holes 79 to make the brackets lighter weight . first rail 65 and second rail 85 , both associated with upright standard 67 may be seen to fit respectively into first cleft 51 and second cleft 81 , respectively , to be supported by first jaw 53 and second jaw 83 . thus , a pair of spaced - apart similar brackets provide stable support for an open rack from a post and beam backbone . it may be seen that a second bracket 43 has a head portion 73 which is opposite head portion 71 of first bracket 41 . both brackets have a tab which fits into slot 22 at the top of transverse beam 21 . second bracket 43 has a body portion 77 below head portion 73 and a second jaw 87 below the body 77 . rail 86 is seen to be supported by the second jaw 87 . rail 86 partially supports upright standard 69 of an open rack , together with a first jaw on the back side of transverse beam 21 , not seen in fig3 . back - to - back placement of brackets increases the stability of back - to - back wall partitions , although back - to - back placement of brackets is not essential . brackets allow a selected vertical positioning of racks . fig4 a and 4b show a bracket 41 having head portion 73 and first jaw 53 creating first cleft 51 which is sufficiently open for entry of rails of an open rack . similarly , the second cleft 81 defined by jaw 83 is also sufficiently open for entry of another rail . body portion 75 is seen to have the mass relief holes 79 as well as a first tab 91 which rides in a top slot of a transverse beam . a smaller second tab 93 is also on the back side of bracket 41 and rides in the lateral slot of a transverse beam . in fig5 a and 5b , the tabs 91 and 93 are seen to have fasteners 95 and 97 securing the tabs in place . alternatively , the tabs may be unitary with a bracket forming a one piece member . the tabs allow brackets to be easily attached and removed from a transverse beam so that cubicle walls may be rapidly put up , taken down , or moved . in fig6 , a first open rack 25 is a skeleton formed by parallel transverse rails 105 , 107 , 109 , and 111 supported between first and second upright standards 101 and 103 , respectively . both the rails and the standards are made of aluminum tubing approximately 1 . 25 inches in diameter . transverse rails may be brazed or welded to the upright standards , although other construction methods may be used . the rails are approximately 12 inches apart and aligned in parallel manner . a similar situation exists in fig7 , except that five rails are used instead of four . the rails 205 , 207 , 209 , 211 , and 213 are supported between upright standards 201 and 203 . a similar construction for the standards and rails is used as in fig6 . the open rack of fig7 could potentially form a wall one foot higher than the rack of fig6 assuming that the open rack was closed by panels . it is important that the tubes that form the rails and upright standards be hollow tubes for weight reduction . it is not necessary that the tubes be formed from aluminum . other materials such as thin steel or carbon or plastic tubes may be used . tubes are separated by approximately 12 inches , center - to - center . upright standards are separated by approximately 54 to 72 inches . the four rail design of fig3 is approximately 3 feet tall while the five rail design of fig7 is approximately 4 feet tall . both are approximately 54 to 72 inches wide . with reference to fig8 , a first panel 31 is shown having a hook portion 32 which freely first hangs on a transverse rail remains in place by gravity . the panel engages a transverse rail with a hook portion . side edges 34 contain slats 38 . slats 38 may be adapted to freely hold user personalized items , such as fabric , pictures , or the like . in fig9 , the second panel 133 has a hook portion 132 adapted to freely hang on a transverse rail . the second panel has a tack board 136 between opposed side edges 134 . the panel may have a central opening 138 , between 12 inches and 20 inches in various shapes , such as circular , for allowing viewing , like a window , except without glass . such windows or viewing ports are intended to avoid isolation of users and promote communication yet easily maintaining privacy by allowing a user to drop a cardboard closure between the side edges 134 , if desired . fig1 shows a third panel 333 which is positioned by hook portion 332 sized to fit over and hang on a transverse rail . the third panel has book shelves 336 with opposed book end portions 338 , forming a book case . side walls 334 support the shelves . a backing member 342 is optional and is shown as a tack board . other boards could be used . the four panels described above are exemplary other panels involving video displays , photo display boards , or art work displays may be substituted . the idea is to allow a user to customize the users cubicle with whatever panels are deemed appropriate with selected amounts of openness . the height of racks may be adjusted with the brackets or by the size of the rack itself as seen by the choices between the racks of fig6 and 7 . trained furniture installers or technicians are not needed to install or modify the partitions of the present invention .
non - architectural posts and beams of the kind used as cubicle backbone structures are now used to support open racks as skeletons for hanging diverse user - selected panels . the open racks have upright standards joined by spaced - apart transverse rails . a pair of brackets join an open rack to a beam . each bracket has a beam gripping face and a rack gripping face . the rack gripping face has clefts that engage spaced - apart rails and have mass relief for light weight . panels are freely hung on the rails and may be selected from whiteboards , bulletin boards , shelving , book cases and window panels for user personalization .