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WO1988003211A1 - Poutre - Google Patents

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Publication number
WO1988003211A1
WO1988003211A1 PCT/SE1987/000508 SE8700508W WO8803211A1 WO 1988003211 A1 WO1988003211 A1 WO 1988003211A1 SE 8700508 W SE8700508 W SE 8700508W WO 8803211 A1 WO8803211 A1 WO 8803211A1
Authority
WO
WIPO (PCT)
Prior art keywords
rods
flanges
anchorage
rod
pressure plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/SE1987/000508
Other languages
English (en)
Inventor
Lars Stalin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STALIN KONSULTER AB
Original Assignee
STALIN KONSULTER AB
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
Priority claimed from SE8604629A external-priority patent/SE8604629D0/xx
Priority claimed from SE8604630A external-priority patent/SE8604630D0/xx
Application filed by STALIN KONSULTER AB filed Critical STALIN KONSULTER AB
Publication of WO1988003211A1 publication Critical patent/WO1988003211A1/fr
Priority to NO882851A priority Critical patent/NO882851L/no
Priority to DK358688A priority patent/DK358688A/da
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/292—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being wood and metal

Definitions

  • the present invention relates to a beam with flanges manufactured of wood and a beam web connected to the flanges and consisting of rods manufactured from metallic tube or rod material, the rods extending reciprocally between the flanges and being accommodated, with etid portions or bent end regions, in recesses in the flanges.
  • a Beam of the type mentioned by way of introduction is previously known from SE 7610600-4.
  • the beam according to this publication has both of the beam flanges divided in two longitudinal wooden laths or battens, grooves arranged in V-shape formation in relation to one another being disposed preferably in one, but possibly in both of the laths, the grooves being intended for accommodating the bent portions of the beam web arranged in zigzag formation.
  • the grooves are of substantially the same form as the bent portions of the beam web.
  • a beam of the above-outlined prior art type has but limited carrying capacity and, moreover, suffers from a relatively large sagging before breakage.
  • the cause of the problems inherent in the prior art beam is primarily to be found in the different strength properties in the wood material on the one hand, and in the steel material of the beam web on the other.
  • SE 7901795-0 discloses a similar beam.
  • every other rod included in the beam web will be exposed to a compressive load, while every second rod included in the beam web will be exposed to tensile stress.
  • at least those rods in the beam web which are exposed to compressive loading must be made of more robust dimensions in order to withstand the buckling to which they would otherwise be subjected.
  • a beam web of upgraded dimensions and increased rigidity in this way entails even more serious loading problems in the transitional region between the beam web and the beam flange.
  • the present invention has for its object to realise a beam of the type disclosed by way of introduction, the beam being designed in such a manner that, even if it is given large dimensions, it will possess large load carrying capacity and suffer from minor saggings before breakage.
  • the present invention has for its object to propose a beam constructed in such a manner that the differences in material properties between the beam web and the flanges will have no negative effect.
  • the invention further has for its object to realise a beam whose function may also be maintained without the adhesion effects which characterise glue joints, as regards the connection of the beam web to the beam flanges.
  • the invention also has for its object to realise a beam which may be manufactured simply and economically in varying sizes and lengths.
  • this beam is characterised in that there are provided, in the recesses, substantially rigid anchorage bodies containing a plastic material, the rods extending thereinto; and that there are provided, in the anchorage bodies, members connected to the rods and having portions extending outside a cross-section of an adjacent portion of a rod.
  • the portions of the members located outside the cross-section of the rods are provided with surfaces which are transversely directed in relation to the longitudinal direction of the flanges.
  • the beam web is composed of a number of rods which are united with one another interiorly in the anchorage bodies.
  • the preferred embodiment of the present invention is also suitably characterised in that the members are disposed between mutually adjacent end portions on the rods.
  • the major advantage will be afforded that the member, or pressure plate, may readily be joined together with the rods; and that the member is located in such a manner that the transfer of forces will be the most favourable.
  • rods accommodated in an anchorage body are interconnected with one another exclusively by the intermediary of the anchorage bodies.
  • Fig. 1 is a plan view of a beam according to the invention
  • Fig. 2 is an end elevation of the beam of Fig. 1
  • Fig. 3 is a detail view of one of the flanges included in the beam in an anchorage region for the beam web;
  • Fig. 4 is a section taken along the line A-A in Fig. 3;
  • Fig. 5 is a view approximately corresponding to that of Fig. 4, from which will be apparent the tension distribution in the anchorage body on loading of the beam;
  • Fig. 6 shows a modified embodiment in section approximately corresponding to that of Fig. 4;
  • Figs. 7-10 show further modified embodiments in section approximately corresponding to that of Fig. 4.
  • a beam according to the present invention has two beam flanges 1 and 2 and beam web extending therebetween.
  • the beam flanges are manufactured of wood, while the beam web is manufactured or metal, preferably steel.
  • the beam is shown as being of uniform height, but of course the beam may taper along its length. In such an embodiment, the beam flanges may be of thicker cross-section at the major end of the beam.
  • the beam web 3 is manufactured of tube or rod material and may be bent in one piece from a longer continuous length of this material, or be composed of shorter pieces, so that there will thereby be formed, between the beam flanges 1 and 2, reciprocally extending rods 4. If the beam web 3 is produced by bending of long continuous length, closely adjacent rods 4 will have bent conjunction regions which may be V-shaped, U-shaped or be bent in any other suitable manner. As will be apparent from Fig. 1, these bent conjunction regions between closely adjacent rods 4 are interiorly accommodated in recesses in the two beam flanges 1 and 2.
  • the rods forming the beam web 3 have been shown as straight rods which run in zigzag formation at an angle of approximately 60° in relation to the longitudinal direction of the beam flanges.
  • the rods 4 need not be arranged in this manner, but the angle between the rods and the beam flanges may vary within broad limits. In practice, a range of between 45° and 65° has proved to be usable, in which instance 45° provides the best transfer of forces between the flanges and the rods. This entails that if the rods are viewed as rigid, an optimum strength will be obtained for this angle.
  • the rods placed under compressive loading will have a relatively large free buckling length, for which reason relatively high demands will, naturally, be placed on the material dimensions in the rods.
  • a larger angle will give poorer transfer of forces, but it should be set against this factor the very fact that the free buckling length of the rods reduces when the angle increases, for which reason, and given that the rods cannot be prefectly rigid, it is probable that the optimum will be reached with an angle which is slightly greater than 45°.
  • neither do the rods 4 need be arranged in a regular pattern, but, for example, every other rod may be at right angles to the longitudinal direction of the beam flanges, while every second rod is obliquely inclined.
  • the rods 4 exposed to compressive loading when the beam is placed under load may be at a larger angle to the beam flanges 1 and 2 than those exposed to tensile stress (see further below).
  • a further alternative may reside in the fact that the rods 4 are reciprocally bent in wave formation, between the flanges, for example following the form of a sine curve of the like.
  • the beam flanges 1 and 2 are shown as being approximately square in cross-section, but, of course, this is not a critical requirement according to the present invention, instead the cross-sectional configuration of the beam flanges may be completely different and may, for instance, be rectangular or be of any other form which proves to be practical in view of the use to which the beam is put or in view of the manner of its manufacture. As was intimated above, the cross-section may also vary along the length of the beam.
  • Figs. 3 and 4 show a first embodiment of the invention and, more closely, a detail view of one of the beam flanges 1 and 2 and the manner in which the rods 4 included in the beam web 3 are fixed in the flange. If it is assumed, in Figs. 3 and 4, that the illustrated beam flange is the lower beam flange 2, Fig. 3 will show a section of this beam flange 2 seen straight from above.
  • an anchorage body 9 which is accommodated in and completely fills the recess 5 in the flange and which is formed of a plastic composition with a thermosetting plastic and a suitable filler.
  • thermosetting plastic use may, for example, be made of polyesters, epoxy or vinyl and the proportion of filler in the plastic composition should be at least 50%.
  • the plastic composition is poured as a liquid or viscous paste into each recess 5 around the portions of the rods 4 accommodated in the recesses, so that the recesses will be completely filled with the plastic composition.
  • the recesses 5 are composed of two recesss, an outer recess 14 and an inner recess 15 in association therewith. These two recesses have outer end walls 16 and end walls 17 which are transversely directed, at right angles, or possibly slightly undercut, in relation to the longitudinal direction of the beam flange. The end walls are, furthermore, somewhat transverse of, or possibly at right angles to the horizontal resultant H (see Fig.
  • the recesses 5 in this embodiment have outer and inner bottom walls 18 and 19, respectively, which are suitably approximately parallel to the longitudinal direction of the beam flange.
  • the transitional regions between the different end walls and the bottom walls are gently curved, while the inner end walls 17 are in guiding cooperation, at the edge regions 11, with the rods 4.
  • both the end walls 16 and 17 and the bottom walls 18 and 19 are suitably arched, so that, thereby, sharp corners and loading concentrations are avoided, and the width of the recesses 5 is approximately twice the diameter of the rods 4.
  • the width which the recesses 5 must have (at right angles to the plane of the Drawing in Fig.
  • the width must, by a suitable margin, exceed the diameter or transverse dimension of the rods 4 of the beam web 3, such that indications of fracture in the anchorage bodies in register with the rods 4 will be avoided.
  • the total end surface 16 and 17 of the recess 5 must be of such an area that the normal tension caused by the resultant H (see Fig. 5) and acting via the anchorage body on the wood material will not be beyond the capacity of the wood material to absorb. It will further be apparent from Fig. 4 that there is a space 13 between the top portion 12 of the meeting rods 4 and the bottom wall 7 in the recess 5, this space being, in the finished state of the beam, filled with a part of the anchorage body 9.
  • This space is essential, as regards the strength and 'continuity' in the joint between the rods 4 and the flanges 1 and 2.
  • a part of the anchorage body 9 will lie between the top portion 12 and the bottom wall 19 of the recess 5.
  • every other rod 4 will be exposed to tensile stress, while every second rod will be exposed to compressive loading.
  • these loadings will be of equal magnitude, for which reason there is formed a resultant force H (see Fig. 5) directed along the flanges.
  • H resultant force
  • a manifest adhesion between the anchorage body 9 and the material in the beam flange might possibly increase overall strength in that the friction is increased, but such adhesion is not a critical requirement.
  • the connection between the rods 4 and the anchorage body 9 is satisfactory, such that the loadings placed on the rods are transferred to the anchorage body without any deformation or breakage in the body.
  • One of the major problems inherent in prior art technology resides in the fact that the material properties in the steel material of the rods 4 and the wood material in the beam flanges 1 and 2 differ greatly from one another. According to the present invention, it therefore applies that the anchorage body 9 must be given material properties which, as far as is possible, approach the properties of both the steel and of the wood material.
  • the elasticity modulus in the wood material may vary between the order of magnitude of 10 000 and twice that level, depending upon the type of wood employed.
  • the elasticity modulus for steel lies beyond 20 000, for which reason considerable differences may be present in the size of the deformations which the different materials undergo on being placed under load.
  • One method of realising a more or less 'continuous' transition, in terms of strength, between the different material properties resides in the fact that the anchorage body is given, in its central regions, a greater elasticity modulus than in the peripheral areas.
  • Such a variation of the elasticity modulus can be achieved in that the plastic material included in the anchorage body is given a lower degree of setting and final curing in the interface regions to the wood than applies in towards the centre.
  • the anchorage body will be harder in towards its centre than in its peripheral parts.
  • the forces which the rods 4 are to transfer to the beam flanges are so great that not even the strength properties in the plastic material of the anchorage bodies will be sufficient.
  • Fig. 5 shows the appearance of the tension distribution in the anchorage body 9 on loading of the beam in the embodiment according to Figs. 3 and 4. It should be observed that the loading direction for the rods 4 of the beam web is shown opposite to that which applies in the remaining Figures.
  • a vertical resultant may also occur in addition to the horizontal resultant H.
  • Such a vertical resultant also occurs at the outermost anchorage body at the ends of the beam.
  • these vertical resultants have but marginal effect on the strength of the beam.
  • Fig. 6 shows one embodiment of the present invention which is particularly well-suited for large beams in which the rods 4 are designed as tubular profiles. In such beams, considerable forces occur in the rods and, for this reason, the fixed retention of the rods in the anchorage bodies will pose serious problems.
  • the rods are bevelled in their mutually facing ends and, between these ends, there is disposed a pressure plate 22, which may be considered as a retention member which, in a direction transversal of the longitudinal direction of the beam flange 2, extends outside that cross-section which the closely adjacent portions of the rods 4 define in the joint region.
  • the pressure plate 22 is of a width at right angles to the plane of the Drawing of Fig. 6 which is preferably greater than the diameter of the two rods 4, so that it will have surfaces which are transversely directed not only in relation to the resultant H, but also to the longitudinal direction of the beam, and to the rods 4.
  • the pressure plate 22 is shown as being fixedly welded with symmetric welding seams in both of the rods 4, and it is presupposed that these welding seams are circumferential, such that they run about the entire periphery of the rods.
  • the rods are interconnected with one another via the pressure plate 22.
  • the left-hand rod 4 is exposed to tensile stress while the right-hand rod is exposed to compressive loading.
  • This entails that the right-hand rod 4, on loading, will influence the pressure plate 22 with a compressive force, for which reason it could possibly be conceivable to reduce the welding between the pressure plate and the right-hand rod 4 to bond welding only.
  • the relationship is the reverse as regards the left-hand rod 4, since this is exposed to tensile stress. In this case, the anchorage between the pressure plate and the rod must be complete.
  • the pressure plate 22 is fully embedded in the anchorage body 9 and thereby effectively contributes to the transfer, by the anchorage body 9, of the resultant H to those foreces which act in the rods 4.
  • the pressure plates, and also the rods 4 are united with one another via the anchorage body 9.
  • the inclination of the rods in relation to the beam flange 2 may be different, for which reason there may be a wedgeshaped space which is filled with the material of the anchorage body, between the pressure plates, or the rods may be cut at different angles.
  • the recess 5 has been shown as being of uniform width, i.e. both the outer recess 14 and the inner recess 15 are of substantially the same width.
  • the same dimensioning of the recess 5 may be employed, but it may conceivably be possible to render the inner recess 15 wider transversely of the longitudinal direction of the flange 2 than is the case for the outer recess 14 which is intimated by the broken, lines 23. In such a case, the pressure plate 22 may be allowed to extend laterally a considerable distance outside the rods 4.
  • the pressure plate 22 must be embedded in the anchorage body in a dependable manner, such that no fracture indications are formed in the anchorage body along the edges of the pressure plate 22.
  • the broadening 23 of the inner recess 15 there will also be attained larger total end surfaces on the recess 5, whereby that surface on the anchorage body 9 which is to transfer the resultant H to the wood material of the flange will be correspondingly greater.
  • Fig. 7 shows a modified embodiment in which the most crucial difference in relation to the embodiment according to Fig 6 is the employment of a transversely directed foot 24 in the lower end of the pressure plate 22 as shown in the Figure.
  • This foot is of particuluar importance in such cases where a vertical resultant is created, in addition to the horizontal resultant, by the force influence from the rods 4, this taking place at different angles of inclination of the rods 4 or at the ends of the beam.
  • the pressure plate 22 in the embodiment according to Fig. 6 may be produced by cutting of a strip or band shaped profile
  • the pressure plate 22 in the embodiment according to Fig. 7 may be produced by cutting of a T-profile.
  • connection between the left-hand rod 4 and the pressure plate 22 must be adequate, such that the mutual union therebetween is capable of absorbing large tensile stresses.
  • the inner recess 15 may be wider than the outer recess 14, as is intimated by the broken lines 23.
  • the pressure plate 22 is, in this embodiment, also suitably dimensioned in such a manner that it also extends laterally (at right angles to the plane of the Drawing) outside the cross-section defined by the rods 4 in the joint region. In the embodiment according to Fig. 8, the direction of load in the rods 4 is reversed.
  • the pressure plate 22 is provided with a side shank 25 which has the same function as the one half of the foot 24 in the embodiment according to Fig. 7, as regards facilitating absorption of a vertical resultant or compressive loading between the pressure plate 22 and the rod 4, subjected to pressure.
  • the rod 4 subjected to tensile stress (the right-hand rod on the Drawing) must be fixedly retained in the pressure plate 22 in a dependable manner.
  • one foot 24 lies, in this alternative, turned to face upwardly and one foot turned to face downwardly, while, according to Fig. 8, the side shanks 25 lie against one another such that the retention member 22 placed under pressure through the rod 4 will be located interiorly in the other.
  • the pressure .plate may be in the form of a plate with an aperture through which the bent portion 12 of the rods 4 extends. This plate or washer is, naturally, anchored in the rods by suitable means, for example by welding.
  • the washer In the operational position, the washer should be oriented in such a manner that its plane will be at right angles to, or at least approximately transvere of the longitudinal direction of the beam flange 2.
  • use may be made of two or more washers which are placed not directly in the top portion or curvature region 12 of the rods 4, but higher up along the rods 4 so that one washer may possibly be placed in the outer recess 14 of either rod, while a further washer may be placed in the inner recess 15 of either rod.
  • the plane of extent of the washers may be at right angles to the longitudinal direction of the rods 4 in question.
  • the embodiments according to Figs. 6 to 8 may, naturally, be provided in this way with washers or plates through which the rods 4 extend. These washers or plates may substitute the pressure plate 22 shown on the Drawing, but may also possibly act as supplement to the pressure plate.
  • Figs. 9 and 10 illustrate further modified embodiments of the present invention.
  • the recess 5 has been formed in a different manner than is the case for the abovediscussed embodiments and, thus, the recess is here intimated as being rectangular or slightly undercut in configuration. That which was disclosed above regarding the rounded contours of the recess also applies in both of these embodiments.
  • both of the rods have angled portions 20 which are laid over one another so that, in this instance, the left-hand rod 4, which is exposed to tensile stress, lies outside the right-hand rod, which is exposed to compressive loading.
  • the rod exposed to compressive loading (the right-hand rod on the Drawing) is of more robust dimensions than the rod exposed to tensile stress.
  • the end surfaces 27 of the rods will have a function which partly assumes the function of the above-described pressure plate 22.
  • a pressure plate (not shown) which may have a U-shaped recess for accommodating the joint regions of the rods, or which may be provided with an aperture through which one or both of the rods extend.
  • a considerable improvement of the strength properties will be achieved if the rods are not only laid together as intimated on the Drawing, but are also interconnected with one another, for example by welding.
  • the central portion of the recess 5 is wider than the remaining portions. This is intimated at the broken lines 23.
  • the angled portions 20 of the rods 4 lie in side-by-side relationship and may possibly be interconnected by welding.
  • the end surfaces 27 of the rods - and in addition to a certain extent the surfaces indicated by reference numeral 28 on the Drawing - will replace or supplement the action of the above-described pressure plate.
  • the pressure plate may be provided with an aperture through which the rods 4 extend, or have an open recess such that it may be passed in over the joint region of the rods and be fixedly retained in the rods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Surgical Instruments (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Glass Compositions (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

Une poutre possède des semelles (2) fabriquées en bois et une âme reliée auxdites semelles et constituée de tubes métalliques (4) ou de tiges métalliques qui s'étendent réciproquement entre les semelles (2) et qui, par leurs parties terminales, sont logées dans des évidements (5, 14, 15) ménagés dans lesdites semelles (2). Dans ces évidements (5, 14, 15) sont disposés des corps d'ancrage rigides (9) en plastique dans lesquels s'étendent les tubes ou tiges (4). Dans les corps d'ancrage (9) sont également prévus des éléments d'ancrage (22) reliés aux tiges et ayant des parties qui s'étendent à l'extérieur d'une section transversale de parties adjacentes des tiges (4).
PCT/SE1987/000508 1986-10-30 1987-10-29 Poutre Ceased WO1988003211A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NO882851A NO882851L (no) 1986-10-30 1988-06-28 Bjelke.
DK358688A DK358688A (da) 1986-10-30 1988-06-29 Bjaelke

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8604629-9 1986-10-30
SE8604629A SE8604629D0 (sv) 1986-10-30 1986-10-30 Balk
SE8604630-7 1986-10-30
SE8604630A SE8604630D0 (sv) 1986-10-30 1986-10-30 Balk samt sett att framstella densamma

Publications (1)

Publication Number Publication Date
WO1988003211A1 true WO1988003211A1 (fr) 1988-05-05

Family

ID=26659559

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/SE1987/000508 Ceased WO1988003211A1 (fr) 1986-10-30 1987-10-29 Poutre
PCT/SE1987/000507 Ceased WO1988003210A1 (fr) 1986-10-30 1987-10-29 Poutre et procede pour sa fabrication
PCT/SE1987/000506 Ceased WO1988003209A1 (fr) 1986-10-30 1987-10-29 Poutre

Family Applications After (2)

Application Number Title Priority Date Filing Date
PCT/SE1987/000507 Ceased WO1988003210A1 (fr) 1986-10-30 1987-10-29 Poutre et procede pour sa fabrication
PCT/SE1987/000506 Ceased WO1988003209A1 (fr) 1986-10-30 1987-10-29 Poutre

Country Status (4)

Country Link
EP (1) EP0328544A1 (fr)
AU (3) AU8231287A (fr)
DK (1) DK157205C (fr)
WO (3) WO1988003211A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10392803B2 (en) 2015-07-13 2019-08-27 9306-1695 Québec Inc. Composite I-truss

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE502301C2 (sv) * 1991-12-02 1995-10-02 Resaro Ab Balk med trådliv
DE19933101C1 (de) * 1999-07-15 2001-05-23 Hvg Haas Vertriebsgesellschaft Tragsystem aus Gitterträger und Profilholz
DE29913348U1 (de) 1999-07-15 1999-10-28 HVG-Haaß Vertriebsgesellschaft für Bauelemente mbH, 64331 Weiterstadt Tragsystem aus Gitterträger und Profilholz

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137899A (en) * 1960-10-04 1964-06-23 Arthur L Troutner Composite truss
US3961455A (en) * 1973-05-29 1976-06-08 Peters Dierk D Truss support connector
WO1980001297A1 (fr) * 1978-12-19 1980-06-26 Frelena Ab Solive du type a croisillons
US4416102A (en) * 1980-09-02 1983-11-22 Peters Dierk D Plastic bushing for use with steel/wood truss structures
WO1985002878A1 (fr) * 1983-12-20 1985-07-04 Roger Ericsson Poutre

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2051164A1 (de) * 1970-10-19 1972-06-08 Koch, Gunter, Dipl Ing , 6901 Wie senbach Fertigbau Verbundelement
DE2058113A1 (de) * 1970-11-26 1972-05-31 Koch Guenter Dipl Ing Bautafel und Verbindung derselben mit einer anderen Bautafel bzw. mit einer festen Wand
DE2603827A1 (de) * 1976-02-02 1977-08-04 Berger Geb Braeunig Hildegard Fassaden-verbundplatte
NO143232L (fr) * 1976-09-24 1900-01-01
SE447287B (sv) * 1985-03-22 1986-11-03 Kindberg Bengt Ake Balk och sett for framstellning derav

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137899A (en) * 1960-10-04 1964-06-23 Arthur L Troutner Composite truss
US3961455A (en) * 1973-05-29 1976-06-08 Peters Dierk D Truss support connector
WO1980001297A1 (fr) * 1978-12-19 1980-06-26 Frelena Ab Solive du type a croisillons
US4416102A (en) * 1980-09-02 1983-11-22 Peters Dierk D Plastic bushing for use with steel/wood truss structures
WO1985002878A1 (fr) * 1983-12-20 1985-07-04 Roger Ericsson Poutre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10392803B2 (en) 2015-07-13 2019-08-27 9306-1695 Québec Inc. Composite I-truss

Also Published As

Publication number Publication date
WO1988003210A1 (fr) 1988-05-05
DK157205C (da) 1990-08-06
AU8231287A (en) 1988-05-25
WO1988003209A1 (fr) 1988-05-05
DK358588D0 (da) 1988-06-29
EP0328544A1 (fr) 1989-08-23
AU8231087A (en) 1988-05-25
DK358588A (da) 1988-06-29
DK157205B (da) 1989-11-20
AU8231187A (en) 1988-05-25

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