Mounting bracket for mounting device installation ducts on parapet structures and as a support for convection grilles. The mounting bracket can be used for all Rapid 80 device installation duct systems of type GK and GA. The appropriate wall bracket adapter is also required for mounting GK device installation ducts made of plastic. The connecting profile is required for mounting double ducts type GS-D70170 and GS-D90170 as well as for GS ducts with a nominal width of 210 mm.