WO1994010409A1 - Support de semelles en bois a ame pleine - Google Patents

Support de semelles en bois a ame pleine Download PDF

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Publication number
WO1994010409A1
WO1994010409A1 PCT/EP1993/002697 EP9302697W WO9410409A1 WO 1994010409 A1 WO1994010409 A1 WO 1994010409A1 EP 9302697 W EP9302697 W EP 9302697W WO 9410409 A1 WO9410409 A1 WO 9410409A1
Authority
WO
WIPO (PCT)
Prior art keywords
projections
carrier according
web
carrier
belt
Prior art date
Application number
PCT/EP1993/002697
Other languages
German (de)
English (en)
Inventor
Artur Schwörer
Original Assignee
Peri B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peri B.V. filed Critical Peri B.V.
Publication of WO1994010409A1 publication Critical patent/WO1994010409A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/14—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with substantially solid, i.e. unapertured, web
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs
    • E04G11/50—Girders, beams, or the like as supporting members for forms

Definitions

  • the invention relates to a wooden belt girder with a full-wall web made of plywood or from a suitable chipboard for concrete system formwork which absorbs the required transverse forces.
  • a formwork skin which consists of a plywood panel or the like and which forms the wall of the concrete formwork, which adjoins the concrete during concreting, is generally fastened to these supports.
  • tines are provided along the edge over the entire length of the full wall web, which engage in grooves extending over the entire length of the webs and are glued there. These tines point you outwards recent cross section.
  • the grooves in the straps have a corresponding cross-section.
  • Belt carriers are also known, the web of which consists of a particle board.
  • the edges of the chipboard are glued into grooves extending over the entire length of the straps.
  • the chipboard which is suitable as a solid web for these beams, must be so stable that they can absorb the transverse forces that occur when these beams are used.
  • the invention has for its object to improve such wooden belt carrier.
  • the web has at its edge individual projections which engage in cutouts (grooves) arranged in sections in the belts and are glued there.
  • An advantage of the invention is that the grooves in the belts do not extend over the entire length of the belt, but in the sections in which no grooves are milled in, the belt is retained in its full strength and the tearing open Belt wood in the area of the grooves is prevented. This also makes it possible to mill the grooves relatively deep into the belt wood there. The recesses in the straps are therefore only provided in the area of the projections.
  • the shape of the projections can be of any type, the recesses then have a shape corresponding to the projections.
  • the shape of the projections running in the web plane can be triangular or rectangular, for example. In one embodiment of the invention, however, the projections and the recesses have the shape of a circular segment, which has the advantage that the recesses are very easy to produce.
  • the recesses can be milled relatively deep into the belt wood without disadvantage.
  • the projections engage more than one third of the height of the straps
  • the cutouts may penetrate two thirds of the height of the straps, and they can even penetrate the entire height.
  • the projections in the cutouts are expediently glued in accordance with the standard regulations for these carriers.
  • the projections can have a cross section that tapers outwards. In one embodiment of the invention, however, the projections have flanks that are parallel to one another, so that the recesses of corresponding shape can be produced very easily.
  • the projections can be arranged along the edge at different distances from one another, so that between two adjacent projections there is a straight edge section which then either lies against the inner edge of the strap wood or engages there in a groove which is substantially less deep than the groove-shaped recesses Recording the protrusions.
  • the edge of the solid wall web runs in a wave shape, the wave crests either engaging completely in the belt wood or but only in part, so that in the latter case the trough forms an opening through the solid wall web adjacent to the belt, which is advantageous for the ventilation of the belt and for the drainage of liquids.
  • Openings formed in some other way can also be provided in the edge region of the multi-wall sheet.
  • the recesses for receiving the projections of the web plate in the two belts are of equal depth. In other embodiments of the invention, this depth of engagement in the upper chord and lower chord can be of different sizes, e.g. B. for special designs.
  • the invention can be implemented both with belt carriers which have a solid wall web made of plywood or a solid wall web made of a chipboard.
  • the projections are only on that layer of
  • Laminated wood is provided, the fibers of which run transversely to the longitudinal direction of the girder, since these layers of the laminated wood best absorb the forces, in particular transverse forces, to which such a belt carrier is exposed when supporting the formlining when pouring the concrete. Above all, the fibers of the belt wood and the web tines cross at the gluing surfaces in the belt, which makes the wearer very robust. This crosswise gluing deep into the belt extends the life of the wearer considerably. It may be expedient to use laminated wood for the multi-wall sheet, in which the layers are provided with fibers running transversely to the longitudinal direction of the beam on the two outer sides of the sheet.
  • the wooden layer with transverse fibers provided in the middle of the board thickness can also have additional projections.
  • the invention is not limited to the fact that a plate is used in which the outer layers of wood have transverse fibers, the plywood can also be composed in some other way, in particular a plywood plate can be used as the web plate, in which the layers are crossed at an angle to the longitudinal direction of the beam Have grain flow.
  • the projections can then be arranged such that at least two layers of wood are provided in these projections, the fibers of which intersect.
  • the projections can have the same thickness as the wood layer on which they are arranged, but they can also be thinner than this wood layer.
  • the solid wall web of which is made of a particle board
  • particle boards can preferably be used in which the majority of the wooden parts of the particle board are oriented so that their wood fibers run transversely to the longitudinal direction of the carrier.
  • the protrusions in a single row can be provided along the edge of the solid wall web.
  • two or more rows spaced apart from one another can be provided along the edge. It is advantageous if the distance between these rows is as large as possible in the case of several rows of projections, since this increases the load-bearing capacity of the carrier. Of course, this distance is limited by the fact that the plate forming the solid wall web does not exceed a thickness determined for price and other reasons.
  • Fig. 1 shows the parts of a wooden belt carrier essential for understanding the invention in cross section.
  • Fig. 2 shows a second embodiment in the same
  • Fig. 3 shows a third embodiment
  • Fig. 4 is a section along the line IV-IV of Fig. 3 and 5 shows a further embodiment in the representation of FIG. 4.
  • a belt carrier consists of two longitudinal belts 1 made of wood, only one of which is shown, and a full wall web plate 2 made of plywood.
  • the plate 2 has three layers, a middle wood layer 3 with a fiber course oriented essentially in the longitudinal direction of the carrier and two wooden layers 4 glued onto the outside of the wooden layer 3, the fibers of which extend transversely to the longitudinal direction of the carrier.
  • the layers 4 are approximately half as thick as the layer 3.
  • the layers 4 have projections or tines 5 which protrude beyond the edge of the layer 3 and lie in the web plane and which are arranged in two rows 6 and 7 one behind the other along the edge of the plate 2 extend, the rows 6 and 7 being at a distance from one another which corresponds to the thickness of the middle wood layer 3.
  • the tines 5 engage in groove-shaped recesses 8 in the belt 1 and are glued there. These tines can have any shape, e.g. B. the wavy shape shown in Fig. 4.
  • the recesses 8 have a shape corresponding to the tines 5.
  • the tines 5 are so large at their largest point that they pass through the belt 1 about two thirds of its thickness, possibly even more. In the embodiment according to FIG.
  • the tines have a wave shape
  • a larger, straight section is provided between the individual wave crests of the tines, in the area of which the belt has no or only slightly deep groove-shaped recesses for receiving projections the web plate has.
  • the depth of the recesses 8 can be chosen so that the edge 9 of the middle wood layer 3 lies tightly against the lower edge 10 of the belt 1. Between the upper end of the tines 5 and the bottom of the grooves 8 there is a small space 27 in which some glue can accumulate when the tines 5 are glued into the recesses 8.
  • the cross section of the tines 5 is rectangular.
  • the width of the tines 5 corresponds in the embodiment according to FIG. 1 to the width of the wooden layers 4, in the embodiment according to FIG. 3 the width of the tines 11 is less than the thickness of the outer wooden layers 12, the grain of which is directed transversely to the longitudinal direction of the carrier.
  • the lateral distance between the two rows 6 and 7 is as large as possible, it corresponds to the thickness of the middle wood layer 3. It can also be larger, as shown in FIG. 3.
  • the embodiment according to FIG. 2 differs from the embodiment according to FIG. 1 in that in the three-layer multi-wall sheet 13 the inner wood layer 14 has a fiber course transverse to the longitudinal direction of the beam, whereas the fibers of the two outer wooden layers 15 run essentially in the longitudinal direction of the beam.
  • the middle wood layer 14 again has rows 16 and 17 of prongs 18 which are arranged at a distance from one another, these prongs having any shape, for example the shape shown in FIG. 4.
  • 3 differs from the embodiment according to FIG. 1 in that the outer layers of wood 12, the fibers of which run transversely to the longitudinal direction of the support, have tines 11 whose width is less than the width of the layers of wood 12.
  • the middle layer 19 also has tines 20 which are only slightly deep compared to tines 11 have and in turn engage in the shape of the tines 20 corresponding recesses 21 in the belt 1.
  • the size of the tines in the embodiment shown in FIG. 3 is different in size at the two edges of the web plate 22, the tines 23 on one edge of the web plate 22 are smaller than the tines 11 on the other edge of the web plate 22.
  • FIG. 4 shows an embodiment in which the tines 5, 11 follow one another in waves in a row of tines, a wave trough 24 lies approximately at the height of the inner surface 10 of the belt 1.
  • the embodiment according to FIG. 5 differs from the embodiment according to FIG. 4 in that the height of the tines 5 is greater than the depth of the recesses 26, so that the trough 24 comes to lie outside the inner surface 10 of the belt 1 and is therefore one Breakthrough 25 forms, provided the other layers of the plywood support in this
  • the tines 5 arranged in rows 6 and 7 are arranged congruently and opposite one another, the tines of one row NEN but also offset in the longitudinal direction with respect to the tines of another row.
  • the tines in the rows do not always have to be the same size over the entire row length. Individual rows of the tines can also have a different tine shape.
  • the tines follow one another, viewed in the longitudinal direction of the carrier, at a distance which is of any size, but preferably corresponds to the length of the tines or is even greater than this. In the area of this distance, the belt has its full, unattenuated cross section.
  • the invention can also be implemented in solid wall girders in which the upper flange is connected to the lower flange by two spaced-apart web walls. Even then, the projections (shafts) can be provided opposite one another or offset from one another.
  • An advantage of the invention is that the wooden formwork beam is much more robust against damage in rough construction work in low height, in particular has a much lower tendency to split than known comparable beams and therefore has a much longer life than known such beams. Nevertheless, this carrier can be produced with relatively little effort. Its overall height can be 20 cm and the straps can have a cross-section of 80 x 46 mm or 80 x 40 mm.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

La présente invention concerne un support de semelles en bois à âme pleine conçu en bois lamellé ou se présentant sous la forme d'un panneau de particules pour systèmes de coffrage de béton. L'invention est caractérisée en ce que l'âme présente sur son bord différentes saillies (5, 11, 18, 23), dans le plan de l'âme, qui s'engagent dans les rainures (6, 7, 16, 17, 26) ménagées par sections dans les semelles (1) et sont collées dans ces rainures.
PCT/EP1993/002697 1992-11-04 1993-10-02 Support de semelles en bois a ame pleine WO1994010409A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4237173.2 1992-11-04
DE19924237173 DE4237173C2 (de) 1992-11-04 1992-11-04 Holzgurtträger mit Vollwandsteg

Publications (1)

Publication Number Publication Date
WO1994010409A1 true WO1994010409A1 (fr) 1994-05-11

Family

ID=6472041

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/002697 WO1994010409A1 (fr) 1992-11-04 1993-10-02 Support de semelles en bois a ame pleine

Country Status (2)

Country Link
DE (1) DE4237173C2 (fr)
WO (1) WO1994010409A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT2297U1 (de) * 1996-11-07 1998-08-25 Doka Ind Gmbh Träger aus holz und verfahren zur herstellung eines stegrohlings

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5722899A (en) * 1998-09-16 2000-04-03 Open Joist 2000 Inc. Structural member
DE10121522C1 (de) * 2001-05-03 2002-10-31 Doka Ind Gmbh Amstetten Schalungsträger
DE102008061623A1 (de) * 2008-12-11 2010-06-17 Doka Industrie Gmbh Schalungsträger

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH324576A (de) * 1954-07-28 1957-10-15 Flueck Hans Träger
FR2067364A1 (fr) * 1969-11-18 1971-08-20 Cobeton Ag
FR2185735A2 (fr) * 1972-05-24 1974-01-04 Cobeton Ag
DE3432654A1 (de) * 1984-09-05 1986-03-13 Österreichische Doka Schalungs- und Gerüstungstechnik GmbH, Amstetten Schalungstraeger aus holz
DE3706710A1 (de) * 1986-03-04 1987-09-10 Jost Mueller Schichtverleimter werkstoff

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7222899U (de) * 1972-09-28 Kistler L Stegträger aus Holz, insbesondere Schalungsträger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH324576A (de) * 1954-07-28 1957-10-15 Flueck Hans Träger
FR2067364A1 (fr) * 1969-11-18 1971-08-20 Cobeton Ag
FR2185735A2 (fr) * 1972-05-24 1974-01-04 Cobeton Ag
DE3432654A1 (de) * 1984-09-05 1986-03-13 Österreichische Doka Schalungs- und Gerüstungstechnik GmbH, Amstetten Schalungstraeger aus holz
DE3706710A1 (de) * 1986-03-04 1987-09-10 Jost Mueller Schichtverleimter werkstoff

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT2297U1 (de) * 1996-11-07 1998-08-25 Doka Ind Gmbh Träger aus holz und verfahren zur herstellung eines stegrohlings

Also Published As

Publication number Publication date
DE4237173A1 (de) 1994-05-05
DE4237173C2 (de) 1996-07-04

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