Abstract: Precast structures are formed of precast walls fitted between precast posts extending from cast in place footings, prior to the pouring of a slab. During pouring of the slab, anchors may tie together the panels, posts and slab. Precast concrete, tension fabric or traditional roofing members may be added to form a post and beam construction that spans large open areas providing for flexible manufacturing, storage, hangar, office, schools, institutional, or residential interior design features, due to the structural integrity and cost advantages of structures produced using this method of precast construction.