A modular panelized form wall include a first wall panel and a second wall panel; and a support panel having vertical steel rails which frame the vertical sides of the support panel. The support panel is arranged between the first and second wall panels. The first wall panel, the second wall panel and the support panel are connected together to form a portion of the modular panelized form wall. Wide head brackets can be connected to a top of the support panel for an overhead self-lifting grid system to be attached to the modular panelized form wall. Wide landing brackets can be connected to a bottom of the support panel to transmit the loads from the support panel to the underlying support. Shear pins can be inserted through the vertical steel rails at various locations in the support panel and through corresponding holes in the first and second wall panels, the holes to receive the shear pins to distribute the vertical loads away from the support panel to the first and second wall panels.