GB478442A - Improvements in or relating to girders, profile irons and the like - Google Patents

Improvements in or relating to girders, profile irons and the like

Info

Publication number
GB478442A
GB478442A GB21485/36A GB2148536A GB478442A GB 478442 A GB478442 A GB 478442A GB 21485/36 A GB21485/36 A GB 21485/36A GB 2148536 A GB2148536 A GB 2148536A GB 478442 A GB478442 A GB 478442A
Authority
GB
United Kingdom
Prior art keywords
section
ridges
axis
width
girders
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
GB21485/36A
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.)
Nordiska Armaturfabrikerna AB
Original Assignee
Nordiska Armaturfabrikerna 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
Application filed by Nordiska Armaturfabrikerna AB filed Critical Nordiska Armaturfabrikerna AB
Publication of GB478442A publication Critical patent/GB478442A/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
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • 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
    • 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
    • E04C2003/046—L- or T-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
    • 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
    • E04C2003/0482—Z- or S-shaped

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

478,442. Metal girders. AKTIEBOLAGET NORDISKA ARMATURFABRIKERNA. Aug. 4, 1936, No. 21485. Convention date, Oct. 1, 1935. [Class 20 (ii)] The section of a girder or profile iron has a form which is derived from a standard girder or profile iron of the same type, cross-sectional area, height, and width by omitting from the section a part of the material most remote from the neutral axis X ... X corresponding to the maximum moment of inertia of the section so as to leave ridges 1, and material is added to the section nearer the said axis and so distributed in relation both to this axis, and to the axis Y ... Y corresponding to the minimum moment of inertia that the ratio between the plastic and elastic moduli of the section obtained with respect to the axis X ... X is increased as compared with that of the standard section, while at the same time, the coefficient of form of the section as compared with that of the standard section is reduced. The calculation of the elastic modulus is based, as usual, on the assumption that the yield point of the material has been reached in the outermost layer of the section only, and that the stress at the neutral axis is zero. The calculation of the plastic moment of resistance is based on the assumption that the material of the section has become plastic throughout so that a stress equal to the yield point of the material constantly occurs in all layers of the section from the outermost layer to the neutral axis. The coefficient of form of the section is defined by the expression F/I where F is the cross-sectional area, and I the minimum moment of inertia of the section, and the desired decrease in this coefficient is therefore obtained by so distributing the material in the section as to increase the value of I. The ridges should have a width of about 1/9th to 1/3rd of the width of the profile, and a height of about <1>/15th to <1> /25th of the total height of the profile. The section may be so formed that the ratio between its plastic and elastic moduli, as referred to above, amounts to at least 1.1. Figs. 1, 4, 6, 7 and 8 show respectively the application of the invention to girders of I, channel, Z, angle, and T form, material being omitted to leave ridges 1 and added beneath the flanges as indicated in - dotted lines. The girders shown in Figs. 4 and 6 are modified by the provision of additional ridges 2 which are of the same dimensions as the ridges 1 ; the width of the flanges of such girders is increased somewhat in comparison with the width of the corresponding standard section, but the ridges 2 do not cause any alteration in the cross-sectional area or height of the section.
GB21485/36A 1935-10-01 1936-08-04 Improvements in or relating to girders, profile irons and the like Expired GB478442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE478442X 1935-10-01

Publications (1)

Publication Number Publication Date
GB478442A true GB478442A (en) 1938-01-19

Family

ID=20310422

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21485/36A Expired GB478442A (en) 1935-10-01 1936-08-04 Improvements in or relating to girders, profile irons and the like

Country Status (1)

Country Link
GB (1) GB478442A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962261A (en) * 1954-07-13 1960-11-29 Auto Specialties Mfg Co Lifting jack
US2988182A (en) * 1957-08-05 1961-06-13 Univ Kingston Extruded shapes
US3077249A (en) * 1960-08-12 1963-02-12 Abberly Nicholas Rippen Integral metal column
GB2163193A (en) * 1984-07-23 1986-02-19 William Graham Hitchins Flush mounting dwangs
GB2299826A (en) * 1995-04-12 1996-10-16 Peter Barber Freight container access barrier
DE19620290C1 (en) * 1996-04-03 1997-06-26 Bochumer Eisen Heintzmann Profiled walling-member, of Y-section and of solid steel, for tunnels and mine galleries
EP0799970A2 (en) * 1996-04-03 1997-10-08 Bochumer Eisenhütte Heintzmann GmbH &amp; Co. KG Lining for tunnels and nining galleries
US9662694B2 (en) 2011-06-22 2017-05-30 Ashley Dean Olsson Post-forming method and apparatus
CN111339613A (en) * 2020-02-25 2020-06-26 北京国网富达科技发展有限责任公司 Arc apex angle double-limb thick angle steel and design method thereof
CN111353190A (en) * 2020-02-25 2020-06-30 北京国网富达科技发展有限责任公司 Double-limb thick angle steel and design method thereof

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962261A (en) * 1954-07-13 1960-11-29 Auto Specialties Mfg Co Lifting jack
US2988182A (en) * 1957-08-05 1961-06-13 Univ Kingston Extruded shapes
US3077249A (en) * 1960-08-12 1963-02-12 Abberly Nicholas Rippen Integral metal column
GB2163193A (en) * 1984-07-23 1986-02-19 William Graham Hitchins Flush mounting dwangs
GB2299826A (en) * 1995-04-12 1996-10-16 Peter Barber Freight container access barrier
GB2299826B (en) * 1995-04-12 1999-04-14 Peter Barber Freight container access barrier
DE19620290C1 (en) * 1996-04-03 1997-06-26 Bochumer Eisen Heintzmann Profiled walling-member, of Y-section and of solid steel, for tunnels and mine galleries
EP0799970A2 (en) * 1996-04-03 1997-10-08 Bochumer Eisenhütte Heintzmann GmbH &amp; Co. KG Lining for tunnels and nining galleries
EP0799970A3 (en) * 1996-04-03 1998-08-19 Bochumer Eisenhütte Heintzmann GmbH &amp; Co. KG Lining for tunnels and nining galleries
US9662694B2 (en) 2011-06-22 2017-05-30 Ashley Dean Olsson Post-forming method and apparatus
CN111339613A (en) * 2020-02-25 2020-06-26 北京国网富达科技发展有限责任公司 Arc apex angle double-limb thick angle steel and design method thereof
CN111353190A (en) * 2020-02-25 2020-06-30 北京国网富达科技发展有限责任公司 Double-limb thick angle steel and design method thereof

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