EP2357293B1 - Filling member for floor structures with beams - Google Patents

Filling member for floor structures with beams Download PDF

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Publication number
EP2357293B1
EP2357293B1 EP11290081A EP11290081A EP2357293B1 EP 2357293 B1 EP2357293 B1 EP 2357293B1 EP 11290081 A EP11290081 A EP 11290081A EP 11290081 A EP11290081 A EP 11290081A EP 2357293 B1 EP2357293 B1 EP 2357293B1
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EP
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Prior art keywords
filling member
interjoists
member according
beams
previous
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EP11290081A
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German (de)
French (fr)
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EP2357293A1 (en
Inventor
Jean-Noël Defer
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Rector Lesage SAS
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Rector Lesage SAS
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Priority to PL11290081T priority Critical patent/PL2357293T3/en
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    • 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
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • E04B5/261—Monolithic filling members

Definitions

  • the present invention relates to intervous for floor with beams, having a substantially rectangular periphery defining two longitudinal edges and two lateral edges, the longitudinal edges being intended to bear on the heel of the floor beams and the side edges being intended to cooperate at least with the side edges of interjoists placed end to end to form a row extending over a span of the floor defined between two adjacent beams, said interjoists consisting of a profiled half-shell forming a body.
  • the manufacture of joists of all types, including prestressed concrete joists, is widely used in the building industry.
  • the beams extend parallel between beams or load-bearing walls according to a predefined distance.
  • the gap between two beams is filled by intermediate elements commonly called interjoists or slabs to form a lost formwork adapted to receive the metal frame and poured concrete forming the compression table of the floor.
  • each type of interjoists has advantages such as for example lightness, mechanical strength, and disadvantages such as for example weight, fragility, aesthetics.
  • Some examples of thin and light interjoists are described in the publications FR 2 786 514 , EN 2,858,343 and FR 2919317 .
  • the publications FR 1428 749 and DE 1 902 154 illustrate curved or arched interjoists to increase their mechanical resistance.
  • the ideal interjoists sought must be light to be easily handled even in large dimensions, mechanically resistant to support the weight of the workers during the realization of the floor and concrete poured from the floor itself and the exchange supported by this floor, fire resistant and weather, aesthetics under the face, and have all the technical features necessary for an easy and reliable implementation of the floor.
  • shutters for closing the spans to pour the screed
  • the present invention aims at further improving the solution proposed above including reducing the volume of material necessary to achieve said interjoists, having the effect of reducing the weight and cost of the interjoists molded, without impairing its technical performance, and by adding to it a shutter at one of its extremities so that it is sufficient for itself.
  • the invention relates to interjoists of the kind indicated in the preamble, characterized in that one end of the interjoists corresponding to one of the side edges is closed by an integrated shutter and formed in one piece with the body. It advantageously extends over a height greater than that of the body of the interjoists, and comprises a base located under the longitudinal edges, intended to bear on a load-bearing member of the floor.
  • the body preferably has a vault-shaped arched section defined substantially by an ellipse and has a thickness substantially constant in its length and in its width, the ratio of the thickness of the half-shell to the length of the interjoists being advantageously be substantially between 0.35 / 100 and 0.5 / 100. In this case, for a thickness of the order of 5 to 6 mm and a length of the order of 1.30 m, the weight of said interjoists will not exceed 5.5 kg.
  • interjoists are made by molding a fiber-based mixture and / or wood chips agglomerated with a binder curable by hot polymerization.
  • Said shutter may have a substantially rounded shape and slope flared towards its base and be connected to the body by an assembly area framed by a first and a second recess.
  • the other end of the interjoists corresponding to the lateral edge is preferably open and forms an assembly zone connected to the body by a recess, this assembly area may cover said shutter of a previous interjoists.
  • said interjoists have transverse grooves extending between the longitudinal edges.
  • the longitudinal edges located at the ends of the transverse grooves are advantageously reinforced and comprise a substantially vertical abutment intended to bear on the side of the heel of the beams having the effect of locking the lateral position of the interjoists between two adjacent beams.
  • the interjoists comprises raised studs distributed on the middle part of the body, intended to wedge height of the metal mesh of the floor by raising it relative to said body.
  • the interjoists according to the invention is obtained according to a manufacturing process in which fibers and / or wood chips, for example resinous wood from sawmill waste, agglomerated by a binder curable by hot polymerization, are mixed.
  • This binder contains, for example, a component of the isocyanate family polymerizable at 100 ° C and enters the material in a proportion of less than 10% and for example between 3 and 5%.
  • other types of binder may also be suitable.
  • other methods may be suitable to obtain the curing of the binder.
  • This mixture is then shaped in a mold under a pressure of about 1000 tons / m 2 at a temperature of at least 100 ° C to obtain the curing of the binder in the interjoists.
  • This material as such exists and is commonly marketed under the trademark Novopan®. It is for example used in the manufacture of furniture, cable drums, transport pallets, and for the first time in the building as interstices according to the publication FR 2,858,641 from the same applicant.
  • this material makes it possible to realize interjoists of very high quality unlike those made of wood fibers agglomerated by cement, which are coarse heavy and brittle, as in the publication FR-A-2,756,305 .
  • This material being very rigid, it allows to realize a interjoists having high mechanical strength for a small thickness and reduced weight.
  • interjoists according to the invention are different from those defined in the publication.
  • FR 2,859,641 its ratio of thickness to the length of the interjoists which is significantly lower and substantially between 0.35 / 100 and 0.5 / 100.
  • its thickness is of the order of 5 to 6 mm and its length of the order of 1.30 m.
  • its weight does not exceed 5.5 kg, which is very significant for the handling and represents a saving of about 20 to 30% of the weight of the interlude of the publication FR 2,858,641 .
  • this low weight makes it possible to further optimize the performance of the finished floor.
  • This manufacturing process has the advantage of giving the intermediate element a smooth appearance making it particularly aesthetic and allowing it to remain visible under the face of the floor if necessary.
  • the interjoists 1 has a substantially rectangular periphery defining two parallel longitudinal edges 2 intended to bear on the heel of the beams (not shown) of a floor, and two parallel side edges 3 intended to cooperate with the lateral edges of interlocks 1 adjacent to or near the edge of a wall or load-bearing beam.
  • the interjoists 1 consists of a profiled half-shell defining a body 10, of substantially constant thickness in its length and in its width, with the exception of certain strategic locations detailed below.
  • This interjoists 1 has a vaulted section vaulted substantially defined by an ellipse, which has several advantages.
  • the first advantage lies in its increased mechanical performance as it can withstand higher loads for a lower material thickness compared to the trapezoidal section interjoists of the publication.
  • the second advantage lies in its ease of manufacture since the negative elliptical shape given to the mold makes it possible to deposit a layer of material of very low thickness, which is not possible with a section formed of straight segments with strong inclinations .
  • the arcuate curved section intrinsically gives the interjoists a so-called undercut shape allowing both easy demolding and perfect stacking interjoists 1 of the same shape, in order to reduce clutter and cost of storage and transport of these interjoists 1. Similar sections offering the same performance may also be suitable.
  • the longitudinal edges 2 of the interjoists 1 comprise a longitudinal shoulder extending over almost the entire length of the interjoists 1 and defining a substantially horizontal support 20 (cf. Fig. 5 ) intended to rest on the heel of the beams and make up any play between the beams.
  • this longitudinal shoulder is widened and also defines a substantially vertical stop 21 intended to bear on the flank of the heel of the beams having the effect of locking the lateral position of the interjoists 1 between two adjacent beams (cf. Fig. 4 ).
  • One end of the interjoists 1 corresponding to the lateral edge 3 is closed by an integrated shutter 30 and constituted in one piece with the body 10.
  • This shutter 30 has no longitudinal shoulder and extends over a higher height. to that of the rest of the interjoists 1, so that its base 31 is at a level below the longitudinal edges 2 of about the thickness of the heel of the beams, so that the base 31 can rest on a carrier element of a construction such as a wall or a beam. Thanks to this construction, the interjoists 1 located at the end of a span makes it possible to close off the gap existing between the interjoists 1, the carrier element on which it rests and the adjacent joists bearing on this carrier element. .
  • the interjoin 1 according to the invention is self-sufficient and does not require an insert, as a separate shutter according to the publication FR 2,858,641 .
  • the shutter 30 has a substantially rounded shape and sloping towards its base 31. It is connected to the body 10 by an assembly zone 32 framed by a first and a second recess 33 and 34, the function of which is explained below. after.
  • the other end 4 of the interjoists 1 is open, has no longitudinal shoulder, and forms an assembly zone 40 connected to the body 10 by a recess 41.
  • figure 5 shows the section of the assembly zone 40 of the interjoists 1 (according to the section DD) superimposed on the section of the body 10 of the interjoists 1 (according to the section CC) illustrating the possible interlocking of the one in the 'other.
  • two solutions are conceivable. When interjoists 1 are used as such with their shutter 30, the assembly area 40 of a interjoists 1 can be supported on the first recess 33 defined at the top of the shutter 30 of the interjoin 1 above.
  • the assembly area 40 of a interjoists 1 can be covered by the body 10 of the interjoists 1 previous forming a complementary assembly area.
  • This type of overlap assembly allows a relative longitudinal movement of the interjoists 1 relative to each other to adjust the total length of a row of interjoists 1 placed end to end to the length of the beams or the span, facilitating and reducing interjoists cuts 1.
  • the interjoists 1 comprises a plurality of transverse grooves 5 spaced regularly, but not necessarily, and extending from one longitudinal edge 2 to the other. They have a section in the longitudinal direction V flared to meet the manufacturing constraints (low material thickness and undercut) and may have an equal depth or not.
  • the interjoists 1 comprises five transverse grooves 5, three of which have a depth greater than the other two.
  • These transverse grooves 5 have several functions. The first function is to stiffen the interjoists 1 by increasing its mechanical resistance to bending. The second function is to facilitate the flow of rainwater to avoid that they affect the quality of the concrete that will be poured on interjoists 1.
  • the third function is to increase the thickness of the cast concrete, and therefore its mass and its inertia, in the transverse grooves 5.
  • the fourth function is to facilitate the fixing on the underside of pipes, ducts, false ceilings, etc. Indeed, the thickness of the wall of the interjoists 1 groove bottom 5 is larger and offers a high resistance to tearing forming ideal anchoring points for all types of fasteners such as screws , studs, staples, etc. Pilot holes (not shown) can be provided directly during the molding of the interjoists 1 to facilitate screwing.
  • the longitudinal edges 2 located at the ends of these grooves transverse, 5 are reinforced and include in accordance with the figure 4 at the level of the longitudinal shoulder the substantially vertical stop 21 (cf. Fig. 4 ).
  • the interjoists 1 also comprises studs 6 in relief distributed over the median part of the body 10, designed to wedge up the wire mesh of the floor by raising it relative to the body 10 of the interjoists 1 to obtain a better coating of the concrete around the wire mesh when pouring the compression slab.
  • These pads 6 have for example an elongate shape, oriented transversely, defining a substantially horizontal bearing zone, or may have any other suitable shape.
  • These pads 6 are arranged, in the example shown, between the transverse grooves 5, staggered on either side of the longitudinal median axis of the interjoists 1. Any other provision is possible.
  • these pads 6 have a thickness at the top of 6 to 8 mm for a concrete thickness at the top of the interjoists 1 of 4 cm. This thickness is variable depending on the specifications of the floor.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Description

Domaine technique :Technical area :

La présente invention concerne un entrevous pour plancher à poutrelles, comportant un pourtour Sensiblement rectangulaire définissant deux bords longitudinaux et deux bords latéraux, les bords longitudinaux étant destinés à prendre appui sur le talon des poutrelles du plancher et les bords latéraux étant destinés à coopérer au moins avec les bords latéraux d'entrevous mis bout à bout pour former une rangée s'étendant sur une travée du plancher définie entre deux poutrelles adjacentes, ledit entrevous étant constitué d'une demi-coque profilée formant un corps.The present invention relates to intervous for floor with beams, having a substantially rectangular periphery defining two longitudinal edges and two lateral edges, the longitudinal edges being intended to bear on the heel of the floor beams and the side edges being intended to cooperate at least with the side edges of interjoists placed end to end to form a row extending over a span of the floor defined between two adjacent beams, said interjoists consisting of a profiled half-shell forming a body.

Technique antérieure :Prior art:

La fabrication de planchers à poutrelles de tout type, et notamment de poutrelles en béton précontraint, est largement répandue dans le domaine du bâtiment. Les poutrelles s'étendent parallèlement entre des poutres ou des murs porteurs selon un entraxe prédéfini. L'intervalle entre deux poutrelles est comblé par des élément intercalaires appelés communément des entrevous ou des hourdis pour former un coffrage perdu apte à recevoir l'armature métallique et le béton coulé formant la table de compression du plancher.The manufacture of joists of all types, including prestressed concrete joists, is widely used in the building industry. The beams extend parallel between beams or load-bearing walls according to a predefined distance. The gap between two beams is filled by intermediate elements commonly called interjoists or slabs to form a lost formwork adapted to receive the metal frame and poured concrete forming the compression table of the floor.

Il existe à ce jour plusieurs types d'entrevous ayant des caractéristiques techniques différentes selon leur géométrie et les matériaux dans lesquels ils sont fabriqués tels que béton, céramique, polystyrène, fibres de bois agglomérées par du ciment ( FR-A-2 756 305 ), matières plastiques, etc. Par conséquent, chaque type d'entrevous présente des avantages tels que par exemple légèreté, résistance mécanique, et des inconvénients tels que par exemple poids, fragilité, esthétique. Quelques exemples d'entrevous minces et léger sont décrits dans les publications FR 2 786 514 , FR 2 858 343 et FR 2919317 . Les publications FR 1428 749 et DE 1 902 154 illustrent des entrevous cintrés ou voûtés pour augmenter leur résistance mécanique.To date, there are several types of interjoists with different technical characteristics according to their geometry and the materials in which they are manufactured such as concrete, ceramics, polystyrene, wood fibers agglomerated with cement ( FR-A-2,756,305 ), plastics, etc. Therefore, each type of interjoists has advantages such as for example lightness, mechanical strength, and disadvantages such as for example weight, fragility, aesthetics. Some examples of thin and light interjoists are described in the publications FR 2 786 514 , EN 2,858,343 and FR 2919317 . The publications FR 1428 749 and DE 1 902 154 illustrate curved or arched interjoists to increase their mechanical resistance.

L'entrevous idéal recherché doit être léger pour être facilement manutentionnable même dans des dimensions importantes, résistant mécaniquement pour supporter le poids des ouvriers pendant la réalisation du plancher puis le béton coulé du plancher proprement dit et la change supportée par ce plancher, résistant au feu et aux intempéries, esthétique en sous face, et présenter toutes les caractéristiques techniques nécessaires à une mise en oeuvre facile et fiable du plancher.The ideal interjoists sought must be light to be easily handled even in large dimensions, mechanically resistant to support the weight of the workers during the realization of the floor and concrete poured from the floor itself and the exchange supported by this floor, fire resistant and weather, aesthetics under the face, and have all the technical features necessary for an easy and reliable implementation of the floor.

Cet entrevous idéal a été développé par le demandeur et a fait l'objet de la publication FR 2 858 641 . Il est réalisé par un procédé de moulage sous pression à partir d'un mélange de particules de matières ligneuses, telles que des copeaux de bois résineux, à au moins un liant synthétique durcissable à chaud, tel que faisant partie de la famille des isocyanates.This ideal interview was developed by the applicant and was published FR 2,858,641 . It is carried out by a pressure molding process from a mixture of woody material particles, such as resinous wood chips, with at least one synthetic heat-curable binder, as part of the family of isocyanates.

Tous ces entrevous doivent être complétés par des pièces d'about appelées des obturateurs permettant dé fermer les travées en vue de couler la chape, Ces obturateurs doivent donc être fabriqués séparément, dans des moules spécifiques, impliquant des coûts à la, fois de production mais aussi de stockage, de gestion de stock et de transport.All these interjoists must be completed by end pieces called shutters for closing the spans to pour the screed, These shutters must be manufactured separately, in specific molds, involving costs at the time of production but also storage, stock management and transportation.

Exposé de l'invention:Presentation of the invention

La présente invention vise à améliorer encore la solution proposée ci-dessus notamment en réduisant le volume de matière nécessaire pour réaliser ledit entrevous, ayant pour effet de réduire le poids et le coût de cet entrevous moulé, sans toutefois porter atteinte à ses performances techniques, et en lui adjoignant un obturateur à l'une de ses extrémités pour qu'il se suffise à lui-même.The present invention aims at further improving the solution proposed above including reducing the volume of material necessary to achieve said interjoists, having the effect of reducing the weight and cost of the interjoists molded, without impairing its technical performance, and by adding to it a shutter at one of its extremities so that it is sufficient for itself.

Dans ce but, l'invention concerne un entrevous du genre indiqué en préambule, caractérisé en ce qu'une des extrémités de l'entrevous correspondant à un des bords latéraux est fermée par un :obturateur intégré et constitué d'une seule pièce avec le corps. Il s'étend avantageusement sur une hauteur supérieure à celle du corps de l'entrevous, et comporte une base située sous les bords longitudinaux, destinée à prendre appui sur un élément porteur du plancher.For this purpose, the invention relates to interjoists of the kind indicated in the preamble, characterized in that one end of the interjoists corresponding to one of the side edges is closed by an integrated shutter and formed in one piece with the body. It advantageously extends over a height greater than that of the body of the interjoists, and comprises a base located under the longitudinal edges, intended to bear on a load-bearing member of the floor.

Le corps a de préférence une section cintrée en forme de voûte définie sensiblement par une ellipse et a une épaisseur sensiblement constante dans sa longueur et dans sa largeur, le rapport de l'épaisseur de la demi-coque sur la longueur de l'entrevous pouvant être avantageusement compris sensiblement entre 0,35/100 et 0,5/100. Dans ce cas, pour une épaisseur de l'ordre de 5 à 6 mm et une longueur de l'ordre de 1,30 m, le poids dudit entrevous n'excèdera pas 5,5 kg.The body preferably has a vault-shaped arched section defined substantially by an ellipse and has a thickness substantially constant in its length and in its width, the ratio of the thickness of the half-shell to the length of the interjoists being advantageously be substantially between 0.35 / 100 and 0.5 / 100. In this case, for a thickness of the order of 5 to 6 mm and a length of the order of 1.30 m, the weight of said interjoists will not exceed 5.5 kg.

Ces caractéristiques sont obtenues dans le cas où ledit entrevous est réalisé par moulage d'un mélange à base de fibres et/ou des copeaux de bois agglomérés par un liant durcissable par polymérisation à chaud.These characteristics are obtained in the case where said interjoists are made by molding a fiber-based mixture and / or wood chips agglomerated with a binder curable by hot polymerization.

Ledit obturateur peut avoir une forme sensiblement arrondie et en pente évasée vers sa base et être relié au corps par une zone d'assemblage encadrée par un premier et un second décrochement.Said shutter may have a substantially rounded shape and slope flared towards its base and be connected to the body by an assembly area framed by a first and a second recess.

L'autre extrémité de l'entrevous correspondant au bord latéral est de préférence ouverte et forme une zone d'assemblage reliée au corps par un décrochement, cette zone d'assemblage pouvant recouvrir ledit obturateur d'un entrevous précédent.The other end of the interjoists corresponding to the lateral edge is preferably open and forms an assembly zone connected to the body by a recess, this assembly area may cover said shutter of a previous interjoists.

Dans la forme de réalisation préférée, ledit entrevous comporte des rainures transversales s'étendant entre les bords longitudinaux. Les bords longitudinaux situés aux extrémités des rainures transversales sont avantageusement renforcés et comportent une butée sensiblement verticale, destinée à prendre appui sur le flanc du talon des poutrelles ayant comme effet de verrouiller la position latérale de l'entrevous entre deux poutrelles adjacentes.In the preferred embodiment, said interjoists have transverse grooves extending between the longitudinal edges. The longitudinal edges located at the ends of the transverse grooves are advantageously reinforced and comprise a substantially vertical abutment intended to bear on the side of the heel of the beams having the effect of locking the lateral position of the interjoists between two adjacent beams.

De préférence, l'entrevous comporte des plots en relief répartis sur la partie médiane du corps, destinés à caler en hauteur le treillis métallique du plancher en le surélevant par rapport audit corps.Preferably, the interjoists comprises raised studs distributed on the middle part of the body, intended to wedge height of the metal mesh of the floor by raising it relative to said body.

Description sommaire des dessins :Brief description of the drawings:

  • La présente invention et, ses avantages apparaîtront mieux dans la description suivante d'un mode de réalisation, donné à titre d'exemple non limitatif, en référence aux dessins annexés, dans lesquels :
    • les figures 1A et 1B sont des vues en perspective d'un entrevous selon l'invention, prises respectivement de l'extrémité fermée par un obturateur et de l'extrémité opposée ouverte,
    • la figure 2A est une vue de dessus de l'entrevous des figures 1 et la figure 2B est une vue en coupe longitudinale suivant l'axe AA de la figure 2A,
    • la figure 3 est une vue en bout de l'entrevous des figures 1, du côté de l'obturateur,
    • la figure 4 est une vue en coupe de l'entrevous suivant la section BB de la figure 2B, et
    • la figure 5 est une vue en coupe de l'entrevous suivant les sections CC et DD de la figure 2B superposées.
    The present invention and its advantages will appear better in the following description of an embodiment, given by way of non-limiting example, with reference to the appended drawings, in which:
    • the Figures 1A and 1B are perspective views of a interjoists according to the invention, taken respectively from the closed end by a shutter and from the opposite open end,
    • the Figure 2A is a top view of the interjoists of figures 1 and the Figure 2B is a longitudinal section along the axis AA of the Figure 2A ,
    • the figure 3 is an end view of the interjoists figures 1 , on the shutter side,
    • the figure 4 is a sectional view of the interjoists in section BB of the Figure 2B , and
    • the figure 5 is a sectional view of the interjoists in sections CC and DD of the Figure 2B superimposed.
Illustrations de l'invention et meilleure manière de la réaliser:Illustrations of the invention and best way to achieve it:

L'entrevous selon l'invention est obtenu selon un procédé de fabrication dans lequel on mélange des fibres et/ou des copeaux de bois, par exemple de bois résineux issus de déchets de scieries, agglomérés par un liant durcissable par polymérisation à chaud. Ce liant contient par exemple un composant de la famille des isocyanates polymérisable à 100°C et entre dans le matériau dans une proportion inférieure à 10 % et par exemple comprise entre 3 et 5 %. Bien entendu d'autres types de liant peuvent également convenir. De même et selon la nature du liant, d'autres méthodes peuvent convenir pour obtenir le durcissement du liant.The interjoists according to the invention is obtained according to a manufacturing process in which fibers and / or wood chips, for example resinous wood from sawmill waste, agglomerated by a binder curable by hot polymerization, are mixed. This binder contains, for example, a component of the isocyanate family polymerizable at 100 ° C and enters the material in a proportion of less than 10% and for example between 3 and 5%. Of course other types of binder may also be suitable. Similarly and depending on the nature of the binder, other methods may be suitable to obtain the curing of the binder.

Ce mélange est ensuite mis en forme dans un moule sous une pression d'environ 1000 tonnes/m2 à une température d'au moins 100°C pour obtenir le durcissement du liant au coeur de l'entrevous. Ce matériau en tant que tel existe et est communément commercialisé sous la marque Novopan®. Il est par exemple utilisé dans la fabrication de meubles, de tourets de câbles, de palettes de transport, et pour la première fois dans le bâtiment comme entrevous selon la publication FR 2 858 641 du même demandeur.This mixture is then shaped in a mold under a pressure of about 1000 tons / m 2 at a temperature of at least 100 ° C to obtain the curing of the binder in the interjoists. This material as such exists and is commonly marketed under the trademark Novopan®. It is for example used in the manufacture of furniture, cable drums, transport pallets, and for the first time in the building as interstices according to the publication FR 2,858,641 from the same applicant.

Les avantages de ce matériau permettent de réaliser des entrevous de très haute qualité à l'inverse de ceux réalisés en fibres de bois agglomérées par du ciment, qui sont grossier lourds et cassants, comme dans la publication FR-A-2 756 305 . Ce matériau étant très rigide, il permet de réaliser un entrevous ayant une grande résistance mécanique pour une faible épaisseur et un poids réduit.The advantages of this material make it possible to realize interjoists of very high quality unlike those made of wood fibers agglomerated by cement, which are coarse heavy and brittle, as in the publication FR-A-2,756,305 . This material being very rigid, it allows to realize a interjoists having high mechanical strength for a small thickness and reduced weight.

Plus particulièrement l'entrevous selon l'invention se différencie de celui défini dans la publication FR 2 859 641 par son rapport de l'épaisseur sur la longueur de l'entrevous qui est nettement inférieur et compris sensiblement entre 0,35/100 et 0,5/100. Par exemple, son épaisseur est de l'ordre de 5 à 6 mm et sa longueur de l'ordre de 1,30 m. Pour cette longueur, son poids n'excède pas les 5,5 kg, ce qui est très appréciable pour la manutention et représente une économie d'environ 20 à 30% du poids de l'entrevous de la publication FR 2 858 641 . De plus, ce faible poids permet d'optimiser encore les performances du plancher fini.More particularly, interjoists according to the invention are different from those defined in the publication. FR 2,859,641 its ratio of thickness to the length of the interjoists which is significantly lower and substantially between 0.35 / 100 and 0.5 / 100. For example, its thickness is of the order of 5 to 6 mm and its length of the order of 1.30 m. For this length, its weight does not exceed 5.5 kg, which is very significant for the handling and represents a saving of about 20 to 30% of the weight of the interlude of the publication FR 2,858,641 . In addition, this low weight makes it possible to further optimize the performance of the finished floor.

Ce procédé de fabrication a l'avantage de conférer à l'élément intercalaire un aspect lisse le rendant particulièrement esthétique et lui permettant de rester visible en sous face du plancher si besoin.This manufacturing process has the advantage of giving the intermediate element a smooth appearance making it particularly aesthetic and allowing it to remain visible under the face of the floor if necessary.

Pour atteindre, avec l'entrevous de l'invention, les mêmes performances mécaniques qu'avec celui de la publication FR 2 858 641 , une forme particulière a été donnée à cet entrevous qui est à présent décrit en référence aux figures.To achieve, with the interjoists of the invention, the same mechanical performance as that of the publication FR 2,858,641 a particular form has been given to this interview which is now described with reference to the figures.

L'entrevous 1 présente un pourtour sensiblement rectangulaire définissant deux bords longitudinaux 2 parallèles destinés à prendre appui sur le talon des poutrelles (non représentées) d'un plancher, et deux bords latéraux 3 parallèles destinés à coopérer avec les bords latéraux d'entrevous 1 adjacents ou vers le bord d'un mur ou d'une poutre porteuse. L'entrevous 1 est constitué d'une demi-coque profilée définissant un corps 10, d'épaisseur sensiblement constante dans sa longueur et dans sa largeur, à l'exception de certains endroits stratégiques détaillés plus loin. Cet entrevous 1 a une section cintrée en forme de voûte définie sensiblement par une ellipse, qui présente plusieurs avantages. Le premier avantage réside dans ses performances mécaniques accrues étant donné qu'elle peut résister à des charges supérieures pour une épaisseur de matière plus faible, comparé à l'entrevous de section trapézoïdale de la publication FR 2 858 641 . Le second avantage réside dans sa facilite de fabrication étant donné que la forme elliptique négative donnée au moule permet de déposer une couche de matière de très faible épaisse, ce qui n'est pas possible avec une section formée de segments de droite avec des fortes inclinaisons. De plus, la section cintrée en forme de voûte confère intrinsèquement à l'entrevous une forme dite en contre dépouille permettant à la fois un démoulage aisé et un empilage parfait des entrevous 1 de même forme, dans le but de réduire l'encombrement et le coût du stockage et du transport de ces entrevous 1. Des sections similaires offrant les mêmes performances peuvent également convenir.The interjoists 1 has a substantially rectangular periphery defining two parallel longitudinal edges 2 intended to bear on the heel of the beams (not shown) of a floor, and two parallel side edges 3 intended to cooperate with the lateral edges of interlocks 1 adjacent to or near the edge of a wall or load-bearing beam. The interjoists 1 consists of a profiled half-shell defining a body 10, of substantially constant thickness in its length and in its width, with the exception of certain strategic locations detailed below. This interjoists 1 has a vaulted section vaulted substantially defined by an ellipse, which has several advantages. The first advantage lies in its increased mechanical performance as it can withstand higher loads for a lower material thickness compared to the trapezoidal section interjoists of the publication. FR 2,858,641 . The second advantage lies in its ease of manufacture since the negative elliptical shape given to the mold makes it possible to deposit a layer of material of very low thickness, which is not possible with a section formed of straight segments with strong inclinations . In addition, the arcuate curved section intrinsically gives the interjoists a so-called undercut shape allowing both easy demolding and perfect stacking interjoists 1 of the same shape, in order to reduce clutter and cost of storage and transport of these interjoists 1. Similar sections offering the same performance may also be suitable.

Les bords longitudinaux 2 de l'entrevous 1 comportent un épaulement longitudinal s'étendant sur presque toute la longueur de l'entrevous 1 et définissant un appui 20 sensiblement horizontal (cf. fig. 5) destiné à reposer sur le talon des poutrelles et rattraper le jeu éventuel entre les poutrelles. Dans certaines zones de l'entrevous 1, cet épaulement longitudinal est élargi et définit également une butée 21 sensiblement verticale destinée à prendre appui sur le flanc du talon des poutrelles ayant comme effet de verrouiller la position latérale de l'entrevous 1 entre deux poutrelles adjacentes (cf. fig. 4).The longitudinal edges 2 of the interjoists 1 comprise a longitudinal shoulder extending over almost the entire length of the interjoists 1 and defining a substantially horizontal support 20 (cf. Fig. 5 ) intended to rest on the heel of the beams and make up any play between the beams. In some areas of interjoists 1, this longitudinal shoulder is widened and also defines a substantially vertical stop 21 intended to bear on the flank of the heel of the beams having the effect of locking the lateral position of the interjoists 1 between two adjacent beams (cf. Fig. 4 ).

Une des extrémité de l'entrevous 1 correspondant au bord latéral 3 est fermée par un obturateur 30 intégré et constitué d'une seule pièce avec le corps 10. Cet obturateur 30 ne comporte pas d'épaulement longitudinal et s'étend sur une hauteur supérieure à celle du reste de l'entrevous 1, de sorte que sa base 31 est à un niveau situé sous les bords longitudinaux 2 d'environ l'épaisseur du talon des poutrelles, pour que la base 31 puisse reposer sur un élément porteur d'une construction tel qu'un mur ou une poutre. Grâce à cette construction, l'entrevous 1 situé à l'extrémité d'une travée permet d'obturer l'intervalle existant entre l'entrevous 1, l'élément porteur sur lequel il repose et les poutrelles adjacentes en appui sur cet élément porteur. Ainsi l'entrevous 1 selon l'invention se suffit à lui-même et ne nécessite pas de pièce rapportée, comme un obturateur distinct conformément à la publication FR 2 858 641 . L'obturateur 30 a une forme sensiblement arrondie et en pente évasée vers sa base 31. Il est relié au corps 10 par une zone d'assemblage 32 encadrée par un premier et un second décrochements 33 et 34, dont la fonction est expliquée ci-après.One end of the interjoists 1 corresponding to the lateral edge 3 is closed by an integrated shutter 30 and constituted in one piece with the body 10. This shutter 30 has no longitudinal shoulder and extends over a higher height. to that of the rest of the interjoists 1, so that its base 31 is at a level below the longitudinal edges 2 of about the thickness of the heel of the beams, so that the base 31 can rest on a carrier element of a construction such as a wall or a beam. Thanks to this construction, the interjoists 1 located at the end of a span makes it possible to close off the gap existing between the interjoists 1, the carrier element on which it rests and the adjacent joists bearing on this carrier element. . Thus the interjoin 1 according to the invention is self-sufficient and does not require an insert, as a separate shutter according to the publication FR 2,858,641 . The shutter 30 has a substantially rounded shape and sloping towards its base 31. It is connected to the body 10 by an assembly zone 32 framed by a first and a second recess 33 and 34, the function of which is explained below. after.

L'autre extrémité 4 de l'entrevous 1 est ouverte, ne comporte pas d'épaulement longitudinale, et forme une zone d'assemblage 40 reliée au corps 10 par un décrochement 41. La figure 5 montre la section de la zone d'assemblage 40 de l'entrevous 1 (selon la coupe DD) superposée à la section du corps 10 de l'entrevous 1 (selon la coupe CC) illustrant l'emboîtement possible de l'un dans l'autre. Pour assembler des entrevous 1 disposés consécutivement, deux solutions sont envisageables. Lorsque les entrevous 1 sont utilisés tels quels avec leur obturateur 30, la zone d'assemblage 40 d'un entrevous 1 peut prendre appui sur le premier décrochement 33 défini au sommet de l'obturateur 30 de l'entrevous 1 précédent. Lorsque les entrevous 1, situés en dehors des extrémités des travées, sont découpés pour retirer leur obturateur 30 au niveau du second décrochement 34, la zone d'assemblage 40 d'un entrevous 1 peut être recouverte par le corps 10 de l'entrevous 1 précédent formant une zone d'assemblage complémentaire. Ce type d'assemblage par recouvrement autorise un déplacement longitudinal relatif des entrevous 1 les uns par rapport aux autres permettant d'ajuster la longueur totale d'une rangée d'entrevous 1 mis bout à bout à la longueur des poutrelles ou de la travée, facilitant et réduisant les découpes des entrevous 1.The other end 4 of the interjoists 1 is open, has no longitudinal shoulder, and forms an assembly zone 40 connected to the body 10 by a recess 41. figure 5 shows the section of the assembly zone 40 of the interjoists 1 (according to the section DD) superimposed on the section of the body 10 of the interjoists 1 (according to the section CC) illustrating the possible interlocking of the one in the 'other. To assemble interjoists 1 arranged consecutively, two solutions are conceivable. When interjoists 1 are used as such with their shutter 30, the assembly area 40 of a interjoists 1 can be supported on the first recess 33 defined at the top of the shutter 30 of the interjoin 1 above. When the interjoists 1, located outside the ends of the bays, are cut to remove their shutter 30 at the second recess 34, the assembly area 40 of a interjoists 1 can be covered by the body 10 of the interjoists 1 previous forming a complementary assembly area. This type of overlap assembly allows a relative longitudinal movement of the interjoists 1 relative to each other to adjust the total length of a row of interjoists 1 placed end to end to the length of the beams or the span, facilitating and reducing interjoists cuts 1.

L'entrevous 1 comporte une pluralité de rainures transversales 5 espacées régulièrement, mais pas obligatoirement, et s'étendant d'un bord longitudinal 2 à l'autre. Elles ont une section dans le sens longitudinal en V très évasée pour respecter les contraintes de fabrication (faible épaisseur de matière et contre-dépouille) et peuvent avoir une profondeur égale ou non. Dans l'exemple illustré, l'entrevous 1 comporte cinq rainures transversales 5 dont trois ont une profondeur supérieure aux deux autres. Ces rainures transversales 5 ont plusieurs fonctions. La première fonction consiste à rigidifier l'entrevous 1 en augmentant sa résistance mécanique à la flexion. La seconde fonction consiste à faciliter l'écoulement des eaux pluviales pour éviter qu'elles n'altèrent la qualité du béton qui sera coulé sur les entrevous 1. La troisième fonction consiste à augmenter l'épaisseur du béton coulé, et donc sa masse et son inertie, dans les rainures transversales 5.La quatrième fonction consiste à faciliter la fixation en sous-face des canalisations, gaines, faux plafonds, etc. En effet, l'épaisseur de la paroi de l'entrevous 1 en fond de rainure 5 est plus grande et offre une grande résistance à l'arrachement formant des points d'ancrage idéaux pour tout type d'organes de fixation tels que des vis, goujons, agrafes, etc. Des avant-trous (non représentés) peuvent être prévus directement lors du moulage de l'entrevous 1 pour faciliter le vissage. Les bords longitudinaux 2 situés aux extrémités de ces rainures transversales;5 sont renforcés et comportent conformément à la figure 4 au niveau de l'épaulement longitudinal la butée 21 sensiblement verticale (cf. fig. 4).The interjoists 1 comprises a plurality of transverse grooves 5 spaced regularly, but not necessarily, and extending from one longitudinal edge 2 to the other. They have a section in the longitudinal direction V flared to meet the manufacturing constraints (low material thickness and undercut) and may have an equal depth or not. In the illustrated example, the interjoists 1 comprises five transverse grooves 5, three of which have a depth greater than the other two. These transverse grooves 5 have several functions. The first function is to stiffen the interjoists 1 by increasing its mechanical resistance to bending. The second function is to facilitate the flow of rainwater to avoid that they affect the quality of the concrete that will be poured on interjoists 1. The third function is to increase the thickness of the cast concrete, and therefore its mass and its inertia, in the transverse grooves 5.The fourth function is to facilitate the fixing on the underside of pipes, ducts, false ceilings, etc. Indeed, the thickness of the wall of the interjoists 1 groove bottom 5 is larger and offers a high resistance to tearing forming ideal anchoring points for all types of fasteners such as screws , studs, staples, etc. Pilot holes (not shown) can be provided directly during the molding of the interjoists 1 to facilitate screwing. The longitudinal edges 2 located at the ends of these grooves transverse, 5 are reinforced and include in accordance with the figure 4 at the level of the longitudinal shoulder the substantially vertical stop 21 (cf. Fig. 4 ).

L'entrevous 1 comporte également des plots 6 en relief répartis sur la partie médiane du corps 10, destinés à caler en hauteur le treillis métallique du plancher en le surélevant par rapport au corps 10 de l'entrevous 1 pour obtenir un meilleur enrobage du béton autour du treillis métallique lors du coulage de la dalle de compression. Ces plots 6 ont par exemple une forme allongée, orientée transversalement, définissant une zone d'appui sensiblement horizontale, ou peuvent avoir toute autre forme adaptée. Ces plots 6 sont disposés, dans l'exemple représenté, entre les rainures transversales 5, en quinconce de part et d'autre de l'axe médian longitudinal de l'entrevous 1. Toute autre disposition est envisageable. A titre d'exemple uniquement, ces plots 6 ont une épaisseur au sommet de 6 à 8 mm pour une épaisseur de béton au sommet de l'entrevous 1 de 4 cm. Cette épaisseur est variable en fonction du cahier des charges du plancher.The interjoists 1 also comprises studs 6 in relief distributed over the median part of the body 10, designed to wedge up the wire mesh of the floor by raising it relative to the body 10 of the interjoists 1 to obtain a better coating of the concrete around the wire mesh when pouring the compression slab. These pads 6 have for example an elongate shape, oriented transversely, defining a substantially horizontal bearing zone, or may have any other suitable shape. These pads 6 are arranged, in the example shown, between the transverse grooves 5, staggered on either side of the longitudinal median axis of the interjoists 1. Any other provision is possible. By way of example only, these pads 6 have a thickness at the top of 6 to 8 mm for a concrete thickness at the top of the interjoists 1 of 4 cm. This thickness is variable depending on the specifications of the floor.

Il apparaît de cette description que l'invention permet d'atteindre les buts fixés. La présente invention n'est pas limitée à l'exemple de réalisation décrit mais s'étend à toute modification et variante évidentes pour un homme du métier selon les revendications.It appears from this description that the invention makes it possible to achieve the goals set. The present invention is not limited to the embodiment described but extends to any modification and variation obvious to a person skilled in the art according to the claims.

Claims (11)

  1. Filling member (1) for floor structures with beams, including a substantially rectangular periphery defining two longitudinal edges (2) and two side edges (3, 4), the longitudinal edges (2) being intended to rest on the shoulder of the beams of the floor and the side edges being intended (3, 4) to co-operate at least with the side edges (3, 4) of filling members (1) placed end to end in order to form a row extending over an opening of the floor defined between two adjacent beams, said filling member (1) being made of a profiled half-shell forming a body (10), characterized in that one of the ends of the filling member (1) that corresponds to one of the side edges (3) is closed by an integrated obturator (30) made in one single part with the body (10), said obturator (30) extending over a height higher than that of the body (10) of the filling member (1), and including a base (31) located underneath the longitudinal edges (2), intended to rest on a load-bearing element of the floor.
  2. Filling member according to claim 1, characterized in that said body (10) has a vault-shaped curved cross-section defined substantially by an ellipse.
  3. Filling member according to claim 1 or 2, characterized in that said body (10) has a substantially constant thickness in its length and in its width, the ratio between the thickness of the half-shell and the length of the filling member being substantially comprised between 0.35/100 and 0.5/100.
  4. Filling member according to claim 3, characterized in that for a thickness of the order of 5 to 6 mm and a length of the order of 1.30 m, the weight of said filling member (1) does not exceed 5.5 kg.
  5. Filling member according to any of the previous claims, characterized in that it is produced by casting a mixture of wood fibers and/or chips agglomerated by a hot polymerization-hardenable bonding material.
  6. Filling member according to any of the previous claims, characterized in that said obturator (30) has a substantially rounded shape, with a slope widening towards its base (31).
  7. Filling member according to any of the previous claims, characterized in that said obturator (30) is connected with the body (10) through an assembly zone (32) located between a first and a second step (33 and 34).
  8. Filling member according to any of the previous claims, characterized in that the other end of the filling member (1) that corresponds to the side edge (4) is open and forms an assembly zone (40) connected with the body (10) through a step (41), while this assembly zone (40) can cover said obturator (30) of a previous filling member (1).
  9. Filling member according to any of the previous claims, characterized in that it comprises transversal grooves (5) extending between the longitudinal edges (2).
  10. Filling member according to claim 9, characterized in that the longitudinal edges (2) located at the ends of said transversal grooves (5) are reinforced and include a substantially vertical stop (21), intended to rest on the side of the shoulder of the beams, resulting in the locking of the lateral position of the filling member (1) between two adjacent beams.
  11. Filling member according to any of the previous claims, characterized in that it comprises raised supporting pads (6) distributed on the middle part of the body (10), intended to lock the height of the wire mesh of the floor by lifting it up with respect to said body (10).
EP11290081A 2010-02-12 2011-02-10 Filling member for floor structures with beams Active EP2357293B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11290081T PL2357293T3 (en) 2010-02-12 2011-02-10 Filling member for floor structures with beams

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1051004A FR2956421B1 (en) 2010-02-12 2010-02-12 CONVEYORS FOR FLOOR FLOORS

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EP2357293A1 EP2357293A1 (en) 2011-08-17
EP2357293B1 true EP2357293B1 (en) 2013-01-09

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EP (1) EP2357293B1 (en)
FR (1) FR2956421B1 (en)
PL (1) PL2357293T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011054286B4 (en) * 2011-10-07 2013-07-18 Werzalit Gmbh + Co. Kg Formwork element, which is pressed from a mixture of cellulose-containing chips and a thermosetting binder
FR2996866B1 (en) * 2012-10-12 2015-10-30 Ligerienne Beton BETWEEN YOU
FR3099503B1 (en) 2019-08-02 2023-01-06 Lesage Dev Method for installing formwork spacers for floor joists and corresponding formwork spacers

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1428749A (en) * 1965-03-18 1966-02-18 Robinson Building Tech Ltd Casting form for concrete constructions
AT299504B (en) * 1968-01-19 1972-06-26 Kirchner I A Reinforced concrete rib ceiling
FR2756305B1 (en) 1996-11-22 1999-01-08 Knauf CONCRETE FLOOR WITH LIGHTWEIGHT AND RESISTANT INTERLOCKS
FR2786514B1 (en) * 1998-11-26 2001-01-19 Saret France THIN WALL INTERVIEWS
FR2858343B1 (en) * 2003-07-31 2007-04-20 Fimurex EMBOITABLE MOLDING
FR2858641B1 (en) * 2003-08-04 2005-11-11 Rector METHOD OF MANUFACTURING INTERCALIARY ELEMENTS FOR FLOOR FLOORS, INTERCALAR ELEMENT AND FLOOR OBTAINED
FR2919317B1 (en) * 2007-07-26 2012-08-24 Imerys Tc LIGHTWEIGHT BETWEEN.

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PL2357293T3 (en) 2013-06-28
FR2956421B1 (en) 2012-08-10
EP2357293A1 (en) 2011-08-17
FR2956421A1 (en) 2011-08-19

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