DE866246C - U- or C-shaped steel beam - Google Patents

U- or C-shaped steel beam

Info

Publication number
DE866246C
DE866246C DEP3261A DEP0003261A DE866246C DE 866246 C DE866246 C DE 866246C DE P3261 A DEP3261 A DE P3261A DE P0003261 A DEP0003261 A DE P0003261A DE 866246 C DE866246 C DE 866246C
Authority
DE
Germany
Prior art keywords
shaped steel
steel beam
center
shear
flange ends
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.)
Expired
Application number
DEP3261A
Other languages
German (de)
Inventor
Erwin Bargmann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEP3261A priority Critical patent/DE866246C/en
Application granted granted Critical
Publication of DE866246C publication Critical patent/DE866246C/en
Expired 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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
    • 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
    • E04C2003/0413—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 being built up from several parts
    • 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
    • E04C2003/0465—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 square- or rectangular-shaped
    • 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
    • E04C2003/0473—U- or C-shaped

Description

U- oder C-förmige Stahlträger lassen sich einzeln als Biegeträger nicht ausnutzen, da ihr Schubmittelpunkt bekanntlich außerhalb des Profils liegt. Es müssen daher entweder wesentliche Abstriche von der Tragfähigkeit gemacht oder zwei einzelne Träger zu einem Doppelträger von I- oder Kastenform zusammengesetzt werden. Diese Maßnahmen führen zu Gewichtsvermehrungen, die vornehmlich auch im Hinblick auf den neuzeitlichen Stahlleichtbau vermieden werden müssen. U- or C-shaped steel girders cannot be used individually as bending girders, since their center of shear is known to be outside the profile. Either significant reductions in load-bearing capacity have to be made, or two individual girders have to be combined to form a double girder with an I or box shape. These measures lead to an increase in weight, which must be avoided primarily with regard to modern lightweight steel construction.

Erfindungsgemäß werden die geschilderten Nachteile durch einen einteiligen U- oder C-förmigen Träger beseitigt, dessen auskragende Flansche an ihren äußeren Enden durch Stege in angemessenen Abständen ausgesteift sind.According to the invention, the disadvantages outlined are alleviated by a one-piece Eliminated U- or C-shaped beam, whose cantilevered flanges on their outer Ends are stiffened by webs at appropriate intervals.

Die Anordnung und Abmessung der Verbire-. dungen der freien Flanschenden wird so gewählt, daß der Schubmittelpunkte ganz oder nahezu im Schnittpunkt der Schwerachsen liegt. Dadurch wird der Träger in seinem Verhalten sowohl bei Biegung als auch bei Knickung dem symmetrischen Träger gleichwertig.The arrangement and dimensions of the verbire. connections of the free flange ends is chosen so that the shear centers are entirely or almost at the intersection of the The center of gravity lies. This increases the behavior of the beam both when it is bent as well as being equivalent to the symmetrical beam in the case of buckling.

Es ist ein mehrteiliger U-fürmiger Träger bekanntgeworden, dessen Flanschenden durch zäckzackförmig verlaufende Stäbe verbunden sind, deren Aufgabe es ist, als Stützen zur Aufnahme wiederholter Einzellasten zu dienen.. Die dem Erfindungsgegenstand zugrunde liegende Erkenntnis ist daraus nicht zu entnehmen.A multi-part U-shaped carrier has become known, its Flange ends are connected by serrated bars, their task it is to serve as supports for absorbing repeated concentrated loads .. the subject of the invention underlying knowledge cannot be derived from it.

Die Abb. i und 2 zeigen Ausführungsbeispiele. Der C-Träger i nach Abb. i erhält als Verbindung seiner änßereh Flanschenden Stege 2, die hier U-Form besitzen und an beiden Enden zwecks besseren Anschlusses aufgebogen sind. Sie können auch aus Bandstahl oder kleinen Profilen Irgendwelcher Art bestehen. Die Stege müssen je nach Träger- und Stegform durch Schweißung oder Nietung mit darr. Flanschenden des Trägers verbunden werden. Der so entstandene Rahmen erhöht die Belastungsfähigkeit des Trägers wesentlich.Figs. I and 2 show exemplary embodiments. The C-beam i after Fig. I receives as a connection of its änßereh flanged webs 2, the U-shape here and are bent up at both ends for better connection. You can also consist of strip steel or small profiles of any kind. The jetties must Depending on the shape of the beam and web, by welding or riveting with darr. Flange ends of the carrier are connected. The resulting frame increases the load-bearing capacity of the wearer is essential.

Abb. 2 zeigt einen U=Träger 3, dessen offene Seite durch einen Gittersteg 4 geschlossen ist,. Der Gittersteg kann in bekannter Weise aus Vierkantstahlrohr oder anderem geeignetem Stabstahl hergestellt werden und wird vorteilhaft durch Schmelz- oder Widerstandsschweißung mit den Flansehenden verbunden. Das anteilige Gewicht eines solchen Gittersteges ist geringer als das der einzelnen Stege.Fig. 2 shows a U = beam 3, the open side of which is through a lattice web 4 is closed. The lattice web can be made of square steel tube in a known manner or other suitable bar steel and is advantageously made by Fusion or resistance welding connected to the flange ends. The proportional The weight of such a lattice web is less than that of the individual webs.

Die Abstützung der offenen Trägerseite durch Einzelstege oder einen Gittersteg zieht den Schubmittelpunkt in das Profil hinein. und ist so angeordnet und bemessen, daß der Schubmittelpunkt etwa im Schnittpunkt der Schwerachsen des Profils liegt.The support of the open side of the carrier by means of individual bars or a The lattice web pulls the shear center into the profile. and is so arranged and dimensioned that the shear center approximately at the intersection of the axes of gravity Profile lies.

Claims (1)

PATENTANSPRUCH: Einteiliger U- oder C-färmiger Stahlträger, dadurch gekennzeichnet, daß er an den ausleragenden Flanschenden durch Verbindungsglieder so ausgesteift ist, daß der Schubmittelpunkt des Profils etwa in den Schwerpunkt fällt. Angezogene Druckschriften: Deutsche Patentschrift Nr. 668 474; USA.-Patentschriften INTr. 2 338 468, 2 39h:21674; »Die Bautechnik« 1938, S. 116, Bild i.PATENT CLAIM: One-piece U- or C-shaped steel girder, characterized in that it is stiffened at the protruding flange ends by connecting links so that the shear center of the profile falls roughly in the center of gravity. Cited publications: German Patent No. 668 474; USA patents INTr. 2,338,468, 2,39h: 21674; »Die Bautechnik« 1938, p. 116, picture i.
DEP3261A 1948-10-02 1948-10-02 U- or C-shaped steel beam Expired DE866246C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP3261A DE866246C (en) 1948-10-02 1948-10-02 U- or C-shaped steel beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP3261A DE866246C (en) 1948-10-02 1948-10-02 U- or C-shaped steel beam

Publications (1)

Publication Number Publication Date
DE866246C true DE866246C (en) 1953-02-09

Family

ID=7358619

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP3261A Expired DE866246C (en) 1948-10-02 1948-10-02 U- or C-shaped steel beam

Country Status (1)

Country Link
DE (1) DE866246C (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668474C (en) * 1938-12-03 Maschf Augsburg Nuernberg Ag Crane girders
US2338468A (en) * 1942-06-19 1944-01-04 John R Tench Channeled girder or truss
US2392674A (en) * 1942-10-03 1946-01-08 Structural Patents Corp Reinforced i-beam

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668474C (en) * 1938-12-03 Maschf Augsburg Nuernberg Ag Crane girders
US2338468A (en) * 1942-06-19 1944-01-04 John R Tench Channeled girder or truss
US2392674A (en) * 1942-10-03 1946-01-08 Structural Patents Corp Reinforced i-beam

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