Hingeable connection device for thru the slab connections in foldable building construction

In the method of constructing buildings with folding slabs, a connection device for connecting overlying ceiling slabs to the hinged edge of the underlying wall slabs after said slabs have been cast, said connection comprising,

• at least one access slot thru said ceiling slab, minimum width of said slot equal to the thickness of said wall slab, and said access slot located in said ceiling slab according to the footprint location of said hinge edge of said wall slab in the erected building, and in addition,
• an elongated connecting member, said member less in width than said access slot, and thickness of said wall;
• and said member capable of being installed from above said overlying slab down thru said access hole to engage a pivot means located in edge of said underlying wall slab, and in addition,
• a restraining means provided to limit the vertical movement of said elongated member from passing downward all the way thru said access slot, and;
• means provided in said elongated device to permit said overlying slab to move upward, and then said elongated member to engage said pivot means, and to elevate said pivot means and permit said wall to rotate to a vertical dependent position, and lowering said ceiling slab causes said wall to come to bear on a supportive surface, and said elongated member to guide said ceiling slab to a precise position bearing on said wall.