WO2010054491A1

WO2010054491A1 - Prestressed laminated-board wooden beam or finger-jointed wooden beam

Info

Publication number: WO2010054491A1
Application number: PCT/CH2009/000352
Authority: WO
Inventors: Josef Scherer
Original assignee: Josef Scherer
Priority date: 2008-11-17
Filing date: 2009-11-06
Publication date: 2010-05-20
Also published as: CH699945A2

Abstract

The laminated-board wooden beam or finger-jointed wooden beam (2) contains at least one reinforcing strip (1) made of a fibre composite material which is glued in eccentrically on one side and is under tensile stress. Prior to its loading, said beam experiences a deflection as a result of the internal prestress of the reinforcing strip (1). This deflection amounts to 1/1000 to 1/300 of the length L of the beam (2) because the prestressing of the reinforcing strip (1) is higher in the longitudinal centre (7) of the beam than in the end portions of the beam. The production process proceeds in such a way that, for each reinforcing strip to be glued in, a cut for receiving the reinforcing strip (1) is made on the side of the beam which is to be loaded in tension. After this, starting from the longitudinal centre of the beam, each reinforcing strip is solidified with the laminated-board wooden beam or finger-jointed wooden beam by means of pressing in glue via the same parallel portions with the tensile stress decreasing from portion to portion. The production system comprises a device for clamping in reinforcing strips extending upright parallel to one another and for producing a tensile stress of 20 kN to 180 kN over a freely remaining part of at least 4 metres' length.

Description

Prestressed laminated board wood or finger-jointed wood beams

On train claimed wood fibers are due to the growth irregularities, such as knotholes, significantly reduced in strength. For example, according to DIN 1052: 2004 - 08 "Design, calculation and design of timber structures", a characteristic tensile strength of = 18 N / mm ^{2 is} specified for oak wood. 2003 - 05 "Characteristics of wood species" a tensile strength for oak wood of far better 110 N / mm ² . The reduction of 611% of faultless wood to the characteristic value of DIN 1052 was the motivation to reduce the tensile strength of non-impacting elements through a glued-in reinforcement.

For this purpose, for example, on the Biegezugseite of oak beams a reinforcement of high-strength prestressing steel or fiber laminations (CFRP, GFRP or AFK slats) glued in grooves. Due to the reinforcement method, the spread of the load capacity is lower. The example of oak wood beams shows that further refinement is also possible with hardwoods and is even more effective compared to softwoods due to the higher firmness of hardwoods. An additional reinforcement on the bending pressure side is possible, but the effort compared to the quality increase to be achieved is relatively high. At various institutes experiments were carried out on Hoizträgern with different reinforcement in terms of leadership, the form or the material. The reinforcing materials steel, glass fibers (GRP), aramid fibers (AFK) and carbon fibers (CFRP) were glued in most cases with an epoxy resin adhesive. For example, CFRP lamellae are glued flat to the underside of laminated wood beams or glued-on wood beams. Layer board Hplz carrier (SBH carrier) form a laminate of several glued together continuous boards, each about 2 to 4 cm board thickness. You use several, up to 10 layers of boards. Since natural wood is always available in limited lengths of 3-5 m, beams are produced, for example, in a length of 8 m on the other hand also by finger-jointing. When a finger jointing is a longitudinal connection for extending moldings or frame timbers. The profile strips or frame timbers are milled with a special milling tool, the finger joint cutter, at their ends. The resulting wedge-shaped prongs of a workpiece engage in the same profile of the subsequent workpiece. With a careful production, gluing and pressing the bumps a very durable longitudinal connection is produced. Individual bars produced in this way are then glued together to form a so-called wedge-galvanized wood carrier (KVH carrier). The bumps are in the glued single beam over the length of the KVH wearer consciously at different points. CFRP blades are then glued flat to the underside of these KVH beams to increase its load capacity.

In order to meet the requirements of fire protection, in addition, a lower wooden slat is glued to the reinforcement. Both variants led to a load capacity and stiffness increase with a high residual load capacity compared to the non-reinforced beams. Critical to judge is the early time of rupture in the wood cross section above the reinforcement layer and as a result, a significant increase in deformation. Also prestressed reinforcements are already used. The load-bearing capacity increased by another 10% compared to the limp-reinforced wooden girders become. However, if the preload is too great, the reinforcing tapes always break in the end sections of the supports. This tearing previously formed an upper limit for the maximum allowable bias of the gain band.

To overcome this limit and to provide an even better reinforcement, which allows to use such biased SBH or KVH beams in buildings that can carry increased loads permanently and without fatigue, it is the object of the present invention, to provide such improved glued SBH and KVH beams with at least one one-sided eccentric bias. At the same time it is the object of the invention to provide a method for producing such improved SBH and KVH carriers, as well as a manufacturing plant for efficient production of these prestressed SBH and KVH carriers.

This object is firstly achieved by a glued laminated wood or Keilzinkholz carrier (SBH or KVH carrier) with at least one eccentrically glued on one side, under tension reinforcing band made of a fiber composite material, which is characterized in that the SBH or KVH- Carrier has a deflection due to the internal prestressing of the reinforcing band in a range between 1/1000 and 1/100 of the length of the SBH or KVH carrier before its load during its installation, and that the prestressing of the at least one reinforcing band in the carrier Longitudinal center is higher than its bias in the SBH or KVH carrier end sections.

Furthermore, the object is achieved by a method for producing a glued laminated wood or Keilzinkholz carrier (SBH or KVH carrier) with at least one glued-in reinforcing tape, which is characterized in that on the train to be loaded on the side of the SBH or KVH- carrier for each einzuklebende reinforcing tape a section for receiving the einzuklebenden reinforcing tape is introduced and thereafter from the longitudinal center of the SBH or KVH carrier from each reinforcing tape simultaneously on the same parallel sections with from section to section degressive decreasing tension is solidified by means of adhesive with the SBH or KVH carrier.

Finally, the object is achieved by a production facility for carrying out the method, consisting of a device for clamping one or more standing mutually parallel reinforcing bands and for generating any same tensile force of 2OkN to 18OkN per reinforcing band on both sides of the clamping A device for gripping and moving an SBH or KVH carrier and for driving over the tensioned reinforcing bands with such, provided with at least one slot slot SBH or KVH carrier on a free portion of at least 3 meters in length of the reinforcing bands in the direction transverse to the prestressed reinforcing bands.

In the following the invention will be described and explained with reference to drawings and their advantages will be explained.

It shows:

Figure 1: An SBH carrier with reinforcing tape;

Figure 2: A KVH carrier with reinforcing tape;

FIG. 3 shows an SBH or KVH carrier with a torn-off amplification band due to too high a bias voltage, for the sake of plausibility in an exaggerated representation of the tears;

Figure 4: An SBH or KVH carrier with a single degressively prestressed reinforcing strip according to the invention, for the

Plausibility in exaggerated representation of the curvature shown as a result of bias, in a perspective view; Figure 5: a SBH or KVH carrier with three degressively biased, mutually parallel reinforcing bands according to the invention, in a perspective view;

FIG. 6 shows an SBH or KVH carrier with a degressively prestressed reinforcing band, in which the pretensioning force covers a possible bending moment in the SBH or KVH carrier;

Figure 7: A production plant for the production of SBH or KVZ carriers with two degressive prestressed reinforcing bands.

First, the structure of a layer board wood carrier (SBH carrier) 2 is shown in Figure 1. It consists of a plurality of layers of wooden boards 14, which are glued together and pressed together, so that a laminate is formed, which greatly increases the strength of such a carrier. In this case, 2 to 10 layers of such boards 14 are used, each with a thickness of 2 to 4 cm. On the lower side of the beam, a milling cut 3 was introduced, in which a reinforcing tape 1 was glued.

In Figure 2, the structure of a finger-jointed timber support (KVH carrier) 2 is shown. It consists of a plurality of beam sections 15, which were first glued with their front sides. The end faces were prepared by wedge-shaped milled cut 16 for the gluing, hence the name wedge-zinc-wood carrier (KVH carrier). Beams of a plurality of such glued to the joints bar sections are then placed on each other in several layers and glued together and pressed together, so that a laminate is formed, which greatly increases the strength of such a carrier. Several layers of such composite beam sections are used. Depending on the number of layers one speaks of mono, duo, trio or multiblock profiles. On the lower side of the beam, a milling cut 3 was introduced, in which a reinforcing tape 1 was glued.

In Figure 3 is shown for better understanding, first, what in the extreme case happens when the bias of the glued reinforcing tape 1 exceeds the maximum allowable mass. This SBH or KVH carrier 2 here contains a single reinforcing band 1 of very high bias voltage. The SBH or KVH carrier 2 was provided with a longitudinal milling cut 3, which is only slightly wider than the thickness of the reinforcing strip 1. Such a milling cut 3 has approximately a width of 1-8 mm, and a depth of at least 10 mm and a maximum of 100 mm. Therefore, the reinforcing tapes coming into this milling cut 3 pass through several wooden board plies. The reinforcing tape 1 should just just fit into the milling cut 3, so neither pinch nor loosely lie in it. The beam or SBH or KVH beam 2 was driven or slipped over its milling cut 3 over the prestressed reinforcing tape 1. Then, the gap between the reinforcing tape 1 and the milling cut 3 was pressed on both sides with an adhesive, for example, epoxy resin 4. Subsequently, the curing of the adhesive 4 under heat, whereby an intimate and extremely strong connection with the surrounding wood 5 was formed. All this was done under constant and constant bias of the reinforcing strip 1, which remained clamped with its two ends traction in a suitable device. Once the curing of the adhesive 4 is completed and the reinforcing tape 1 is potted accordingly, the bias of the reinforcing tape 1 can be solved. The bias of the reinforcing strip 1 now has an effect on the SBH or KVH carrier 2. The reinforcing tape 1 would like to contract very slightly inside the SBH or KVH carrier 2, but can not do so because of the non-positive encapsulation with the adhesive and the SBH or KVH carrier 2. It is the SBH or KVH carrier 2, which finally gives way. He first follows the slight contraction of the reinforcing tape 1 and because this is mounted only eccentrically, ie only on one of the long sides of the SBH or KVH support 2, this curves concavely around its side 6 with the in-lying reinforcement band 1. If the Reinforcement band 1 even slightly contracted, yet this contraction takes place uniformly over its entire length. It is clear that the contraction is at its absolute maximum at the end regions of the SBH or KVH carrier 2. There the Δx of the Length contraction largest out. The consequence of this is that, when the limit value for a prestressing force which can barely be compensated by the SBH or KVH carrier 2, this enters the end regions of the glued-in reinforcing strip 1. It is not the adhesive connection from the reinforcing tape 1 to the adjacent wood 5 of the milling cut 3, which fails, but it is the wood structure, which adjoins directly to the trimming cut 3, or behind the side wall of the trimming cut 3 connects. They or their fibers are torn, which occurs at failure with a loud bang. Thereafter, this tear-10 extends at a 5m long SBH or KVH beam 2 on both sides by about one meter. In the figure 1 can be seen in a somewhat exaggerated presentation of the effects. While the SBH or KVH carrier 2 remains undamaged in a central region 7 and still acts in its interior the prestressed reinforcing strip 1 and forces it into a curvature as a result of the acting bias, the SBH or KVH carrier 2 runs at its ends in tangential sections 8 to the curvature, because in the end regions, the bias of the reinforcing strip 1 no longer acts. The reinforcing strip 1 is there separated from the composite with the SBH or KVH carrier 2 because of the described tear. Its bias is no longer transferred to the SBH or KVH carrier 2. As a result, the SBH or KVH carrier 2 is no longer loadable over its entire length, but only over those inner region 7, in which the reinforcing tape 1 is still in an intact frictional connection with the milling cut 3.

The invention proceeds from this starting position one step further and creates a SBH or KVH carrier 2 of equal length and in the central region 7 equal or even higher bias voltage of the reinforcing strip 1, while avoiding a tearing of the reinforcing strip 1 in the End portions of the SBH or KVH carrier 2, as shown in Figure 4. The key to this lies in the introduction of a degressive bias, starting from the longitudinal center or the central region 7 of the SBH or KVH carrier 2, where a maximum bias is allowed, which can easily be considerably larger than a previous constant bias over the entire SBH or KVH carrier length. For this purpose, the reinforcing tape 1 is first biased to a maximum value, for example, up to 18OkN clamping force. Afterwards, the SBH or KVH carrier 2 with its milling cut 3 is put over this prestressed reinforcing band 1. Such a milling cut 3 has approximately a width of 1-8 mm, and a depth of at least 10 mm and a maximum of 100 mm. Therefore, the reinforcing tapes coming into this milling cut 3 pass through several wooden board plies. However, now only a central region 7 of the milling cut 3 is encapsulated around the longitudinal center of the SBH or KVH carrier 2 with adhesive, for example with epoxy resin. For this purpose, the adhesive is pressed into the milling cut 3 on both sides of the reinforcing strip 1. Thereafter, this central region 7 of the milling cut 3 is exposed to the longitudinal center of the SBH or KVH carrier 2 of a heat source, for example blown with a hot air blower, which leads to more rapid curing of the adhesive in this area. This middle or central section 7 around the longitudinal center of a 5 m long SBH or KVH carrier 2 may be, for example, 1 m in length. After completion of the curing of the still standing under maximum bias reinforcing tape 1 whose bias is reduced, for example, by a third. In the central region 7 but still acts as the maximum bias of now positively connected to the SBH or KVH carrier 2 reinforcing strip 1. The on both sides of this central portion 7 subsequent sections 8 of, for example, each a further meter are again with adhesive pressed out and then the adhesive in these sections 8 is also brought to heat under heat. Thereafter, the bias of the still clamped reinforcing tape 1 is again reduced by one-third and the remaining at both longitudinal ends of the SBH or KVH support 2 each 1 meter sections 9 of the milling cut 3 are now cured. If, after completion of this introduced over several sections 7,8,9 degressive bias of the reinforcing strip 1 this is released from its voltage, so now affects the bias of the reinforcing strip 1 via different sections 7,8,9 of the SBH or KVH support 2 different strength. While around the longitudinal center 7 of the SBH or KVH carrier 2 a maximum, much higher Voltage prevails as it would be possible with a constant over the entire length of the SBH or KVH carrier 2 bias, against the ends of the SBH or KVH carrier 2 toward a significantly reduced bias. Overall, however, the SBH or KVH carrier 2 curves concavely about the prestressed side, to a fairly uniform degree. In the central region 7, a large clamping force acts with a small length contraction Δx, while in the end regions 9 of the SBH or KVH carrier 2 a small clamping force acts, and therefore with a comparable length contraction Δx. Neither in the central region 7 of the SBH or KVH carrier 2 nor at its ends 9 is therefore tearing observed. In the limiting case, this would have to be used at the same time with well-considered and ideally continuous degression of the prestressing over the entire length of the SBH or KVH carrier 2. The sectionally reduced preload is much closer to this ideal than a consistently constant preload. After all, it turns out that only with such a declining bias a curvature of the SBH or KVH support 2 can be achieved, which reaches at least L / 300. With reference to a 6 meter long SBH or KVH beam 2, this means a curvature in the middle of 2cm = 600cm / 300. If the SBH or KVH carrier is loaded as intended following its installation, the curvature is canceled and the SBH or KVH carrier 2 becomes straight and remains fatigue-free in this state, no matter how long the load lasts. However, this property allows the construction of SBH or KVH carriers conventional dimensions of an increased load, or in accordance with existing loads according to the use of smaller sized SBH or KVH carriers.

FIG. 5 shows a further variant of such a SBH or KVH carrier 2 reinforced with degressively prestressed reinforcing bands, in a perspective representation. The three reinforcing tapes 1 are here standing parallel to each other along the underside of the beam. There were three mutually parallel milling cuts 3 in the bottom of the beam or SBH or KVH support 2 introduced and thereafter, the same with these three milling cuts 3 over three standing and parallel to each other extending, equally strong biased reinforcing bands 1 inverted, either from above or from below. Subsequently, the adhesive was pressed into the three milling cuts 3, first in the central region 7, and subsequently the curing of the adhesive took place by the action of heat in the central region until the curing of the adhesive in this central section 7 had been completed. Then, the bias of the three reinforcing tapes 1 was simultaneously and uniformly reduced, and the portions 8 adjoining the central portion 7 on both sides were filled with adhesive, and this was cured by the action of heat. This can be done at the same time for these two sections 8, or a section 8 after another, that is, the heat source is first recognized at one section 8 and after curing of the same at the other section 8. It is important to maintain the same bias of the reinforcing bands 1 for these two sections 8. Only when both are completely cured, the bias of the reinforcing bands 1 is again reduced and the next following sections 9 of the reinforcing bands 1 are shed in the milling cuts 3 with adhesive. The process is continued in this manner until the end portions 9 of the SBH or KVH carrier are encapsulated with the reinforcing tapes 1 and the adhesive is cured there as well. Only then, the bias of the reinforcing bands 1 is released, so that the inner bias of the same now also affects the two end portions 9 of the SBH or KVH carrier 2. Under this degressive bias, a layered wood support 2 of length L reinforced in this manner will suffer a curvature of approximately L / 300, as shown in FIG. As a result of the later intended loading of the SBH or KVH carrier 2, this curvature is canceled again and the SBH or KVH carrier 2 remains fatigue-free.

FIG. 6 shows a SBH or KVH carrier 3 with a degressively prestressed reinforcing band 1 with zones of different inner tensile elongation at break. In this case, the bending moment 15 is shown, which adjusts itself with a uniform external load. Logically, in the middle, the beam bends the most. Over the length of the carrier 2 has the inner reinforcing band has different biases. In the central area as given here, for example, a bias of 12 tons, then to this area then on both sides per 8 tons and in the outer end of each 4 tons. Instead of achieving a degressive bias by curing a uniform adhesive in sections, a degressive bias or such Gradientenverankerung can be achieved by an adhesive variation by using different adhesives for different sections. The simplest, and in most cases completely adequate, is to work with just two gradient levels. In the middle of the carrier, a high and in the outer regions of the carrier a reduced bias voltage is generated. While an epoxy adhesive with a high tensile elasticity modulus of 3-5'OOON / mm ^{2 is} used in the middle of the support, the bonding is carried out at the end of the support with a PU adhesive. The PU adhesive has an E-modulus of approx. 200-1 OOON / mm ² . The milled or milled grooves are therefore filled in the central area with epoxy adhesive, and in the outer areas with a PU adhesive to bond the uniformly prestressed reinforcing tapes with the Schichbrettholz carrier. If the reinforcing band is then relaxed, it can contract slightly into the end region in the PU adhesive there because of its lower rigidity, and this tension is not transferred to the end regions in a hard manner. PU adhesive has only about 10% of the stiffness of an epoxy adhesive, and therefore so the glued in tension element can release tension. The degree of preload is therefore reduced in the end regions, so that tearing is avoided - and a gradient anchorage thus arises by itself.

A very special construction of a SBH or KVH carrier is shown in FIG. 7, as well as the associated torque curve of such a three-field carrier. A three-field beam can namely be biased over the supports and in the field in different directions. In the example shown, the three-field carrier is composed of 3 carrier sections of 12 lengths each to a total length of 36 m. It consists of a total of 5 wooden components, which are coupled together on site, ie at the construction site. The crosspoints are set so that they are each in the range of a moment zero. Under these circumstances, a preload in the support and in the field areas is possible. The prestressed wooden girders are prepared accordingly so that the bias is placed on the underside of the box when the individual girders are moved in the field and on the top above the girder.

FIG. 8 shows a production plant for the production of laminated wood beams glued or reinforced according to the invention. The system includes a tensioning device for clamping one or more reinforcing straps so that they extend parallel to each other and their lateral edges each extend in a plane perpendicular to the belt plane. The tension may be created so that the straps are stationarily clamped on one side, or held there, by being wrapped around an end anchor plate 11 so as to create a self-clamping action thereon. The opposite discs 12 are rotatable by means of, for example, a hydraulic or a mechanical drive with high reduction. The two drive pulleys 12 are preferably of the same diameter, so that identical tensile forces are generated with the same drives. It is important that all parallel clamped reinforcing bands 1 have exactly the same preload. If one or as shown in the example two reinforcing tapes 1 are clamped with the same bias, can be driven over the reinforcing bands 1 with the laminated board wood carrier or keilverzinkte wooden support 2, which has prepared milling cuts 3. For this purpose, the laminated wood support or wedge-galvanized wood support is carried by a hoist 13 and slowly lifted from bottom to top, so that the reinforcing tapes 1 come to lie in the milling cuts 3. Thereafter, adhesive is first pressed into the milling cuts 3 in the central region 7 and brought to harden by the action of heat. Then the bias voltage is reduced by a predefined measure. Nevertheless, that. this bias reduction is made only on one side of the tensioning device, it naturally acts on both sides of the hardened central region 7 of the reinforcing bands. Now the milling cuts 3 following the central area 7 are pressed in the areas 8 with adhesive. Once this adhesive has cured, the bias is further reduced in the same way and the bonding of the reinforcing tapes in the milling cuts 3 in the end sections 9 can be made. As soon as there, too, the adhesive is completely cured by the action of heat, the bias can be completely canceled, causing the laminated wood support easily curved like an arch bridge upwards, but with a constant radius of curvature. The reinforcing tapes are cut off at the two ends of the laminated wood beam and it is then ready for installation in a building. In the simplified case, when working with different adhesives, eliminates the step by step reduction of the bias. The reinforcing tape or tapes are bonded to the substrate with the same amount of bias but with different adhesives, for example in the central area with epoxy and then, towards the ends, with a PU adhesive. Thus, when releasing the bias, a gradient anchoring automatically occurs because the PU adhesive is more yielding. Such a prestressed carrier has a compressive stress of 4-10 N / mm ² in the unobstructed and therefore unloaded state on the pressure-stressed side in the wood, and contains at least one reinforcing tape 1 with a prestressing force of a minimum of 2OkN and a maximum of 18OkN.

Performed experiments have already shown that thanks to the indicated bias the load of a SBH or KVH carrier can be practically doubled, since the pre-strain of the allowable additional elongation under the load corresponds.

Claims

claims

1. Glued SBH or KVH carrier (2) with at least one eccentric glued on one side, standing under tension reinforcing strip (1) made of a fiber composite material, characterized in that the SBH carrier (2) before its load in the course of its installation, a deflection due to the internal pretension of the reinforcing strip (1) in a range between 1/1000 and 1/100 of the length of the SBH or KVH

Carrier (2), and that the bias of the at least one reinforcing strip (1) in the carrier longitudinal center is higher than the bias in the SBH carrier end portions.

2. Glued SBH or KVH carrier (2) according to claim 1, characterized in that the SBH carrier (2) before its loading during its installation a deflection due to the internal bias of the reinforcing strip (1) in a range between 1 / 1000 and 1/100 of the length of the SBH or KVH carrier (2), and that the bias of the at least one reinforcing tape (1) in the carrier longitudinal center is higher than its bias in the SBH carrier end portions, by the at least one reinforcing tape (1) is bonded in the central portion with epoxy resin and outside the central region with an adhesive of lower rigidity.

3. Glued SBH or KVH carrier (2) according to any one of the preceding claims, characterized in that the at least one reinforcing strip (1) made of glass fibers (GRP), Aramidfasem (AFK) or carbon fibers (CFRP) or a combination consists of these fibers, and by means of an adhesive, for example an epoxy adhesive in a specially for this reinforcing band (1) recessed cut (3) on the train to be loaded by side of the SBH or KVH carrier (2) is glued.

4. Glued SBH or KVH carrier (2) according to one of the preceding claims, characterized in that it has a compressive stress of 4-10 N / mm ² in the unassembled and therefore unloaded state on the pressure-loaded side in the wood (5), and at least one

Reinforcing belt (1) with a biasing force of minimum 2OkN and a maximum of 18OkN contains.

5. Glued SBH or KVH carrier (2) according to one of the preceding claims, characterized in that the at least one

Reinforced band (1) made of fiber composite material on the claimed on train or on the bending-claimed side of the SBH or KVH carrier (2) in an introduced on that side cutting section (3) in the wood of the width of 1-8mm and a depth of at least 10mm and at most 100mm in the same is glued.

6. Glued SBH or KVH carrier (2) according to one of the preceding claims, characterized in that the at least one reinforcing strip (1) made of fiber composite material passes through several wooden board layers of the SBH or KVH carrier (H1 / H2 / H3).

7. Glued SBH or KVH carrier (2) according to one of the preceding claims, characterized in that it consists of several sections with successively a bias in opposite directions, and the end faces of the sections are coupled together, to act as

Node at points of moment minimums at the built-in carrier.

8. A process for producing a glued SBH or KVH carrier (2) with at least one glued-in reinforcing strip (1), characterized in that on the train to be loaded on the side of the SBH or

KVH carrier (2) for each einzuklebende reinforcing tape (1) a milling cut (3) for receiving the einzuklebenden reinforcing tape (1) is introduced and then from the longitudinal center of the SBH or KVH Carrier (2) from each reinforcing strip (1) is solidified simultaneously over the same parallel sections with section by section degressively decreasing tension by means of adhesive (4) with the SBH or KVH support.

9. A method for producing a glued SBH or KVH carrier (2) with at least one glued-in reinforcing strip (1) according to claim 8, characterized in that on the train to be loaded on the side of the SBH or KVH carrier (2) for each reinforcing band (1) to be glued in is a milling cut (3) for receiving the adhesive to be glued

Reinforcing tape (1) is introduced and after the at least one reinforcing tape (1) is glued in the central region by means of an epoxy resin, and in the subsequent area by means of an adhesive of lower rigidity, and after curing, the bias voltage is released, to produce a gradient anchorage.

10. A method for producing a glued SBH or KVH carrier with at least one glued reinforcing strip (1) according to claim 8, characterized in that a) on the train to be loaded side of the SBH or KVH carrier (2) for each to be adhered reinforcing strip (1) a milling cut (3) for receiving the einzuklebenden reinforcing tape (1) is introduced; b) in each milling section (3) the einzuklebende reinforcing tape (1) is inserted and tensioned with maximum clamping force; c) via a central portion (7) with respect to the length of the SBH or KVH carrier (1) in each milled cut (3) on both sides of the inserted reinforcing strip (1) adhesive (4), for example epoxy resin is pressed; d) the adhesive in each milling section (3) of the central portion (7) is cured by the action of heat, while maintaining the tension of the reinforcing strip (1); e) the tension of each reinforcing band (1) to a lower value is reduced; f) via the on both sides of the already solidified portion (7) subsequent sections (8,9, ..) of each inserted reinforcing tape adhesive is pressed; g) the adhesive in these two sections (8) is cured by the action of heat, while maintaining the reduced tension of each reinforcing strip (1); h) then, if necessary, the steps e) to d) until the two end portions of the SBH or KVH carrier (2) are solidified with the one or more reinforcing bands (1).

11. Use of a glued Schichtbauholz- or Keilverzinkten wood carrier (2) with at least one eccentrically glued on one side, standing under tension reinforcing strip (1) made of a fiber composite material according to one of claims 1 to 6 for installation as

SBH or KVH vehicles in a building.

12. Use of a glued Schichtbauholz- or finger-jointed wood support (2) to claim 7 with alternating over several areas bias as a bridge over three or more columns.

12. Production plant for carrying out the method according to one of claims 8 to 10, comprising means (11, 12) for clamping one or more standing mutually parallel reinforcing bands (1) and for generating any

Tensile stress of 2OkN to 18OkN in the same over a remaining free portion of at least 3 meters in length, further a hoist (13) for gripping and moving a SBH or KVH carrier (2) and for driving over the tensioned reinforcing bands (1) with such , with at least one slot slot (3) provided SBH or KVH carrier (2) in

Direction across the prestressed reinforcing strip (1).

13. Production plant according to claim 12 for carrying out the method according to one of claims 8 to 10, characterized in that the means for clamping one or more standing mutually parallel reinforcing bands (1) and for generating an arbitrary tensile stress of 2OkN to 18OkN in the same over a vacant part of at least 3 meters in length two sides each having three hydraulically or mechanically driven tension wheels (12), so that their tangents run on three perpendicular to the ground planes, and that the hoist (13) for gripping and moving a SBH or KVH carrier (2) a hydraulic Includes lifting device.