Abstract: The present invention refers to the improvements made to precast integral structure elements used in the fast construction of several-floor buildings made with hollow core slabs that have the same length wanted for the buildings height, thus allowing the construction of a prototype building in very short mounting and assembly times. Such structure elements are extruded slabs made of prestressed concrete which act as one piece bearing walls of the buildings height, as floor structure and ceiling slabs, and as parapet slab.

Abstract: Bearing shoes that run under the abutment's axis with cradles whose precast walls are placed over the bearing shoe assembly, so that when the concrete is poured over these bearing shoes, an integral unit of the bearing shoe integrated with the cradle is formed. For the walls, TT (double T) sections are used, which consist of precast elements of reinforced and/or pre-stressed concrete, that are able to resist the horizontal and vertical forces that could act over the bridge's abutments. These TT sections are used as abutments, wings and gravity retaining walls; as central piers, precast elements of columns with caps are used, in which rectangular-section beams are simply supported with their integrated bents. Occasionally, when the vehicles access embankment or earth fills to the bridge allow it, the abutment is anchored in order to avoid its horizontal thrust, as reinforced earth.

Abstract: Prefabricated vertical and horizontal support elements. The vertical support elements consist of columns which have breaches on the concrete at the floor levels. The horizontal support elements are made of supporting and rigidity beams, that have protruding elements which can be inserted in the cited breaches of the columns. Every protruding element of every beam is inserted between the vertical rods of the column into which it is assembled. The beams are held in place by other rods that are laid longitudinally. These rods are anchored to the beams by means of protruding steel rods or similar devices before the concrete is poured.