EP0028594A1 - Prefabricated reinforced concrete member and floor made of such a member - Google Patents

Prefabricated reinforced concrete member and floor made of such a member Download PDF

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Publication number
EP0028594A1
EP0028594A1 EP80890129A EP80890129A EP0028594A1 EP 0028594 A1 EP0028594 A1 EP 0028594A1 EP 80890129 A EP80890129 A EP 80890129A EP 80890129 A EP80890129 A EP 80890129A EP 0028594 A1 EP0028594 A1 EP 0028594A1
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Prior art keywords
channels
reinforced concrete
longitudinal
reinforcements
prefabricated
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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.)
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Application number
EP80890129A
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German (de)
French (fr)
Inventor
Alexander Dipl.Ing.Dr.Techn Maculan
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Ebenseer Betonwerke GmbH
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Ebenseer Betonwerke GmbH
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Publication of EP0028594A1 publication Critical patent/EP0028594A1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/142—Means in or on the elements for connecting same to handling apparatus
    • E04G21/145—Means in or on the elements for connecting same to handling apparatus specific for hollow plates
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • E04B5/043—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement having elongated hollow cores

Definitions

  • Such a plate-shaped prefabricated part is known from DE-PS 803 427 and that in these previously known ceiling panels the recess is designed as a frontal offset, i.e. in the support area this known prefabricated part of the upper flange is entirely absent. This has various disadvantages.
  • the aim of the invention is to remedy these disadvantages and to design the precast reinforced concrete part in which a high load-bearing capacity can be guaranteed even before the in-situ concrete is applied and in which there is a good bond between the in-situ concrete and the precast reinforced concrete parts.
  • the recesses in the prefabricated reinforced concrete part are designed as individual, longitudinal channels that open at the end faces.
  • the weakening of the top chord of the prefabricated parts by these channels is only minor, but the bond between the reinforcements of the top chord, the in-situ concrete of the ceiling and the prefabricated concrete slabs is greatly improved.
  • the reinforcements of the top chord in the support area find an excellent hold in the channels and the in-situ concrete placed between the precast concrete elements lying opposite each other is advantageously interlocked with these precast elements.
  • the bond effect in the support area is also greatly improved if - according to a further feature of the invention - the precast concrete part has longitudinal cavities, some of which are open at least in some areas upwards, in order to close the channels intended to accommodate the longitudinal reinforcements of the upper flange that can be inserted as required form.
  • transverse or stirrup reinforcements embedded therein can be exposed within the channels and form supports for the longitudinal reinforcements of the upper chord to be inserted, which considerably simplifies the laying of these longitudinal reinforcements.
  • the invention also extends to a ceiling made of precast concrete parts according to the invention.
  • the channels intended for receiving the longitudinal reinforcements of the top chord are aligned on the end faces of the prefabricated parts of adjacent slab fields, and in these channels longitudinal reinforcements are inserted across the supports of these slab fields and in one the recesses and, if necessary the gaps between the end faces of the prefabricated parts or their cavities partially filling in-situ concrete.
  • the usual longitudinal reinforcements 2 are embedded in the area of the underside, that is to say the lower chord, the ends 2 'of which protrude from the end faces of the precast concrete elements 1 into hooks. Furthermore, these precast concrete elements 1 are interspersed with circularly profiled cavities 3, which are provided at regular intervals from each other and run parallel to one another in the longitudinal direction of the precast concrete element 1. On their slightly sloping flanks, these precast concrete parts 1 have deposits 4, from which the transverse reinforcements 5 of the lower chord protrude with upwardly projecting ends 5 '.
  • Cross reinforcements 6, which could also be designed as stirrup reinforcements, are likewise embedded in the upper chord of the prefabricated parts 1. Furthermore, in the area of the top of the prefabricated parts 1, longitudinal recesses 7 opening at the end faces are provided, which extend only over end regions with the partial length 1 ′ over the top of the prefabricated concrete part 1 with the total length 1. In these areas, the cavities 3 of the prefabricated concrete parts 1 which are respectively assigned to the recesses 7 below are partially open at the top in order to form the recesses 7 themselves, which are intended for the insertion of longitudinal reinforcements 8 as required.
  • These longitudinal reinforcements 8 of the top chord of the precast concrete parts 1 then run across the common supports 9 of adjacent ceiling panels, i.e. where the negative supporting moments of the continuous beam occur when the adjacent ceiling panels are monolithically connected to one another.
  • the distance a / 2 between the longitudinal edges of the precast concrete part 1 and the recesses 7 running from these longitudinal edges advantageously corresponds to half the uniform distance a of these recesses 7 from one another, so that the alignment of opposing recesses 7 of adjacent ceiling fields is always ensured, irrespective of whether the laying of the precast concrete parts 1 facing each other is carried out fully on joint or joint on joint.
  • a monolithic structure is formed after the placing of in-situ concrete in the recesses 7 and in the space 10 between the end faces of the prefabricated parts 1, which is to be addressed as a real continuous beam with regard to its static properties and thus a better, more economical use of the therein Reinforcement contained, thus a more economical use of the steel.
  • the usable height of the precast concrete elements 1 can also be reduced as a result of the maximum and minimum bending moments reduced by the continuous effect.

Abstract

The prefabricated reinforced concrete member (1) intended for producing floors possesses, on its top side, i.e. in its top boom, recesses in the form of individual longitudinally extending channels (7) which open out on the front sides and into which can be inserted, in the region of local supports (9), as required, reinforcements (8) serving to absorb moments at support. According to a preferred embodiment, the prefabricated reinforced concrete members (1) have longitudinally extending mutually parallel cavities (3), at least some of which, in certain regions, are open to the top in order to form the channels (7). A further subject of the invention is a floor made of such prefabricated reinforced concrete members (1) having an in-situ concrete which fills the intervening space (10) between adjacent floor bays and also the channels (7) and in which the reinforcements (8) of the top boom of the prefabricated members (1) are embedded, bridging the support (9). <IMAGE>

Description

Die Erfindung betrifft einen Stahlbetonfertigteil für Decken mit einer im Untergurt eingebetteten längsverlaufen= den Bewehrung und mit im Bereich des Obergurtes an Stirn= seiten des Fertigteiles vorgesehenen Ausnehmungen für im Bereich örtlicher Auflager bedarfsweise einfügbare, der Aufnahme von Stützmomenten dienende Längsbewehrungen.The invention relates to a prefabricated reinforced concrete part for ceilings with a longitudinal course embedded in the lower chord = the reinforcement and with recesses provided in the area of the upper chord at the front = sides of the prefabricated part for longitudinal reinforcements that can be inserted in the area of local supports and serve to accommodate supporting moments.

Ein solcher plattenförmiger Fertigteil ist aus der DE-PS 803 427 bekannte und zwar ist bei diesen vorbekannten Deckenplatten die Ausnehmung als stirnseitige Absetzung ausgebildet, d.h.im Auflagerbereich fehlt diesem vorbe= kannten Fertigteil der Obergurt gänzlich. Daraus ergeben sich verschiedenerlei Nachteile.Such a plate-shaped prefabricated part is known from DE-PS 803 427 and that in these previously known ceiling panels the recess is designed as a frontal offset, i.e. in the support area this known prefabricated part of the upper flange is entirely absent. This has various disadvantages.

Zunächst wird durch dieses Fehlen des Obergurtes im Auf= lagerbereich die Tragfähigkeit des Fertigteiles im Zeit= raum bis zum Aufbringen des Ortbetons erheblich vermindert. Weil die Decke aber auch innerhalb dieses Zeitraumes schon erheblichen Beanspruchungen durch die auf ihr stattfinden= .den Bauarbeiten unterliegt, wird sie durch dieses Fehlen des Obergurtes stark gefährdet, insbesondere dann, wenn die Fertigteile vorteilhafterweise zwecks Gewichtersparnis hohl ausgebildet sind.First of all, due to the absence of the top chord in the bearing area, the load-bearing capacity of the prefabricated part is considerably reduced in the period until the in-situ concrete is applied. However, because the ceiling is also subject to considerable stress during this period due to the construction work taking place on it, this absence of the upper flange places it at great risk, especially if the finished parts are advantageously hollow to save weight.

Ferner ist der Verbund zwischen dem Ortbeton der Decke und den von diesem Ortbeton überdeckten Enden der Fertigteile schlecht, weil die Absetzungen der Stirnseiten an ihren Oberseiten glatte, ebene Flächen aufweisen.Furthermore, the bond between the in-situ concrete of the ceiling and the ends of the prefabricated parts covered by this in-situ concrete is poor, because the offset portions of the end faces have smooth, flat surfaces on their upper sides.

Ziel der Erfindung ist die Behebung dieser Nachteile und eine Ausbildung des Stahlbetonfertigteiles, bei der schon vor dem Aufbringen des Ortbetons eine hohe Tragfähigkeit gewährleistbar ist und bei der sich eine gute Verbundwirkung zwischen dem Ortbeton und den Stahlbetonfertigteilen ergibt. Erfindungsgemäß sind die Ausnehmungen des Stahlbetonfertig= teiles als einzelne, längsverlaufende, an den Stirnseiten mündende Kanäle ausgebildet.The aim of the invention is to remedy these disadvantages and to design the precast reinforced concrete part in which a high load-bearing capacity can be guaranteed even before the in-situ concrete is applied and in which there is a good bond between the in-situ concrete and the precast reinforced concrete parts. According to the invention, the recesses in the prefabricated reinforced concrete part are designed as individual, longitudinal channels that open at the end faces.

Die Schwächung des Obergurtes der Fertigteile durch diese Kanäle ist bloß geringfügig, sehr verbessert wird aber die Verbundwirkung zwischen den Bewehrungen des Obergurtes, dem sie einbettenden Ortbeton der Decke und den platten= förmigen Betonfertigteilen. Die Bewehrungen des Obergurtes im Auflagerbereich finden in den Kanälen einen ausgezeich= neten Halt und der zwischen den stirnseitig einander gegen= überliegenden Betonfertigteilen eingebrachte Ortbeton wird mit diesen Fertigteilen vorteilhaft verzahnt.The weakening of the top chord of the prefabricated parts by these channels is only minor, but the bond between the reinforcements of the top chord, the in-situ concrete of the ceiling and the prefabricated concrete slabs is greatly improved. The reinforcements of the top chord in the support area find an excellent hold in the channels and the in-situ concrete placed between the precast concrete elements lying opposite each other is advantageously interlocked with these precast elements.

Sehr verbessert wird die Verbundwirkung im Auflagerbereich zusätzlich noch dann, wenn - nach einem weiteren Erfindungs= merkmal - der Betonfertigteil längsverlaufende Hohlräume aufweist, von denen einzelne zumindest bereichsweise nach oben hin offen sind, um die zur Aufnahme der bedarfsweise einfügbaren Längsbewehrungen des Obergurtes bestimmten Kanäle zu bilden.The bond effect in the support area is also greatly improved if - according to a further feature of the invention - the precast concrete part has longitudinal cavities, some of which are open at least in some areas upwards, in order to close the channels intended to accommodate the longitudinal reinforcements of the upper flange that can be inserted as required form.

Zweckdienlicherweise können darin eingebettete Quer- oder Bügelbewehrungen innerhalb der Kanäle freiliegen und Auflager für die einzufügenden Längsbewehrungen des Obergurtes bilden, wodurch die Verlegung dieser Längsbewehrungen erheblich vereinfacht wird.Expediently, transverse or stirrup reinforcements embedded therein can be exposed within the channels and form supports for the longitudinal reinforcements of the upper chord to be inserted, which considerably simplifies the laying of these longitudinal reinforcements.

Die Erfindung erstreckt sich des weiteren.auf eine Decke aus erfindungsgemäßen Betonfertigteilen. Bei einer solchen Decke fluchten die zur Aufnahme der Längsbewehrungen des Ober= gurtes bestimmten Kanäle stirnseitig einander gegenüberlie= gender Fertigteile einander benachbarter Deckenfelder und in diese Kanäle sind quer über die Auflager dieser Decken= felder hinweg verlaufende Längsbewehrungen eingefügt und in einem die Ausnehmungen, sowie gegebenenfalls die Zwischen= räume zwischen den Stirnseiten der Fertigteile bzw. deren Hohlräume teilweise füllenden Ortbeton eingebettet.The invention also extends to a ceiling made of precast concrete parts according to the invention. In such a slab, the channels intended for receiving the longitudinal reinforcements of the top chord are aligned on the end faces of the prefabricated parts of adjacent slab fields, and in these channels longitudinal reinforcements are inserted across the supports of these slab fields and in one the recesses and, if necessary the gaps between the end faces of the prefabricated parts or their cavities partially filling in-situ concrete.

Nachstehend wird die Erfindung anhand eines Ausführungsbei= spieles, das in den Zeichnungen dargestellt ist, erläutert.

  • Figur 1 zeigt schaubildlich das Stirnende eines einzelnen plattenförmigen Betonfertigteiles und
  • Figur 2 zeigt in einem Längsschnitt nach II-II der Figur 1 die einander gegenüberliegenden Stirnenden der Betonfertig= teile zweier einander benachbarter Deckenfelder oberhalb eines Auflagers.
The invention is explained below using an exemplary embodiment which is illustrated in the drawings.
  • Figure 1 shows the front end of a single plate-shaped precast concrete and
  • Figure 2 shows in a longitudinal section according to II-II of Figure 1, the opposite ends of the prefabricated concrete = parts of two adjacent ceiling panels above a support.

In den einzelnen Betonfertigteilen 1 sind im Bereich der Unterseite, also des Untergurtes, die üblichen Längsbeweh= rungen 2 eingebettet, deren Enden 2' an den Stirnseiten der Betonfertigteile l zu Haken verformt ausragen. Ferner sind diese Betonfertigteile 1 von kreisförmig profilierten Hohl= räumen 3 durchsetzt, die in regelmäßigen Abständen von= einander parallel zueinander verlaufend in Längsrichtung des Betonfertigteiles 1 vorgesehen sind. An ihren geringfügig schräg verlaufenden Flanken besitzen diese Betonfertigteile 1 Absetzungen 4, aus denen die Querbewehrungen 5 des Unter= gurtes mit aufwärtsragenden Enden 5' ausragen.In the individual precast concrete parts 1, the usual longitudinal reinforcements 2 are embedded in the area of the underside, that is to say the lower chord, the ends 2 'of which protrude from the end faces of the precast concrete elements 1 into hooks. Furthermore, these precast concrete elements 1 are interspersed with circularly profiled cavities 3, which are provided at regular intervals from each other and run parallel to one another in the longitudinal direction of the precast concrete element 1. On their slightly sloping flanks, these precast concrete parts 1 have deposits 4, from which the transverse reinforcements 5 of the lower chord protrude with upwardly projecting ends 5 '.

Im Obergurt der Fertigteile 1 sind ebenfalls Querbewehrungen 6 eingebettet, die auch als Bügelbewehrungen ausgebildet sein könnten. Ferner sind im Bereich der Oberseite der Fertig= teile 1 längsverlaufende, an den Stirnseiten mündende Aus= nehmungen 7 vorgesehen, die sich nur über Endbereiche mit der Teillänge l' über die Oberseite des Betonfertigteiles 1 mit der Gesamtlänge 1 erstrecken. In diesen Bereichen sind die den Ausnehmungen 7 unterhalb jeweils zugeordneten Hohlräume 3 der Betonfertigteile 1 bereichsweise nach oben offen, um solcherart die zur Aufnahme bedarfsweise einfügbarer Längs= bewehrungen 8 bestimmten Ausnehmungen.7 selbst zu bilden.Cross reinforcements 6, which could also be designed as stirrup reinforcements, are likewise embedded in the upper chord of the prefabricated parts 1. Furthermore, in the area of the top of the prefabricated parts 1, longitudinal recesses 7 opening at the end faces are provided, which extend only over end regions with the partial length 1 ′ over the top of the prefabricated concrete part 1 with the total length 1. In these areas, the cavities 3 of the prefabricated concrete parts 1 which are respectively assigned to the recesses 7 below are partially open at the top in order to form the recesses 7 themselves, which are intended for the insertion of longitudinal reinforcements 8 as required.

Diese Längsbewehrungen 8 des Obergurtes der Betonfertigteile 1 verlaufen dann quer über die gemeinsamen Auflager 9 be= nachbarter Deckenfelder, also dort, wo die negativen Stütz= momente des Durchlaufträgers auftreten, wenn die benach= barten Deckenfelder monolithisch miteinander verbunden sind. Der Abstand a/2 der den Längsrändern des Betonfertigteiles 1 jeweils benachbart verlaufenden Ausnehmungen 7 von diesen Längsrändern enspricht vorteilhafterweise der Hälfte des einheitlichen Abstandes a dieser Ausnehmungen 7 voneinander, so daß stets das Fluchten einander gegenüberliegender Aus= nehmungen 7 benachbarter Deckenfelder sichergestellt ist, gleichgültig ob die Verlegung der stirnseitig einander gegenüberliegenden Betonfertigteile 1 Voll auf Fug oder Fug auf Fug erfolgt.These longitudinal reinforcements 8 of the top chord of the precast concrete parts 1 then run across the common supports 9 of adjacent ceiling panels, i.e. where the negative supporting moments of the continuous beam occur when the adjacent ceiling panels are monolithically connected to one another. The distance a / 2 between the longitudinal edges of the precast concrete part 1 and the recesses 7 running from these longitudinal edges advantageously corresponds to half the uniform distance a of these recesses 7 from one another, so that the alignment of opposing recesses 7 of adjacent ceiling fields is always ensured, irrespective of whether the laying of the precast concrete parts 1 facing each other is carried out fully on joint or joint on joint.

Mittels der zusätzlich eingefügten Längsbewehrungen 8 wird nach Einbringung von Ortbeton in die Ausnehmungen 7 und in den Zwischenraum 10 zwischen den Stirnseiten der Fertigteile 1 ein monolithisches Tragwerk gebildet, das hinsichtlich seiner statischen Eigenschaften als echter Durchlaufträger anzusprechen ist und somit eine bessere, wirtschaftlichere Nutzung der darin enthaltenen Bewehrung, somit eine spar= samere Verwendung des Stahles, ermöglicht.'Davon abgesehen kann auch die nutzbare Höhe der Betonfertigteile 1 infolge der durch die Durchlaufwirkung verringerten Maximal- und Minimal-Biegungsmomente verringert werden.By means of the additionally inserted longitudinal reinforcements 8, a monolithic structure is formed after the placing of in-situ concrete in the recesses 7 and in the space 10 between the end faces of the prefabricated parts 1, which is to be addressed as a real continuous beam with regard to its static properties and thus a better, more economical use of the therein Reinforcement contained, thus a more economical use of the steel. Apart from that, the usable height of the precast concrete elements 1 can also be reduced as a result of the maximum and minimum bending moments reduced by the continuous effect.

Claims (5)

1. Stahlbetonfertigteil für Decken mit einer im Untergurt eingebetteten längsverlaufenden Bewehrung (2) und mit im Bereich des Obergurtes an Stirnseiten des Fertig= teiles (1) vorgesehenen Ausnehmungen für im Bereich örtlicher Auflager (9) bedarfsweise einfügbare, der Aufnahme von Stützmomenten dienende Längsbewehrungen (8), dadurch gekennzeichnet, daß diese Ausnehmungen als ein= zelne, längsverlaufende, an den Stirnseiten mündende Kanäle (7) ausgebildet sind.1.Fabricated reinforced concrete part for ceilings with a longitudinal reinforcement (2) embedded in the lower flange and with recesses provided in the area of the upper flange on the end faces of the prefabricated part (1) for longitudinal reinforcements which can be inserted in the area of local supports (9) and serve to absorb supporting moments ( 8), characterized in that these recesses are formed as a single, longitudinally running channels (7) opening at the end faces. 2. Stahlbetonfertigteil nach Anspruch 1, dadurch gekenn= zeichnet, daß er längsverlaufende Hohlräume (3) auf= weist, von denen einzelne zumindest bereichsweise nach oben hin offen sind, um die zur Aufnahme der bedarfs= weise einfügbaren Längsbewehrungen (8) des Obergurtes bestimmten Kanäle (7) zu bilden.2. Precast reinforced concrete element according to claim 1, characterized in that it has longitudinal cavities (3) on =, some of which are at least partially open at the top to determine which longitudinal reinforcements (8) of the upper chord can be inserted as required Form channels (7). 3. Stahlbetonfertigteil.nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß darin eingebettete.Quer- oder Bügelbewehrungen (6) innerhalb der Kanäle (7) freiliegen und Auflager für die einzufügenden Längsbewehrungen (8) des Obergurtes bilden.3. precast reinforced concrete part according to claim 1 or 2, characterized in that embedded therein. Cross or stirrup reinforcements (6) are exposed within the channels (7) and form supports for the longitudinal reinforcements (8) of the upper chord to be inserted. 4. Stahlbetonfertigteil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Abstand der den Längs= rändern des Fertigteiles (1) benachbart verlaufenden Kanäle (7) von diesen Längsrändern der Hälfte (a/2) des einheitlichen Abstandes (a) dieser Kanäle (7) von= einander entspricht. j4. Precast reinforced concrete element according to one of claims 1 to 3, characterized in that the distance between the longitudinal = edges of the prefabricated part (1) adjacent channels (7) from these longitudinal edges of half (a / 2) of the uniform distance (a) this Channels (7) of = correspond to each other. j 5. Decke aus Stahlbetonfertigteilen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die zur Aufnahme der Längsbewehrungen ,(8) des Obergurtes bestimmten Kanäle (7) stirnseitig einander gegenüberliegender Fertigteile (1) einander benachbarter Deckenfelder fluchten und daß in diese Kanäle (7) quer über die Auflager (9) dieser Deckenfelder hinweg verlaufende Längsbewehrungen (8) eingefügt und in einem die Ausnehmungen (7), sowie gegebenenfalls die Zwischenräume (10) zwischen den Stirnseiten der Fertigteile (1) bzw. deren Hohlräume (3) teilweise füllenden Ortbeton eingebettet sind.5. Ceiling made of reinforced concrete parts according to one of claims 1 to 4, characterized in that the channels for receiving the longitudinal reinforcements (8) of the upper chord (7) face-to-face finished parts (1) are aligned with adjacent ceiling panels and that in these channels ( 7) across the support (9) this Longitudinal reinforcements (8) extending across the slab fields and embedded in one of the recesses (7) and, if applicable, the gaps (10) between the end faces of the prefabricated parts (1) or their cavities (3) partially filling in-situ concrete.
EP80890129A 1979-10-30 1980-10-30 Prefabricated reinforced concrete member and floor made of such a member Withdrawn EP0028594A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT702179A AT373659B (en) 1979-10-30 1979-10-30 STEEL CONCRETE PANEL FOR CEILINGS
AT7021/79 1979-10-30

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EP0028594A1 true EP0028594A1 (en) 1981-05-13

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AT (1) AT373659B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516139A1 (en) * 1991-05-28 1992-12-02 Jose Manuel Restrepo Slotted floor slab for the two-stage construction of level concrete plates
US6845591B1 (en) 1999-09-24 2005-01-25 Vbi Ontwikkeling B.V. Hollow-core slab for forming a floor field in which ducts can be incorporated, and method for forming a floor field with ducts using such hollow-core slabs
FR2894266A1 (en) * 2005-12-07 2007-06-08 E Ronveaux Sa Sa Belge Ets Concrete slab gripping device for e.g. building site, has metallic bar crossing internal walls and external walls of void, and gripping hook inserted under metallic bars through openings of upper wall of void
EP2657423A1 (en) * 2012-04-25 2013-10-30 Vbi Ontwikkeling B.V. A concrete slab and a method of manufacturing a concrete slab, a building, and a method of mounting a concrete slab on a building structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE803427C (en) * 1951-02-01 Bimsbetonwerk Volklmgen G.mb.H., Weißenthurm (Kr. Koblenz) Reinforced concrete slab
DE1459890A1 (en) * 1963-02-20 1968-12-19 Bimsbetonwerk Voelklingen Gmbh Reinforced concrete slab
DE2104786A1 (en) * 1970-02-04 1971-11-18 Rodriguez de la Cruzz, Josefjntonio, Madrid Prefabricated reinforced concrete building panel, in particular for building walls
DE2422192A1 (en) * 1974-05-08 1975-11-13 Otto Hofmann Prefabricated structural storey concrete ceiling element - with casting - in openings to hollows between support slabs ribs ends in under-slab

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE803427C (en) * 1951-02-01 Bimsbetonwerk Volklmgen G.mb.H., Weißenthurm (Kr. Koblenz) Reinforced concrete slab
DE1459890A1 (en) * 1963-02-20 1968-12-19 Bimsbetonwerk Voelklingen Gmbh Reinforced concrete slab
DE2104786A1 (en) * 1970-02-04 1971-11-18 Rodriguez de la Cruzz, Josefjntonio, Madrid Prefabricated reinforced concrete building panel, in particular for building walls
DE2422192A1 (en) * 1974-05-08 1975-11-13 Otto Hofmann Prefabricated structural storey concrete ceiling element - with casting - in openings to hollows between support slabs ribs ends in under-slab

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516139A1 (en) * 1991-05-28 1992-12-02 Jose Manuel Restrepo Slotted floor slab for the two-stage construction of level concrete plates
AU655820B2 (en) * 1991-05-28 1995-01-12 Jose Manuel Restrepo Slotted floor slab for the two-stage construction of level concrete plates
US6845591B1 (en) 1999-09-24 2005-01-25 Vbi Ontwikkeling B.V. Hollow-core slab for forming a floor field in which ducts can be incorporated, and method for forming a floor field with ducts using such hollow-core slabs
EP1214483B1 (en) * 1999-09-24 2005-10-12 Vbi Ontwikkeling B.V. Hollow-core slab for forming a floor field in which ducts can be incorporated, and method for forming a floor field with ducts using such hollow-core slabs
FR2894266A1 (en) * 2005-12-07 2007-06-08 E Ronveaux Sa Sa Belge Ets Concrete slab gripping device for e.g. building site, has metallic bar crossing internal walls and external walls of void, and gripping hook inserted under metallic bars through openings of upper wall of void
EP2657423A1 (en) * 2012-04-25 2013-10-30 Vbi Ontwikkeling B.V. A concrete slab and a method of manufacturing a concrete slab, a building, and a method of mounting a concrete slab on a building structure

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AT373659B (en) 1984-02-10
ATA702179A (en) 1983-06-15

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