EP0292449A2 - Mit Beton Zusammenwirkender feuerständiger Stahlträger - Google Patents

Mit Beton Zusammenwirkender feuerständiger Stahlträger Download PDF

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Publication number
EP0292449A2
EP0292449A2 EP88850148A EP88850148A EP0292449A2 EP 0292449 A2 EP0292449 A2 EP 0292449A2 EP 88850148 A EP88850148 A EP 88850148A EP 88850148 A EP88850148 A EP 88850148A EP 0292449 A2 EP0292449 A2 EP 0292449A2
Authority
EP
European Patent Office
Prior art keywords
channels
concrete
flanges
webs
bearing 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.)
Granted
Application number
EP88850148A
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English (en)
French (fr)
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EP0292449A3 (en
EP0292449B1 (de
Inventor
Jörgen Thor
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 AT88850148T priority Critical patent/ATE64974T1/de
Publication of EP0292449A2 publication Critical patent/EP0292449A2/de
Publication of EP0292449A3 publication Critical patent/EP0292449A3/en
Application granted granted Critical
Publication of EP0292449B1 publication Critical patent/EP0292449B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/943—Building elements specially adapted therefor elongated
    • E04B1/944—Building elements specially adapted therefor elongated covered with fire-proofing material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/29—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of 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
    • 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
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—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 steel and concrete
    • 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
    • E04C2003/0426—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
    • E04C2003/0443—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

Definitions

  • the present invention relates to a prefabricated steel beam intended as a load-bearing structure for structural flooring and where such flooring is preferably made from fabricated concrete elements.
  • the beam has a bottom flange projecting out on either side and is formed such as to come within the depth of the structural flooring, and such that static co-action is obtained between the steel beam and concrete suitably cast on site in connection with the normal pouring of topping concrete on the flooring elements. Due its special implementation the beam has great rigidity in relation to steel weight and structural height as well as its obtaining great fire resistance.
  • Steel beams are becoming more and more usual as supporting structures to flooring structures in multistorey buildings.
  • a conventional implementation is to use rolled steel joists of H or I section with the floor structure bearing on the upper flange.
  • a disadvantage here is that the total flooring structure depth will be large.
  • the down­wardly projecting supporting beams also make ventilation and cable laying more difficult.
  • the beams must also be suitably protected to obtain necessary fire resistance. This must often be done by cladding the entire beams by such as plasterboard.
  • a method of reducing some of the above mentioned disadvan­ages is to have the flooring structure bearing on the bottom flanges of the supporting beams.
  • the total floor­ing structure depth is thus reduced and ventilation and cable laying is simplified.
  • Fire protection of the beams is also simplified since only the bottom flange will be exposed to fire, while the inner parts of the beam remain cool,due to the surrounding concrete,against the effect of fire for a long time.
  • the required fire protection is normally accomplished by the bottom flanges of the beams being painted with fire protective (infumescent) paint.
  • a disadvantage with this implementation is that the structural height of the beam is limited by the depth of the floor structure. In certain cases this can mean dif­ficulties in achieving sufficient rigidity for long spans.
  • the greatest disadvantage is, however, the difficulty of erecting the flooring elements, since their ends must be thrust in between the flanges of the beam.
  • beams supporting flooring structures have been developed with a closed hollow section and laterally projecting bottom flanges.
  • the beams are fabricated by four plates being welded together with continuous welds.
  • a disadvantage with these beams is that they are more expensive in fabri­cation than rolled sections with the same weight or with the same load bearing capacity, inter alia due to fabri­cation requiring expensive special machines for welding.
  • a further development of this kind of beam is the one illustrated and described in the Swedish published speci­fication SE 448 897. This beam is fabricated by plates being welded to the toes of a rolled H-section beam.
  • the present invention has the object of achieving a pre­fabricated steel beam of the kind mentioned in the intro­duction, which dispenses with the above mentioned prob­lems by the implementation of the beam resulting in that sub­stantial static co-action with concrete is obtained, and that the implementation otherwise is such that the bottom flange does not need to be coated with fire protective paint, not even for very high fire resistance requirements.
  • a beam in accordance with the invention includes two mutually spaced rolled steel channels 1 with their toes mutually spaced
  • the webs 2 of the channels 1 form webs in this new beam section and from the aspect of material economy this achieves advantages compared with the beam according to SE 448 897, since the channel webs 2 are thinner than the flanges of the appropriate H-section.
  • the bottom flanges 3 of the channels 1 are welded to a bearing plate 4.
  • the means 6 may be such as small angled sec­tions or reinforcement bars, the spacing between them being determined by the loads to be transmitted.
  • the means 6 may be screws 6′, so-called studs projecting from or in the vicinity of the flanges 5 and fastened thereto e.g. by welding,the screws 6′ being schematically shown by dashed lines in Fig. 2.
  • a plate 7 is welded to either end of the beam, for transmitting the beam load to such as a column support.
  • the beam in accordance with the invention can be fabricated very simply, since ordinary automatic welding equipment can be used. As distinct from the other beams of hollow beam type described above, only two longitudinal welds are required instead of four.
  • the embodiment of the beam in accordance with the present invention is also favourable with regard to the effect of fire.
  • a substantial part of the carrying capacity is contributed by the bottom flanges 3 of the channels 1, and these flanges are protected by the bearing plate 4.
  • the bearing plate 4 is still a direct radiation protector for the flanges 3, and in combination with the cast concrete,which has great heat capacity,the temperature rise in the flanges 3 is slower than for the bottom flanges in conventional beams of the hollow box type. This condition, and that the cast concrete will take over an increasing part of the carrying capacity if there is a fire, ensures that the beam is given substantial fire resistance without the bearing plate 4 needing to be fire insulated at all.
  • An embodiment of the present invention for further in­creasing the carrying capacity and fire resistance is to arrange one or more reinforcement bars 11 in the beam cavity, as illustrated in Figure 4.
  • the bars 11 are fastened to the beam before the means 6 are welded in place and can suitably be suspended in these means.
  • the bars 11 are placed at a spacing from the bottom of the beam such that they are kept sufficiently cool for the required fire resistance time, simultaneously as the distance to the upper side of the beam is selected as being sufficiently large for giving an effective moment arm.
  • Reinforcement bars 12 can also be arranged in the vicinity of the upper flanges 5 of the channels 1, thereby to increase the steel area in the upper zone of the beam.
  • a still further embodiment of the beam in accordance with the present invention is illustrated in Figure 5 and can give extremely long fire resistance times.
  • a thin heat insulation layer 13 is arranged between the bearing plate 4 and the bottom flanges 3 of the channels 1. Although this insulation is thin, together with the high heat capacity of the cast concrete it gives a radical delay of the temperature rise in the bottom flanges 3 of the channels 1 when there is a fire, which has great importance for the carrying capacity of the beam and thereby its fire resistance.
  • FIG. 6 and 7 Another embodiment of the beam in accordance with the present invention is illustrated in Figures 6 and 7, where the reinforcement 11 is utilized for pre-stressing the beam, thus giving the beam camber.
  • Pre-stressing can be adjusted, for example, so that it compensates the deflec­tion caused by the own weight of the floor structure.
  • the pre-tension can be achieved, e.g. by a reinforcement bar 11 being made somewhat longer than the distance between the end plates 7 of the beam, the bar 11 being threaded at either end for nuts 14, the bar then being tensioned by the nuts between the end plates 7.
  • the latter can be provided with elongate slots 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Building Environments (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Peptides Or Proteins (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP88850148A 1987-05-11 1988-04-29 Mit Beton Zusammenwirkender feuerständiger Stahlträger Expired - Lifetime EP0292449B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88850148T ATE64974T1 (de) 1987-05-11 1988-04-29 Mit beton zusammenwirkender feuerstaendiger stahltraeger.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8701937A SE457364B (sv) 1987-05-11 1987-05-11 Brandmotstaandskraftig bjaelklagsbalk av staal i samverkan med betong
SE8701937 1987-05-11

Publications (3)

Publication Number Publication Date
EP0292449A2 true EP0292449A2 (de) 1988-11-23
EP0292449A3 EP0292449A3 (en) 1989-02-01
EP0292449B1 EP0292449B1 (de) 1991-07-03

Family

ID=20368481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88850148A Expired - Lifetime EP0292449B1 (de) 1987-05-11 1988-04-29 Mit Beton Zusammenwirkender feuerständiger Stahlträger

Country Status (7)

Country Link
EP (1) EP0292449B1 (de)
AT (1) ATE64974T1 (de)
DE (1) DE3863487D1 (de)
DK (1) DK164181C (de)
FI (1) FI86326C (de)
NO (1) NO167521C (de)
SE (1) SE457364B (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016169A1 (en) * 1993-01-13 1994-07-21 Deltatek Oy Prefabricated steel-concrete composite beam
WO1994019560A1 (en) * 1993-02-17 1994-09-01 Deltatek Oy Prefabricated steel-concrete composite beam
FR2718174A1 (fr) * 1994-03-30 1995-10-06 Laubeuf Profilé porteur à haute résistance thermique et agencement par exemple verrière comportant un tel profilé.
EP1278922A1 (de) * 2000-04-26 2003-01-29 Flex-Frame L.L.C Balkenkonstruktion mit assymetrischem fachwerk
KR100416877B1 (ko) * 2001-07-20 2004-01-31 한국건설기술연구원 개방형 단면을 갖는 철골보 및 이를 이용한 충복 내화형합성보 구조
EP1405961A1 (de) * 2002-10-05 2004-04-07 Dywidag-Systems International GmbH Stahl-Verbund-Konstruktion für Geschossdecken
EP1416101A1 (de) * 2002-10-31 2004-05-06 Tartuntamarkkinointi Oy Verbundträger
WO2004090253A1 (en) * 2003-04-10 2004-10-21 Teräspeikko Oy Steel beam
KR100477189B1 (ko) * 2002-09-04 2005-03-17 삼성중공업 주식회사 슬림플로어용 래티스보
EP1862606A1 (de) * 2006-05-29 2007-12-05 Anne Pieter Van Driesum Balken zum Stützen von Deckenelementen
KR100787133B1 (ko) 2007-02-15 2007-12-21 주식회사 하모니구조엔지니어링 콘크리트 충전용 조립식 박스형 철골보 및 이의 설치구조
CN103114680A (zh) * 2013-03-05 2013-05-22 江苏中宝钢构有限公司 J型钢及其应用
CN104264899A (zh) * 2014-10-17 2015-01-07 上海天华建筑设计有限公司 嵌入式外包u形钢-混凝土组合梁
IT201600078034A1 (it) * 2016-07-26 2018-01-26 Pasquale Impero Elemento in calcestruzzo armato, relativa trave in calcestruzzo armato e solaio in calcestruzzo armato
ES2681568A1 (es) * 2018-05-23 2018-09-13 Universitat Politècnica De València Viga plana con resistencia al fuego mejorada para forjados de acero-hormigón y su procedimiento de fabricación
US20180291626A1 (en) 2015-09-01 2018-10-11 Pfeifer Holding Gmbh & Co. Kg Supporting beam for ceiling systems, ceiling system and method for the production thereof

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU87137A1 (fr) * 1988-02-19 1989-09-20 Arbed Poutre mixte noyee dans le plancher
EP0432177B1 (de) * 1988-07-29 1993-06-09 Suomen Liittopalkki Oy System mit einem verbindungsleiter und mit einer verbindungsplatte
FI85745C (fi) * 1989-04-13 1993-02-23 Peikkorakenne Oy Brandsaeker prefabricerad staolbalk
SE466609B (sv) * 1989-06-15 1992-03-09 Joergen Thor Anordning vid en samverkanbalk
FR2718173B1 (fr) * 1994-03-30 1996-05-15 Laubeuf Profilé porteur stable au feu, par exemple pour verrière et agencement comprenant un tel profilé.
DE102018212750A1 (de) * 2018-07-31 2020-02-06 Pfeifer Holding Gmbh & Co. Kg Tragbalken für Deckensysteme, Deckensystem und Verfahren zu deren Herstellung
SE543184C2 (sv) * 2019-02-14 2020-10-20 Vaestsvenska Staalkonstruktioner Ab Brandsäker bjälklagsbalk av stål med vertikala liv, horisontella flänsar och ett värmeisolerande material i ett utrymme mellan flänsarna

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957176A (en) * 1930-08-09 1934-05-01 Ferrocon Corp Beam construction
CH188563A (de) * 1936-02-26 1937-01-15 Isele Suter Oscar Raumabschliessende Konstruktion.
US2731824A (en) * 1956-01-24 hadley
DE1016427B (de) * 1948-12-27 1957-09-26 Carl Abraham Forssell Verfahren zum Kaltstrecken von Beton-Bewehrungseinlagen
US4333285A (en) * 1977-01-20 1982-06-08 Kajima Kensetsu Kabushiki Kaisha Building structure
DE3525934A1 (de) * 1984-07-19 1986-01-30 Josef Steyr Feichtmayr Langgestrecktes traegerelement fuer tragkonstruktionen und mit solchen traegerelementen hergestellte decke
EP0189785A2 (de) * 1985-02-01 1986-08-06 Arbed S.A. Riegel-Stützenanschluss

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731824A (en) * 1956-01-24 hadley
US1957176A (en) * 1930-08-09 1934-05-01 Ferrocon Corp Beam construction
CH188563A (de) * 1936-02-26 1937-01-15 Isele Suter Oscar Raumabschliessende Konstruktion.
DE1016427B (de) * 1948-12-27 1957-09-26 Carl Abraham Forssell Verfahren zum Kaltstrecken von Beton-Bewehrungseinlagen
US4333285A (en) * 1977-01-20 1982-06-08 Kajima Kensetsu Kabushiki Kaisha Building structure
DE3525934A1 (de) * 1984-07-19 1986-01-30 Josef Steyr Feichtmayr Langgestrecktes traegerelement fuer tragkonstruktionen und mit solchen traegerelementen hergestellte decke
EP0189785A2 (de) * 1985-02-01 1986-08-06 Arbed S.A. Riegel-Stützenanschluss

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TECHNISCHE MITTEILUNGEN KRUPP.FORSCHUNGSBERICHTE, vol. 39, no. 3, December 1981, pages 87-110, Essen, DE; E. REYER: "Ausführungsalternativen in Stahl bei Skelettkonstruktionen mit Betondecken" *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016169A1 (en) * 1993-01-13 1994-07-21 Deltatek Oy Prefabricated steel-concrete composite beam
WO1994019560A1 (en) * 1993-02-17 1994-09-01 Deltatek Oy Prefabricated steel-concrete composite beam
FR2718174A1 (fr) * 1994-03-30 1995-10-06 Laubeuf Profilé porteur à haute résistance thermique et agencement par exemple verrière comportant un tel profilé.
EP0676513A1 (de) * 1994-03-30 1995-10-11 Laubeuf S.A. Thermisch hochbelastbares Trageprofil und Anordnung umfassend desselben, z.B. Glaswand
EP1278922A1 (de) * 2000-04-26 2003-01-29 Flex-Frame L.L.C Balkenkonstruktion mit assymetrischem fachwerk
EP1278922A4 (de) * 2000-04-26 2007-01-03 Girder Slab Technologies Llc Balkenkonstruktion mit assymetrischem fachwerk
KR100416877B1 (ko) * 2001-07-20 2004-01-31 한국건설기술연구원 개방형 단면을 갖는 철골보 및 이를 이용한 충복 내화형합성보 구조
KR100477189B1 (ko) * 2002-09-04 2005-03-17 삼성중공업 주식회사 슬림플로어용 래티스보
EP1405961A1 (de) * 2002-10-05 2004-04-07 Dywidag-Systems International GmbH Stahl-Verbund-Konstruktion für Geschossdecken
EP1416101A1 (de) * 2002-10-31 2004-05-06 Tartuntamarkkinointi Oy Verbundträger
WO2004090253A1 (en) * 2003-04-10 2004-10-21 Teräspeikko Oy Steel beam
EP1862606A1 (de) * 2006-05-29 2007-12-05 Anne Pieter Van Driesum Balken zum Stützen von Deckenelementen
KR100787133B1 (ko) 2007-02-15 2007-12-21 주식회사 하모니구조엔지니어링 콘크리트 충전용 조립식 박스형 철골보 및 이의 설치구조
CN103114680A (zh) * 2013-03-05 2013-05-22 江苏中宝钢构有限公司 J型钢及其应用
CN103114680B (zh) * 2013-03-05 2015-10-21 江苏中宝钢构有限公司 用于房屋钢结构上的j型钢
CN104264899A (zh) * 2014-10-17 2015-01-07 上海天华建筑设计有限公司 嵌入式外包u形钢-混凝土组合梁
CN104264899B (zh) * 2014-10-17 2016-05-11 上海天华建筑设计有限公司 嵌入式外包u形钢-混凝土组合梁
US20180291626A1 (en) 2015-09-01 2018-10-11 Pfeifer Holding Gmbh & Co. Kg Supporting beam for ceiling systems, ceiling system and method for the production thereof
US10407910B2 (en) 2015-09-01 2019-09-10 Pfeifer Holding Gmbh & Co. Kg Supporting beam for slab systems, slab system and method for the production thereof
EP3344823B1 (de) 2015-09-01 2021-03-03 Pfeifer Holding GmbH & Co. KG Tragbalken für deckensysteme, deckensystem und verfahren zu dessen herstellung
IT201600078034A1 (it) * 2016-07-26 2018-01-26 Pasquale Impero Elemento in calcestruzzo armato, relativa trave in calcestruzzo armato e solaio in calcestruzzo armato
WO2018020407A1 (en) * 2016-07-26 2018-02-01 Pasquale Impero Reinforced concrete element, beam and floor
ES2681568A1 (es) * 2018-05-23 2018-09-13 Universitat Politècnica De València Viga plana con resistencia al fuego mejorada para forjados de acero-hormigón y su procedimiento de fabricación
ES2732719A1 (es) * 2018-05-23 2019-11-25 Univ Valencia Politecnica Viga plana con resistencia al fuego mejorada para forjados de acero-hormigon y su procedimiento de fabricacion

Also Published As

Publication number Publication date
DK164181B (da) 1992-05-18
FI882186A0 (fi) 1988-05-10
DE3863487D1 (de) 1991-08-08
EP0292449A3 (en) 1989-02-01
NO882044L (no) 1988-11-14
NO167521C (no) 1991-11-13
DK256388A (da) 1988-11-12
SE8701937D0 (sv) 1987-05-11
FI86326C (fi) 1992-08-10
NO882044D0 (no) 1988-05-10
SE8701937L (de) 1988-11-12
NO167521B (no) 1991-08-05
FI86326B (fi) 1992-04-30
ATE64974T1 (de) 1991-07-15
EP0292449B1 (de) 1991-07-03
FI882186A (fi) 1988-11-12
DK256388D0 (da) 1988-05-10
SE457364B (sv) 1988-12-19
DK164181C (da) 1992-10-12

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