Abstract: The disclosure provides a system and method for constructing support structures in buildings or other projects, which can support molds for use when pouring reinforced concrete slabs. The disclosed structures can accommodate more than one molds stacked vertically one over the other, and can remain in place to define walls or other separators in the completed structure. In one embodiment, the disclosed structure is a wall panel including a frame and vertical support members. The wall panel includes features allowing the vertical stacking of multiple wall panels. A temporary bracing system is further disclosed for use when stabilizing multiple stacked panels until construction of the surrounding floor or ceiling slabs has been completed.