EP2412887A1 - Profilierter Stahlboden - Google Patents

Profilierter Stahlboden Download PDF

Info

Publication number
EP2412887A1
EP2412887A1 EP11008078A EP11008078A EP2412887A1 EP 2412887 A1 EP2412887 A1 EP 2412887A1 EP 11008078 A EP11008078 A EP 11008078A EP 11008078 A EP11008078 A EP 11008078A EP 2412887 A1 EP2412887 A1 EP 2412887A1
Authority
EP
European Patent Office
Prior art keywords
deck
crest
stiffener
profiled
crests
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.)
Withdrawn
Application number
EP11008078A
Other languages
English (en)
French (fr)
Inventor
Derek Leonard Mullett
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.)
Composite Metal Flooring Ltd
Original Assignee
Composite Metal Flooring Ltd
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 Composite Metal Flooring Ltd filed Critical Composite Metal Flooring Ltd
Publication of EP2412887A1 publication Critical patent/EP2412887A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
    • E04B5/40—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs

Definitions

  • This invention relates to a profiled steel deck inter-alia for inclusion in flooring which comprises a composite of the steel deck and a concrete layer which traditionally contains a steel mesh, reinforcing bars, and/or metallic/plastics fibres. More especially the invention relates to a cold-rolled profiled steel deck which, in use, receives a layer of poured concrete to produce a steel/concrete composite floor panel, and to a composite floor panel which includes a profiled steel deck bonded to a layer of concrete.
  • Profiled steel decks for use inter-alia as components of steel/concrete composite floor panels are used widely in the building industry.
  • cold-formed steel decks can be found in GB1361448 , US4453364 , US4675238 , US5056348 and GB2397074 .
  • conventionally cold-formed steel decks comprise one or more crests and troughs separated by inclined webs. The crests, webs and troughs extend over the full span of the deck with the open sides of the deck extending across the deck width.
  • the span of a deck is of the order of 3 to 5 metres and the width is generally between 500mm and 1000mm.
  • a steel gauge of between 0.75 and 1.2mm is employed.
  • the methodology for the design of cold-formed thin gauge steel decks differs from that for the design of general structural steelwork (for members in bending) in terms of bending stress.
  • structural steelwork the bending stresses are reduced whereas in cold-formed section design, the yield stress of the steel remains unchanged but the individual elements which make up the profile are reduced in area.
  • Stiffeners are used to improve the stiffness of a crest or trough of a profiled deck and to enhance the shear bond characteristics of the concrete and steel components of a deck.
  • the elemental compression widths of stiffeners have been small when compared with the elemental compression widths of the respective crests and troughs.
  • One object of this invention is to provide a cold-rolled steel deck which is fully effective, or substantially so, and which provides a highly effective shear bond with the concrete layer of the composite floor panel.
  • This objective is essentially achieved by significantly reducing the elemental compression width of the deck.
  • elemental compression width is meant the combined width of those parts of the deck which are in compression in use of the deck. These parts are essentially the flat areas of the crests, stiffeners and the troughs of the deck.
  • each crest has an elemental compression width which is equal to the distance between the points of intersection of the webs and the crests and the flat elements) of the crest.
  • each stiffener has an elemental compression width.
  • a point of intersection is the point at which a web, if extended, would interest the crest, if extended.
  • the elemental compression width of a stiffener is the distance between the points of intersection of the sides of the stiffener and the flat surface of the stiffener. Again, the points of intersection are the points at which the flat surface, if extended, would intersect the stiffener sides, if extended.
  • the invention provides a profiled deck roll-formed from a steel sheet to define at least one pair of crests, a stiffener upstanding from the surface of each crest, a trough positioned between each pair of crests, and inclined webs extending between the sides of the trough and the neighbouring sides of the crests, the profiled deck being characterised in that the elemental compression width of each crest is no more than four times the elemental compression width of the respective stiffener.
  • the elemental compression width of each crest is no more than 3.5 times that of the elemental compression width of the stiffener upstanding from its surface. In a further preferred embodiment the elemental compression width of each crest is no more than that of the elemental compression width of the stiffener.
  • the elemental compression width of each crest is between 1.5 and 3.5 times the elemental compression width of the stiffener upstanding from its surface.
  • each web and crest define a corner having a smooth curvilinear profile.
  • the radius of each curvilinear corner is between 33mm and 40mm.
  • the crests and troughs of the first four documents are generally flat with the corners between the crests and the inclined webs defined by sharp angles.
  • the bend radii of these and similar profiled steel decks are small, generally no more than between 5mm and 10mm. A consequence of such a bend radius is that the elemental compression width of each crest is relatively large leading to low deck inertia.
  • the surfaces of the crests of the decks disclosed in these four documents are generally planar or are formed with channels extending along the span of the deck.
  • Planar deck surfaces having no stiffeners have significantly reduced stiffness and shear bond characteristics.
  • the presence of spanwise extending channels marginally increases the deck stiffness but does not provide any or at best a limited increase in shear bond properties.
  • Document GB2397074 discloses a profiled deck roll-formed from a steel sheet according to the preamble of claim 1.
  • GB2397074 also discloses a profiled steel deck in which the corners between the webs and the crests are curved to define corners having a bend radius of between a minimum of 15mm and a maximum of 30mm.
  • each crest is formed with an upstanding stiffener and two channels extending along the span of the deck.
  • the elemental compression width of each such crest is approximately 6.5 times the elemental compression width of the respective stiffener.
  • profiled decks as disclosed in GB2397074 will perform better than the decks disclosed in the other four documents, profiled decks as disclosed in GB2397074 suffer from certain features which adversely affect their performance. Essentially these features include relatively large elemental compression widths caused by a smaller than necessary bend radii, and relatively short crest stiffeners.
  • the initial purpose of the bend radii of a profiled deck is to link the crests of the deck to the adjoining inclined webs. This function is achieved by corners having small or larger bend radii.
  • the size of the bend radii affects the performance of a profiled steel deck under compression.
  • the crests of a profiled deck under simple and continuous construction define the major parts of the profile under compression.
  • To minimise the elemental compression widths of the crests is therefore important. This is because these elemental widths have a direct function of the crests' ability to act in compression. In other words, the shorter the elemental compression width of a deck element, the better it will perform in use.
  • the Applicant has also established that a larger than normal bend radius which effectively shortens the elemental compression width of each crest of the deck increases the vertical shear/buckling capacity of the web.
  • the bend radii of the profiled decks disclosed in GB1361448 , US4453364 , US4675238 and US5056348 are minimal.
  • the crests will, therefore, perform poorly under compression.
  • the bend radius of the profiled deck disclosed in GB2397074 is higher with subsequent increases in performance under compression.
  • the elemental compression widths of the crests and the troughs are still large leading to a reduced ability to act efficiently under compression and a lower web vertical shear and buckling capacity.
  • profiled steel decks in accordance with this invention exhibit significantly enhanced ability to act under compression by providing reductions in the elemental compression widths of the elements of the profiled deck and increases in the vertical shear and buckling capacity.
  • a deck in accordance with the present invention which is fully effective and has reduced elemental compression lengths will span greater distances when compared with presently available decks as exemplified by GB 1361448 , US4453364 , US4675238 , US5056348 and GB2397074 which have deck profiles which are not fully effective.
  • Applicant has established that a deck in accordance with this invention will, for a given steel gauge, provide increases in span length in excess of 10%. Any increase in span length results in a reduced requirement for structural steelwork and consequent significant build cost savings.
  • each crest of the profiled deck disclosed in GB2397074 is formed with an upstanding stiffener.
  • the effective width of each such stiffener is relatively small, that is to say about 16% of the crest width between its radiussed corners. Applicant has established that, surprisingly, by increasing the compression width of each stiffener the inertia of the profile is improved leading to improvements in the performance of the deck under construction and in use.
  • a profiled deck in accordance with this invention will not only span greater distances when compared with the other known decks but also has the potential of reducing gauge thickness of the steel sheet from which the deck is roll formed. In practise, an achievable reduction in gauge thickness from, say, 1.2mm to 1.00mm can provide a cost saving circa 15 to 20%. Further gauge reductions to 0.75mm and below are possible with a deck profile in accordance with this invention.
  • a profiled steel deck in accordance with this invention will use less props in the floor construction stage because of its greater vertical shear capacity and bending resistance leading to further cost savings.
  • the profile of a deck in accordance with the invention is produced by subjecting a suitably sized normally rectangular sheet of steel cut from a coil to a cold forming process. In this process the sheet is passed between a series of forming rolls whose rolling surfaces are shaped to impose on the sheet the required profile.
  • the gauge of the steel to be roll formed is between 0.75 and 1.2mm, although other steel gauges may be employed.
  • the steel is preferably galvanised and may be coated with a textured polyester film for protective purposes.
  • the profiled deck has two generally parallel crests 2 which extend along the span of the deck, a trough 4, end laps 6 and webs 8 which join the trough and the end laps to the crests.
  • Each end lap terminates in either a male 10 or female interlock 12.
  • the interlocks co-operate with those of neighbouring decks to create the required span of floor to be covered.
  • the width of the profiled deck is typically 600mm or 800mm.
  • Each web and crest is linked by a corner 14 having a smooth curvilinear profile whose radius is at least 33mm.
  • the radius should not exceed 40mm to prevent profile instabilities being generated.
  • a corner radius of 34mm is preferred and is shown in the drawings.
  • a curvilinear profile increases the bending capacity of the deck and adds strength particularly in the corners 14 between the crests 2 and the neighbouring webs 8 to inhibit failures which can occur with more conventional profiled decks.
  • each stiffener 16 Upstanding from the upper surface of each crest is a stiffener 16.
  • Each stiffener 16 has re-entrant side walls 18 and a generally planar upper surface 20.
  • the re-entrant shaping of the side walls adds to the shear bond capacity of the profiled deck and enhances, the ability of the deck to bond effectively with the poured concrete layer when under compression.
  • the stiffeners are produced during the roll forming process and add substantially to the stiffness of the deck and also define shear connectors between the steel deck and the concrete layer which is poured over the upper surface of the deck during construction.
  • the re-entrant sides of each stiffener allow hangers to be supported from the stiffener interiors. As will be seen from the drawings, the corners between each stiffener and the adjoining crest surface are curvilinear.
  • each stiffener 16 Projecting from the upper surface of each stiffener 16 is a linear array of embossments 22. These can be seen more clearly in Figure 5 . As shown, the embossments are generally of square shape with rounded corners. Typically the embossments are 25mm across and are spaced apart by 50mm. The embossments add stiffness and shear bond capacity.
  • the size of each stiffener 16 is larger than that found in conventional profiled decks to improve the inertia of the profile and reduce the elemental length of each crest adjacent to the respective stiffener.
  • the elemental compression width L2 of the upper surface of each stiffener is between one quarter and one third of the elemental compression width LI of the respective crest.
  • the ratio of the elemental compression width of each crest and that of each stiffener of a deck in accordance with this invention is between 4 to 1 and 1 to 0.5 to 1.
  • deck stiffness reduces deck deflections in the composite floor construction stage. Reductions in deck deflection reduce the levels of ponding during concrete pouring and provide commensurate reductions in the required volume of concrete with consequent savings in build costs.
  • each web 8 is formed with two vertically spaced linear rows 26, 28 of outwardly projecting embossments 30.
  • Each embossment is generally circular in plan and the radius of the embossments of the lower row 26 is typically 4mm and that of the embossments of the upper row 28 is typically 5.2mm.
  • the spacing between the centres of neighbouring embossments of each row is typically 34mm and that between the centres of the two rows is typically 36.3mm.
  • the embossments of the upper row 28 are displaced linearly with respect to those of the lower row whereby each upper embossment is positioned above a land portion of the respective web.
  • the embossment rows 26, 28 extend along the entire span of the webs 8 and assist bonding of the steel profile and the poured concrete during production of the composite floor panel.
  • the trough 4 is formed with two upstanding ribs 32,34 separated by a plane surfaced land 36 through which shear stud connectors can pass to connect the steel web to supporting beams or the like prior to concrete pouring.
  • the shape of alternative ribs can be seen from Figures 6 and 7 .
  • Each end lap 6 is formed with either a male or female interlock 10,12.
  • the interlocks extend along the entire length of the deck and enable two or more decks to be joined as shown in Figure 8 to produce a deck of any required width.
  • a steel deck in accordance with the invention is positioned on supports above the floor area to be covered and joined through its interlocks to produce the required floor panel area. Concrete is then poured in situ over the deck and allowed to set. The profile of the deck promotes an efficient bond to the concrete and the profile inertia during pouring ensures low ponding of the concrete.
  • a profiled deck roll-formed from a steel sheet to define at least one pair of crests (2), a stiffener (16) upstanding from the surface of each crest, a trough (6) positioned between the or each pair of crests, and inclined webs (8) extending between the sides of the trough and the neighbouring sides of the crests, the boundary between each web and crest defining a corner (14) having a smooth curvilinear profile, the profiled deck being characterised in that the elemental compression width of each crest (2) is no more than four times the elemental compression width of the respective stiffener (16), and that the radius of each curvilinear corner (14) is not less than 33mm.
  • Preferred features described herein include the elemental compression width of each crest (2) being no more than 3.5 times that of the elemental compression width of the stiffener (16) upstanding from its surface.
  • the elemental compression width of each crest (2) may be no more than 2.5 times that of the elemental compression width of the stiffener (16).
  • the elemental compression width of each crest (2) may be between 1.5 and 3.5 times the elemental compression width of the stiffener (16) upstanding from its surface.
  • the radius of each curvilinear corner (14) may be between 33mm and 40mm.
  • each stiffener (16) may be reentrant.
  • the or each trough (6) may include one or more stiffeners (32) upstanding from its surface.
  • stiffeners (32) are provided, they may be positioned substantially equidistant from the neighbouring web (8).
  • a composite floor panel comprising a profiled deck roll-formed from a steel sheet to define at least one pair of crests (2), a stiffener (16) upstanding from the surface of each crest (2), a trough (6) positioned between each pair of crests, and inclined webs (8) extending between the sides of the trough (6) and the neighbouring sides of the crests (2), and a layer of concrete bonded to the surface of the deck, the floor panel being characterised in that the elemental compression width of each crest (2) is no more than four times the elemental compression width of the respective stiffener (16).

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Floor Finish (AREA)
  • Heat Treatment Of Articles (AREA)
  • Metal Rolling (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP11008078A 2008-03-25 2008-09-08 Profilierter Stahlboden Withdrawn EP2412887A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0805387.8A GB0805387D0 (en) 2008-03-25 2008-03-25 Profiled steel floor panel
GBGB0815913.9A GB0815913D0 (en) 2008-03-25 2008-09-02 Profiled steel deck
EP08806206A EP2268869B1 (de) 2008-03-25 2008-09-08 Profilstahldeck

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP08806206.2 Division 2008-09-08

Publications (1)

Publication Number Publication Date
EP2412887A1 true EP2412887A1 (de) 2012-02-01

Family

ID=39386684

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11008078A Withdrawn EP2412887A1 (de) 2008-03-25 2008-09-08 Profilierter Stahlboden
EP08806206A Not-in-force EP2268869B1 (de) 2008-03-25 2008-09-08 Profilstahldeck

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08806206A Not-in-force EP2268869B1 (de) 2008-03-25 2008-09-08 Profilstahldeck

Country Status (8)

Country Link
US (1) US20110047933A1 (de)
EP (2) EP2412887A1 (de)
AT (1) ATE533901T1 (de)
AU (1) AU2008353334A1 (de)
CA (1) CA2717203A1 (de)
GB (2) GB0805387D0 (de)
NZ (1) NZ587727A (de)
WO (1) WO2009118498A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011100633A1 (de) * 2011-05-05 2012-11-08 Pilepro Llc Verfahren zur Herstellung eines Stahlprofils

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1361448A (en) 1970-09-04 1974-07-24 Prins Nv Profiled floor plate and a floor including conc'ete poured into the plate
US4453364A (en) 1980-05-27 1984-06-12 Ting Raymond M L Corrugated steel decking section
US4675238A (en) 1984-06-06 1987-06-23 Roll Form Products, Inc. Metal decking
GB2195680A (en) * 1986-11-27 1988-04-13 Quikspan Construction Limited Corrugated sheet decking with concrete bonding projections
US5056348A (en) 1989-06-01 1991-10-15 Robertson-Ceco Corporation Method of making a profiled sheet metal building unit
EP0480592A1 (de) * 1990-10-11 1992-04-15 Precision Metal Forming Limited Verbesserungen an Tafelprofilen für Verbunddecken
WO1997030240A1 (en) * 1996-02-15 1997-08-21 British Steel Plc Floor and ceiling structures
GB2397074A (en) 2003-01-07 2004-07-14 Corus Uk Ltd Profiled steel decking

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA919883A (en) * 1968-05-28 1973-01-30 D. Elizalde Eduardo Corrugated sheet elements
DE2057372A1 (de) * 1970-11-21 1972-07-06 Silberkuhl Wilhelm Johannes Di Ebenes Flaechentragwerk
GB1585471A (en) * 1976-08-27 1981-03-04 Redpath Dorman Long Ltd Composite decks
CA1110818A (en) * 1980-02-07 1981-10-20 Maurice Lacasse Corrugated metal building structural unit
US4726159A (en) * 1984-07-02 1988-02-23 Consolidated Systems, Inc. Composite metal/concrete floor and method
US4962622A (en) * 1989-06-01 1990-10-16 H. H. Robertson Company Profiled sheet metal building unit and method for making the same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1361448A (en) 1970-09-04 1974-07-24 Prins Nv Profiled floor plate and a floor including conc'ete poured into the plate
US4453364A (en) 1980-05-27 1984-06-12 Ting Raymond M L Corrugated steel decking section
US4675238A (en) 1984-06-06 1987-06-23 Roll Form Products, Inc. Metal decking
GB2195680A (en) * 1986-11-27 1988-04-13 Quikspan Construction Limited Corrugated sheet decking with concrete bonding projections
US5056348A (en) 1989-06-01 1991-10-15 Robertson-Ceco Corporation Method of making a profiled sheet metal building unit
EP0480592A1 (de) * 1990-10-11 1992-04-15 Precision Metal Forming Limited Verbesserungen an Tafelprofilen für Verbunddecken
WO1997030240A1 (en) * 1996-02-15 1997-08-21 British Steel Plc Floor and ceiling structures
GB2397074A (en) 2003-01-07 2004-07-14 Corus Uk Ltd Profiled steel decking

Also Published As

Publication number Publication date
ATE533901T1 (de) 2011-12-15
EP2268869A1 (de) 2011-01-05
AU2008353334A1 (en) 2009-10-01
WO2009118498A1 (en) 2009-10-01
GB0805387D0 (en) 2008-04-30
CA2717203A1 (en) 2009-10-01
GB0815913D0 (en) 2008-10-08
EP2268869B1 (de) 2011-11-16
NZ587727A (en) 2012-02-24
US20110047933A1 (en) 2011-03-03

Similar Documents

Publication Publication Date Title
TWI444525B (zh) 單條單板ｔ型柵條
JPH0321750A (ja) 金属薄板を成形した建築用ユニット及びその製造方法
AU668975B2 (en) Composition construction with armoured concrete
US20060179750A1 (en) Composite beam
US20070000197A1 (en) Structural decking system
EP1633937B1 (de) Verbundelement, insbesondere zum herstellen von wandstrukturen für gebäude und verfahren zur herstellung
AU2004203734B2 (en) Profiled steel decking
EP2268869B1 (de) Profilstahldeck
AU2003229379B2 (en) Reinforced structural steel decking
WO1996023939A1 (en) Improved c-section structural member
CN115748999A (zh) 一种双层翼缘的檩条及其制备方法
JP2012127100A (ja) デッキプレート
GB2306526A (en) Floor decking
KR20130065667A (ko) 철근트러스 일체형 합성 데크플레이트 및 그 제조방법
KR102656176B1 (ko) H빔을 이용한 t형유닛과 강판의 빌트업 합성기둥과 합성보와 결합된 층고 절감형 합성구조 시스템
KR101371197B1 (ko) 응력변화에 대응한 하이브리드 경량 철구조물의 제작방법
JP6892010B1 (ja) 合成梁
JP7380627B2 (ja) 鉄骨梁、柱梁接合構造およびこれを有する構造物
KR200294416Y1 (ko) 보강재를구비하고초기인장력이가해진스틸스터드
KR20090068525A (ko) 교량 구조물
AU2016204743A1 (en) A structural decking sheet
AU2004206038B2 (en) Structural decking system
AU690808B2 (en) Improved C-section structural member
KR20230079815A (ko) H빔을 이용한 유공웨브가 있는 t형유닛과 데크지지용 하부플랜지 강판이 결합된 슬림플로어 빌트업 합성보 시스템
JPH0451241B2 (de)

Legal Events

Date Code Title Description
AC Divisional application: reference to earlier application

Ref document number: 2268869

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20120802