EP1133605B1 - Embedded timber formwork element, floor cavity and spandrel using same - Google Patents
Embedded timber formwork element, floor cavity and spandrel using same Download PDFInfo
- Publication number
- EP1133605B1 EP1133605B1 EP99954070A EP99954070A EP1133605B1 EP 1133605 B1 EP1133605 B1 EP 1133605B1 EP 99954070 A EP99954070 A EP 99954070A EP 99954070 A EP99954070 A EP 99954070A EP 1133605 B1 EP1133605 B1 EP 1133605B1
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- EP
- European Patent Office
- Prior art keywords
- wall
- floor
- concrete
- floor block
- interjoists
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
-
- 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
- E04B5/28—Cross-ribbed floors
Definitions
- the present invention relates to the field of construction and building, and more particularly lost formwork elements which an application is constituted in the construction of floors, by interjoists and end eardrums.
- Lost formwork elements are elements which, when associated with each other, delimit a volume in which a concrete is poured and which remain associated with concrete, this one once taken to form a coating.
- Document CH-A-449 904 discloses a formwork lost for construction in reinforced concrete which is in matter plastic, thin-walled and ribbed on one side - As described, this product does not exhibit fire resistance.
- thermoplastic material such as polyethylene, polypropylene, polyvinyl chloride (PVC) or polyethylene terephthalate (PET) and their derivatives, which can be produced by molding (injection) in various forms.
- the subject of the invention is an element of lost formwork for a concrete structure that is realized in a flammable thermoplastic material, shaped in thin walls, and consistent with the characterizing part of claim 1.
- the optimal qualities of the material with regard to the fire is obtained on the one hand, when the reliefs have dimensions (height, width ...) which are of the order of the average thickness of the wall on one side of which they are spared and secondly to the extent that the the surfaces of the reliefs perpendicular to the aforementioned face of the element is minimal, just necessary for demolding of the element during its manufacture. It was also realized that, if the qualities of resistance mechanical allow, the thickness of the wall (basic that is to say with the exception of the reliefs) is weak, best are the qualities of the product with regard to the fire.
- the thickness of the base wall is included between 1.5 and 2.5 mm while the reliefs are formed preferably by parallel and / or intersecting ribs of height between 0.8 and 2 mm and also between 0.8 and 2 mm with a pitch or a spacing between 8 and 10 mm.
- the surface condition of the element on its face next to the concrete will be advantageously rough in order to create micro asperities that promote intimate contact between the concrete and the formwork element.
- These micro roughnesses will be obtained by surface treatment (mechanical or chemical) walls of the injection mold.
- An interesting application of the element according to the invention consists of a interjoists for the realization of building floor in association with two joists at prestressed heel or reinforced concrete and parallel.
- the wall of the interjoists is limited by two parallel longitudinal edges and two transverse edges end and this wall affects a general shape bent around a direction parallel to these two edges longitudinal, with its textured side convex side, this wall having a view of this convex side, depressions transverse parallels evenly spaced others that define a succession of compartments in open boxes on the concave side.
- This tympanum has a wall substantially vertical whose external profile is similar to the profile of a cross section of a interjoists, equipped with one side of a horizontal sole at level of the underside of the beam and the other side of a gutter housing the end of the last enter the bay.
- the textured side of this tympanum is that which is in continuation of the concave face of the gutter.
- Figures 1 to 3 are partial diagrams of a formwork element according to the invention, viewed from the of their surface intended to be in contact with the concrete.
- the material used will preferably be polypropylene but can also be polyethylene, polyvinyl chloride vinyl or a PET.
- the element according to the invention has a base wall P whose thickness is denoted e in the figures and whose face F is provided with reliefs R.
- these reliefs are simply constituted by parallel ribs whose width l may vary for example between 1.2 and 3 mm.
- the height h of these grooves can vary from 0.8 to 1.2 mm, the thickness e of the base plate being of the order of 1.5 to 2.5 mm.
- the pitch between the ribs is between 8 and 10 mm and, in the case of Figures 1 to 3 equal to 8 mm.
- the reliefs R are formed by a network of intersecting ribs which define nodes N1, N2, which are sometimes at a maximum altitude relative to the surface F, sometimes to a minimum.
- the thickness e of the plate is of the order of 2.5 mm
- the mesh represented has a dimension of 8 mm
- the altitude of the lower nodes N2 is of the order of 0.8 to 1 mm while the The altitude of the upper nodes is about 2 mm above the surface F.
- the thickness of these ribs is in the variable figure with a maximum in the vicinity of the lower nodes N2 and a minimum in the vicinity of nodes N1 higher. In the example under consideration, this thickness varies between 0.8 and 1.2 mm.
- the surface F of the element P and the upper surfaces of the reliefs have a rough appearance resulting for example from a treatment either chemical or mechanical injection mold of which take out these formwork elements.
- This rough appearance has for the sake of improving the contact of concrete and the formwork element.
- the realized reliefs have dimensions that are of the order the thickness of the base wall P of the element.
- the thickness of this base wall will not be greater than 2.5 mm, even if it is ribbed and consistent to behave like the elements in caissons if the mechanical constraints that must supporting these formwork elements require it.
- This thickness of 2.5 mm was determined by calculation and verified experimentally: beyond that, it seems that the role of heat sink of the concrete compared to siding is reduced and that the qualities of the material to be fire and its spread are clearly decreased.
- a floor consists of a series of T-beams or heel, parallel, usually prestressed concrete or armed, between which we set up a filling - intertwined everything is then covered with a compression table made of cast concrete with a metal frame.
- the spacing between two beams fixed by the constructor and adapted to the width of interjoists the order of 60 to 70 cm).
- the length of the interjoists can to be equal to a few meters if this interview is in light material such as polystyrene or 20 to 25 cm if the interjoists are made of concrete. This dimension is dictated by the weight of the interjoists which is usually handled at the hand on the construction site.
- interjoists are made under form of hollow boxed and partitioned elements the thickness is between 8 and 25 cm, each edge longitudinal interjoists coming to rest on the heel of a T-joists. These are bulky elements and heavy whose transport is penalizing. Like the concrete interjoists are small in size to be weight compatible with manual handling, it have to carry a lot to make a floor.
- this wall is limited by two edges parallel longitudinal and two transverse edges end and affecting a generally curved shape around of a direction parallel to its longitudinal edges, this wall having, seen from its convex side, depressions transverse parallels evenly spaced others that define a succession of compartments in open boxes on the concave side.
- interjoists have properties particularly interesting with regard to fire and its spread like the lost formwork element exposed above.
- the texturing of its convex surface constitutes plus an anti-slip function for workers who circulate on the interjoists.
- FIGS. 4 to 7 there is shown by two exterior views convex surfaces ( Figure 4) and concave (FIG. 7) of a wall 1 of constant thickness which is this interview.
- This wall 1 limited by two longitudinal edges 2 and 3, is usually bent around a direction parallel to these two edges.
- a value possible thickness of the wall is about 2 mm.
- This wall has transverse deformations 4 which appear as depressions on the side convex and in the form of ribs on the concave side of them. These depressions or ribs define a compartmentalization of the interjoists which is then under form of compartments 5 open on the concave side.
- each compartment is planar with, viewed from the convex side, a central recess 6 provided with a grid array of ribs 7 ( Figures 4 and 6).
- the surface of the interjoists is worked in order to increase its roughness and therefore the surface that will be in contact with the concrete of the compression plate to promote its anchoring to this concrete.
- This texturing can affect various shapes: pimples arranged next to each other, pimples whose head is crushed to form a mushroom, a tight grid, a tight grid whose top of the ribs is also crushed to create against undercut surfaces forming retention concrete, more or less closely spaced grooves ...
- the standard longitudinal dimension of a interjoists may for example correspond to 1.20 m or 1.50 m with a compartment width measured at the bottom of depression 4 equal to 150 mm.
- the longitudinal connection of two interjoists and the sealing between them with respect to the concrete is provided by, for example, the overlap of two end gutters 9 which are formed along the transverse edges of the interjoists. These gutters 9 have substantially the same section as the bottom of each depression 4 and their longitudinal profile (transverse to the interjoists) is the same as that of the bottom of each depression 4 and at the same altitude as this one.
- FIG. 6 A detail of Figure 6 illustrates the cooperation of two adjacent interjoists by overlapping their gutter 9 and a locking edge 9a of one of the channels in a retaining tooth 9 b on the other.
- each of the longitudinal edges 2 and 3 of the interjoists rests substantially in the angle a formed by the heel 16a of the beam 16 with its core 16 b. This leaves out a part of the heel 16 is under the interjoists part that can be leveraged for hanging heavier load suspension elements have under the floor as eg false ceilings elements 17. This This possibility does not exist in known interiors known as concrete or polystyrene because these interjoists totally occupy the angle A of each beam 16.
- each can be equipped with a gasket or a part flexible which will ensure a certain tightness between the joist and the interjoists in order to avoid flows of concrete laitance.
- This seal can be a lip is in one piece with the interjoiself itself be reported in the longitudinal edge of it suitably shaped to receive this lip.
- thermoplastics injected to achieve such interjoists.
- thermoformed plastic sheets it is possible to imagine the manufacture of these devices from stamped metal sheets or even thermoformed plastic sheets.
- the interview according to the invention comprises (see FIG. 4) along one of its longitudinal edges a handle 18 for its handling. Since each interview is not very heavy, a worker can take in hands several interjacent ones piled up on the others, as in figure 6, by means of the handles 18 which correspond, thus making it possible to decrease very substantially handling operations on site.
- the element shown in Figure 10 is a tympanum intended to complete a span of interjoists between two beams.
- This eardrum essentially has a wall substantially vertical 20 whose outer surface visible has a texture-style grooves such as represented in FIGS. 1 and 2, this vertical wall being extended by a sole 21 which is substantially perpendicular whereas at the opposite of this sole 21 the tympanum is provided in one piece with the wall vertical 20 of a gutter 22.
- the gutter 22 is intended to receive either the end 9 of a interjoists or one end of it that would have been cut out in the depression. 4.
- the profile of the wall 20 is substantially identical to the transversal profile of a interjoists at the level of each of the caissons while the dimension parallel to joists of the sole 21 which is at the level of the surface of the beams, may be such as to allow an adjustment of the order of 1 to 10 centimeters with respect to the support 23 on which the beams 16 rest.
- the sole 21 is textured for example as shown in Figure 3. Gussets 24 extend between the sole 23 and the wall 20 as stiffeners interjoists. Side flanges 25 a is finally noted, 25 b which rest on the heels of the beams and which have the function of sealing between the eardrum and the joists.
- each eardrum is drawn from a pair of eardrums obtained by injection into an impression double, symmetrical to each other in relation to a line median corresponding to the outer edge of the sole of every eardrum.
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Abstract
Description
La présente invention concerne le domaine de la construction et du bâtiment, et plus particulièrement des éléments de coffrage perdu dont une application est constituée, dans la construction de planchers, par des entrevous et tympans d'extrémité.The present invention relates to the field of construction and building, and more particularly lost formwork elements which an application is constituted in the construction of floors, by interjoists and end eardrums.
Les éléments de coffrage perdu sont des éléments de paroi qui, associés les uns aux autres, délimitent un volume dans lequel est coulé un béton et qui demeurent associés au béton, celui-ci une fois pris pour en former un revêtement.Lost formwork elements are elements which, when associated with each other, delimit a volume in which a concrete is poured and which remain associated with concrete, this one once taken to form a coating.
L'ensemble constitue donc un matériau composite qui doit satisfaire à un certain nombre d'exigences, notamment en matière de résistance au feu et de propagation d'incendie. Or ce sont les éléments de coffrage perdu qui sont au contact de la flamme et ce sont eux qui, principalement, doivent présenter ces qualités de résistance au feu et de réaction au feu pour satisfaire aux tests, essais et normes en vigueur. Dans ce contexte, ces éléments de coffrage perdus sont alors réalisés dans des matériaux complexes à base de composants ignifuges, ce qui les rend chers et demande de mettre en oeuvre des modes de fabrication dont les performances sont limitées en terme de forme possibles.The whole is therefore a composite material who must meet a number of requirements, particularly with regard to fire resistance and propagation fire. But it's the lost formwork elements that are in contact with the flame and it is they who, mainly, must have these qualities of resistance to fire and reaction to fire to meet tests, tests and standards in force. In this context, these lost formwork elements are then made in complex materials based on flame retardant components, which makes them expensive and calls for the implementation of manufacture whose performance is limited in terms of possible form.
On connait par le document CH-A-449 904 un coffrage perdu pour construction en béton armé qui est en matière plastique, à paroi mince et nervuré sur une face - Tel que décrit, ce produit ne présente pas de résistance au feu.Document CH-A-449 904 discloses a formwork lost for construction in reinforced concrete which is in matter plastic, thin-walled and ribbed on one side - As described, this product does not exhibit fire resistance.
Grâce aux mesures spécifiques de l'invention, il a été permis de réaliser des éléments de coffrage perdu en matière thermoplastique bon marché telle que le polyéthylène, le polypropylène, le polychlorure de vinyle (PVC) ou le polyéthylène téraphtalate (PET) et leurs dérivés, aptes à être produits par moulage (injection) dans des formes les plus variées.Thanks to the specific measures of the invention, was allowed to make formwork elements lost in inexpensive thermoplastic material such as polyethylene, polypropylene, polyvinyl chloride (PVC) or polyethylene terephthalate (PET) and their derivatives, which can be produced by molding (injection) in various forms.
Ainsi, l'invention a pour objet un élément de
coffrage perdu pour une structure en béton qui est réalisé
dans un matériau thermoplastique inflammable, conformé en
parois minces,
et conforme à la partie caractérisante de
la revendication 1.Thus, the subject of the invention is an element of
lost formwork for a concrete structure that is realized
in a flammable thermoplastic material, shaped in
thin walls,
and consistent with the characterizing part of
On s'est rendu compte en effet que l' ancrage réparti, qui résulte de la présence de ces reliefs, a pour résultat le fait qu'en présence d'un incendie du côté de l'élément de coffrage perdu, on ne constate qu'une fusion de la matière plastique très locale avec une évacuation importante de la chaleur du côté du béton qui joue le rôle d'un dissipateur d'énergie efficace. Il s'ensuit que l'élément de coffrage ne se décolle pas en bloc du béton et donc ne s'enflamme que très difficilement.We realized that the anchorage distributed, which results from the presence of these reliefs, has for result the fact that in the presence of a fire on the side of the formwork element lost, only a fusion very local plastic material with an evacuation important of the heat of the concrete side that plays the role an effective energy dissipator. It follows that the formwork element does not come off the concrete block and therefore only ignites very easily.
Cette absence de décollement est un facteur très important de non propagation de l'incendie et le matériau composite formé par le béton et son parement thermoplastique appartient à la catégorie des matériaux qui est la moins propice à transmettre le feu alors que la matière thermoplastique seule ne satisfait pas du tout à ce critère.This lack of detachment is a very important factor important non-spread of the fire and the material composite formed by concrete and its facing thermoplastic belongs to the category of materials that is the least conducive to transmitting fire while the thermoplastic material alone does not at all satisfy this criterion.
L'optimal des qualités du matériau à l'égard de l'incendie est obtenu d'une part, lorsque les reliefs ont des dimensions (hauteur, largeur...) qui sont de l'ordre de l'épaisseur moyenne de la paroi sur une face de laquelle ils sont ménagés et d'autre part dans la mesure où la dépouille des surfaces des reliefs perpendiculaires à la face susdite de l'élément est minimale, juste nécessaire au démoulage de l'élément lors de sa fabrication. On s'est rendu compte également que, si les qualités de résistance mécanique le permettent, l'épaisseur de la paroi (de base c'est-à -dire à l'exception des reliefs) est faible, meilleures sont les qualités du produit à l'égard de l'incendie. C'est pourquoi l'épaisseur de la paroi de base est comprise entre 1,5 et 2,5 mm alors que les reliefs sont formés de préférence par des nervures parallèles et/ou sécantes de hauteur comprise entre 0,8 et 2 mm et de largeur comprise également entre 0,8 et 2 mm avec un pas ou un écartement compris entre 8 et 10 mm.The optimal qualities of the material with regard to the fire is obtained on the one hand, when the reliefs have dimensions (height, width ...) which are of the order of the average thickness of the wall on one side of which they are spared and secondly to the extent that the the surfaces of the reliefs perpendicular to the aforementioned face of the element is minimal, just necessary for demolding of the element during its manufacture. It was also realized that, if the qualities of resistance mechanical allow, the thickness of the wall (basic that is to say with the exception of the reliefs) is weak, best are the qualities of the product with regard to the fire. That is why the thickness of the base wall is included between 1.5 and 2.5 mm while the reliefs are formed preferably by parallel and / or intersecting ribs of height between 0.8 and 2 mm and also between 0.8 and 2 mm with a pitch or a spacing between 8 and 10 mm.
Enfin, l'état de surface de l'élément sur sa face en regard du béton sera avantageusement rugueux afin de créer des micro aspérités qui favorisent le contact intime entre le béton et l'élément de coffrage. Ces micro rugosités seront obtenues par un traitement de surface (mécanique ou chimique) des parois du moule d'injection.Finally, the surface condition of the element on its face next to the concrete will be advantageously rough in order to create micro asperities that promote intimate contact between the concrete and the formwork element. These micro roughnesses will be obtained by surface treatment (mechanical or chemical) walls of the injection mold.
Une application intéressante de l'élément selon l'invention consiste en un entrevous pour la réalisation de plancher de bâtiment en association avec deux poutrelles à talon précontraintes ou en béton armé et parallèles. Selon l'invention, la paroi de l'entrevous est limitée par deux bords longitudinaux parallèles et deux bords transversaux d'extrémité et cette paroi affecte une forme générale cintrée autour d'une direction parallèle à ces deux bords longitudinaux, avec sa face texturée du côté convexe, cette paroi comportant vue de ce côté convexe, des dépressions parallèles transversales régulièrement espacées les unes des autres qui définissent une succession de compartiments en caissons ouverts du côté concave.An interesting application of the element according to the invention consists of a interjoists for the realization of building floor in association with two joists at prestressed heel or reinforced concrete and parallel. according to the invention, the wall of the interjoists is limited by two parallel longitudinal edges and two transverse edges end and this wall affects a general shape bent around a direction parallel to these two edges longitudinal, with its textured side convex side, this wall having a view of this convex side, depressions transverse parallels evenly spaced others that define a succession of compartments in open boxes on the concave side.
Enfin, l'invention trouve également une application intéressante lorsqu'elle est réalisée sous forme d'un tympan d'extrémité destiné à compléter une travée d'entrevous. Ce tympan comporte une paroi sensiblement verticale dont le profil extérieur est semblable au profil d'une section transversale d'un entrevous, équipé d'un côté d'une semelle horizontale au niveau de la face inférieure de la poutrelle et de l'autre côté d'une gouttière de logement de l'extrémité du dernier entrevous de la travée. La face texturée de ce tympan est celle qui est en continuation de la face concave de la gouttière.Finally, the invention also finds a interesting application when done under form of an end eardrum intended to complete a Entrevous bay. This tympanum has a wall substantially vertical whose external profile is similar to the profile of a cross section of a interjoists, equipped with one side of a horizontal sole at level of the underside of the beam and the other side of a gutter housing the end of the last enter the bay. The textured side of this tympanum is that which is in continuation of the concave face of the gutter.
D'autres caractĂ©ristiques et avantages de l'invention apparaĂtront au cours de la description donnĂ©e ci-après Ă titre d'exemple de quelques modes de rĂ©alisation. Il sera fait rĂ©fĂ©rence aux dessins annexĂ©s parmi lesquels :
- les figures 1 à 3 illustrent différentes texturations d'un élément de coffrage selon l'invention,
- la figure 4 est une vue partielle extérieure d'un entrevous conforme à l'invention du côté de sa face convexe,
- la figure 5 est une vue en coupe transversale de cet entrevous,
- la figure 6 est une vue en coupe longitudinale partielle illustrant l'empilage de deux entrevous et la coopération de deux entrevous adjacents.
- la figure 7 est un schéma illustrant de manière partielle la coopération d'un entrevous selon l'invention et de deux poutrelles adjacentes de plancher,
- les figures 8 et 9 illustrent divers détails de réalisation de l'entrevous selon l'invention,
- la figure 10 est une vue d'un tympan selon l'invention.
- Figures 1 to 3 illustrate different texturations of a formwork element according to the invention,
- FIG. 4 is an external partial view of a interlock according to the invention on the side of its convex face,
- FIG. 5 is a cross-sectional view of this interjoists,
- Figure 6 is a partial longitudinal sectional view illustrating the stacking of two interjoists and the cooperation of two adjacent interjoists.
- Figure 7 is a diagram partially illustrating the cooperation of a interjoists according to the invention and two adjacent floor beams,
- Figures 8 and 9 illustrate various details of embodiment of the interjoists according to the invention,
- Figure 10 is a view of a tympanum according to the invention.
Les figures 1 à 3 sont des schémas partiels d'un élément de coffrage selon l'invention, vus du côté de leur surface destinée à être au contact du béton. Le matériau utilisé sera de préférence du polypropylène mais peut être également du polyéthylène, du polychlorure de vinyle ou un PET.Figures 1 to 3 are partial diagrams of a formwork element according to the invention, viewed from the of their surface intended to be in contact with the concrete. The material used will preferably be polypropylene but can also be polyethylene, polyvinyl chloride vinyl or a PET.
L'élément selon l'invention possède une paroi de base P dont l'épaisseur est notée e sur les figures et dont une face F est pourvue de reliefs R. Aux figures 1 et 2 ces reliefs sont simplement constitués par des nervures parallèles dont la largeur l peut varier par exemple entre 1,2 et 3 mm. La hauteur h de ces rainures peut quant à elle varier entre 0,8 et 1,2 mm, l'épaisseur e de la plaque de base étant de l'ordre de 1,5 à 2,5 mm. Le pas entre les nervures est compris entre 8 et 10 mm et, dans le cas des figures 1 à 3 égal à 8 mm.The element according to the invention has a base wall P whose thickness is denoted e in the figures and whose face F is provided with reliefs R. In Figures 1 and 2 these reliefs are simply constituted by parallel ribs whose width l may vary for example between 1.2 and 3 mm. The height h of these grooves can vary from 0.8 to 1.2 mm, the thickness e of the base plate being of the order of 1.5 to 2.5 mm. The pitch between the ribs is between 8 and 10 mm and, in the case of Figures 1 to 3 equal to 8 mm.
A la figure 3, les reliefs R sont formés par un réseau de nervures sécantes qui définissent des noeuds N1, N2, lesquels sont tantôt à un maximum d'altitude par rapport à la surface F, tantôt à un minimum. Lorsque l'épaisseur e de la plaque est de l'ordre de 2,5 mm, la maille représentée a pour dimension 8 mm, l'altitude des noeuds N2 inférieurs est de l'ordre de 0,8 à 1 mm tandis que l'altitude des noeuds supérieurs est à environ 2 mm au-dessus de la surface F. En outre, on remarquera que l'épaisseur de ces nervures est sur la figure variable avec un maximum au voisinage des noeuds N2 inférieurs et un minimum au voisinage des noeuds N1 supérieurs. Dans l'exemple considéré, cette épaisseur varie entre 0,8 et 1,2 mm.In Figure 3, the reliefs R are formed by a network of intersecting ribs which define nodes N1, N2, which are sometimes at a maximum altitude relative to the surface F, sometimes to a minimum. When the thickness e of the plate is of the order of 2.5 mm, the mesh represented has a dimension of 8 mm, the altitude of the lower nodes N2 is of the order of 0.8 to 1 mm while the The altitude of the upper nodes is about 2 mm above the surface F. In addition, it will be noted that the thickness of these ribs is in the variable figure with a maximum in the vicinity of the lower nodes N2 and a minimum in the vicinity of nodes N1 higher. In the example under consideration, this thickness varies between 0.8 and 1.2 mm.
En plus, conformément à l'invention, la surface F de l'élément P et les surfaces supérieures des reliefs (voire les surfaces latérales de ceux-ci), présentent un aspect rugueux résultant par exemple d'un traitement soit chimique soit mécanique du moule d'injection duquel sortent ces éléments de coffrage. Cet aspect rugueux a pour avantage d'améliorer le contact du béton et de l'élément de coffrage.In addition, according to the invention, the surface F of the element P and the upper surfaces of the reliefs (or the lateral surfaces of these), have a rough appearance resulting for example from a treatment either chemical or mechanical injection mold of which take out these formwork elements. This rough appearance has for the sake of improving the contact of concrete and the formwork element.
Des exemples ci-dessus on comprend que les reliefs réalisés ont des dimensions qui sont de l'ordre de l'épaisseur de la paroi de base P de l'élément. L'épaisseur de cette paroi de base ne sera pas supérieure à 2,5 mm, quitte à être nervurée et conformée pour se comporter comme les éléments en caissons si les contraintes mécaniques que doivent supporter ces éléments de coffrage le demandent. Cette épaisseur de 2,5 mm a été déterminée par le calcul et vérifiée expérimentalement : au-delà il semblerait que le rôle de dissipateur de chaleur du béton par rapport au parement soit diminué et que les qualités du matériau à l'égard du feu et de sa propagation soient nettement diminuées.Examples above we understand that the realized reliefs have dimensions that are of the order the thickness of the base wall P of the element. The thickness of this base wall will not be greater than 2.5 mm, even if it is ribbed and consistent to behave like the elements in caissons if the mechanical constraints that must supporting these formwork elements require it. This thickness of 2.5 mm was determined by calculation and verified experimentally: beyond that, it seems that the role of heat sink of the concrete compared to siding is reduced and that the qualities of the material to be fire and its spread are clearly decreased.
Une des applications importantes de l'élément de coffrage perdu selon l'invention est un entrevous. On rappellera que dans certains types de réalisations, un plancher comporte une série de poutrelles en T ou à talon, parallèles, généralement en béton précontraint ou armé, entre lesquelles on met en place un remplissage - des entrevous- le tout étant ensuite recouvert d'une table de compression réalisée en béton coulé avec une armature métallique.One of the important applications of the element lost formwork according to the invention is a interjoists. We recall that in certain types of achievements, a floor consists of a series of T-beams or heel, parallel, usually prestressed concrete or armed, between which we set up a filling - intertwined everything is then covered with a compression table made of cast concrete with a metal frame.
Ces éléments ont pour fonction d'une part d'assurer une surface de circulation continue des ouvriers sur le chantier avant la finition du plancher et, d'autre part de former un coffrage de réalisation de la table de compression qui forme la paroi du plancher proprement dite, au-dessus des poutrelles et des entrevous, cette paroi pouvant être ou non recouverte d'une dalle.These elements have the function on the one hand to ensure a continuous circulation area of workers on the building site before finishing the floor and, on the other hand, to form a formwork for realizing the compression table that forms the wall of the floor proper, above the joists and in between, this wall can be covered or not of a slab.
L'écartement entre deux poutrelles fixé par le constructeur et adapté à la largeur des entrevous (de l'ordre de 60 à 70 cm). La longueur de l'entrevous peut être égale à quelques mètres si cet entrevous est en matériau léger comme un polystyrène ou de 20 à 25 cm si l'entrevous est en béton. Cette dimension est dictée par le poids de l'entrevous qui est en général manipulé à la main sur le chantier.The spacing between two beams fixed by the constructor and adapted to the width of interjoists the order of 60 to 70 cm). The length of the interjoists can to be equal to a few meters if this interview is in light material such as polystyrene or 20 to 25 cm if the interjoists are made of concrete. This dimension is dictated by the weight of the interjoists which is usually handled at the hand on the construction site.
Tous les entrevous connus sont réalisés sous forme d'éléments en caissons creux et cloisonnés dont l'épaisseur est comprise entre 8 et 25 cm, chaque bord longitudinal de l'entrevous venant reposer sur le talon d'une poutrelle en T. Il s'agit là d'éléments volumineux et lourds dont le transport est pénalisant. Comme les entrevous en béton sont de petites dimensions pour être d'un poids compatible avec une manutention manuelle, il faut en transporter beaucoup pour réaliser un plancher.All known interjoists are made under form of hollow boxed and partitioned elements the thickness is between 8 and 25 cm, each edge longitudinal interjoists coming to rest on the heel of a T-joists. These are bulky elements and heavy whose transport is penalizing. Like the concrete interjoists are small in size to be weight compatible with manual handling, it have to carry a lot to make a floor.
Grâce à l'invention, on peut réaliser un entrevous léger à l'aide d'une paroi mince nervurée pour offrir une résistance importante à un effort appliqué contre cette paroi (poids d'un homme ou poids d'une épaisseur de béton) réalisée dans une matière plastique bon marché et légère. A cet effet, dans un mode préféré de réalisation, cette paroi est limitée par deux bords longitudinaux parallèles et deux bords transversaux d'extrémité et affectant une forme générale cintrée autour d'une direction parallèle à ses bords longitudinaux, cette paroi comportant, vue de son côté convexe, des dépressions parallèles transversales régulièrement espacées les unes des autres qui définissent une succession de compartiments en caissons ouverts du côté concave. Cet entrevous confère à la face inférieure d'une table de compression une structure en caisson, c'est-à -dire une succession de petites parties voûtées, séparées par des nervures transversales s'étendant d'une poutrelle à l'autre, ce qui confère un caractère particulièrement résistant à la table de compression qui peut n'être que d'une épaisseur de 4 cm au-dessus de chaque entrevous.Thanks to the invention, it is possible to realize a light interjoists using a ribbed thin wall to offer significant resistance to an applied effort against this wall (weight of a man or weight of a concrete thickness) made of a plastic material cheap and light. For this purpose, in a preferred mode of embodiment, this wall is limited by two edges parallel longitudinal and two transverse edges end and affecting a generally curved shape around of a direction parallel to its longitudinal edges, this wall having, seen from its convex side, depressions transverse parallels evenly spaced others that define a succession of compartments in open boxes on the concave side. This interview confers on the underside of a compression table a box structure, that is to say a succession of small vaulted parts, separated by ribs cross beams extending from one beam to the other, this which gives a particularly resistant character to the compression table that can only be one thick 4 cm above each interjoists.
Bien entendu l'entrevous possède des propriétés particulièrement intéressantes à l'égard du feu et de sa propagation comme l'élément de coffrage perdu exposé ci-dessus. La texturation de sa surface convexe constitue en plus une fonction anti-glissement pour les ouvriers qui circulent sur l'entrevous.Of course the interjoists have properties particularly interesting with regard to fire and its spread like the lost formwork element exposed above. The texturing of its convex surface constitutes plus an anti-slip function for workers who circulate on the interjoists.
Ainsi, aux figures 4 à 7, on a représenté par
deux vues extérieures les surfaces convexe (figure 4) et
concave (figure 7) d'une paroi 1 d'Ă©paisseur constante qui
constitue cet entrevous. Cette paroi 1, limitée par deux
bords longitudinaux 2 et 3, est généralement cintrée autour
d'une direction parallèle à ces deux bords. Une valeur
possible de l'Ă©paisseur de la paroi est d'environ 2 mm.Thus, in FIGS. 4 to 7, there is shown by
two exterior views convex surfaces (Figure 4) and
concave (FIG. 7) of a
Cette paroi possède des déformations transversales
4 qui apparaissent sous forme de dépressions du côté
convexe et sous forme de nervures du côté concave de
celles-ci. Ces dépressions ou nervures définissent un
cloisonnement de l'entrevous qui se présente alors sous
forme de compartiments 5 ouverts du côté concave.This wall has
De manière plus précise, la paroi de fond 5a de
chaque compartiment est plane avec, vu du côté convexe, un
renfoncement central 6 pourvu d'un réseau quadrillé de
nervures 7 (figures 4 et 6). Toujours du côté convexe, la
surface de l'entrevous est travaillée afin d'augmenter sa
rugosité et donc la superficie qui sera en contact avec le
béton de la plaque de compression afin de favoriser son
ancrage à ce béton. Cette texturation peut affecter
diverses formes : des picots disposés l'un à côté de
l'autre, des picots dont la tête est écrasée pour former un
champignon, un quadrillage serré, un quadrillage serré dont
le sommet des nervures est également écrasé pour créer des
surfaces en contre dépouille formant rétention du béton,
des rainures plus ou moins rapprochées... Cette texturation
est partiellement représentée à la figure 4, référée 8a
pour les zones planes de l'entrevous (réseau de nervures
sécantes comme à la figure 3 par exemple) et 8b pour les
autres zones (nervures parallèles comme aux figures 1 et 2
par exemple). Le rĂ´le de cette texturation de la surface
convexe de la plaque 1 formant entrevous est comme dit ci-dessus
d'augmenter l'intimité du contact entrevous-béton.
On a donc pu envisager la fabrication par injection moulage
d'entrevous dans un matériau extrêmement bon marché tel que
le polypropylène, ce qui, en plus des avantages liés au
poids et au volume d'un entrevous Ă paroi mince est un
facteur non négligeable sur le coût de fabrication d'un tel
dispositif.More specifically, the
La dimension longitudinale standard d'un entrevous
peut par exemple correspondre Ă 1,20 m ou Ă 1,50 m
avec une largeur de compartiment mesurée en fond de
dépression 4 égale à 150 mm. Le raccordement longitudinal
de deux entrevous et l'étanchéité entre eux à l'égard du
béton est assuré par, par exemple, le chevauchement de deux
gouttières d'extrémité 9 qui sont formées le long des bords
transversaux de l'entrevous. Ces gouttières 9 ont
sensiblement la mĂŞme section que le fond de chaque
dĂ©pression 4 et leur profil longitudinal (transversal Ă
l'entrevous) est le mĂŞme que celui du fond de chaque
dépression 4 et à la même altitude que celui-ci. En outre,
ces gouttières en se chevauchant s'agrafent mutuellement
par le biais de languettes sécables ou autres dispositifs
en dents de sapin ménagés dans l'une des gouttières
coopérant avec des ouvertures prévues à cet effet en
correspondance dans l'autre des gouttières. Un détail de la
figure 6 illustre la coopération de deux entrevous
adjacents par chevauchement de leur gouttière 9 et
encliquetage d'un bord 9a de l'une des gouttières sous une
dent de retenue 9b de l'autre.The standard longitudinal dimension of a interjoists may for example correspond to 1.20 m or 1.50 m with a compartment width measured at the bottom of
Comme il est peu vraisemblable que tous les
planchers soient un multiple de 150 mm, il convient de
prĂ©voir des moyens pour ajuster la longueur des entrevous Ă
la longueur des poutrelles qui les accueillent. Ces moyens
sont représentés aux figures 4 et 6 par des marques
transversales telles que 10 qui constituent des guides de
sciage de l'entrevous. Les entrevous sciés se raboutent les
uns aux autres tout simplement par juxtaposition et pour
prĂ©server l'Ă©tanchĂ©itĂ© on met en place un ruban adhĂ©sif Ă
cheval sur le joint. Ce ruban adhésif constitue en même
temps un signe d'Ă©vitement pour les ouvriers amenĂ©s Ă
circuler sur les entrevous. A ce propos d'ailleurs, on
notera que la texturation 8a de la surface supérieure de
chacun des compartiments des entrevous constitue en plus
d'une multiplication de superficie destinée à la bonne
coopération béton - matière plastique, des moyens antidérapants
pour les ouvriers circulant sur ces planchers en
cours de construction. On peut également prévoir de scier
un entrevous en fond de dépression 4 et d'ajuster la
longueur d'une travée à l'aide du tympan représenté à la
figure 10.As it is unlikely that all floors are a multiple of 150 mm, it is necessary to provide means to adjust the length of interjoists to the length of the beams that accommodate them. These means are shown in FIGS. 4 and 6 by transverse marks such as 10 which constitute sawing guides for the interjoists. The sawed interjoists are attached to each other simply by juxtaposition and to preserve the seal is put in place adhesive tape straddling the joint. This tape is at the same time a sign of avoidance for the workers brought to circulate on interjoists. In this way, it will be appreciated that the
Il est possible également de prévoir dans la
paroi de l'entrevous, des zones sécables à résistance
affaiblie, par exemple des trous à déboucher 11 prévus dans
des endroits appropriés et notamment dans les parties
planes de la paroi de chaque compartiment et ce, par
exemple, à un pas fixe déterminé. Ces zones sécables ou
trous à déboucher permettent de mettre en place avant la
coulée du béton un certain nombre d'inserts, de passages ou
de réservations grâce auxquels un équipement ultérieur du
plancher est facilité. Pour les mêmes raisons fonctionnelles,
il est tout à fait possible de prévoir au fond de
chacune ou certaines des dépressions 4 des plots 12
susceptibles d'accueillir des vis auto-taraudeuses pour la
suspension de divers accessoires. Il est aussi possible de
prévoir des logements 13, notamment au sommet des nervures
4 vues du côté concave, dans lesquels peuvent se glisser
toutes sortes d'organes de fixation et notamment des
harpons 14 pour retenir une couche de produit isolant
(figure 8).It is also possible to predict in the
wall of interjoists, breakable zones with resistance
weakened, for example holes to be opened 11 provided in
appropriate places and in particular in the parts
planes of the wall of each compartment and this, by
example, at a determined fixed step. These breakable areas or
holes to unclog allow to put in place before the
pouring concrete a number of inserts, passages or
of reservations by which subsequent equipment of the
floor is easy. For the same functional reasons,
it is quite possible to foresee
each or some of the
Il est intéressant de noter que la constitution
d'un entrevous sous forme d'une paroi fine présente
l'avantage illustré par les figures 7 et 9. Cet avantage
réside dans le fait que chacun des bords longitudinaux 2 et
3 de l'entrevous repose pratiquement dans l'angle A que
forme le talon 16a de la poutre 16 avec son âme 16b. Ceci
laisse découvert toute une partie du talon 16a sous
l'entrevous, partie qui peut ĂŞtre mise Ă profit pour y
accrocher des éléments de suspension de charge plus
importante Ă disposer sous le plancher telle que par
exemple des éléments de faux plafonds 17. Cette possibilité
n'existe pas dans les entrevous connus en béton ou en
polystyrène car ces entrevous occupent totalement l'angle A
de chaque poutrelle 16.It is interesting to note that the constitution of a intervous in the form of a thin wall has the advantage illustrated by FIGS. 7 and 9. This advantage lies in the fact that each of the
Enfin, l'extrémité longitudinale de chaque entrevous peut être équipée d'un joint ou d'une partie flexible qui permettra d'assurer une certaine étanchéité entre la poutrelle et l'entrevous afin d'éviter des écoulements de laitance de béton. Ce joint peut être une lèvre soit en une seule pièce avec l'entrevous lui-même soit rapportée dans le bord longitudinal de celui-ci conformé de manière adéquate pour recevoir cette lèvre.Finally, the longitudinal end of each can be equipped with a gasket or a part flexible which will ensure a certain tightness between the joist and the interjoists in order to avoid flows of concrete laitance. This seal can be a lip is in one piece with the interjoiself itself be reported in the longitudinal edge of it suitably shaped to receive this lip.
Ce n'est pas sortir du cadre de l'invention que de prévoir un autre matériau que les matières thermoplastiques injectées pour réaliser de tels entrevous. En effet, il est possible d'imaginer la fabrication de ces dispositifs à partir de feuilles métalliques embouties ou même de feuilles de matière plastique thermoformées.It is not outside the scope of the invention that to provide a material other than the materials thermoplastics injected to achieve such interjoists. Indeed, it is possible to imagine the manufacture of these devices from stamped metal sheets or even thermoformed plastic sheets.
On notera par ailleurs que l'entrevous selon
l'invention comporte (voir figure 4) le long d'un de ses
bords longitudinaux une poignée 18 pour sa manutention.
Comme chaque entrevous n'est pas très lourd, un ouvrier
peut prendre en mains plusieurs entrevous empilés les uns
sur les autres, comme en figure 6, au moyen des poignées 18
qui se correspondent, permettant ainsi de diminuer très
sensiblement les opérations de manutention sur chantier.Note also that the interview according to
the invention comprises (see FIG. 4) along one of its
longitudinal edges a
Avant de mettre en place l'entrevous entre deux
poutrelles, on casse la poignée 18 et on peut se servir de
celle-ci comme d'un moyen de calage des entrevous notamment
contre le soulèvement sous l'effet du vent en plaçant cette
poignée 18 à cheval sur une poutrelle 16 qu'elle enserre
Ă©lastiquement (voir figure 7).Before setting up the interjoists between two
beams, we break the
L'élément représenté à la figure 10 est un tympan
destiné à compléter une travée d'entrevous entre deux
poutrelles. Ce tympan comporte essentiellement une paroi
sensiblement verticale 20 dont la surface extérieure
visible possède une texture du style rainures telles que
représentées aux figures 1 et 2, cette paroi verticale
étant prolongée par une semelle 21 qui lui est sensiblement
perpendiculaire tandis qu'à l'opposé de cette semelle 21 le
tympan est pourvu en une seule pièce avec la paroi
verticale 20 d'une gouttière 22. La gouttière 22 est
destinée à recevoir soit l'extrémité 9 d'un entrevous soit
une extrémité de celui-ci qui aurait été découpée dans le
fond d'une dépression 4. En effet, on peut prévoir que les
entrevous soient découpés non pas le long de lignes 10
d'ajustement de longueur d'une travée à la longueur des
poutrelles qui la délimitent mais uniquement au fond de
chacune des dépressions 4. Elle assure l'étanchéité entre
le tympan et l'entrevous à l'égard du béton coulé. Ainsi le
tympan constitue un soutien ferme à une extrémité
d'entrevous et assure l'étanchéité à l'égard du béton
coulé.The element shown in Figure 10 is a tympanum
intended to complete a span of interjoists between two
beams. This eardrum essentially has a wall
substantially vertical 20 whose outer surface
visible has a texture-style grooves such as
represented in FIGS. 1 and 2, this vertical wall
being extended by a sole 21 which is substantially
perpendicular whereas at the opposite of this sole 21 the
tympanum is provided in one piece with the wall
vertical 20 of a
Le profil de la paroi 20 est sensiblement
identique au profil transversal d'un entrevous au niveau de
chacun des caissons tandis que la dimension parallèle aux
poutrelles de la semelle 21 qui est au niveau de la surface
inférieure des poutrelles, peut être telle qu'elle permette
un ajustement de l'ordre de 1 à 10 centimètres à l'égard de
l'appui 23 sur lequel reposent les poutrelles 16.The profile of the
La semelle 21 est texturée par exemple comme
représenté à la figure 3. Des goussets 24 s'étendent entre
la semelle 23 et la paroi 20 en guise de raidisseurs de
l'entrevous. On notera enfin des rebords latéraux 25a, 25b
qui s'appuient sur les talons des poutrelles et qui ont
pour fonction d'assurer l'étanchéité entre le tympan et les
poutrelles.The sole 21 is textured for example as shown in Figure 3.
De manière préférée, chaque tympan est tiré d'une paire de tympans obtenus par injection dans un empreinte double, symétriques l'un de l'autre par rapport à une ligne médiane correspondant au bord extérieur de la semelle de chaque tympan.Preferably, each eardrum is drawn from a pair of eardrums obtained by injection into an impression double, symmetrical to each other in relation to a line median corresponding to the outer edge of the sole of every eardrum.
Claims (11)
- A permanent formwork element for a concrete structure, the element being made of an inflammable thermoplastic material shaped to form a thin wall (P) that is ribbed on one face, the element being characterized in that the thickness of said wall lies in the range 1.5 mm to 2.5 mm, in that the face (F) of said wall that is to come into contact with concrete is provided in full with texturing in the form of portions (R) in relief of height (h) and width (â„“) that are of the same order as the mean thickness of the wall (P), and that are spaced apart by an amount lying in the range 8 mm to 10 mm so as to provide the element with anchoring to the concrete that is distributed over all of the above-mentioned face (F) and so as to provide an increased area of contact between the element and the concrete in order to encourage heat exchange between them.
- A formwork element according to claim 1, characterized in that the surface for making contact with concrete is rough.
- A formwork element according to either preceding claim, characterized in that it is made of injection-molded polypropylene.
- A floor block constituting an application of the element according to any preceding claim for making a building floor in association with two parallel joists (16), the floor block being characterized in that the wall (1) is defined by two parallel longitudinal edges (2, 3) and by two end transverse edges (9) and takes on a shape that is generally curved about a direction parallel to its two longitudinal edges (2, 3), with its textured face being on the convex side, said wall (1), when seen from its convex side, including parallel transverse depressions (4) that are regularly spaced apart from one another and that define a succession of box compartments (5) that are open to the concave side.
- A floor block according to claim 4, characterized in that the section of a depression (4) in the wall on a plane parallel to its longitudinal edges is V-shaped, thus defining ribs for the bottom face of the compression panel, said ribs extending transversely relative to the joist
- A floor block according to claim 4 or claim 5, characterized in that its convex surface includes rectilinear marks (10) parallel to the depressions (4) and forming guide lines for cutting the floor block transversely.
- A floor block according to any one of claims 4 to 6, characterized in that the wall portion (5a) forming the top of each box (5) is substantially plane and includes zones of weakness (11) that are regularly spaced apart from one another so as to be easily separable from the remainder of the wall.
- A floor block according to any one of claims 4 to 7, characterized in that it includes a separable handle (18) extending along one of its longitudinal edges.
- A floor block according to any one of claims 4 to 8, characterized in that it includes end gutters (9) similar in shape and in disposition to the bottom of each depression (4) and including snap-fastening means (9a, 9b) for engaging with the gutter of an adjacent floor block.
- An end face constituting an application of the permanent formwork element according to any one of claims 1 to 3 for finishing off a span of floor blocks according to claim 4 at the end of flanged joists (16), the end face being characterized in that it comprises a substantially vertical wall (20) of outside profile similar to the profile of a cross-section of a floor block, and fitted on one side with a horizontal soleplate (21) level with the bottom face of the joist, and on the other side with a gutter for receiving the end of the last floor block of the span.
- A floor made using floor blocks (1) according to any one of claims 4 to 9, and parallel flanged beams (16), the floor being characterized in that each of the longitudinal edges (3, 4) of the floor blocks rest in the corner (A) between a flange and a joist, thus releasing the end-most portion of each flange (16a) of the joist which is left accessible for other uses.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9814890A FR2786514B1 (en) | 1998-11-26 | 1998-11-26 | THIN WALL INTERVIEWS |
FR9814890 | 1998-11-26 | ||
PCT/FR1999/002710 WO2000031355A1 (en) | 1998-11-26 | 1999-11-05 | Embedded timber formwork element, floor cavity and spandrel using same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1133605A1 EP1133605A1 (en) | 2001-09-19 |
EP1133605B1 true EP1133605B1 (en) | 2005-07-06 |
Family
ID=9533211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99954070A Expired - Lifetime EP1133605B1 (en) | 1998-11-26 | 1999-11-05 | Embedded timber formwork element, floor cavity and spandrel using same |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1133605B1 (en) |
AT (1) | ATE299212T1 (en) |
AU (1) | AU1052400A (en) |
DE (1) | DE69926073T2 (en) |
ES (1) | ES2245517T3 (en) |
FR (1) | FR2786514B1 (en) |
WO (1) | WO2000031355A1 (en) |
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EP1923519A1 (en) * | 2006-11-16 | 2008-05-21 | Kp1 | Device for ventilating a crawl space |
FR2916212A1 (en) * | 2007-05-15 | 2008-11-21 | Rector Lesage Sa | Floor e.g. reinforced concrete floor, insulating device for building, has L-shaped covering tab formed in bottom part, and partly covering adjacent needle beam on which two adjacent beams are maintained |
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FR2830883A1 (en) * | 2001-10-11 | 2003-04-18 | Jean Pieere Duclos | Lost formwork is fixed by successive male-female fitting to enclose any type of carrying element |
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 |
FR2866041B1 (en) | 2004-02-10 | 2006-04-28 | Kp1 | ELEMENT OF INTERVIEW |
ITPD20040087A1 (en) * | 2004-04-01 | 2004-07-01 | Assounisol Srl | PREFABRICATED MODULAR ELEMENT FOR THE REALIZATION OF LIGHTENINGS IN SLABS WITH LATERAL BEAMS OR PREDALLE SHEETS |
EP1736607B1 (en) * | 2005-06-23 | 2012-01-11 | Plasticform S.R.L. | Light and insulating device and system for buildings |
FR2915218B1 (en) | 2007-04-23 | 2009-06-05 | Kp1 Soc Par Actions Simplifiee | SUSPENSION ELEMENT FOR ADJUSTABLE SUSPENSION SYSTEM. |
FR2916215B1 (en) * | 2007-05-14 | 2009-07-10 | Kp1 Soc Par Actions Simplifiee | INJECTED PLASTIC MATERIALS |
FR2956421B1 (en) | 2010-02-12 | 2012-08-10 | Rector Lesage | CONVEYORS FOR FLOOR FLOORS |
FR2961226A1 (en) * | 2010-06-15 | 2011-12-16 | Applic Composants Guiraud Freres Soc Et | IMPROVEMENT IN HOURDIS MOULES |
FR2982627A1 (en) * | 2011-11-10 | 2013-05-17 | Jacques Favre | Mask for beam used in formation of e.g. interjoists in construction of building, has clamping unit for clamping mask in groove provided on interjoist, where mask is molded by extrusion process using same polymer as that of interjoist |
FR3099503B1 (en) | 2019-08-02 | 2023-01-06 | Lesage Dev | Method for installing formwork spacers for floor joists and corresponding formwork spacers |
FR3144177A1 (en) * | 2022-12-23 | 2024-06-28 | Edilteco France | Reversible thin-walled spacer |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
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DE1286730B (en) * | 1963-12-11 | 1969-01-09 | Hanekamp Hermann | Plastic filler for the production of concrete cassette, ribbed ceilings or the like. |
DE1434497A1 (en) * | 1964-04-25 | 1968-10-31 | Stakelbeck Dr Ing Hans | Formwork body |
AT283680B (en) * | 1965-05-21 | 1970-08-10 | Bucher Franz | Formwork element |
GB1129892A (en) * | 1965-11-08 | 1968-10-09 | Atlas Stone Company Ltd | Improvements relating to the construction of floors or roofs |
US3642559A (en) * | 1970-02-20 | 1972-02-15 | William S Stokes | Membrane-lined structural panel |
FR2144611A2 (en) * | 1971-07-08 | 1973-02-16 | Areco | |
DE2250295A1 (en) * | 1971-10-19 | 1973-04-26 | Emballages De Quevilly Petit Q | LOST FORMWORK IN CURVED FORM |
DE2161376A1 (en) * | 1971-12-10 | 1973-06-14 | Rheinbau Gmbh | REINFORCED REINFORCED CONCRETE SLABS |
FR2188489A5 (en) * | 1972-06-09 | 1974-01-18 | Ind Concrete Products Ltd | |
GB2077792B (en) * | 1980-03-22 | 1983-06-08 | Tinsley Building Prod Ltd | Casting reinforced concrete floors |
DE3624447A1 (en) * | 1986-07-19 | 1988-01-21 | Betomax Kunststoff Metall | INSERT BODY TO BE PLACED IN CONCRETE |
FR2682411A1 (en) * | 1991-10-15 | 1993-04-16 | Ailhaud Jean Michel | Insulating prefabricated floor system with built-in compression flange |
IT1264099B1 (en) * | 1993-03-26 | 1996-09-10 | Ondaplast Spa | PRODUCTS FOR THE MANUFACTURE OF SLABS WITH LIGHTENING BOX ELEMENTS AND SLABS MADE WITH SUCH PRODUCTS. |
-
1998
- 1998-11-26 FR FR9814890A patent/FR2786514B1/en not_active Expired - Lifetime
-
1999
- 1999-11-05 ES ES99954070T patent/ES2245517T3/en not_active Expired - Lifetime
- 1999-11-05 AT AT99954070T patent/ATE299212T1/en not_active IP Right Cessation
- 1999-11-05 WO PCT/FR1999/002710 patent/WO2000031355A1/en active IP Right Grant
- 1999-11-05 DE DE69926073T patent/DE69926073T2/en not_active Expired - Lifetime
- 1999-11-05 EP EP99954070A patent/EP1133605B1/en not_active Expired - Lifetime
- 1999-11-05 AU AU10524/00A patent/AU1052400A/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1923519A1 (en) * | 2006-11-16 | 2008-05-21 | Kp1 | Device for ventilating a crawl space |
FR2916212A1 (en) * | 2007-05-15 | 2008-11-21 | Rector Lesage Sa | Floor e.g. reinforced concrete floor, insulating device for building, has L-shaped covering tab formed in bottom part, and partly covering adjacent needle beam on which two adjacent beams are maintained |
Also Published As
Publication number | Publication date |
---|---|
DE69926073T2 (en) | 2006-04-20 |
FR2786514B1 (en) | 2001-01-19 |
DE69926073D1 (en) | 2005-08-11 |
ES2245517T3 (en) | 2006-01-01 |
ATE299212T1 (en) | 2005-07-15 |
EP1133605A1 (en) | 2001-09-19 |
FR2786514A1 (en) | 2000-06-02 |
WO2000031355A1 (en) | 2000-06-02 |
AU1052400A (en) | 2000-06-13 |
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