US3737964A - Expanded structural members - Google Patents

Expanded structural members Download PDF

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Publication number
US3737964A
US3737964A US00166390A US3737964DA US3737964A US 3737964 A US3737964 A US 3737964A US 00166390 A US00166390 A US 00166390A US 3737964D A US3737964D A US 3737964DA US 3737964 A US3737964 A US 3737964A
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Prior art keywords
struts
chords
web
edge portions
load transmitting
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Expired - Lifetime
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US00166390A
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English (en)
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H Jury
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Jury and Spiers Pty Ltd
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Jury and Spiers Pty Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
    • B21D47/02—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars by expanding
    • 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
    • E04C3/083—Honeycomb girders; Girders with apertured solid 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
    • E04C3/29—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
    • 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
    • E04C2003/043—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 hollow cross-section comprising at least one enclosed cavity
    • 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
    • E04C2003/0465—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/18—Expanded metal making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/49623—Static structure, e.g., a building component
    • Y10T29/49625—Openwork, e.g., a truss, joist, frame, lattice-type or box beam

Definitions

  • ABSTRACT 30 Foreign A li tio priority Data
  • a method 06 forming an expanded structural member, Jul 31 1970 Australia 2042 and a structural member formed thereby, wherein y spaced parallel longitudinally extending rows of open- [52]
  • U 8 Cl 29/155 R 29/6 1 52/635 ings are pierced in a web of a member of ductile metal 51 IntICIII IIIIIIII II: 1125; 17 00 which has a wnstam cmss'sectional Shape the 58 Field 61 Search 52/635, 696, 690, P of "1 52/636, 692495; 29/61, 155 R, 155 C row so as to form a series of strut forming elements 1n the web, forcing the parallel edges of the member apart [56] References Cited so as to stretch the elements and thus form struts, the
  • a structural member is formed by a method which includes firstly forming a member of ductile metal having a constant cross-sectional shape which comprises a pair of spaced parallel longitudinally extending edge portions and a web joining those web portions, and the web is pierced with a plurality of spaced partly longitudinal rows of openings which overlap one another, and
  • a structural girder of lattice or-half lattice type is formed which is suitable for load bearing.
  • the metal should be sufficiently ductile to allow the struts to be formed by elongating, the elongation process normally being a simple straining process, and elongation beyond the yield point, while hardening the metal forming the struts, nevertheless can result in a slight degree of necking", thatis, reduction in diameter at a localised point.
  • the factor of safety should be increased beyond that normally used for a girder of similar configuration and dimension but made by a fabricating process, although even with an increase of factor of safety the cost of production is very small. If such a girder is tested to destruction, destruction will occur due to buckling of the chords which are in compression or of the struts which are in compression. As is well known in the art the shear loading on the girder or truss is resisted by transformation into compressive and tensile forces in the elements which'define the triangles of the truss.
  • the main object of this invention is to provide a method of forming a truss whereby the buckling forces are, substantially reduced, and in one of its forms the invention consists of the method of forming an expanded structural member which comprises forming a member of ductile metal having a constant cross-sectional shape which comprises a pair of spaced parallel longitudinally extending edge portions and a web joining the edge portions, at least partly piercing at least two spaced parallel longitudinally extending rows of openings in the web, the openings of each row overlapping thoseof the next adjacent row so as to form therebetween a series of deformable elements of the web interconnected by junction portions, urging the edge portions apart so as ,to extend the lengths of the deformable elements to 'ship with the flanges to thereby transmit at least portion ofa load imposed on one of the chords in the direction of the other
  • the invention also relates to an expanded structural member which is formed by the method of the invention, and comprises chords and struts of a unitary piece of metal and load transmitting members extending between the chords where they are joined to struts.
  • load transmitting members are stiff spacer members which extend between the chords of the truss to transmit load from a first chord to a second chord at the location of the intersection of the struts with the second chord, or if they are plates which engage the chords along their edges.
  • FIG. 1 is a perspective view showing a member of ductile metal having a constant cross-sectional shape but having been pierced with three spaced parallel longitudinal rows of openings in its web,
  • FIG. 2 is a side elevation showing the member ofFIG. 1 after the edge portions thereof have been urged apart to form chords and to simultaneously extend the lengths of deformable elements of the webs and thus form them into struts inclined to the chords, FIG. 2 showing in dotted lines one mode of inserting load transmitting members between the chords,
  • FIG. 3 is a section taken on line III-Ill of FIG. 2 wherein the load transmitting member is represented as a stiff spacer of timber,
  • FIG. 4 is a section on line IVIV of FIG. 2 illustrated as the load transmitting member, a stiff spacer member formed from square section tube,
  • FIG. 5 is a schematic diagram showing the tensile and compressive forces in a half lattice girder when used as a beam, loaded from the top and supported at its ends from the bottom,
  • FIG. 6 is a similar diagram of the same half lattice girder when inverted, under the same loading and similarly supported, the half lattice girder however being modified with stiff spacer members, FIG. 6 then showing loadings which may be compared with those of FIG. 5, i
  • FIG. 7 is a partly sectioned perspective view showing a further embodiment wherein the load transmitting members are formed by continuous plates, and
  • FIG. 8 shows a still further embodiment wherein the load transmitting members are formed by stiff spacer members of timber, and wherein the chords also contain timber, FIG. 8 being a truss suitable for use in buildings.
  • the first embodiment refers to FIGS. 1, 2, 3 and 4, and in FIG. 1 a member 30 of ductile metal is formed by an extrusion process, in this embodiment the metal being a.ductile grade of aluminium alloy.
  • the member has edge portions constituted by flanges 31 which are interconnected by a web 32, the web 32 having extending along it a pair of ribs 33, and a series of openings 34 are pierced in the web 32, there being three rows of openings 34 one between the ribs 33 and one on each side of each of the ribs.
  • the openings of each row overlap as shown in FIG. I so as to form those portions of the ribs 33 which lie between the overlapping portions of the openings 34 into a series of deformable elements which are designated 35.
  • FIG. 2 shows the next stage in the formation of the truss wherein the flanges 31 are urged apart so as to thereby strain the deformable elements 35 beyond their yield point, lengthening them and forming the inclined struts 36, the struts 36 being interconnected by junction portions 37 which also interconnect the struts 36 to the web 32 as illustrated in FIG. 2, the flanges 31 then becoming the chords of the truss so formed. It will be noted that the central axes of the struts 36 intersect,
  • junction portions 37 it is important to arrange the length of junction portions 37 so that this will occur.
  • FIG. 3 illustrates one form which the load transmitting members may take.
  • the load transmitting member is a stiff spacer member 40 which has grooves 41 in its upper and lower ends, the grooves 41 being positioned over the ribs 33 where they are joined to the web 32 by the junction portions'37.
  • Fastening members 42 secure the ends of the stiff spacer members 40 against possible displacement.
  • the spacer members 40 are positioned as shown to have their ends over the junction portions 37 in order to avoid placing bending moments on those portions of the flanges 31 which are unsupported by the struts 36.
  • the struts 36 are inclined as shown in FIG.
  • stiff spacer member 45 is a tubular member formed from square section tube again having grooves 41 positioned'over the ribs 33 and the junction portions 37. Rivets 46 secure the ends of the spacer member 45 against displacement.
  • FIG. 5 showing a load of thirty kilograms divided into three equal portions of the junction portions between the struts and top chord of a half lattice girder which can be formed readily by this invention, and it will be seen that the end struts designated 49 each carry a compressive loading of twenty-five kilograms while the top chords designated 50 each carry a compressive loading of 26.6 kilograms.
  • the figures shown alongside each of the elements of the chords and each of the struts indicate respective loadings and the letters and t indicate compressive and tensile stresses respectively. If FIG. is compared with FIG.
  • the expanded structural member generally designated 57 includes upper and lower flanges 58 and 59 respectively and an intermediate strut 60, the flanges 58 and 59 being joined by the struts 60 as in the other embodiments.
  • the upper and lower flanges however each have inwardly facing beads 61 arranged in two pairs in each flange and defining between them four channels, channels on respective sides of the strut 60 retaining upper and lower edges of a shear plate 62 on each side, the shear plate 62 being inserted by straining the intermediate struts 60, positioning each shear plate 62 in its respective lower channel, and releasing the strain on the struts so that the resilience thereof draws the other channels into engagement with the other edges of the shear plates 62.
  • the advantage of the structure which is illustrated in FIG. 6 is even greater when the load transmitting members are shear plates as shown in FIG. 7, and the load on the shear plates is so small that decorative panels in some instances are used.
  • the flanges again designated 31 are interconnected by inclined struts 36 as in the embodiment of FIG. 2, the struts 36 being joined together and also being joined to the web 32 by the junction portions 37.
  • the flanges 31 however have upstanding edges which perform the dual function of retaining timber chord inserts 66 and also stiffening and strengthening the chords which are constituted by the flanges and the inserts.
  • the load transmitting members are again stiff spacer members 67 each formed in two portions joined together by fastening means 68, the members 67 also being of timber and extending for the full width of the flanges 31 so as to facilitate securing of other structural or decorative members required.
  • the member of constant cross-section has been described as having openings pierced therethrough.
  • the openings need not be completely pierced, but if desired the slugs formed by piercing of the openings may be only partly sheared, and removed upon the urging of the edge portions apart. In all cases the edge portions are urged apart by clamping between jaws which themselves are driven apart under hydraulic pressure.
  • each opening being a slot having parallel sides and curved ends, the openings of each row overlapping those of the next adjacent row so as to form therebetween a series of deformable elements of the web interconnected by junction portions, said deformable elements each comprising portion of a said rib,
  • edge portions urging the edge portions apart so as to extend the length of the deformable elements to thereby form struts and form chords of the edge portions
  • chords comprise flanges each having two pairs of inwardly directed beads with a pair on each side of said struts, each pair of inwardly directed beads forming a channel therebetween, said method comprising the further step of straining the struts, positioning each of two said plates between the channels on respective sides of the struts, and releasing the strain on the struts whereby the resilience of the struts retains the edges of the plates in respective channels.
  • each load transmitting member is a stiff spacer member extending between the chords, the method further comprising engaging at least one end of each load transmitting memberv with one of the chords at the location of a junction portion between that chord and a said strut.
  • flanges comprise said chords, the method further comprising interpositioning each said stiff spacer member between the flanges and securing it thereto.
  • each spacer member contains grooves in its ends, the method further comprising positioning the grooves over the struts at the location of junction portions between the struts and the edge portions.
  • spacer members are formed of tubular metal having a square cross-sectional shape.
  • edge portions are channels which contain timber.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
US00166390A 1970-07-31 1971-07-27 Expanded structural members Expired - Lifetime US3737964A (en)

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AUPA204270 1970-07-31

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US (1) US3737964A (enExample)
CA (1) CA960830A (enExample)
DE (1) DE2137984A1 (enExample)
FR (1) FR2100977B1 (enExample)
GB (1) GB1319698A (enExample)
ZA (1) ZA714989B (enExample)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510727A (en) * 1981-07-08 1985-04-16 Ampliform Pty. Ltd. Grid supported structure
US4545170A (en) * 1983-12-21 1985-10-08 Donn Incorporated Expanded metal products
US4907735A (en) * 1987-08-11 1990-03-13 Showa Aluminum Kabushiki Kaisha Process for producing a chassis for vehicles
ES2192475A1 (es) * 2002-01-24 2003-10-01 Sistemas Tecn Encofrados Sa Perfeccionamientos en encofrados de madera.
RU2333104C1 (ru) * 2007-05-04 2008-09-10 Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" Способ изготовления сотового заполнителя
RU2337007C1 (ru) * 2007-05-21 2008-10-27 Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" Способ изготовления сотового заполнителя
US20090013628A1 (en) * 2005-12-07 2009-01-15 Stefan Krestel Girder-like structural element composed of individual parts connected to one another
RU2383439C1 (ru) * 2008-10-14 2010-03-10 Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" Способ изготовления сотового заполнителя
DE102009017377A1 (de) * 2009-04-14 2010-10-21 GM Global Technology Operations, Inc., Detroit Komponente einer Sitzstruktur für einen Kraftfahrzeugsitz
US20150049464A1 (en) * 2013-08-13 2015-02-19 Samsung Display Co., Ltd. Backlight unit and display device including the backlight unit
US20160221621A1 (en) * 2013-09-24 2016-08-04 Torsten Hösker Overhead Conveying Apparatus for Mounting on the Ceiling of an Assembly Plant
WO2019180067A1 (de) * 2018-03-20 2019-09-26 Peri Gmbh Schalungsträger mit einem durch ein innenfachwerk ausgesteiften hohlprofilsteg als gurtverbinder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224699B (en) * 1988-11-11 1993-03-24 Kymmene Corp Flat load-bearing element, girder and system for making a flat load-bearing structure
CN112177244A (zh) * 2020-09-01 2021-01-05 江西理工大学 一种腹板开孔的h型钢梁其制作方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1571238A (en) * 1920-06-28 1926-02-02 Dornier Claudius Wooden girder
US1763944A (en) * 1927-11-02 1930-06-17 Bates Expanded Steel Truss Com Joist and the manufacture thereof
US1791680A (en) * 1928-08-24 1931-02-10 Albert F Miller Joint lock
US1899344A (en) * 1928-12-04 1933-02-28 Macomber Stanley Composite wood-metal structural member
US2055701A (en) * 1934-05-24 1936-09-29 Palmer Robert Kendrick Steel joist for concrete floors
US3364646A (en) * 1966-12-09 1968-01-23 Eliot I. Snider Wooden joist or beam

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1718938A (en) * 1929-07-02 Charles i
FR508720A (fr) * 1919-02-05 1920-10-21 George Hutchinson Nouveaux perfectionnements aux éléments de charpente pour poutres, colonnes, etc.
US1927442A (en) * 1932-04-04 1933-09-19 Charles W Laufle Trussed structure and method and shapes therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1571238A (en) * 1920-06-28 1926-02-02 Dornier Claudius Wooden girder
US1763944A (en) * 1927-11-02 1930-06-17 Bates Expanded Steel Truss Com Joist and the manufacture thereof
US1791680A (en) * 1928-08-24 1931-02-10 Albert F Miller Joint lock
US1899344A (en) * 1928-12-04 1933-02-28 Macomber Stanley Composite wood-metal structural member
US2055701A (en) * 1934-05-24 1936-09-29 Palmer Robert Kendrick Steel joist for concrete floors
US3364646A (en) * 1966-12-09 1968-01-23 Eliot I. Snider Wooden joist or beam

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510727A (en) * 1981-07-08 1985-04-16 Ampliform Pty. Ltd. Grid supported structure
US4545170A (en) * 1983-12-21 1985-10-08 Donn Incorporated Expanded metal products
US4907735A (en) * 1987-08-11 1990-03-13 Showa Aluminum Kabushiki Kaisha Process for producing a chassis for vehicles
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Also Published As

Publication number Publication date
GB1319698A (en) 1973-06-06
CA960830A (en) 1975-01-14
FR2100977A1 (enExample) 1972-03-24
FR2100977B1 (enExample) 1974-04-26
DE2137984A1 (de) 1972-02-17
ZA714989B (en) 1972-08-30

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