Abstract: A floor-leveling system is provided and includes such features as a corner pedestal, a cross-joint pedestal, a side-joint pedestal, an interior pedestal, an exterior frame support, an interior frame support, and drop-in pins that may be used and assembled together to construct a sufficient foundation to collectively support a temporary structure that is placed thereon. These various components may be quickly coupled together in assorted configurations to form the foundation that is sufficiently strong and rigid to suitably support the weight of the structure. Many of the components of the foundation can be adjusted to conform to uneven elevations of the ground surface upon which the foundation is to be placed. The ability of the foundation to be quickly assembled and adapted to uneven elevation significantly reduces the man-power and time required to assemble the foundation and erect the structure thereon.