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WO1994019557A1 - A prefabricated structural panel - Google Patents

A prefabricated structural panel Download PDF

Info

Publication number
WO1994019557A1
WO1994019557A1 PCT/IT1993/000126 IT9300126W WO9419557A1 WO 1994019557 A1 WO1994019557 A1 WO 1994019557A1 IT 9300126 W IT9300126 W IT 9300126W WO 9419557 A1 WO9419557 A1 WO 9419557A1
Authority
WO
WIPO (PCT)
Prior art keywords
meshes
metal meshes
panel
external metal
external
Prior art date
Application number
PCT/IT1993/000126
Other languages
French (fr)
Inventor
Sandro Marchiori
Original Assignee
N.T.C. S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by N.T.C. S.R.L. filed Critical N.T.C. S.R.L.
Publication of WO1994019557A1 publication Critical patent/WO1994019557A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E04B2/8658—Walls made by casting, pouring, or tamping in situ made in permanent forms using wire netting, a lattice or the like as form leaves
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/842—Walls made by casting, pouring, or tamping in situ by projecting or otherwise applying hardenable masses to the exterior of a form leaf
    • E04B2/845—Walls made by casting, pouring, or tamping in situ by projecting or otherwise applying hardenable masses to the exterior of a form leaf the form leaf comprising a wire netting, lattice or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/842—Walls made by casting, pouring, or tamping in situ by projecting or otherwise applying hardenable masses to the exterior of a form leaf
    • E04B2/847—Walls made by casting, pouring, or tamping in situ by projecting or otherwise applying hardenable masses to the exterior of a form leaf the form leaf comprising an insulating foam panel

Definitions

  • the invention relates to a prefabricated structural panel.
  • panels of such type are widely used, and comprise a flat structural element made of two external layers of corrugated polystyrene separated by a space injected with concrete.
  • the polystyrene layers are caged, before the concrete is introduced, in a frame of metal meshes held together by welded metal rods. The external surfaces of the panel are then rendered.
  • a drawback present in panels of the above type is that the intermediate concrete generates a pressure that sometimes breaks the welding on the rods and weakens the panel.
  • the principal aim of the present invention is to obviate the above-mentioned drawback by providing a panel which is able to resist the pressure generated by the concrete between the panels and thus eliminate the breakage risks of the welding holding the metal mesh connecting rods in place.
  • An advantage of the present invention is that the panel loading and unloading operations are made easier, since the panels exhibit no external points or edges obstructing the relative sliding of the panels and making them difficult to move.
  • figure 1 shows a schematic broken section made according to a horizontal plane of a bearing wall
  • figure 2 shows a schematic broken section made according to a horizontal plane of a partition wall
  • FIG. 3 shows a partial section of a floor.
  • 1 denotes a flat structural element closed between a pair of external metal meshes 2 constituted by longitudinal wires 3 and crosswires 4 .
  • the flat structural element 1 is constituted by two layers of polystyrene 5 separated from each other by a layer of concrete 6.
  • An internal metal mesh 7 is provided in proximity of each of the two interfaces dividing the above- mentioned layers 5 and 6.
  • the external surfaces of the flat structural element 1 are covered by a layer of rendering 11.
  • a plurality of connecting rods 8 are spot-welded in proximity of their ends to the external metal meshes 2, while a plurality of connecting wires 9 are spot-welded between the external metal meshes 2 and the adjacent internal metal mesh 7.
  • Both the rods 8 and the connecting wires have arched ends 10 which wind about the crosswires h of the external flat structural elements 1 or the internal metal mesh 7.
  • the internal metal meshes 7 connect with the concrete 6 layer while the external metal meshes 2 have, amongst other functions, that of reinforcing the rendering 11.
  • the construction phases of the prefabricated panel of figure 1 are the following:
  • the pressure exerted by the concrete against the polystyrene layers can, in traditional panels, break the welding on the connections uniting the external metal meshes 2 among themselves.
  • Figure 2 shows a panel without an intermediate layer of concrete, internal metal meshes and connecting wires.
  • the panel presents a flat structural element 21, comprising a layer of polystyrene 25 caged between two external metal meshes 22, with longitudinal wires 23 and corosswires 24, connected among themselves by metal connecting rods 28 provided with arched ends 30.
  • Figure 3 shows a section of a floor with a layer of polystyrene 31 caged between two metal meshes 32 connected to each other by transversal rods 33 provided with bent ends.
  • the panels, before laying and rendering, must be transported, which is generally done by laying them one on another or side-by-side.
  • the arching of the rods 8, 28 and the connecting wire 9 means that there are no spikes or live edges on the outside of the panel, thus facilitating the transport of the panels while at the same time safeguarding the operatives loading or unloading them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Panels For Use In Building Construction (AREA)

Abstract

The invention relates to a prefabricated panel for use in the construction industry, for making structures such as partitions, bearing walls, floors etc. It consists in a panel comprising connecting rods (8) to connect external metal meshes (5) solidly between the rods (8), which external metal meshes (2) constitute the frame of the panel, provided with arched ends (10) wound about the wires of the external metal meshes (2).

Description

A Prefabricated Structural Panel.
Description.
The invention relates to a prefabricated structural panel. In the construction industry panels of such type are widely used, and comprise a flat structural element made of two external layers of corrugated polystyrene separated by a space injected with concrete.
The polystyrene layers are caged, before the concrete is introduced, in a frame of metal meshes held together by welded metal rods. The external surfaces of the panel are then rendered.
A drawback present in panels of the above type is that the intermediate concrete generates a pressure that sometimes breaks the welding on the rods and weakens the panel.
The principal aim of the present invention is to obviate the above-mentioned drawback by providing a panel which is able to resist the pressure generated by the concrete between the panels and thus eliminate the breakage risks of the welding holding the metal mesh connecting rods in place. An advantage of the present invention is that the panel loading and unloading operations are made easier, since the panels exhibit no external points or edges obstructing the relative sliding of the panels and making them difficult to move.
Further characteristics and advantages of the present invention will better emerge from the detailed description that follows, of an embodiment of the invention, herein illustrated purely in the form of a non-limiting example in the accompanying figures, in which:
- figure 1 shows a schematic broken section made according to a horizontal plane of a bearing wall; figure 2 shows a schematic broken section made according to a horizontal plane of a partition wall;
- figure 3 shows a partial section of a floor.
With reference to figure 1, 1 denotes a flat structural element closed between a pair of external metal meshes 2 constituted by longitudinal wires 3 and crosswires 4 .
In figure 1 the flat structural element 1 is constituted by two layers of polystyrene 5 separated from each other by a layer of concrete 6. An internal metal mesh 7 is provided in proximity of each of the two interfaces dividing the above- mentioned layers 5 and 6.
The external surfaces of the flat structural element 1 are covered by a layer of rendering 11. A plurality of connecting rods 8 are spot-welded in proximity of their ends to the external metal meshes 2, while a plurality of connecting wires 9 are spot-welded between the external metal meshes 2 and the adjacent internal metal mesh 7.
Both the rods 8 and the connecting wires have arched ends 10 which wind about the crosswires h of the external flat structural elements 1 or the internal metal mesh 7.
The internal metal meshes 7 connect with the concrete 6 layer while the external metal meshes 2 have, amongst other functions, that of reinforcing the rendering 11.
The construction phases of the prefabricated panel of figure 1 are the following:
- meshing of the metal meshes 2 and 7 with the interposed polystyrene 5 layers, where the rods 8 and the connecting wires 9 are bent and spot- welded to the metal meshes 2 and 7;
- union of the two panels made as in the preceding phase, by means of rods 8 which are likewise welded and bent about the external metal meshes 2; injection of concrete to realise the intermediate layer 6.
During the concrete injection phase the pressure exerted by the concrete against the polystyrene layers can, in traditional panels, break the welding on the connections uniting the external metal meshes 2 among themselves.
The special conformation and arrangement of the ends of the rods 8 and the connecting wires 9 of the invention strengthens overall the panel and reduces to a minimum the risk of welding spot breakage on the external metal meshes 2.
Figure 2 shows a panel without an intermediate layer of concrete, internal metal meshes and connecting wires.
The panel presents a flat structural element 21, comprising a layer of polystyrene 25 caged between two external metal meshes 22, with longitudinal wires 23 and corosswires 24, connected among themselves by metal connecting rods 28 provided with arched ends 30.
Figure 3 shows a section of a floor with a layer of polystyrene 31 caged between two metal meshes 32 connected to each other by transversal rods 33 provided with bent ends.
The panels, before laying and rendering, must be transported, which is generally done by laying them one on another or side-by-side.
The arching of the rods 8, 28 and the connecting wire 9 means that there are no spikes or live edges on the outside of the panel, thus facilitating the transport of the panels while at the same time safeguarding the operatives loading or unloading them.

Claims

Claims.
1. A prefrabricated structural panel of the type comprising:
- a flat structural element (1), (21);
- a pair of external metal meshes (2), (22), constituted by longitudinal wires (3), (23) and crosswires (4), (24), predisposed on opposing faces of the flat structural element (1), (21); a plurality of connecting rods (8), (28), perpendicular to the external metal meshes (2) and solidly connected to the meshes (2) in proximity of ends of the connecting rods (8), (28); characterised in that each of the connecting rods (8) (28) is provided with two arched ends (10) (30), each of which arched ends (10), (30) winds about a corresponding wire of the external metal meshes (2), (22).
2. A panel as in claim 1, wherein a posterior side of the flat structural element (1) comprises two external layers of polystyrene (5) and one internal layer of concrete (6); two internal metal meshes (7) being provided, which meshes (7) are interposed between the layer- of concrete (6) and each of the layers of polystyrene (5); thet e also being provided a plurality of connecting wires (9), parallel to the connecting rods (8), each of which plurality of connecting wires (9) is solidly connected to one or another of the external metal meshes (2) and the internal metal mesh (7) adjacent to the external metal mesh (2);
characterised in that each of the connecting wires (9) is provided with an arched end (10) which winds about a corresponding wire of the external metal mesh (2).
PCT/IT1993/000126 1993-02-26 1993-12-02 A prefabricated structural panel WO1994019557A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPR93U000004 1993-02-26
ITPR930004 IT233319Y1 (en) 1993-02-26 1993-02-26  PREFABRICATED STRUCTURAL PANEL.

Publications (1)

Publication Number Publication Date
WO1994019557A1 true WO1994019557A1 (en) 1994-09-01

Family

ID=11395772

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1993/000126 WO1994019557A1 (en) 1993-02-26 1993-12-02 A prefabricated structural panel

Country Status (2)

Country Link
IT (1) IT233319Y1 (en)
WO (1) WO1994019557A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1146179A2 (en) * 2000-04-10 2001-10-17 Angelo Candiracci Pre-armed formwork building panel
EP1447488A1 (en) * 2003-02-11 2004-08-18 Kildare Developments Ltd. Prefabricated modules for use in the building industry
CN111535484A (en) * 2020-05-07 2020-08-14 唐方方 Integral spraying wall structure with inner and outer moulds

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2644738A1 (en) * 1975-10-03 1977-04-14 Heinrich Bernhard Unger PREFABRICATED LOST WALL SHAPE AND METHOD OF MAKING IT
DE8518321U1 (en) * 1984-07-02 1985-08-22 Impresa Costruzioni Candiracci S.p.A., Fano, Pesaro One-time formwork for the construction of partition and load-bearing walls
WO1989008755A1 (en) * 1988-03-14 1989-09-21 Miller Brian J Concrete forming system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2644738A1 (en) * 1975-10-03 1977-04-14 Heinrich Bernhard Unger PREFABRICATED LOST WALL SHAPE AND METHOD OF MAKING IT
DE8518321U1 (en) * 1984-07-02 1985-08-22 Impresa Costruzioni Candiracci S.p.A., Fano, Pesaro One-time formwork for the construction of partition and load-bearing walls
WO1989008755A1 (en) * 1988-03-14 1989-09-21 Miller Brian J Concrete forming system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1146179A2 (en) * 2000-04-10 2001-10-17 Angelo Candiracci Pre-armed formwork building panel
EP1146179A3 (en) * 2000-04-10 2003-09-24 Angelo Candiracci Pre-armed formwork building panel
EP1447488A1 (en) * 2003-02-11 2004-08-18 Kildare Developments Ltd. Prefabricated modules for use in the building industry
CN111535484A (en) * 2020-05-07 2020-08-14 唐方方 Integral spraying wall structure with inner and outer moulds

Also Published As

Publication number Publication date
ITPR930004U1 (en) 1994-08-26
ITPR930004V0 (en) 1993-02-26
IT233319Y1 (en) 2000-01-28

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