Abstract: A wall cladding system includes a slab bracket, a connector tube, first and second façade panels, and first and second attachment rails. The slab bracket includes a base wall and first and second forward extending flanges defining a gap in which the connector tube is secured. The first attachment rail is secured along an upper edge the first façade panel and includes a mounting wall fastened to the connector tube and a support wall extending upward from the mounting wall, spaced from the connector tube to define a first slot. The second attachment rail is secured along a lower edge of the second façade panel and includes a downward extending hanger wall spaced apart from a rear surface of the second façade panel to define a second slot, with the hanger wall received in the first slot and the support wall received in the second slot.