EP0744000A1 - Lattice-type beam for reinforcing cast walls or floors - Google Patents

Lattice-type beam for reinforcing cast walls or floors

Info

Publication number
EP0744000A1
EP0744000A1 EP95907501A EP95907501A EP0744000A1 EP 0744000 A1 EP0744000 A1 EP 0744000A1 EP 95907501 A EP95907501 A EP 95907501A EP 95907501 A EP95907501 A EP 95907501A EP 0744000 A1 EP0744000 A1 EP 0744000A1
Authority
EP
European Patent Office
Prior art keywords
longitudinal
sheet
truss
spacers
diagonal bars
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP95907501A
Other languages
German (de)
French (fr)
Inventor
Wilhelm Burger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0744000A1 publication Critical patent/EP0744000A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/065—Light-weight girders, e.g. with precast parts

Definitions

  • the invention relates to a truss for the reinforcement of walls or ceilings consisting of casting compounds, consisting of two longitudinal straps and diagonal bars running between them, the diagonal bars being formed by a steel strip which is bent in a zigzag shape and which extends at its bends with the same Sheet steel belts are connected to existing profiled longitudinal belts.
  • the invention has set itself the goal of creating a truss of the type mentioned that is easy to manufacture and still largely rigid.
  • a supporting structure should also be able to be formed from such trusses in a simple manner.
  • the width of the sheet steel strip of the diagonal bars which is also channel-shaped, and the width of the longitudinal straps extend transversely to the longitudinal center plane of the truss and that the steel sheet strip of the diagonal bars has a piece running parallel to the longitudinal straps in the region of the nodes.
  • the sheet steel strip can be obtained by cutting galvanized sheets and then deformed. Since the zinc also has the property of migrating to the cut edges, these cut edges are also protected against corrosion.
  • a structure made of truss girders according to the invention can be formed in a simple manner by spacing the longitudinal belts Have bores and at least two approximately parallel truss girders are connected by spacers also provided with bores by means of connecting elements seated in the bores, the spacers consisting of a galvanized sheet steel strip.
  • connection of the longitudinal belts to the spacers does not need to absorb large forces, it only serves to secure the truss girders inserted into a mold, a casting compound, in particular concrete or lightweight concrete, being subsequently poured into the mold.
  • the connecting members are designed as plastic plugs which have resilient tabs provided with a shoulder which spring into the bores when they are inserted and then spring back. Such plastic plugs only need to be pressed into the holes and then ensure the cohesion of the longitudinal belts with the spacers.
  • the plastic plugs can also be used by a simple measure to achieve a safe embedding of the structure in the casting compound.
  • This simple measure consists in the fact that the plastic plugs protrude beyond the spacers on the side opposite the tab. Therefore, the plastic plugs inevitably maintain a distance between the walls of the mold and the structure.
  • FIG. 1 shows a structure according to the invention made of truss girders and
  • FIG. 2 shows the side view of a truss girder.
  • FIG. 3 shows, on an enlarged scale, a section through the connection point between a longitudinal belt and a spacer.
  • a truss consists of two longitudinal straps 1 and 2 and diagonal bars 3 running between them. Both the longitudinal straps 1 and 2 and the diagonal bars 3 each consist of a galvanized sheet steel strip which is deformed in a channel shape.
  • the diagonal bars 3 are somewhat narrower than the longitudinal belts 1 and 2 and are formed by a continuous sheet steel strip which is connected to the longitudinal belts at the nodes 4 by pressing. The bulges formed during the pressing are denoted by 5 in FIG. 2.
  • the sheet steel strip of the diagonal bars 3 in the area of the nodes 4 has a parallel to the Longitudinal straps 1 and 2 extending piece in which the steel sheet band and the longitudinal straps 1, 2 are pressed together.
  • Truss girder interconnected by spacers 6 are of the same design as the longitudinal belts 1, i.e. they consist of a galvanized sheet steel strip and have the same shape and
  • Spacers 6 are made by means of plastic plugs 7, which have resilient tabs 8.
  • a shoulder 9 is provided in the area of the resilient tabs 8 and a cylindrical part 10 extends opposite the tabs 8 and ends in an all-round shoulder 11. In the area of the flap 8
  • Both the longitudinal belt 1 and the spacer 6 are provided with holes 12 through which the plastic plug 7 is inserted.
  • a kind of snap fastener can also be used to connect the spacers 6 to the longitudinal belts 1, 2.
  • the sheet steel strip can have further, but also other deformations or bends, by means of which the strength can be increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Load-Bearing And Curtain Walls (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

A lattice-type beam for reinforcing cast walls or floors consists of two longitudinal booms (1, 2) and diagonal rods (3) running between them, in which the diagonal rods (3) take the form of a sheet-steel strip bent zigzag fashion and running in the lattice-type beam which is secured at its bends to the booms (1, 2) which also consist of sheet-steel strips. The ensure simple production and great rigidity, the width of the trough-shaped sheet-steel strips of the diagonal rods (3) and the width of the booms (1, 2) extend transversaly to the central longitudinal plane of the beam and the sheet-steel strip of the diagonal rods (3) have a portion running parallel to the booms in the region of the connecting points (4).

Description

Fachwerksträger zur Bewehrung von aus Gußmassen bestehenden Wänden oder Decken Truss girder for the reinforcement of walls or ceilings made of casting compounds
Die Erfindung bezieht sich auf einen Fachwerksträger zur Bewehrung von aus Gußmassen bestehenden Wänden oder Decken, bestehend aus zwei Längsgurten und dazwischen verlaufenden Diagonalstäben, wobei die Diagonalstäbe durch ein im Fachwerksträger durchlaufendes, in Zickzackform gebogenes Stahlblechband gebildet sind, das an seinen Biegestellen mit den gleichfalls aus Stahlblechbändem bestehenden profilierten Längsgurten verbunden ist.The invention relates to a truss for the reinforcement of walls or ceilings consisting of casting compounds, consisting of two longitudinal straps and diagonal bars running between them, the diagonal bars being formed by a steel strip which is bent in a zigzag shape and which extends at its bends with the same Sheet steel belts are connected to existing profiled longitudinal belts.
Bei einem aus der DE-PS 835 647 bekannten Fachwerksträger dieser Art verläuft das durchgehende Stahlblechband der Diagonalstäbe derart, daß die Breite des Bandes parallel zur Ebene des Fachwerksträgers liegt. Dies erschien dem Erfinder offenbar erforderlich, um eine Verbindung von Längsgurten und Diagonalstäben nur durch Klemmung zu erreichen. Nachteilig dabei ist allerdings die mangelnde Steifheit des Fachwerksträgers in Querrichtung, die sich insbesondere auch beim Transport auswirkt.In a truss of this type known from DE-PS 835 647, the continuous sheet steel strip of the diagonal bars runs in such a way that the width of the strip is parallel to the level of the truss. This appeared to the inventor apparently necessary in order to achieve a connection of longitudinal belts and diagonal bars only by clamping. The disadvantage here, however, is the lack of stiffness of the truss in the transverse direction, which also has an effect particularly during transport.
Die Erfindung hat es sich zum Ziel gesetzt, einen Fachwerksträger der eingangs genannten Art zu schaffen, der einfach herzustellen und trotzdem weitgehend steif ist. Aus solchen Fachwerksträgern soll überdies auf einfache Weise ein Tragwerk gebildet werden können.The invention has set itself the goal of creating a truss of the type mentioned that is easy to manufacture and still largely rigid. A supporting structure should also be able to be formed from such trusses in a simple manner.
Erreicht wird dies dadurch, daß die Breite des ebenfalls rinnenförmig ausgebildeten Stahlblechbandes der Diagonalstäbe und die Breite der Längsgurte sich quer zur Längsmittelebene des Fachwerksträgers erstreckt und daß das Stahlblechband der Diagonalstäbe im Bereich der Knotenpunkte ein parallel zu den Längsgurten verlaufendes Stück aufweist.This is achieved in that the width of the sheet steel strip of the diagonal bars, which is also channel-shaped, and the width of the longitudinal straps extend transversely to the longitudinal center plane of the truss and that the steel sheet strip of the diagonal bars has a piece running parallel to the longitudinal straps in the region of the nodes.
Das Stahlblechband kann durch Abschneiden von verzinkten Blechen erhalten und anschließend verformt werden. Da das Zink die Eigenschaft hat, auch zu den Schnittkanten zu wandern, sind auch diese Schnittkanten korrosionsgeschützt.The sheet steel strip can be obtained by cutting galvanized sheets and then deformed. Since the zinc also has the property of migrating to the cut edges, these cut edges are also protected against corrosion.
Zur Verbindung der Diagonalstäbe mit den Längsgurten hat es sich als zweckmäßig erwiesen, wenn das durchgehende Stahlblechband der Diagonalstäbe an den Knotenpunkten durch Verpressen mit den Längsgurten verbunden ist.To connect the diagonal bars to the longitudinal belts, it has proven to be expedient if the continuous steel strip of the diagonal bars is connected to the longitudinal belts by pressing at the nodes.
Ein Tragwerk aus erfindungsgemäßen Fachwerksträgern kann auf einfache Weise dadurch gebildet werden, daß die Längsgurten in Abständen Bohrungen aufweisen und wenigstens zwei annähernd parallel verlaufende Fachwerksträger durch ebenfalls mit Bohrungen versehene Abstandshalter mittels in den Bohrungen sitzenden Verbindungsorganen verbunden sind, wobei die Abstandshalter aus einem verzinkten Stahlblechband bestehen. Zur Vereinfachung der Herstellung und Lagerhaltung sind dabei dieA structure made of truss girders according to the invention can be formed in a simple manner by spacing the longitudinal belts Have bores and at least two approximately parallel truss girders are connected by spacers also provided with bores by means of connecting elements seated in the bores, the spacers consisting of a galvanized sheet steel strip. To simplify production and warehousing,
Stahlblechbänder der Längsgurte und der Abstandshalter gleich ausgebildet.Steel strips of the longitudinal belts and the spacers are of the same design.
Die Verbindung der Längsgurte mit den Abstandshaltern braucht keine großen Kräfte aufzunehmen, sie dient nur dem Sichern der in eine Form eingelegten Fachwerksträger, wobei in die Form anschließend eine Gußmasse, insbesondere Beton oder Leichtbeton, eingegossen wird. Es ist daher möglich, daß die Verbindungsorgane als Kunststoffstöpsel ausgebildet sind, die federnde, mit einem Absatz versehene Lappen aufweisen, die beim Einschieben in die Bohrungen ein- und anschließend rückfedern. Solche Kunststoffstöpsel brauchen in die Bohrungen lediglich eingedrückt zu werden und sichern anschließend den Zusammenhalt der Längsgurte mit den Abstandshaltern.The connection of the longitudinal belts to the spacers does not need to absorb large forces, it only serves to secure the truss girders inserted into a mold, a casting compound, in particular concrete or lightweight concrete, being subsequently poured into the mold. It is therefore possible that the connecting members are designed as plastic plugs which have resilient tabs provided with a shoulder which spring into the bores when they are inserted and then spring back. Such plastic plugs only need to be pressed into the holes and then ensure the cohesion of the longitudinal belts with the spacers.
Die Kunststoffstöpsel können durch eine einfache Maßnahme auch dazu benutzt werden, eine sichere Einbettung des Tragwerkes in die Gußmasse zu erreichen. Diese einfache Maßnahme besteht darin, daß die Kunststoffstöpsel auf der den Lappen gegenüberliegenden Seite über die Abstandshalter hinausragen. Es wird daher durch die Kunststoffstöpsel zwangsläufig ein Abstand zwischen den Wänden der Gußform und dem Tragwerk eingehalten.The plastic plugs can also be used by a simple measure to achieve a safe embedding of the structure in the casting compound. This simple measure consists in the fact that the plastic plugs protrude beyond the spacers on the side opposite the tab. Therefore, the plastic plugs inevitably maintain a distance between the walls of the mold and the structure.
Nachstehend ist die Erfindung anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher beschrieben. Dabei zeigt Fig. 1 in Ansicht ein erfindungsgemäßes Tragwerk aus Fachwerksträgern und Fig. 2 stellt die Seitenansicht eines Fachwerksträgers dar. Fig. 3 gibt im vergrößerten Maßstab einen Schnitt durch die Verbindungsstelle zwischen einem Längsgurt und einem Abstandshalter wieder.The invention is described below with reference to an embodiment shown in the drawings. 1 shows a structure according to the invention made of truss girders and FIG. 2 shows the side view of a truss girder. FIG. 3 shows, on an enlarged scale, a section through the connection point between a longitudinal belt and a spacer.
Gemäß den Zeichnungen besteht ein Fachwerksträger aus zwei Längsgurten 1 und 2 und dazwischen verlaufenden Diagonalstäben 3. Sowohl die Längsgurte 1 und 2 als auch die Diagonalstäbe 3 bestehen aus je einem verzinkten Stahlblechband, das rinnenförmig verformt ist. Die Diagonalstäbe 3 sind dabei etwas schmäler als die Längsgurte 1 und 2 und werden von einem durchgehenden Stahlblechband gebildet, das an den Knotenpunkten 4 durch Verpressen mit den Längsgurten verbunden ist. Die beim Verpressen entstehenden Ausbuchtungen sind in Fig. 2 mit 5 bezeichnet.According to the drawings, a truss consists of two longitudinal straps 1 and 2 and diagonal bars 3 running between them. Both the longitudinal straps 1 and 2 and the diagonal bars 3 each consist of a galvanized sheet steel strip which is deformed in a channel shape. The diagonal bars 3 are somewhat narrower than the longitudinal belts 1 and 2 and are formed by a continuous sheet steel strip which is connected to the longitudinal belts at the nodes 4 by pressing. The bulges formed during the pressing are denoted by 5 in FIG. 2.
Wie aus Fig. 1 ersichtich ist, weist das Stahlblechband der Diagonalstäbe 3 im Bereich der Knotenpunkte 4 ein parallel zu den Längsgurten 1 und 2 verlaufendes Stück auf, in dem das Stahlblechband und die Längsgurte 1 , 2 miteinander verpreßt sind.As can be seen from FIG. 1, the sheet steel strip of the diagonal bars 3 in the area of the nodes 4 has a parallel to the Longitudinal straps 1 and 2 extending piece in which the steel sheet band and the longitudinal straps 1, 2 are pressed together.
Gemäß Fig. 1 sind die Längsgurte 1 zweier parallel verlaufender1, the longitudinal belts 1 of two are parallel
Fachwerksträger durch Abstandshalter 6 miteinander verbunden. Diese Abstandshalter 6 sind gleich ausgebildet wie die Längsgurte 1, d.h. sie bestehen aus einem verzinkten Stahlblechband und haben die gleiche Form undTruss girder interconnected by spacers 6. These spacers 6 are of the same design as the longitudinal belts 1, i.e. they consist of a galvanized sheet steel strip and have the same shape and
Größe wie die Längsgurte 1.Size like the longitudinal straps 1.
Die in Fig. 3 dargestellte Verbindung der Längsgurte 1 mit denThe connection of the longitudinal belts 1 shown in Fig. 3 with the
Abstandshaltern 6 erfolgt mittels Kunststoffstöpseln 7, die federnde Lappen 8 aufweisen. Im Bereich der federnden Lappen 8 ist ein Absatz 9 vorgesehen und gegenüberliegend den Lappen 8 erstreckt sich ein zylindrischer Teil 10, der in einem rundum laufenden Absatz 11 endet. Im Bereich der Lappen 8 ist derSpacers 6 are made by means of plastic plugs 7, which have resilient tabs 8. A shoulder 9 is provided in the area of the resilient tabs 8 and a cylindrical part 10 extends opposite the tabs 8 and ends in an all-round shoulder 11. In the area of the flap 8
Kunststoffstöpsel 7 geschlitzt.Slotted plastic plug 7.
Sowohl der Längsgurt 1 als auch der Abstandshalter 6 ist mit Bohrungen 12 versehen, durch die der Kunststoff Stöpsel 7 durchgesteckt ist. BeimBoth the longitudinal belt 1 and the spacer 6 are provided with holes 12 through which the plastic plug 7 is inserted. At the
Einstecken des Kunststoffstöpsel 7 in die Bohrungen 12 werden die Lappen 8 gegeneinander gedrückt, sodaß der Kunststoffstöpsel 7 durchgesteckt werden kann. Nach Erreichen der in Fig. 3 gezeigten Endlage federn die Lappen 8 zurück, sodaß sich der Absatz 9 gegen den Längsgurt 1 legt. Der Absatz 1 1 liegt gegen den Abstandshalter 6 an, sodaß eine sichere Verbindung vonInserting the plastic plug 7 into the holes 12, the tabs 8 are pressed against each other, so that the plastic plug 7 can be inserted. After reaching the end position shown in Fig. 3, the tab 8 spring back, so that the paragraph 9 lies against the longitudinal belt 1. The paragraph 1 1 is against the spacer 6, so that a secure connection from
Längsgurt 1 und Abstandshalter 6 gegeben ist.Longitudinal belt 1 and spacer 6 is given.
Im Rahmen der Erfindung sind zahlreiche Abänderungen möglich. So kann zur Verbindung der Abstandshalter 6 mit den Längsgurten 1, 2 z.B auch eine Art Druckknopfverschluß angewendet werden. Das Stahlblechband kann weitere, aber auch andere Verformungen bzw. Abkantungen aufweisen, durch die die Festigkeit gesteigert werden kann. Numerous modifications are possible within the scope of the invention. For example, a kind of snap fastener can also be used to connect the spacers 6 to the longitudinal belts 1, 2. The sheet steel strip can have further, but also other deformations or bends, by means of which the strength can be increased.

Claims

Patentansprüche claims
1. Fachwerksträger zur Bewehrung von aus Gußmassen bestehenden Wänden oder Decken, bestehend aus zwei Längsgurten (1,2) und dazwischen verlaufenden Diagonalstäben (3), wobei die Diagonalstäbe (3) durch ein im Fachwerksträger durchlaufendes, in Zickzackform gebogenes Stahlblechband gebildet sind, das an seinen Biegestellen mit den gleichfalls aus Stahlblechbändern bestehenden profilierten Längsgurten (1,2) verbunden ist, dadurch gekennzeichnet, daß die Breite des ebenfalls rinnenförmig ausgebildeten Stahlblechbandes der Diagonalstäbe (3) und die Breite der Längsgurte (1,2) sich quer zur Längsmittelebene des Fachwerksträgers erstreckt und daß das Stahlblechband der Diagonalstäbe (3) im Bereich der Knotenpunkte (4) ein parallel zu den Längsgurten verlaufendes Stück aufweist.1. Truss girder for the reinforcement of walls or ceilings consisting of casting compounds, consisting of two longitudinal chords (1,2) and diagonal bars (3) running between them, the diagonal bars (3) being formed by a steel sheet band which is curved in a zigzag shape and which runs through the truss is connected at its bending points to the profiled longitudinal belts (1, 2) also consisting of sheet steel strips, characterized in that the width of the sheet-steel strip of the diagonal bars (3), which is also channel-shaped, and the width of the longitudinal straps (1, 2) are transverse to the longitudinal center plane of the Truss girder extends and that the steel strip of the diagonal bars (3) in the area of the nodes (4) has a piece running parallel to the longitudinal belts.
2. Fachwerksträger nach Anspruch 1, dadurch gekennzeichnet, daß das durchgehende Stahlblechband der Diagonalstäbe (3) an den Knotenpunkten (4) durch Verpressen mit den Längsgurten (1,2) verbunden ist.2. truss according to claim 1, characterized in that the continuous steel sheet of the diagonal bars (3) at the nodes (4) is connected by pressing with the longitudinal belts (1,2).
3. Tragwerk aus Fachwerksträgern nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Längsgurten (1,2) in Abständen Bohrungen (12) aufweisen und wenigstens zwei annähernd parallel verlaufende Fachwerksträger durch ebenfalls mit Bohrungen (12) versehene Abstandshalter (6) mittels in den Bohrungen sitzenden Verbindungsorganen (7) verbunden sind, wobei die Abstandshalter (6) aus verzinktem Stahlblechband bestehen.3. Structure made of trusses according to claim 1 or 2, characterized in that the longitudinal belts (1, 2) have bores (12) at intervals and at least two approximately parallel truss girders by means of spacers (6) also provided with bores (12) by means of connecting elements (7) which are seated in the bores, the spacers (6) being made of galvanized sheet steel strip.
4. Tragwerk nach Anspruch 3, dadurch gekennzeichnet, daß die Stahlblechbänder der Längsgurte (1,2) und der Abstandshalter (6) gleich ausgebildet sind.4. Structure according to claim 3, characterized in that the steel strips of the longitudinal belts (1,2) and the spacers (6) are of identical design.
5. Tragwerk nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Verbindungsorgane als Kunststoffstöpsel (7) ausgebildet sind, die federnde, mit einem Absatz (9) versehene Lappen (8) aufweisen, die beim Einschieben in die Bohrungen (12) ein- und anschließend rückfedern. 5. Structure according to claim 3 or 4, characterized in that the connecting members are designed as plastic plugs (7) which have resilient, with a shoulder (9) provided tabs (8) which when inserted into the bores (12) and then spring back.
6. Tragwerk nach Anspruch 5, dadurch gekennzeichnet, daß die6. Structure according to claim 5, characterized in that the
Kunststoffstöpsel (7) auf der den Lappen (8) gegenüberliegenden Seite über die Abstandshalter (6) hinausragen. Plastic plugs (7) protrude beyond the spacers (6) on the side opposite the tabs (8).
EP95907501A 1994-02-10 1995-02-09 Lattice-type beam for reinforcing cast walls or floors Withdrawn EP0744000A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0026894A AT403602B (en) 1994-02-10 1994-02-10 SPECIALTY RACK FOR REINFORCING WALLS OR CEILINGS
AT268/94 1994-02-10
PCT/AT1995/000028 WO1995021973A1 (en) 1994-02-10 1995-02-09 Lattice-type beam for reinforcing cast walls or floors

Publications (1)

Publication Number Publication Date
EP0744000A1 true EP0744000A1 (en) 1996-11-27

Family

ID=3486026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95907501A Withdrawn EP0744000A1 (en) 1994-02-10 1995-02-09 Lattice-type beam for reinforcing cast walls or floors

Country Status (10)

Country Link
US (1) US5974759A (en)
EP (1) EP0744000A1 (en)
JP (1) JPH09508684A (en)
AT (1) AT403602B (en)
AU (1) AU1570395A (en)
CA (1) CA2183105A1 (en)
DE (1) DE9404142U1 (en)
IL (1) IL109019A (en)
RU (1) RU2144120C1 (en)
WO (1) WO1995021973A1 (en)

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Also Published As

Publication number Publication date
IL109019A (en) 1997-06-10
RU2144120C1 (en) 2000-01-10
DE9404142U1 (en) 1994-07-21
CA2183105A1 (en) 1995-08-17
JPH09508684A (en) 1997-09-02
WO1995021973A1 (en) 1995-08-17
AT403602B (en) 1998-04-27
US5974759A (en) 1999-11-02
ATA26894A (en) 1997-08-15
IL109019A0 (en) 1994-06-24
AU1570395A (en) 1995-08-29

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