arms 88 arms 88 each include a respective aperture 89 at a position adjacent the respective end edges of arms 88 return bracket 80 includes slots 91 formed in the periphery of return bracket 80 as shown and disposed at a position where arms 88 and respective side walls 84 meet return bracket 80 also includes a plurality of spaced discrete connection points 92 disposed along top wall 82 and side walls 84 as shown in fig7 connection points 92 are illustrated as spaced discrete apertures in alternate embodiments connection points 92 can comprise a plurality of spaced discrete projecting pins hooks or other types of similar mechanical interfaces fig8 a 9 illustrate table assembly 94 including table or first work surface 96 defining width w 1 and depth d 1 and supported on table leg assembly 100 and table beam 102 table assembly also includes desk return or second work surface 98 which is supported by desk return leg assembly 110 and desk return beam 112 and defines width w 2 and depth d 1 width w 2 of second work surface 98 is different from width w 1 of first work surface 96 but depth d 1 is the same for both of work surfaces 96 98 table beam 102 includes horizontal rails 104 which have a generally j shaped cross section similar to horizontal rails 42 as illustrated in fig2 the opposing ends of rails 104 are secured to a.