# US 7,073,300 B1 · Reinforced concrete part for producing foundations of buildings

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- Number: US 7,073,300 B1
- Document ID: US7073300B1
- Status: Granted
- Kind: B1
- Application number: 10/070,116
- Filed: 2000-08-29
- Granted: 2006-07-11
- Earliest claimed: 1999-09-01
- Inventors: Udo Sohns
- Web page: https://patentgrep.com/patent/US7073300B1

## CPC

- E04B 2/8611: {with spacers being embedded in at least one form leaf}
- E04B 2002/867: {Corner details}
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})

## Abstract

The invention relates to a reinforced concrete section (1, 23, 26–28) comprising two commercially available pre-cast floor elements (2, 3) of the same type. Each element consists of a substantially rectangular concrete slab (4, 21) and at least one lattice girder (5, 7) attached thereto. The two pre-cast floor elements are arranged in a laterally reversed manner so that their concrete slabs (4, 21) are situated parallel to and at a distance from each other and their lattice girders face one another. The pre-cast floor elements (2, 3) are fixedly attached to one another by their lattice girders (5–7). The reinforced concrete section (1, 23, 26–28) can be used with site-mixed concrete to rapidly produce a foundation for a building on the building site, without erecting the shuttering and dismantling the shuttering.

## Claims

### Claim 1

A foundation for buildings, comprising:
a plurality of reinforced concrete sections, each reinforced concrete section comprising:
two pre-cast floor elements each comprising a substantially rectangular concrete slab and at least one lattice girder made of steel attached to the concrete slab, said lattice girder having a top boom spaced from the concrete slab, the two pre-cast floor elements arranged in a laterally reversed manner so that their concrete slabs are situated parallel to and at a distance from one another and their lattice girders face one another; and
at least one transition piece extending rigidly and substantially horizontally between the top booms of the facing lattice girders to thereby rigidly attach the two pre-cast floor elements to one another to form a single prefabricated part;
wherein the rectangular concrete slabs each have a pair of opposite longitudinal edges giving each reinforced concrete section four longitudinal edges;
wherein the plurality of reinforced concrete sections are situated in a position in which they are each standing on two of their longitudinal edges and each section substantially abuts another of the sections; and
the space between the concrete slabs of the reinforced concrete sections is filled with site-mixed concrete.

### Claim 2

A reinforced concrete section for producing foundations for buildings, comprising:
two pre-cast floor elements each comprising a substantially rectangular concrete slab and at least one lattice girder made of steel attached to the concrete slab, said lattice girder having a top boom spaced from the concrete slab, the two pre-cast floor elements arranged in a laterally reversed manner so that their concrete slabs are situated parallel to and at a distance from one another and their lattice girders face one another, and
at least one transition piece extending rigidly and substantially horizontally between the top booms of the facing lattice girders to thereby rigidly attach the two pre-cast floor elements to one another to form a single prefabricated part.

### Claim 3 (depends on 2)

A reinforced concrete section according to claim 2, wherein the at least one transition piece is welded to each lattice girder top boom.

### Claim 4 (depends on 3)

A reinforced concrete section according to claim 3, wherein the at least one transition piece is a flat rod or a round rod.

### Claim 5

A method of forming a foundation for buildings, comprising the steps of:
obtaining a plurality of reinforced concrete sections wherein each reinforced concrete section comprises two pre-cast floor elements each comprising a substantially rectangular concrete slab having a pair of opposite longitudinal edges and at least one lattice girder made of steel attached to the concrete slab, said lattice girder having a top boom spaced from the concrete slab, the two pre-cast floor elements arranged in a laterally reversed manner so that their concrete slabs are situated parallel to and at a distance from one another and their lattice girders face one another, and at least one transition piece extending rigidly and substantially horizontally between the top booms of the facing lattice girders to thereby rigidly attach the two pre-cast floor elements to one another to form a single prefabricated part having four longitudinal edges;
arranging the plurality of reinforced concrete sections with each section standing on two of its longitudinal edges and with each section substantially abutting at least one other section to form a foundation channel; and
filling the foundation channel with site mixed concrete to form the building foundation.

### Claim 6 (depends on 1)

A foundation for buildings according to claim 1, wherein the at least one transition piece is welded to each lattice girder top boom.

### Claim 7 (depends on 6)

A foundation for buildings according to claim 6, wherein the at least one transition piece is a flat rod or a round rod.