a slab bracket including a base wall mountable to a panel mounting location of a building structure and first and second forward extending flanges defining a gap therebetween;

a connector tube secured in the gap by one or more fasteners secured through first and second side walls of the connector tube and through the first and second forward extending flanges;

a first façade panel;

a first attachment rail secured along an upper edge of the first façade panel, including a mounting wall that abuts the connector tube for fastening thereto, and a support wall extending upward from the mounting wall, spaced from the connector tube to define a first slot;

a second façade panel; and

a second attachment rail secured along a lower edge of the second façade panel, including a downward extending hanger wall spaced apart from a rear surface of the second façade panel to define a second slot;

wherein the hanger wall of the second attachment rail is received in the first slot, and the support wall of the first attachment rail is received in the second slot, for interlocking retention of the second attachment rail and second façade panel with the first façade panel; and

wherein the connector tube provides a discrete panel mounting location and does not extend between multiple panel mounting locations of the building structure.