EP3247842A1

EP3247842A1 - Formwork support and formwork construction

Info

Publication number: EP3247842A1
Application number: EP16701280.6A
Authority: EP
Inventors: Gregor Wenighofer
Original assignee: Doka GmbH
Current assignee: Doka GmbH
Priority date: 2015-01-21
Filing date: 2016-01-21
Publication date: 2017-11-29
Anticipated expiration: 2036-01-21
Also published as: WO2016116532A1; CN205637585U; EP3247842B1

Abstract

Formwork support (3) comprising a first girder element (6) composed of a wood material, a second girder element (7) composed of a wood material and a crosspiece element (8) connecting the first girder element (6) with the second girder element (7), wherein the crosspiece element (8) has at least one projection (9) on the one longitudinal side for connecting to the first girder element (6) and/or has at least one second projection (10) on the other longitudinal side for connecting to the second girder element (7), and comprising at least one first reinforcement element (11) extended in the longitudinal direction (5) of the first girder element (6), which is arranged in a corresponding recess (12) of the first girder element (6), wherein the at least one reinforcement element (11) is adjacent to the at least one first projection (9) of the crosspiece element (8).

Description

Formwork support and formwork construction

The invention relates to a formwork support having a first strap element from a wood material, a second strap element from a wood material and a first belt member to the second chord member interconnecting web member, said Stegele ^¬ element on one longitudinal side at least one first projection for communicating with the first belt member and / or on the other longitudinal side has at least one second projection for connection to the second belt element, and with at least one extending in the longitudinal direction of the first belt member first reinforcing element, which is arranged in a corresponding recess of the first belt member.

Furthermore, the invention relates to a formwork construction, which is particularly adapted for the production of a ceiling, with a plurality of support elements, on which formwork supports are supported, with which further, extending transversely Scha ^¬ lung carrier are supported, are arranged on the top Schalungsplat ^¬ th.

Shutterings with an I-shaped cross section are shown, for example, in DE 103 05 613 B4 or in DE 1 958 002. The formwork beams have two straps, which are connected to each other via a web. The straps are usually made of a first wood material, the web element made of a two ^¬ th wood material. Such formwork supports are used in structural engineering for supporting shuttering panels, with which a concrete ceiling is produced. The Schalungsträ ^¬ ger be supported here on a support device in the form of ceiling props. In the installed state, the saddle ^¬ lung carrier are exposed to high operating loads which act on the slabs forth on the formwork carrier. Accordingly, a high load capacity of the formwork support is required.

Against this background in the prior art Schalungsträ ^¬ ger have been proposed in the form of metal profiles (eg see GB. 2036150 A), on the one hand have a high stability and On the other hand, bring the advantage that can be easily integrated mounting rails for connecting system components in the metal profiles. However, the disadvantage is the high cost of metal formwork beams. Furthermore, it is disadvantageous that the driving in of nails for fastening shuttering panels is made possible only in the area of a nail strip made of wood.

Furthermore, in US 4,584,809 a formwork support has been described with a top flange made of wood, wherein the bottom flange is formed as an aluminum extrusion profile with a T-rail.

In addition, in US 2005/0284078 a formwork support has been proposed with two wooden belts, wherein in the lower belt of the formwork support a metal rail is used. In this way, fastening means such as bolts, are anchored in the Me ^¬ tallschiene. Therefore, this embodiment combines the advantages of a formwork support made of wood with the Metallträ ^¬ like known way to connect fasteners. The disadvantage, however, is that the load capacity of the known formwork support remains well behind the metal beams. Extensive load tests have shown that the load-carrying capacity of the wooden girder with the metal rail is not completely satisfactory.

Finally, US 5,050,366 describes a wooden beam consisting of several layers of wood reinforced with several metal bars.

In contrast, the object of the present invention is to provide a formwork support of the type mentioned, with which the disadvantages of the prior art be ^¬ sided or alleviated. The invention is therefore particularly aimed at improving the carrying capacity of the formwork support, without having to give up the timber construction of the straps.

This object is achieved by a formwork support with the features of claim 1 and a formwork construction with the features of claim 15 solved. Preferred embodiments are specified in the dependent claims.

According to the invention this is due to at least a first protrusion of the bar element, at least a first Verstärkungsele ^¬ ment to the.

Accordingly, the load-bearing capacity of the formwork support is improved ver ^¬ that the duri in the longitudinal direction of the formwork support dur ^¬ fende first reinforcing element on the inside of the first projection of the web ^¬ Strangements, with which the web element is anchored in the wood material of the first belt element. For purposes of this disclosure, the system of the first gain element at the first projection of the bar element means that the first reinforcing member without the interposition of the wood material of said first chord member ^¬ factory is connected with the first projection of the bar element. Accordingly, the first reinforcing element on the one hand bear directly against the first projection of the web element. On the other hand, different from the wood material of said first chord member intermediate element between the first reinforcing member and the first projection of the bar element can be arranged, whereby the loads can be removed with the aid of the intermediate member from the first reinforcing member in the Stegele ^¬ ment. The first reinforcement member is preferably arranged substantially completely between the surfaces of the first Außenflä ^¬ chord member so that the first Ver ^¬ reinforcing element does not project over one of the outer surfaces of the first chord member. Preferably, the first Ver includes ^¬ reinforcing element also flush with the outer surface of the first chord member from. The arrangement of the first gain element in the correspondingly shaped recess of the first chord member has the advantage that the first reinforcing element angrei ^¬ fenden loads directly, that is removed without the intervention or intermediate layer of the wood material of said first chord member, from the first Ver ^¬ reinforcing element in the web element which is connected on the other side with the second belt element. Preferably, the contact surfaces between the first reinforcing element and the first projection of the bar element in the arranged substantially parallel to the side facing away from the second belt element outer surface of the first belt member, which is loaded in the built- ^¬ operating condition of the formwork support. The loading of the outer surface of the first belt element can be done by placing on a support means, in particular in the form of ceiling supports, by resting on another formwork support or by the load on a resting formwork ^¬ plate. In all cases, the direct connection of the first reinforcing element to the web element can increase the load capacity of the formwork support. For reinforcement or stiffening of the thus provided first chord member, the first Verstär ^¬ effect element is formed from a wood material from the first Gurtele ^¬ ments, in particular softwood, different material. The first reinforcing element is preferably formed of a metal, for example aluminum, a plastic, or a fiber-reinforced plastic. However, the first reinforcement member may alternatively be manufactured from a material different from wood material of said first chord member wood material which is in particular in the direction perpendicular to the resilient outer surface of the first chord member as the wood material of the first Gur ^¬ wick member. For this purpose, the wood material of the first reinforcing element perpendicular to the outer surface of the first Gur ^¬ telement, ie in the loading direction, have arranged wood layers. In particular, the wood material of the first reinforcement elements Ver ^¬ plywood or laminated veneer lumber may be a plurality of layers or plies of the plywood or the laminated veneer wood that are parallel to the main plane of the web element, extending in the loading direction. The first Verstärkungsele ^¬ ment is fi xed ^¬ within the recess of the first chord member. Preferably, an adhesive or glue joint or ei ^¬ ne mechanical connection between the first Verstärkungsele ^¬ ment and the wood material of the first belt member is provided. The adhesive or glue joint may be provided on the side walls of the first reinforcing member, but also on the the web element supplied ^¬ turned inside of the first reinforcing member. In a corresponding way also the first projection of the web element in a correspondingly shaped recess of the ers ^¬ th chord member may be fixed, in particular glued or glued, but also be mechanically connected. The first protrusion is preferably substantially completely located within the first chord member, whereas the corresponding longitudinal side of the bar element on the side facing the second belt member Au ^¬ ßenfläche of the first chord member is applied. For uniform anchoring of the bar element in the first belt element, the first projection extends in the longitudinal direction of the bar element, wherein the first projection projects up from the longitudinal side of the bar element. Preferably, one to three first projections, in particular ^¬ special, two first projections provided. The web element consists of a further wood material, in particular in the form of a multi-layer solid wood panel made of softwood, a flat-pressed plate or a plywood plate. The first Verstär ^¬ effect element in the first belt member contacts the first protrusion of the bar element, preferably over substantially the entire length of the bar element so that a uniform load ^¬ ablation over the length of the formwork support is achieved. With the aid of the first reinforcing element, the tensile strength of the first belt element can be substantially increased. As a result, the carrying capacity for bending moments can be improved. Finally, an increase in the rigidity of the shuttering ^¬ carrier could be detected, whereby the absorption of shear forces could be improved. In extensive tests has also been found that the inventive arrangement of the first reinforcing member significantly increases the bearing resistance of the formwork support.

According to a particularly preferred embodiment, at least one second reinforcing element extending in the longitudinal direction of the second belt element is arranged in a corresponding recess of the second belt element, wherein the at least one second reinforcing element bears against the at least one second projection of the web element. Therefore, in this embodiment, both the belt members are provided with reinforcing elements which are associated with the projections at the two opposite longitudinal sides of the bar element in such a way in connection that a Lastabtra ^¬ supply is achieved from one side of the formwork support to the other side of the formwork support. The second amplification Kung element may be designed according to the first reinforcing element. If, therefore, features and properties of the first reinforcing ^element are described for the purposes of this disclosure, they can equally be implemented in the first and / or in the second reinforcing element. In this embodiment, advantageously, an effective load transfer from the first reinforcing member in the first chord member across the web member to the second Verstärkungsele ^¬ ment can be accomplished in the second chord member. As a result, in particular the bearing of the formwork support on a support means can be made particularly stable. In the case of egg ^slab formwork, the loads in the assembled operating state of the formwork support can be reliably transmitted in the vertical direction from one longitudinal side of the formwork support to the other longitudinal side of the formwork support. Over it ^¬ out of the formwork support can also be used in a wall formwork.

To derive the effective in use of the formwork carrier loads in a formwork support overlapping support device, it is advantageous if the first reinforcing element between the first projection of the web member and the second belt element facing away from the outer surface of the first belt member and the at least ^¬ a second reinforcing element between the second projection of the rod member and the abge ^¬ from the first belt member outer surface of the second belt member is extended. In this embodiment, the reinforcing elements in the materiality ^¬ union are flush with the outer surfaces of the belt members. Preferably, the first reinforcing member has a load receiving surface substantially in the plane of the outer surface of the first belt member, and the second reinforcing member has a load discharging surface substantially in the plane of the outer surface of the second belt member. In the installed state of the formwork support the outer surface of the first chord member high operating loads is exposed, which are received from the first reinforcing member at the Au ^¬ ßenfläche of the first chord member, and transferred directly to the web member from which a UNMIT ^¬ nent load transfer via the second gain element Outside surface of the second belt element takes place. The Außenflä ^¬ surface of the second chord member may be supported on a support means, so that the introduced from the outer surface of the first belt member loads can be removed via the second gain ^¬ element in the support means. This embodiment has the particular advantage that press-fit in the wood material of the formwork support due to the Auflagerung on the (usually made of metal) support means can be avoided. Thereby, the reusability of the formwork support can be improved, whereby cost savings can be achieved. In addition, the use of resources can be minimized.

For reinforcement of the formwork support, it is favorable when a cross-section in particular rectangular or trapezoidal-shaped hollow profile member is provided as a first reinforcing member which has a protrusion on the first of the bar element on ^¬ lying bottom wall. When the second belt member has a second reinforcement member, it may be also formed as a hollow profile element, which is preferably in the We ^¬ sentlichen identical to the first reinforcing member. The hollow profile element extends within the recess of the first belt element in its longitudinal direction. The cross section of the hollow profile element is preferably constant in the longitudinal direction of the first belt element. The hollow profile element has on the inside a bottom wall which is supported on the associated projection of the bar element. If the web element before ^¬ cracks comprises a plurality of, preferably, all of the projections

Stegelements in contact with the bottom wall of the Hohlprofilele ^¬ ment. As a result, the power transmission between the first and second belt element and the web element can be maximized. In addition, the hollow profile element has two longitudinal side walls and an outer wall, which close a cavity ^¬ . The outer wall is preferably arranged substantially in the plane of the outer surface of the associated belt element, wherein operating loads can be absorbed or discharged via the outer wall of the hollow profile element. The hollow profile element is characterized by a high rigidity with low weight on. Moreover, the hollow profile element has a central cavity into which terminal elements, in particular buildin ^¬ actuating elements, can be accommodated.

In order to attach fasteners to the reinforcing element, it is further advantageous if the hollow profile element has at least one holding opening for arranging a Befestigungsele ^¬ ment, wherein the holding opening of the hollow profile element preferably in the longitudinal direction of the first Gurtelements, in particular in the plane of the outer surface of the first Gurtelements, he stretched ^¬. The fastening elements can be used for example for fixing the formwork support to a support device. As a result, for example, a tilt protection of the formwork beams can be achieved, whereby the operation can be made safer. In the case of using the formwork support in wall formwork, the hollow profile element can be used with the holding opening for connection to a steel wall bolt. The embodiment as a hollow profile element with Halteöff ^¬ tion has the particular advantage that the connection of Sys ^¬ temkomponenten in a particularly simple manner, without damaging the formwork support, as in drilling, can be made. In addition, the connection between the formwork support, and the system component, for example a Stützele ^¬ ment, particularly stable.

According to a further preferred embodiment, the hollow profile element has a retaining opening extending substantially in the plane of the outer surface of the first belt element, the hollow profile element having a gutter, in particular with a further retaining opening, between the outer surface of the first belt element and the bottom wall of the hollow profile element. In this embodiment, the retaining opening in the plane of the outer surface of the belt member preferably has a larger extension than the Längser ^¬ further retaining opening in the gutter.

According to a further preferred embodiment, the hollow profile element is trapezoidal in cross-section, wherein the extension of the trapezoidal hollow profile element perpendicular to the main plane of the rod element on the side of the first projection of the web element ^¬ shorter than on the side of the second belt element abgewand ^¬ th outer surface of the first belt element. In this Ausfüh ^¬ tion therefore increases the extension of the hollow profile element senk ^¬ right to the main plane of the web element, ie its width, from the bottom wall to the outer wall. This embodiment has the Prior ^¬ part, that the hollow profile element can accommodate fasteners of a given before ^¬, in particular the normalized width, while the bottom wall of the hollow profile member is substantially the ^¬ same width as the contact surface of the projection (or ge ^¬ entire width a plurality of protrusions, including the Zwischenräu ^¬ me between the projections) may have.

According to a further preferred embodiment is provided at least an intermediate member between the first reinforcing member and the first protrusion which the first pre ^¬ having on side of the first reinforcement member a greater extent perpendicular to the main plane of the web element as a page jump of the bar element. Accordingly, the intermediate member is tapered on the applied to the reinforcement member Au ^¬ ßenseite in the direction of the projection resting against the inside. As a result, a continuous transition between the reinforcing element and the at least one projection of the bar element can be created if the reinforcing element, in particular due to standards, should have a greater width than the at least one projection on the bar element. Preferably, the intermediate element on the inside substantially the same pulp ^¬ te as the first projection of the bar element at the free end. In the case of plural projections, the intermediate element on the inner side in ^¬ preferably substantially the same width as the plurality of protrusions, including the spaces between the projections together. In an alternative embodiment, a plurality of intermediate elements are provided, wherein each an intermediate element bears against a projection of the web element. Of course, intermediate elements may be provided on both belt elements of the formwork support. The intermediate element is designed such that the load transfer is imparted by the first reinforcing element into the web element. In a preferred embodiment, the intermediate element is designed as a separate construction ^¬ part, in particular of metal or plastic, wel ^¬ ches between the first reinforcing element and the first projection of the rod element is arranged. Alternatively, the interim ^¬ rule element can be integral with the first reinforcing member ver ^¬ prevented. Furthermore, a Klebeverbin ^¬ dung may be provided between the first reinforcing member and the first projection of the web element as an intermediate element. In this embodiment, a preferably in cross-section from the outside to the inside converging, in particular trapezoidal, free space between the first reinforcing element and the first projection of Stegele ^¬ ment is provided, which is filled with adhesive. All embodiments of the formwork support with the intermediate element Zvi ^¬ rule the first gain element and the web element bring about the advantage that the first reinforcement member with egg ^¬ ner substantially constant width can be formed between the outer and inner sides. As a result, the first reinforcing element can be anchored more stably in the first belt element than in a wedge-shaped embodiment of the first reinforcing element. In addition, a gap formation between the first reinforcing member and the adjacent portions of the first belt member can be avoided.

To achieve the rejuvenation of the intermediate element between the gain and the projection, it is favorable when the interim ^¬ rule element in cross section is trapezoidal. Depending on the design, several trapezoidal intermediate elements, in particular each a trapezoidal intermediate element per projection of Stegele ^¬ ments may be provided.

According to a further preferred embodiment, the first reinforcing element is a cross-sectionally full insert element, wel ^¬ ches preferably made of metal, in particular aluminum, art ^¬ fabric, fiber reinforced plastic or a different wood material of the first belt element wood material, especially hardwood, plywood or veneer plywood , The different from the wood material of said first chord member inserts is ^¬ lement aufgenom- in the recess of the first chord member men, wherein the material of the insert element has a higher Tragfä ^¬ ability or rigidity than the first wood material of the first belt member. Preference is in each case at least one ^¬ A set element in the first and provided in the second chord member see ^¬. In some cases, however, only one of the belt elements may be provided with a reinforcing element. If the inserts shall ^¬ lement have a greater width than the first protrusion of the Stegele ^¬ ments, an intermediate element between the inside of the insert member and the free end of the f ^¬ th projection of the web element is preferably provided. The execution of the first gain element as a cross-section full inserts ^¬ lement involves in particular the advantage that Ansammlun ^¬ of dirt be avoided on the first chord member. Furthermore, it is advantageous that the first reinforcing element in this embodiment has a high deformation resistance. This is particularly advantageous if the formwork beam bounces hard on the ground when dismantling the formwork. Furthermore, is favorable that the first reinforcement member is arranged for a Lastabtra ^¬ supply over its entire width.

For transmitting force between the gain and the web member have the full cross-sectional insert member and the ers ^¬ te protrusion of the bar element on the side of contact surfaces between the insert element and the first projection is preferably substantially the same extent perpendicular to the main plane of the bar element on. Accordingly, the insert member is vollflä ^¬ chig on to the at least one projection of the bar element. In case of several projections the width of the Einsatzele ^¬ ments preferably corresponds to the width of the plurality of protrusions, including the spaces between the projections.

According to a preferred variant of this embodiment is provided as an insert element arranged substantially parallel to the main plane of the rod member reinforcing plate, in particular a flat profile made of metal, preferably made of aluminum, preferably at least two reinforcing plates bear against a corresponding number of first protrusions of the rod element. In this embodiment, the recess of the Gurtele- formed slit-shaped element, wherein the reinforcing plate in the slot-shaped recess of the belt member befits ^¬ taken, in particular glued, is. In an embodiment of the Scha ^¬ ment carrier with at least two flat profiles is advantageous that the portion between the two flat profiles can be used for driving nails.

To reinforce the formwork support over its Längserstre ^¬ ckung is provided according to a first preferred embodiment that extends the first reinforcing element substantially over the entire length of the first belt member.

Alternatively, a plurality of first reinforcing members may be spaced apart in the longitudinal direction of the first chord member ^¬. In this embodiment, instead of a continuous reinforcing element in the first and second belt element, individual first or second reinforcing elements are provided, with free sections of the formwork support extending therebetween from the first and second reinforcing elements.

The invention will be explained below with reference to preferred embodiments shown in the drawings, to which, however, it should not be limited. In the drawing ^¬ planning shows:

1a is a perspective view of a formwork construction with several formwork beams according to the invention in the form of yoke and cross beams, which are supported on one side on a support means and on the other side formwork panels carry;

Fig lb shows a detail view of the highlighted in Figure la De ^¬ tails..;

FIG. 2 is a perspective view of the formwork support shown in FIG. 1; FIG.

3 is a perspective view of a portion of the damage lung carrier according to FIG. 2;

4 shows a further view of the formwork support according to FIGS. 1 to 3;

5 is a perspective view of another erfindungsge ^¬ MAESSEN formwork support.

6 is a perspective view of a detail of the Scha ^¬ ment carrier according to FIG. 5.

7 shows a further view of the formwork support according to FIGS. 5, 6;

Figure 8 is a perspective view of a section of a white ^¬ direct formwork support according to the invention.

FIG. 9 shows a further view of the formwork support according to FIG. 8; FIG.

10 is a perspective view of a detail of a white ^¬ form inventive formwork support;

FIG. 11 shows a further view of the formwork support according to FIG. 10; FIG.

12 is a perspective view of another erfindungsge ^¬ mäßen formwork support;

13 is a perspective view of a detail of the Scha ^¬ ment carrier according to FIG. 5.

14 shows a further view of the formwork support according to FIGS. 12, 13;

Fig. 15 is a perspective view of a section of a fur ^¬ direct formwork support according to the invention;

FIG. 16 shows a further view of the formwork support according to FIG. 15; FIG. 17 is a perspective view of a detail of a white ^¬ form inventive formwork support.

FIG. 18 shows a further view of the formwork support according to FIG. 17; FIG.

Figure 19 is a perspective view of a section of a white ^¬ direct formwork support according to the invention.

FIG. 20 shows a further view of the formwork support according to FIG. 19; FIG.

Figure 21 is a perspective view of a section of a white ^¬ direct formwork support according to the invention.

FIG. 22 shows a further view of the formwork support according to FIG. 21; FIG.

Figure 23 is a perspective view of a section of a white ^¬ direct formwork support according to the invention. and

FIG. 24 shows a further view of the formwork support according to FIG. 23. FIG.

In Fig. 1, a formwork construction 1 is shown, which is set up in the embodiment shown for producing a ceiling. The formwork construction 1 has several Stützenele ^¬ elements 2, which are supported on the ground. On the supports ^¬ elements 2 similar formwork supports 3 are superimposed, with which further, running transversely thereto formwork supports 3 abge ^{¬ are} supported. The formwork beams 3 on the support elements 2 are referred to as Jochträger, the transverse formwork 3 as a cross member. On the top of the cross member forming formwork 3 formwork panels 4 are arranged. The formwork construction 1 is known per se from the prior art, so that more detailed explanations can be dispensed with. When installed, the formwork supports 3 are loaded perpendicular to its longitudinal direction 5 (shown in FIG. 2).

As shown in Fig. La, lb, cf. 2ff, ersicht ^¬ lich, each formwork support 3 has a longitudinal direction 5 Stretched first belt element 6 consisting of a wood material and a longitudinally 5 extended second belt element 7 be ^¬ standing from a wood material. The first belt element 6 and the second belt element 7 are connected to one another via a web element 8 which is extended in the longitudinal direction 5 and which is formed from a further wood material. The web element 8 is formed plate-shaped, wherein the main plane of the web element 8 is substantially perpendicular to the main plane of the first 6 and second belt element 7. In the case of the shown Deckenscha ^¬ ment, the web element 8 is therefore directed vertically out ^¬ in the installed state. The first 6 and second chord member 7 have a large ^¬ ßere width, ie the dimension perpendicular to the main plane

Stegelements 8, as the web element 8. Accordingly, the formwork supports 3, as usual in the prior art, I-shaped. The first belt member 6 is made of a first wood ^¬ material, the second belt member 7 made of a second woodwork ^¬ material. Preferably, the first 6 and the second belt elements 7 are made of the same wood material, in particular needle ^¬ wood.

As can be seen from FIGS. 2 to 4, the web element 8 has on one longitudinal side at least one first projection or prongs 9, which engages in a corresponding recess of the first belt element 6. In addition, the web element 8 has on the other (opposite) longitudinal side at least one corresponding second projection or prongs 10, which engages in a corresponding recess of the second belt element 7 ^¬ . In the embodiment shown, two first projections 9 and two second projections 10 are provided. The first 9 and second projections 10 ensure a secure anchoring of the bar element 8 in the first 6 and second belt element 7. The first 9 and second projections 10 extend bar-shaped in the longitudinal direction 5 of the formwork carrier 3. In the embodiment shown, the first 9 and second projections 10 tapered in a wedge shape in the direction of the free end.

As shown in Fig. 2 to 4 further be seen, the formwork ^¬ carrier 3 further comprises at least one of the first Gur in the longitudinal direction 5 Telements 6 extended first reinforcing element 11, wel ^¬ Ches is arranged in a correspondingly shaped recess 12 of the first belt member 6. In the embodiment shown, two first reinforcing elements 11 are provided. The first Ver ^¬ reinforcing element 11 extends between the outer surface facing away from the second chord member 7 6 'of the first chord member 6 and the first protrusion 9 of the bar element 9. Thus is the first reinforcing member 11 with the first protrusion 9 of the bar element 8 in contact, whereby a direct load transfer between the outer surface 6 ^{λ of} the first belt member 6 is accomplished via the first reinforcing member 11 in the web element 8.

As further apparent from FIGS. 2 to 4, the formwork ^¬ carrier 3 further comprises at least one erstrecktes in the longitudinal direction 5 of the second chord member 7 second reinforcing member 13, wel ^¬ ches is disposed in a corresponding recess 14 of the second chord member 7. In the embodiment shown, two second reinforcing elements 13 are provided. The second Verstär ^¬ effect element 13 extends between the second projection 10 of the bar element 8 and the outer surface facing away from the first belt member 6 7 'of the second chord member 7, so that the second reinforcement member 13 on one longitudinal side of the second pre ^¬ recess 10 of the bar element 8 contacted and exposed on the other longitudinal side on the outer surface 7 'of the second belt member 7.

As shown in Fig. La, lb can be seen, can in the formwork structure 1 conventional formwork support 3 without amplification ^¬ elements 11, 13, and in Fig. 2 et seq. Shown formwork beam 3 with reinforcing elements 11, 13 are combined. Preferably, the Jochträger the formwork construction 1 by formwork support 3 with reinforcing elements 11, the cross member partly by formwork 3 without reinforcing elements 11, 13, partly by formwork 3 with Verstärkungsele ^¬ ments 11, 13 are formed.

2 to 4, the first 11 and second Verstärkungsele- ment 13 formed by cross-sectionally full insert elements 16. In the embodiment shown, the insert elements 16 have the same width as the free ends of the bar elements 8.

As a result, the insert elements 16 rest against the projections 10 over the whole area. According to FIG. 2 through 4, the insert elements 16 are designed as reinforcing plates, which are arranged substantially parallel to the main plane of the bar element 8, that is, vertically in the case of De ^¬ ckenschalung shown in FIG. La in the installed state. The insert elements 16 are preferably made of metal, in ^¬ particular aluminum, plastic, fiber-reinforced plastic o- a wooden material, in particular plywood or veneer plywood.

In the embodiment of FIGS. 5 to 7, two ^¬ tes reinforcing element are the first 11 and 13 are provided in cross-section rectangular hollow section ^¬ filelemente 17th The hollow profile elements 17 have a voltage applied to the first 9 and second projection 10 of the support member 8 bottom wall 18 of which upstanding, mutually parallel side walls 19 and a substantially in the plane of the outer surface 6 'of the first belt member 6 extended outer ^¬ wall 20 ,

Further, intermediate members 22 are provided between the first reinforcing member 11 and the first protrusions 9 and between the second reinforcing member 13 and the second protrusions 10 of the web member 8, respectively. The intermediate elements 22 are extended in the longitudinal direction 5 of the formwork support 3 and run in each case from the voltage applied to the hollow profile element 17 Au ^¬ ßenseite to the voltage applied to the first 9 and second projections 10 inside together. In the illustrated embodiment 22 have the intermediate elements in cross section trapezoidal From ^¬ cuts. The intermediate elements 22 may also be formed integrally with the first 11 and second reinforcing element 13 (not shown). Furthermore, the intermediate elements 22 may be formed by adhesive bonds, which are set up for a load transfer between the hollow profile elements 17 and the web element 8. This version is used in production Freiräume between the hollow profile elements 17 and the first 9 and second projections 10 of the support member 8 is formed, wel ^¬ che filled with adhesive. In addition, a ^¬ pieces can be combined onnectivity with the hollow profile elements 17 connected intermediate elements 22 with adhesive (not shown).

As seen from Fig. 5, 6, the hollow profile elements 17 have a plurality of longitudinally spaced 5 holding holes 21, to which fastening elements, for example hammer-head screw ^¬ mounted for various connection elements Kgs ^¬ NEN. The holding openings 21 of the hollow profile elements 17 extend in the longitudinal direction 5 of the formwork support 3 in the plane of the outer surface 6 'of the first belt element 6 and in the plane of the outer surface 7' of the second belt element 7.

In the embodiment of FIGS. 8, 9, the holding openings 21 of the hollow profile elements 17 extend essentially over the entire length of the first belt element 6 or of the second belt element 7.

According to FIGS. 8, 9, intermediate elements 22 are likewise provided between the first reinforcing element 11 and the first protrusions 9 or between the second reinforcing element 13 and the second protrusions 10. In the embodiment shown, the intermediate elements 22 are trapezoidal in cross-section.

According to FIGS. 10, 11, two trapezoidal intermediate elements 22 are arranged between the first reinforcing element 11 and the first projections 9. Furthermore, there are two trapezoidal intermediate elements 22 between the second reinforcing element 13 and the second projection 10th

In the embodiment of FIGS. 12 to 14, the first belt element 6 has a plurality of recesses 12 spaced apart from one another in the longitudinal direction 5, in which corresponding first reinforcing elements 11 are arranged. Accordingly, the first Gur ^¬ sliding element 6 in this embodiment of first reinforcement elements 11 free portions which, for example, the same countries ge how the first reinforcing elements 11 may have. The second belt element 7 is constructed in accordance with the first belt element 6, wherein a plurality of second reinforcing elements 13 are arranged in ent ^¬ speaking recesses 14 of the second belt member 6.

According to Fig. 13 to 14, the holding openings 21 extend over the entire length of the first 11 and second reinforcing elements 13. The first 11 and second reinforcing elements 13 are rectangular in cross-section, wherein the width of the bottom wall ^¬ 18 of the first 11 or second reinforcing elements 13 in the illustrated embodiment of the total width of the first 9 or

second projections 10, including the intervening gap corresponds.

In the embodiment of FIGS. 15, 16, the hollow profile elements 17 on the first 6 and second belt element 7 are trapezoidal in cross-section, wherein the bottom wall 18 has a smaller width than the outer wall 20 of the hollow profile element 17. As a result, the hollow profile elements 17 abut the entire surface on the first 9 and second projections 10 of the bar element 8.

In the embodiment of FIGS. 17, 18, the web element 8 has exactly one first projection 9 for engagement in the first belt element 6 and exactly one second projection 10 for engagement in the second belt element 7. First 11 and second Verstär ^¬ effect element 13 rectangular Hohlprofilele ^¬ elements 17 are provided in cross-section, which abut with the bottom walls 18 the full surface of the first 9 and second protrusion 10 degrees. In this embodiment, the hollow profile elements 17 also on the outer walls 20 in the inner cavity projecting flanges 23.

In the embodiment of Fig. 19, 20 3, the formwork support according a first 11 and a second reinforcing member 13, which are formed by full cross-sectional insert elements 16, insbeson ^¬ particular from metal, preferably aluminum. According to FIGS. 19, 20, the insert elements 16 extend over at least two first 9 and second projections 10 of the bar element 8. In addition, the web element 8 is provided in this embodiment on both broad sides with cover layers 24. The cover layers 24 rest against the outer surfaces of the first 6 and second belt element 7 facing one another on the longitudinal side. Depending on the embodiment, the cover layers 24 and the web element 8 may be formed in one or more parts.

In the embodiment of FIGS. 21, 22, the insert elements 16 in the first 6 and second belt element 7 are made of plywood having a plurality of wood plies 25. In the embodiment shown, the wood plies 25 of the plywood insert element 16 are substantially parallel to the main plane of the piling element 8, i. in the installed operating state of the formwork support 3 is substantially vertical. In the embodiment shown, the cover layers 24 bear on the mutually facing outer surfaces of the first 6 and second belt element 7. Alternatively, however, the cover layers 24 may also protrude into the recesses provided in the first 6 and second belt element 7 for the projections 9, 10 (not shown). This is expedient in particular when, during the production of the formwork support 3, the web element 8 already provided with the cover layers 24 is connected to the belt elements 6, 7.

In the embodiment of FIGS. 23, 24, the hollow profile elements 17 between the bottom wall 18 and the outer wall 20 have an intermediate web 26 which is substantially parallel to the bottom wall 18 and to the outer wall 20, respectively. In this exporting ^¬ tion 20, the outer wall has a continuous longitudinal opening 5 stops 21, wherein the intermediate web 26 comprises a plurality of spaced apart in the longitudinal direction ^¬ 5 more retaining openings 27th

Claims

Claims:

1. formwork support (3) with a first belt element (6) of ei ^¬ nem wood material, a second belt element (7) made of a wood ^¬ material and a first belt element (6) with the second belt element (7) connecting web element (8) wherein the Stegele ^¬ element (8) on the one longitudinal side at least one first pre ^¬ jump (9) for connection to the first chord member (6)

and / or on the other longitudinal side at least one second projection (10) for connection to the second belt element (7), and having at least one in the longitudinal direction (5) of the first belt member (6) extending first reinforcing element (11) which in a corresponding recess (12) of the first belt element (6) is arranged, characterized in that the at least one first reinforcing element (11) rests against the at least one first projection (9) of the bar element (8).

Second formwork support (3) according to claim 1, characterized in that at least one in the longitudinal direction (5) of the second belt element

(7) extending second reinforcing element (13) in a ent ^¬ speaking recess (14) of the second belt member (7) is arranged, wherein the at least one second reinforcing element

(13) abuts the at least one second projection (10) of the Stegele ^¬ member (8).

3. formwork support (3) according to claim 1 or 2, characterized in that the first reinforcing element (11) between the first projection (9) of the web member (8) and the second belt member (7) facing away from outer surface (6 ') of the first Gurtele ^¬ ments (6) and the at least one second reinforcing element (13) between the second projection (10) of the web member (8) and the first belt member (6) facing away from outer surface (7 ') of the second belt member (7) extends.

4. formwork support (3) according to one of claims 1 to 3, characterized in that as a first reinforcing element (11) in cross-section in particular rectangular or trapezoidal hollow ^¬ profile element (17) is provided which one on the first Projection (9) of the bar element (8) adjacent bottom wall (18).

5. formwork support (3) according to claim 4, characterized in that the hollow profile element (17) has at least one retaining opening (21) for arranging a fastening element, wherein the holding opening (21) of the hollow profile element (17) preferably in the longitudinal direction (5) of the first Belt element (6), in particular in the plane of the outer surface (6 ') of the first belt element (6), he ^¬ stretches.

6. formwork support (3) according to claim 5, characterized in that the hollow profile element (17) has a substantially in the Ebe ^¬ ne of the outer surface (6 ') of the first belt member (6) extended holding opening (21), wherein the hollow profile element ( 17) ei ^¬ nen gutter (26), in particular with a further Halteöff ^¬ tion (27), between the outer surface (6 ') of the first Gurtelements (6) and the bottom wall (18) of the hollow profile element (17).

7. formwork support (3) according to one of claims 4 to 6, characterized in that the hollow profile element (17) is trapezoidal in cross-section, wherein the extension of the trapezoidal hollow profile element (17) perpendicular to the main plane of the web element

(8) on the side of the first projection (9) of the bar element (8) is shorter than on the side facing away from the second belt element (7) outer surface (6 ') of the first belt element (6).

8. formwork support (3) according to one of claims 1 to 7, characterized in that between the first reinforcing element (11) and the first projection (9) at least one intermediate element (22) is provided which on the side of the first reinforcing ^¬ elements ( 11) has a greater extent perpendicular to the main plane of the web element (8) than on the side of the first projection (10) of the web element (8).

9. formwork support (3) according to claim 8, characterized in that the intermediate element (22) is trapezoidal in cross-section.

10. formwork support (3) according to any one of claims 1 to 9, characterized in that the first reinforcing member (11) is a full cross-sectional insert member (16) which is preferably different from metal, in particular aluminum, plastics, ^{fiber-¬-reinforced} plastic or from the wood material of said first chord member (6) before ^¬ wood material, in particular Foliage ^¬ wood, plywood or laminated veneer lumber, is made.

11. Formwork support (3) according to claim 10, characterized in that the cross-sectionally full insert element (16) and the first projection (9) of the web element (8) on the side of the plant ^¬ surfaces between the insert element (16) and the first projection (9) have substantially the same extent perpendicular to the main plane of the bar element (8).

12. formwork support (3) according to claim 10 or 11, characterized in that as an insert element (16) arranged substantially parallel to the main plane of the rod element reinforcing ^¬ kungsplatte, in particular a flat profile made of metal, preferably ^¬ of aluminum, is provided preferably abut at ^¬ least two reinforcing plates to a corresponding number of first projections (9) of the bar element (8).

13. Formwork support (3) according to any one of claims 1 to 12, characterized in that extending the first reinforcing element (11) substantially over the entire length of the first belt member (6).

14. Formwork support (3) according to one of claims 1 to 12, characterized in that a plurality of first reinforcing elements (11) in the longitudinal direction (5) of the first belt member (6) are spaced from each other.

15. Formwork construction (1), which is set up in particular for the manufacture ^¬ ment of a ceiling, with a plurality of support elements (2) on which formwork supports (3) are superimposed, with which further, transverse thereto extending formwork support (3) are supported on the Upper formwork panels (4) are arranged, characterized in that at least one of the formwork beams is designed according to one of claims 1 to 14