Abstract: A concrete form which is particularly suited for casting-in-place concrete structures, such as a building, comprises a plurality of metallic form members that are interconnected so as to define a planar form surface having a plurality of spaced, parallel elongated depressions extending across the entire length of the form. The resulting concrete structure is generally planar having a relatively thin planar surface which is reinforced by unitary, spaced, parallel beams formed by said depressions. The resulting structure is of comparable strength to a thicker slab of concrete, requires less concrete, and provides spacing in-between the parallel beams for the ducting of utility lines. In a modification, the depressions may also include frangible mandrels which may be readily punched out of the concrete structure to enable the ducting of utility lines transverse to the beams of concrete.

Abstract: An architecturally finished concrete structure is a composite of a finished wallboard member, such as plasterboard, plywood, etc., to which is bonded a plurality of elongated hollow void creating devices, with said devices being embedded in a concrete structure that is adhered to said finished wallboard member. In the subject method, one side, or both sides, of the concrete form for casting-in-place the concrete structure is defined by a finished wallboard member to which is adhered a plurality of elongated hollow void creating devices. Concrete is poured in the space defined by the concrete form, and is cured so as to be in intimate contact with, and embed, the void creating devices, and the resulting concrete structure is architecturally finished by having one or both faces thereof formed of said wallboard member.

Abstract: A complete concrete structure, especially houses, having any desired architectural form and appearance is constructed in a series operations wherein the foundation, the interior and exterior walls, and the floor are constructed at the situs from a single basic, monolithic pre-cast modular concrete beam. Each beam is an elongated concrete member having a generally rectangular cross-section, and having a central aperture extending through the length of said beam. In addition, two opposite sides of the beam are provided with a plurality of lateral holes, and said sides are configured to have a longitudinally extending tongue and groove arrangement so that abutting modular concrete beams will interfit with one another. Either one or both of the other two opposite sides of the beams may be architecturally finished, depending on whether the beam is to be employed as forming a portion of the foundation, the upstanding walls, or the roof structure.