locked against rotation to the post 14 the support 16 of the retaining means 10 according to the invention has on its rear side facing the post 14 a flat rectangular groove or rebate 34 the width of which corresponds to the width of the post fig2 the rebate 34 forms a connecting device 34 in which the post 14 is located in this way the support 16 is held on the post 14 by form fit locked against rotation fixing of the support 16 is effected by means of a central bolt 36 which is pushed through the post 14 and a central hole 38 in the support 16 and screwed into the collar nut 26 the supporting elements 22 in the form of flat bars have a constant longitudinal section across their width which corresponds to the side face of the supporting elements 22 visible in fig1 in this way the supporting elements 22 can also be inexpensively manufactured by cutting from an extruded profiled rod of an aluminium alloy in fig1 four glass panes 12 are secured in the region of corners facing one another of the glass panes 12 by means of the retaining means 10 according to the invention to the post 14 of the substructure the remainder of which is not shown for fixing the glass panes 12 are provided with an undercut bore in which an undercut glass anchor 40 is inserted since such undercut glass anchors 40 are known per se to the expert and do not form the actual subject matter of the invention they are not described in detail the undercut glass anchors 40 lie with a shank 42 in the longitudinal slots 32 of the forks 30 of the supporting elements 22 in fig3 the.