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EP0027832A1 - Three-dimensional lattice girder - Google Patents

Three-dimensional lattice girder Download PDF

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Publication number
EP0027832A1
EP0027832A1 EP79104219A EP79104219A EP0027832A1 EP 0027832 A1 EP0027832 A1 EP 0027832A1 EP 79104219 A EP79104219 A EP 79104219A EP 79104219 A EP79104219 A EP 79104219A EP 0027832 A1 EP0027832 A1 EP 0027832A1
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EP
European Patent Office
Prior art keywords
sheet metal
metal rail
lattice girder
concrete
side walls
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.)
Granted
Application number
EP79104219A
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German (de)
French (fr)
Other versions
EP0027832B1 (en
Inventor
Peter Dr. Schiessl
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.)
Cessione kaiser - Omnia Bausysteme Vetriebsgesells
Original Assignee
Kaiser-Omnia Bausysteme & Co GmbH
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 Kaiser-Omnia Bausysteme & Co GmbH filed Critical Kaiser-Omnia Bausysteme & Co GmbH
Priority to DE7979104219T priority Critical patent/DE2964741D1/en
Priority to AT79104219T priority patent/ATE2453T1/en
Priority to EP79104219A priority patent/EP0027832B1/en
Priority to NO801928A priority patent/NO801928L/en
Publication of EP0027832A1 publication Critical patent/EP0027832A1/en
Application granted granted Critical
Publication of EP0027832B1 publication Critical patent/EP0027832B1/en
Expired legal-status Critical Current

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    • 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 spatial lattice girder with an upper chord, designed as an upwardly open sheet metal rail with a bottom and with side walls for receiving concrete, on the side walls of which diagonals are welded from the outside, which connect the upper chord to a lower chord bar.
  • Such a spatial lattice girder is described in DE-PS 2 427 168.
  • the trough-shaped sheet metal rail is smooth.
  • the free edge sections of the side walls of the sheet metal rail are first widened outwards and then drawn inwards.
  • the side walls of the sheet metal rail taper upwards, so that the diagonals are spread apart in an end view of the lattice girder.
  • this lattice girder To produce this lattice girder, a welding electrode is inserted into the sheet metal rail, which completely fills its free cross section.
  • the distance between the upper edges of the sheet metal rail is there in the order of 1 to 2 cm.
  • this has the disadvantage that only a concrete with fine-grained aggregates and a relatively large amount of water can be poured into this very narrow sheet metal rail.
  • such concrete is characterized by a relatively large shrinkage when setting. Because the walls of the sheet metal rail are smooth in the longitudinal direction, there is therefore a risk that the set concrete rod will come loose from the bond with the sheet metal rail with only slight loads. Because of the poor bond between sheet metal rail and concrete and the small concrete cross section in the In the top chord, the mounting span on this lattice girder is only slightly increased by the concrete filling.
  • CH-PS 391 245 describes a similar spatial lattice girder.
  • a diagonal is welded there to the bottom of a sheet metal rail.
  • This lattice girder is therefore not sufficiently stiffened in the lateral direction, so that no larger spans can be achieved with loads in the direction of its height.
  • the substantially U-shaped profiled sheet metal rail has waves on its inner surface which are intended to increase the surface area and thus to increase the bond strength with a pressure-resistant material inserted into the sheet metal rail.
  • Profiling of the sheet metal rail is recommended there in such a way that the side flanks of the sheet metal rail run back approximately semicircularly into the interior of the sheet metal rail.
  • DE-OS 2 446 733 describes a composite ceiling consisting of a tension belt consisting of steel and also serving as formwork and a pressure belt consisting of concrete.
  • a tension belt consisting of steel
  • a pressure belt consisting of concrete.
  • the surfaces of the steel plates facing the concrete are provided with knobs. These knobs thus serve to improve the bond in the area of a tension element of a continuous rib ceiling.
  • the object of the invention is to further develop it in such a way that the mounting span is significantly improved by improving the bond between the sheet metal rail and the concrete inserted and solidified into the sheet metal rail under loads in all directions.
  • the invention is characterized in that the sheet metal rail is provided over its length with spaced projections, and that the distance between the upper edges of the sheet metal rail is so large that a concrete with additives of conventional grain sizes are entered into the sheet metal rail can.
  • the volume of the concrete entered into the sheet metal rail is considerably increased in all directions.
  • the result is a spatial lattice girder, the stability and compressive strength of which is considerably increased in all directions in the upper chord area, by an inexpensive material, namely concrete.
  • a prerequisite for increased stability is the bond between sheet metal rail and concrete that goes beyond mere adhesion. This requirement is created by the projections, which are distributed over the length of the sheet metal rail and which continuously absorb the shear forces between the concrete and the sheet metal rail. This makes it possible to fully utilize the load-bearing capacity of the composite body.
  • the distance between the upper edges of the sheet metal rail should be of the order of at least 8 cm, so that a concrete with additives of conventional grain sizes can be entered.
  • the side walls of the sheet metal rail are inclined in a manner known per se to the interior of the sheet metal rail and their upper edges are angled inwards. This also improves the bond between the concrete and the sheet metal rail when the load is applied in the vertical direction. So that the shear-resistant bond achieved by the specified measures is retained even with larger loads, a certain kink resistance must be ensured for the sheet metal rail.
  • the bottom of the sheet metal rail has a continuous bead in the longitudinal direction. The bending of the sheet metal rail serves the same purpose.
  • the projections can be designed in several ways, for example as tongues or knobs. It is preferred if the projections are designed as knobs pointing into the interior of the sheet metal rail, as is known per se, because this results in high shear areas on the knobs.
  • An upper chord 1 consists of a support-shaped sheet metal rail with a bottom 2 and side walls 3. Diagonals 4 are welded to the outer sides of the side walls 3. In the exemplary embodiment shown, these are wave-shaped, as can best be seen in FIG. 2. In the area of the lower ends of the diagonals, lower chord rods 5 are welded to the diagonals.
  • the bottom 2 and the side walls 3 of the upper flange have knobs 6 which are arranged at intervals from one another and point into the interior of the sheet metal rail.
  • the clear distance 7 between the upper edges 8 of the side walls 3 of the upper chord is of the order of at least 8 cm.
  • a concrete 9 with additives of usual grain sizes is entered into the sheet metal rail.
  • the sheet metal rail can also have bevels 10 on the upper edges of the side walls 3, in the base 2 a continuous bead 11 in the longitudinal direction or other conventional stiffeners in the longitudinal and / or transverse direction.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

1. Three-dimensional lattice girder comprising an upperflange (1) in the form of a sheet metal rail open at the top and having a bottom (2) and side walls (3) for receiving concrete (9), to which side walls (3) there are welded from outside diagonals (4) which connect the upperflange (1) to respective lower flange bars (5), characterised in that the sheet metal rail is provided over its length with projections which are spaced apart both in the longitudinal direction and in the transverse direction of the sheet metal rail and which project into the interior of the sheet metal rail, and that the distance (7) between the upper edges (8) of the sheet metal rail amounts to at least 8 cm, so that a concrete containing aggregate of customary particle size can be introduced into the sheet metal rail.

Description

Die Erfindung betrifft einen räumlichen Gitterträger mit einem Obergurt, ausgebildet als nach oben offene Blechschiene mit einem Boden und mit Seitenwänden zur Aufnahme von Beton, an deren Seitenwände von außen Diagonalen angeschweißt sind, die den Obergurt mit jeweils einem Untergurtstab verbinden.The invention relates to a spatial lattice girder with an upper chord, designed as an upwardly open sheet metal rail with a bottom and with side walls for receiving concrete, on the side walls of which diagonals are welded from the outside, which connect the upper chord to a lower chord bar.

Einen derartigen räumlichen Gitterträger beschreibt die DE-PS 2 427 168. In Längsrichtung des Gitterträgers ist die rinnenförmige Blechschiene glatt ausgebildet. In Querrichtung sind die freien Randabschnitte der Seitenwände der Blechschiene zunächst nach außen erweitert und dann nach innen eingezogen. Die Seitenwände der Blechschiene verjüngen sich nach oben, so daß die Diagonalen in einer Stirnansicht des Gitterträgers gespreizt sind.Such a spatial lattice girder is described in DE-PS 2 427 168. In the longitudinal direction of the lattice girder, the trough-shaped sheet metal rail is smooth. In the transverse direction, the free edge sections of the side walls of the sheet metal rail are first widened outwards and then drawn inwards. The side walls of the sheet metal rail taper upwards, so that the diagonals are spread apart in an end view of the lattice girder.

Zur Herstellung dieses Gitterträgers wird in die Blechschiene eine Schweißelektrode eingeführt, die deren freien Querschnitt vollständig ausfüllt. Der Abstand zwischen den oberen Kanten der Blechschiene liegt dort somit in der Größenordnung von 1 bis 2 cm. Damit ist aber der Nachteil verbunden, daß nur ein Beton mit feinkörnigen Zuschlagstoffen und verhältnismäßig großem Wasseranteil in diese sehr schmale Blechschiene eingefüllt werden kann. Ein solcher Beton zeichnet sich aber durch einen relativ großen Schwund beim Abbinden aus. Weil in Längsrichtung der Blechschiene deren Wände glatt sind, besteht somit die Gefahr, daß sich der abgebundene Betonstab bei nur geringen Belastungen aus dem Verbund mit der Blechschiene löst. Wegen des mangelhaften Verbundes zwischen Blechschiene und Beton und des geringen Betonquerschnitts im im Obergurt wird die Montagestützweite bei diesem Gitterträger durch die Betonfüllung nur geringfügig erhöht.To produce this lattice girder, a welding electrode is inserted into the sheet metal rail, which completely fills its free cross section. The distance between the upper edges of the sheet metal rail is there in the order of 1 to 2 cm. However, this has the disadvantage that only a concrete with fine-grained aggregates and a relatively large amount of water can be poured into this very narrow sheet metal rail. However, such concrete is characterized by a relatively large shrinkage when setting. Because the walls of the sheet metal rail are smooth in the longitudinal direction, there is therefore a risk that the set concrete rod will come loose from the bond with the sheet metal rail with only slight loads. Because of the poor bond between sheet metal rail and concrete and the small concrete cross section in the In the top chord, the mounting span on this lattice girder is only slightly increased by the concrete filling.

Einen ähnlichen räumlichen Gitterträger beschreibt die CH-PS 391 245. Eine Diagonale ist dort an den Boden einer Blechschiene angeschweißt. Dieser Gitterträger ist somit in seitlicher Richtung nicht genügend ausgesteift, so daß bei Belastungen in Richtung seiner Höhe keine größeren Stützweiten erreicht werden können. Bei einigen Ausführungsformen weist die im wesentlichen U-förmig profilierte Blechschiene an ihrer Innenfläche Wellen auf, die zur Vergrößerung der Oberfläche und somit zur Erhöhung der Verbundfestigkeit mit einem in die Blechschiene eingegebenen druckfesten Stoff dienen sollen. Es werden dort Profilierungen der Blechschiene derart empfohlen, daß die Seitenflanken der Blechschiene etwa halbkreisförmig in das Innere der Blechschiene zurückgebogen verlaufen. Hierdurch bedingt stehen auch dort nur geringe Abstände zwischen den Kanten der Blechschiene 21r den Einfüllvorgang mit Beton zur Verfügung, so daß auch dort - ähnlich wie bei der vorstehend erwähnten DE-PS 2 427 168 - nur ein Beton mit hohem Wassergehalt und feinkörnigen Zuschlagstoffen eingefüllt werden kann. Bei Belastungen löst sich somit der Beton von der Blechschiene wegen fehlender Verbundelemente in Längsrichtung.CH-PS 391 245 describes a similar spatial lattice girder. A diagonal is welded there to the bottom of a sheet metal rail. This lattice girder is therefore not sufficiently stiffened in the lateral direction, so that no larger spans can be achieved with loads in the direction of its height. In some embodiments, the substantially U-shaped profiled sheet metal rail has waves on its inner surface which are intended to increase the surface area and thus to increase the bond strength with a pressure-resistant material inserted into the sheet metal rail. Profiling of the sheet metal rail is recommended there in such a way that the side flanks of the sheet metal rail run back approximately semicircularly into the interior of the sheet metal rail. As a result of this, there are only small distances between the edges of the sheet metal rail 21r for the filling process with concrete, so that only a concrete with a high water content and fine-grained aggregates can be filled in there - similar to the aforementioned DE-PS 2 427 168 can. In the event of loads, the concrete is detached from the sheet metal rail due to the lack of longitudinal composite elements.

Die DE-OS 2 446 733 beschreibt eine Verbunddecke, bestehend aus einem aus Stahl bestehenden und zugleich als Schalung dienenden Zuggurt und einem aus Beton bestehenden Druckgurt. Zur Erhöhung des Verbundes zwischen den profilierten Stahlplatten und dem Beton sind dort die dem Beton zugekehrten Flächen der Stahlplatten mit Noppen versehen. Diese Noppen dienen somit zur Verbesserung des Verbundes im Bereich eines Zugelementes einer durchgehenden Rippendecke.DE-OS 2 446 733 describes a composite ceiling consisting of a tension belt consisting of steel and also serving as formwork and a pressure belt consisting of concrete. To increase the bond between the profiled steel plates and the concrete, the surfaces of the steel plates facing the concrete are provided with knobs. These knobs thus serve to improve the bond in the area of a tension element of a continuous rib ceiling.

Ausgehend von einem räumlichen Gitterträger der eingangs genannten Art liegt der Erfindung die Aufgabe zugrunde, diesen dahingehendweiterzuentwickeln, daß die Montagestützweite durch Verbesserung des Verbundes zwischen der Blechschiene und dem in die Blechschiene eingegebenen und verfestigten Beton bei Belastungen in allen Richtungen wesentlich verbessert wird.Starting from a spatial lattice girder of the type mentioned, the object of the invention is to further develop it in such a way that the mounting span is significantly improved by improving the bond between the sheet metal rail and the concrete inserted and solidified into the sheet metal rail under loads in all directions.

Zur Lösung dieser Aufgabe ist die Erfindung dadurch gekennzeichnet, daß die Blechschiene über ihre Länge mit unter Abständen angeordneten Vorsprüngen versehen ist, und daß der Abstand zwischen den oberen Kanten der Blechschiene so groß ist, daß ein Beton mit Zuschlagstoffen üblicher Korngrößen in die Blechschiene eingegeben werden kann.To achieve this object, the invention is characterized in that the sheet metal rail is provided over its length with spaced projections, and that the distance between the upper edges of the sheet metal rail is so large that a concrete with additives of conventional grain sizes are entered into the sheet metal rail can.

Verglichen mit dem gattungsbildenden räumlichen Gitterträger nach der DE-PS 2 427 168 wird dadruch das Volumen des in die Blechschiene eingegebenen Betons in allen Richtungen beträchtlich vergrößert. Es ergibt sich somit ein räumlicher Gitterträger, dessen Stabilität und Druckfestigkeit im Obergurtbereich in allen Richtungen beträchtlich erhöhttsind, und zwar durch ein preisgünstiges Material, nämlich Beton. Voraussetzung für die erhöhte Stabilität ist der über die bloße Adhäsion hinausgehende Verbund zwischen Blechschiene und Beton. Diese Voraussetzung wird geschaffen durch die Vorsprünge, die über die Länge der Blechschiene verteilt sind und die die Schubkräfte zwischen Beton und Blechschiene kontinuierlich aufnehmen. Dadurch ist es möglich, die Tragkraft des Verbundkörpers voll auszunutzen.Compared to the generic spatial lattice girder according to DE-PS 2 427 168, the volume of the concrete entered into the sheet metal rail is considerably increased in all directions. The result is a spatial lattice girder, the stability and compressive strength of which is considerably increased in all directions in the upper chord area, by an inexpensive material, namely concrete. A prerequisite for increased stability is the bond between sheet metal rail and concrete that goes beyond mere adhesion. This requirement is created by the projections, which are distributed over the length of the sheet metal rail and which continuously absorb the shear forces between the concrete and the sheet metal rail. This makes it possible to fully utilize the load-bearing capacity of the composite body.

Der Abstand zwischen den oberen Kanten der Blechschiene soll in der Größenordnung von wenigstens 8 cm liegen, so daß ein Beton mit Zuschlagstoffen üblicher Korngrößen eingegeben werden kann.The distance between the upper edges of the sheet metal rail should be of the order of at least 8 cm, so that a concrete with additives of conventional grain sizes can be entered.

Bevorzugt wird es außerdem, wenn dieSeitenwände der Blechschiene in an sich bekannter Weise zum Innenraum der Blechschiene geneigt sind und ihre Oberkanten nach innen abgewinkelt sind. Auch dadurch wird der Verbund zwischen Beton und Blechschiene bei Beanspruchung in lotrechter Richtung verbessert. Damit der durch die angegebenen Maßnahmen erzielte schubfeste Verbund auch bei größeren Belastungen erhalten bleibt, muß bei der Blechschiene eine bestimmte Knickfestigkeit gesichert sein. Um den erforderlichen Wert auch bei kleinen Blechstärken zu gewährleisten, ist es zweckmäßig, wenn der Boden der Blechschiene eine in Längsrichtung durchgehende Sicke hat. Demselben Zweck dienen auch die Abwinkelungen der Blechschiene.It is also preferred if the side walls of the sheet metal rail are inclined in a manner known per se to the interior of the sheet metal rail and their upper edges are angled inwards. This also improves the bond between the concrete and the sheet metal rail when the load is applied in the vertical direction. So that the shear-resistant bond achieved by the specified measures is retained even with larger loads, a certain kink resistance must be ensured for the sheet metal rail. In order to ensure the required value even with small sheet thicknesses, it is expedient if the bottom of the sheet metal rail has a continuous bead in the longitudinal direction. The bending of the sheet metal rail serves the same purpose.

Die Vorsprünge können auf mehrere Arten ausgebildet sein, beispielsweise als Zungen oder Noppen. Bevorzugt wird es, wenn die Vorsprünge als in den Innenraum der Blechschiene weisende-Noppen ausgebildet sind, wie dies an sich bekannt ist, weil sich dadurch hohe Scherflächen an den Noppen ergeben.The projections can be designed in several ways, for example as tongues or knobs. It is preferred if the projections are designed as knobs pointing into the interior of the sheet metal rail, as is known per se, because this results in high shear areas on the knobs.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels näher erläutert, aus dem sich weitere wichtige Merkmale ergeben. Es zeigt:

  • Fig. 1 eine Stirnansicht eines räumlichen Gitterträgers mit in die Blechschiene eingefülltem Beton;
  • Fig. 2 perspektivisch den Gitterträger nach Fig. 1.
The invention is explained in more detail below on the basis of an exemplary embodiment from which further important features result. It shows:
  • Figure 1 is an end view of a spatial lattice girder with concrete poured into the sheet metal rail.
  • 2 shows the lattice girder according to FIG. 1 in perspective.

Ein Obergurt 1 besteht aus einer tragförmigen Blechschiene mit einem Boden 2 und Seitenwänden 3. An die Außenseiten der Seitenwände 3 sind Diagonalen 4 angeschweißt. Diese sind beim gezeigten Ausführungsbeispiel wellenförmig ausgebildet, wie am besten Fig. 2 erkennen läßt. Im Bereich der unteren Enden der Diagonalen sind Untergurtstäbe 5 an die Diagonalen angeschweißt.An upper chord 1 consists of a support-shaped sheet metal rail with a bottom 2 and side walls 3. Diagonals 4 are welded to the outer sides of the side walls 3. In the exemplary embodiment shown, these are wave-shaped, as can best be seen in FIG. 2. In the area of the lower ends of the diagonals, lower chord rods 5 are welded to the diagonals.

Der Boden 2 und die Seitenwände 3 des Obergurtes haben unter Abständen voneinander angeordnete und in den Innenraum der Blechschiene weisende Noppen 6.The bottom 2 and the side walls 3 of the upper flange have knobs 6 which are arranged at intervals from one another and point into the interior of the sheet metal rail.

Der lichte Abstand 7 zwischen den oberen Kanten 8 der Seitenwände 3 des Obergurtes liegt in der Größenordnung von wenigstens 8 cm.The clear distance 7 between the upper edges 8 of the side walls 3 of the upper chord is of the order of at least 8 cm.

Ein Beton 9 mit Zuschlagstoffen üblicher Korngrößen ist in die Blechschiene eingegeben.A concrete 9 with additives of usual grain sizes is entered into the sheet metal rail.

Zurweiteren Aussteifung kann die Blechschiene an den oberen Kanten der Seitenwände 3 noch Abkantungen 10 haben, im Boden 2 eine in Längsrichtung durchgehende Sicke 11 oder andere übliche Versteifungen in Längs- und/oder Querrichtung.For further stiffening, the sheet metal rail can also have bevels 10 on the upper edges of the side walls 3, in the base 2 a continuous bead 11 in the longitudinal direction or other conventional stiffeners in the longitudinal and / or transverse direction.

Claims (4)

1. Räumlicher Gitterträger mit einem Obergurt, ausgebildet als nach oben offene Blechschiene mit einem Boden und mit Seitenwänden zurAufnahme von Beton, an deren Seitenwänden von außen Diagonalen angeschweißt sind, die den Obergurt mit jeweils einem Untergurtstab verbinden, dadurch gekennzeichnet , daß die Blechschiene über ihre Länge mit unter Abständen angeordneten Vorsprüngen versehen ist und daß der Abstand (7) zwischen den oberen Kanten (8) der Blechschiene so groß ist, daß ein Beton mit Zuschlagstoffen üblicher Korngrößen in die Blechschiene eingegeben werden kann.1. Spatial lattice girder with an upper chord, designed as an upwardly open sheet metal rail with a floor and with side walls for receiving concrete, to the side walls of which diagonals are welded from the outside, which connect the upper chord to a lower chord bar, characterized in that the sheet metal rail is connected via its Length is provided with spaced projections and that the distance (7) between the upper edges (8) of the sheet metal rail is so large that a concrete with additives of conventional grain sizes can be entered into the sheet metal rail. 2. Gitterträger nach Anspruch 1, dadurch gekennzeichnet , daß die Vorsprünge als in den Innenraum der Blechschiene weisende Noppen (6) ausgebildet sind.2. Lattice girder according to claim 1, characterized in that the projections are designed as knobs (6) pointing into the interior of the sheet metal rail. 3. Gitterträger nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß die Seitenwände (3) der Blechschiene zum Innenraum der Blechschiene geneigt sind und ihre Oberkanten (16) nach innen abgewinkelt sind.3. Lattice girder according to claim 1 or 2, characterized in that the side walls (3) of the sheet metal rail are inclined to the interior of the sheet metal rail and their upper edges (16) are angled inwards. 4. Gitterträger nach Anspruch 1 - 3, dadurch gekennzeichnet , daß der Boden (2) der Blechschiene eine in Längsrichtung durchgehende Sicke (11) hat.4. Lattice girder according to claim 1-3, characterized in that the bottom (2) of the sheet metal rail has a continuous bead (11) in the longitudinal direction.
EP79104219A 1979-10-30 1979-10-30 Three-dimensional lattice girder Expired EP0027832B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE7979104219T DE2964741D1 (en) 1979-10-30 1979-10-30 Three-dimensional lattice girder
AT79104219T ATE2453T1 (en) 1979-10-30 1979-10-30 SPATIAL LATTICE BEAM.
EP79104219A EP0027832B1 (en) 1979-10-30 1979-10-30 Three-dimensional lattice girder
NO801928A NO801928L (en) 1979-10-30 1980-06-27 THREE-DIMENSIONAL GRID BAR.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP79104219A EP0027832B1 (en) 1979-10-30 1979-10-30 Three-dimensional lattice girder

Publications (2)

Publication Number Publication Date
EP0027832A1 true EP0027832A1 (en) 1981-05-06
EP0027832B1 EP0027832B1 (en) 1983-02-09

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EP79104219A Expired EP0027832B1 (en) 1979-10-30 1979-10-30 Three-dimensional lattice girder

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EP (1) EP0027832B1 (en)
AT (1) ATE2453T1 (en)
DE (1) DE2964741D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669243A (en) * 1985-11-06 1987-06-02 Truswal Systems Corporation Fire protective system and method for a support structure
CN102216540B (en) * 2008-11-19 2013-10-23 科比亚克斯技术股份公司 Prestressed plate elements

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1900767U (en) * 1960-11-14 1964-09-17 Jacques Werman REAR CONCRETE GIRDER.
CH391245A (en) * 1960-08-27 1965-04-30 Bautechnik Anstalt Carriers, in particular for building purposes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH391245A (en) * 1960-08-27 1965-04-30 Bautechnik Anstalt Carriers, in particular for building purposes
DE1900767U (en) * 1960-11-14 1964-09-17 Jacques Werman REAR CONCRETE GIRDER.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669243A (en) * 1985-11-06 1987-06-02 Truswal Systems Corporation Fire protective system and method for a support structure
CN102216540B (en) * 2008-11-19 2013-10-23 科比亚克斯技术股份公司 Prestressed plate elements

Also Published As

Publication number Publication date
ATE2453T1 (en) 1983-03-15
DE2964741D1 (en) 1983-03-17
EP0027832B1 (en) 1983-02-09

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