but built up in mirror image wherein the basic wall support forming one side of the support construction is each time identical with the supplementary wall support forming the other side the connection between the basic and supplementary wall supports is effected by means of screw connections 15 but can also be executed by means of rivets or welds sectional illustration v u2014 v fig5 shows one of these connections as a screw connection 15 in the region of the framework struts 14 wherein an intermediate member 16 is inserted between the struts the screw connections are particularly useful to allow the supplementary wall supports to be mounted to the basic wall supports after installation for retrofitting since screw holes in the basic wall supports can be provided at the time of installation for subsequent use similar wall supports can also be realized from rectangular hollow profile members they are suitable as basic and supplementary wall supports and enable identical symmetrical construction therefrom for lefthand and righthand constructional executions fig6 shows a form of construction of wall supports of the present invention which are built up from rectangular hollow profile members 17 in a framework arrangement the wall support components have at the junctions caused by their length intermediate flanges 18 which are tightened against one another by means of screw connections 19 during assembly in fig7 it is illustrated how with wall supports of rectangular hollow profile members 17 the supplementary wall supports are flange mounted laterally to the basic wall supports by screw connections 20 in the region of the connecting flanges 18 a further possible form of execution of double wall supports of the invention is illustrated in fig8 wherein the supplementary wall supports 21 consist of solid steel plates in facing contact with.