DE2634576A1 - Cold rolled double tee beam - has double thickness flanges produced by repeated folding of uniform sheet metal strip - Google Patents

Cold rolled double tee beam - has double thickness flanges produced by repeated folding of uniform sheet metal strip

Info

Publication number
DE2634576A1
DE2634576A1 DE19762634576 DE2634576A DE2634576A1 DE 2634576 A1 DE2634576 A1 DE 2634576A1 DE 19762634576 DE19762634576 DE 19762634576 DE 2634576 A DE2634576 A DE 2634576A DE 2634576 A1 DE2634576 A1 DE 2634576A1
Authority
DE
Germany
Prior art keywords
double
sheet metal
sheet steel
cold rolled
steel strip
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.)
Pending
Application number
DE19762634576
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German (de)
Inventor
Auf Nichtnennung Antrag
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.)
GALLER KG
Original Assignee
GALLER KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GALLER KG filed Critical GALLER KG
Priority to DE19762634576 priority Critical patent/DE2634576A1/en
Publication of DE2634576A1 publication Critical patent/DE2634576A1/en
Pending legal-status Critical Current

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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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E04C3/07—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
    • 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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
    • 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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
    • 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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0452—H- or I-shaped

Abstract

The cold rolled double-Tee beam has a web section (1) and two parallel end sections (2, 3). Each end section is produced by folding the sheet metal once through 90 deg. and twice through 180 deg.. Thus the tapered edge (6, 7) of the sheet metal is in contact with the outside of the 90 deg. radius (2a, 3a). The upper flange (3) of the beam has its edges (5) folded through 90 deg. so that they are parallel and point towards the centre of the profile. This increases the bending strength of the beam about the Y-Y axis and generally improves the stiffness of the profile beam.

Description

Kaltgewalzter Doppel-T-Träger Cold rolled double T-beam

Die Erfindung betrifft einen kaltgewalzten Doppel-T-Träger, der aus einem einheitlichen Stück gewalzten Stahlband gleicher Breite und Wandstärke durch mehrere Walzengänge schrittweise auf Sollprofil gebracht ist und der sich insbesondere für die Anwendung als Träger im Stahlbau und vor allem im Regalbau als Einfeldträger eignet. Werden derartige kaltgewalzte Doppel-T-Träger als sogenannte Einfeldträger (Träger auf zwei Stützen) eingesetzt, so wird der obere Flansch auf Druck beansprucht, wodurch er in Abhängigkeit von der Stützlänge und der Last mehr oder weniger zum seitlichen Auskippen neigt. Diese Nachteile sind hinreichend bekannt und führen dazu, daß die auch heute am Markt befindlichen kaltgewalzten Doppel-T-Träger nur beschränkt eingesetzt werden können.The invention relates to a cold-rolled double-T-beam, which consists of a uniform piece of rolled steel strip of the same width and wall thickness several roller gears is gradually brought to the target profile and in particular for use as a beam in steel construction and especially in shelf construction as a single-span beam suitable. Such cold-rolled double-T girders are known as single-span girders (Beam on two supports) is used, the upper flange is subjected to pressure, which, depending on the support length and the load, more or less to the tends to tip over to the side. These disadvantages are well known and lead to the fact that the cold-rolled double-T-beams that are still on the market today only can be used to a limited extent.

Vor allem den Nachteil der Kippung hat man auf verschiedene Weise zu eliminieren versucht, z.B. durch Ausbildung der Gurte als Hohikörper oder durch extreme Verbreiterung der Gurte. In beiden Fällen ist ein erhöhter Materialeinsatz erforderlich. Das gleiche trifft auch bei zusammengesetzten, warmgewalzten oder bei Strangpreßprofilen zu.Above all, one has the disadvantage of tilting in different ways tries to eliminate, e.g. by forming the belts as hollow bodies or by extreme widening of the belts. In both cases there is an increased use of material necessary. The same applies to composite, hot-rolled or in the case of extruded profiles.

Es sind zwar auch warmgewalzte Doppel-T-Träger bekannt, bei denen die Flansche in bezug auf die X-Achse unsymmetrisch profiliert sind, um die Kippneigung unter Last zu vermindern. Warmgewalzte Doppel-T-Träger mit unsymmetrischem Profil sind aber teuer in der Herstellung, weil sie meist aus zwei getrennten Walzprofilen bestehen, die - nachdem sie auf Solange gebracht sind - miteinander verschweißt werden müssen.It is true that hot-rolled double-T beams are also known in which the flanges are profiled asymmetrically with respect to the X-axis to the Tendency to tip over to decrease under load. Hot-rolled double T-beams with asymmetrical profile but are expensive to manufacture because they usually consist of two separate rolled sections exist, which - after they are brought to Solange - welded together Need to become.

Aufgabe der Erfindung ist es deshalb, einen kaltgewalzten Doppel-T-Träger zu schaffen, der gegenüber den üblichen Doppel-T-Trogern bei gleichen Abmessungen eine größere Tragkraft aufweist und der mit geringeren Kosten herzustellen und leichter zu bearbeiten ist. Hierzu ist es auch erforderlich, daß die Masse weitgehend an die Gurte und an die Außenseite verlagert wird.The object of the invention is therefore to provide a cold-rolled I-beam to create compared to the usual double-T troughs with the same dimensions has a greater load capacity and is cheaper to manufacture and easier to manufacture is to be edited. For this it is also necessary that the mass is largely at the straps and is relocated to the outside.

Diese Aufgabe wird gemäß der Erfindung bei einem kaltgewalzten Doppel-T-Träger der eingangs beschriebenen Gattung mit den im Patentanspruch 1 gekennzeichneten Mitteln und Maßnahmen gelöst. Zweckmäßige Weiterbildungen und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.According to the invention, this object is achieved with a cold-rolled double-T-beam of the type described at the outset with those characterized in claim 1 Means and measures resolved. Appropriate further developments and advantageous refinements of the invention are characterized in the subclaims.

Weitere Einzelheiten der Erfindung sind im folgenden anhand eines Ausführungsbeispieles näher beschrieben und in der Zeichnung dargestellt.Further details of the invention are given below with reference to a Embodiment described in more detail and shown in the drawing.

Der kaltgewalzte Doppel-T-Träger gemäß der Erfindung ist aus einem gewalzten Stahlblechband von gleicher Breite und Wandstärke hergestellt, indem das Bandmaterial schrittweise durch mehrere Walzengänge auf das gewünschte Profil gebracht wird. Der in der Zeichnung dargestellte Doppel-T-Träger ist aus einem einzigen einheitlichen Stück Bandmaterial hergestellt und setzt sich aus dem Steg 1, dem unteren Flansch 2 und dem oberen Flansch 3 zusammen, wobei sich die Flansche an beiden Seiten des Steges 1 an den um einen zulässigen Radius abgewinkelten Stegwurzeln 2a und 3a anschließen. Der untere Flansch 2 ist an den Punkten 2b und 2b' durch Falten des Stahlblechbandes um jeweils 1800 so ausgebildet, daß zwei Bahnen des Stahlblechbandes parallel nebeneinander verlaufen und dicht aneinander, d.h. praktisch ohne Luftspalt anliegen. Der obere Flansch 3 (Obergurt) ist im Prinzip auf die gleiche Weise, jedoch mit größerer Flanschbreite hergestellt, wobei dann die beiden außen liegenden Streifen des Flansches 3 um einen zulässigen Radius bei 4 bzw. 4' derart rechtwinklig nach unten abgebogen sind, daß sich an den beiden Seiten des Obergurtes 3 zwei nach unten hängende Stege 5, 5' bilden. Die sich durch die beiden seitlichen Abbiegungen 5, 5' ergebende Breite des oberen Flansches 3 kann dann der Breite des unteren Flansches 2 entsprechen.The cold rolled I-beam according to the invention is made of one rolled sheet steel strip of the same width and wall thickness produced by the Strip material gradually brought to the desired profile through several roller passes will. The double-T-beam shown in the drawing is made of a single unit Piece of band material made and consists of the web 1, the lower flange 2 and the upper flange 3 together, with the flanges on both sides of the Connect the web 1 to the web roots 2a and 3a angled by a permissible radius. The lower flange 2 is at points 2b and 2b 'by folding the steel strip around 1800 each designed so that two strips of sheet steel strip parallel to each other run and close to each other, i.e. they are in contact with practically no air gap. The upper flange 3 (upper flange) is basically the same, but with larger flange width produced, with the two outer strips of the flange 3 by a permissible radius at 4 or 4 'so at right angles are bent down that there are two down on both sides of the top belt 3 hanging webs 5, 5 'form. The two lateral turns 5, 5 'resulting width of the upper flange 3 can then be the width of the lower flange 2 correspond.

Der durch die hängenden Stege 5, 5' gewonnene zusätzliche Materialquerschnitt im Abstand von der Y-Achse bewirkt eine Erhöhung des Widerstands-und Trägheitsmomentes um die Y-Achse, wodurch die befürchtete Kippneigung des Trägers, insbesondere bei seiner Anwendung als Einfeldträger, wesentlich herabgesetzt wird. Die Belastbarkeit und Stabilität des neuen Doppel-T-Trägers wird noch dadurch erhöht, daß die beiden Seitenkanten des Stahlblechbandes 6 und 7 auf dem gebogenen Rücken der Stegwurzeln 2a, 3a aufsitzen. Vorzugsweise sind die Außenkanten 6 und 7 des Stahlblechbandes unter 0 etwa 45 abgeschrägt, so daß die Kanten 6, 7 nach Art von Tangentialebenen an den äußeren Biegekanten der Stegwurzeln 2a, 3a fest anliegen. Diese Profilform hat unter Berücksichtigung der Kippung wesentlich günstigere Gewichte aufgrund der optimalen Massenverteilung, im Vergleich mit herkömmlichen, am Markt befindlichen Profilen.The additional material cross-section obtained by the hanging webs 5, 5 ' at a distance from the Y-axis causes an increase in the moment of resistance and moment of inertia around the Y-axis, reducing the feared tilting tendency of the carrier, especially at its use as a single-span beam, is significantly reduced. The resilience and the stability of the new I-beam is increased by the fact that the two Side edges of the sheet steel band 6 and 7 on the curved back of the web roots 2a, 3a sit on. The outer edges 6 and 7 are preferably of the sheet steel strip beveled below 0 about 45, so that the edges 6, 7 in the manner of tangential planes rest firmly against the outer bending edges of the web roots 2a, 3a. This profile shape taking into account the tilting, has much cheaper weights due to the optimal mass distribution compared to conventional ones on the market Profiles.

Claims (3)

Ansprüche: (1.)Kaltgewalzter Doppel-T-Träger, der aus einem einheitlichen Stück gewalzten Stahlblechband gleicher Breite und Wandstärke durch mehrere Walzengänge schrittweise auf Sollprofil gebracht ist, vorzugsweise für die Anwendung im Regalbau, dadurch gekennzeichnet, daß der untere Flansch (2) durch zwei Faltungen (2b, 2b') des Stahlblechbandes um 1800 zwei dicht aneinander anliegende parallele Materialschichten aufweist, daß der obere Flansch (3) im Prinzip in gleicher Weise aufgebaut ist, daß jedoch seine beiden äußeren Streifen (5, 5') symmetrisch zur Stegmittelebene (Y-Y) im rechten Winkel um einen zulässigen Biegeradius (Bei 4 und 4') nach unten abgebogen sind, wobei die beiden Seitenkanten (6, 7) des Stahlblechbandes auf den äußeren Biegekanten der Stegwurzeln (2a, 3a) aufsitzen. Claims: (1.) Cold-rolled double-T-beam, which consists of a single Piece of rolled sheet steel strip of the same width and wall thickness through several roller passes is gradually brought to the target profile, preferably for use in shelf construction, characterized in that the lower flange (2) by two folds (2b, 2b ') of the sheet steel band around 1800 two closely adjacent parallel layers of material has that the upper flange (3) is constructed in principle in the same way, However, that its two outer strips (5, 5 ') are symmetrical to the web center plane (Y-Y) downwards at a right angle by a permissible bending radius (at 4 and 4 ') are bent, the two side edges (6, 7) of the sheet steel strip on the the outer bending edges of the web roots (2a, 3a) sit on. 2. Doppel-T-Träger nach Anspruch 1, dadurch gekennzeichnet, daß die Seitenkanten (6, 7) des Stahlblechbandes derart abgeschrägt sind, daß sie als Tangentialebenen an den äußeren Biegekanten der Stegwurzeln (2a, 3a) anliegen. 2. Double-T-beam according to claim 1, characterized in that the Side edges (6, 7) of the sheet steel strip are beveled in such a way that they act as tangential planes rest against the outer bending edges of the web roots (2a, 3a). 3. Doppel-T-Träger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die beiden Flansche (2, 3) dieselbe Breite haben. 3. Double-T-beam according to claim 1 or 2, characterized in that that the two flanges (2, 3) have the same width.
DE19762634576 1976-07-31 1976-07-31 Cold rolled double tee beam - has double thickness flanges produced by repeated folding of uniform sheet metal strip Pending DE2634576A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762634576 DE2634576A1 (en) 1976-07-31 1976-07-31 Cold rolled double tee beam - has double thickness flanges produced by repeated folding of uniform sheet metal strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762634576 DE2634576A1 (en) 1976-07-31 1976-07-31 Cold rolled double tee beam - has double thickness flanges produced by repeated folding of uniform sheet metal strip

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DE2634576A1 true DE2634576A1 (en) 1978-02-02

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385137A (en) 1980-12-19 1983-05-24 Bayer Aktiengesellschaft Dispersions of polymers containing sulphonate groups, a process for the production thereof and their use as coating agents
US4520609A (en) * 1982-09-27 1985-06-04 Donn Incorporated Grid tee for suspension ceilings or the like
US4852325A (en) * 1987-10-26 1989-08-01 Chicago Metallic Corporation Reinforced bead
US4932186A (en) * 1989-04-06 1990-06-12 Chicago Metallic Corporation Reinforced bead
WO1998005836A1 (en) * 1996-08-06 1998-02-12 Mario Tosoni Double-tau-profile
DE29801562U1 (en) * 1998-01-30 1999-06-24 Tegometall Int Ag Shelf beam
DE102010020587A1 (en) * 2010-05-14 2011-11-17 Powerwind Gmbh Transformer replacement
DE102011009544A1 (en) * 2011-01-27 2012-08-02 Ulrike Weber Single-piece steel construction profile e.g. twin T-shaped beam for girder, has vertical bar, lower and upper lateral projecting flanges and upper vertical outer flanges that are designed relative to respective manipulated variables

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385137A (en) 1980-12-19 1983-05-24 Bayer Aktiengesellschaft Dispersions of polymers containing sulphonate groups, a process for the production thereof and their use as coating agents
US4520609A (en) * 1982-09-27 1985-06-04 Donn Incorporated Grid tee for suspension ceilings or the like
US4852325A (en) * 1987-10-26 1989-08-01 Chicago Metallic Corporation Reinforced bead
US4932186A (en) * 1989-04-06 1990-06-12 Chicago Metallic Corporation Reinforced bead
WO1998005836A1 (en) * 1996-08-06 1998-02-12 Mario Tosoni Double-tau-profile
DE29801562U1 (en) * 1998-01-30 1999-06-24 Tegometall Int Ag Shelf beam
WO1999038416A1 (en) 1998-01-30 1999-08-05 Tegometall (International) Ag Shelf cross-bar
DE102010020587A1 (en) * 2010-05-14 2011-11-17 Powerwind Gmbh Transformer replacement
DE102011009544A1 (en) * 2011-01-27 2012-08-02 Ulrike Weber Single-piece steel construction profile e.g. twin T-shaped beam for girder, has vertical bar, lower and upper lateral projecting flanges and upper vertical outer flanges that are designed relative to respective manipulated variables

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