EP2678491B1 - Roof girder and premanufactured roof plate element with roof girders - Google Patents
Roof girder and premanufactured roof plate element with roof girders Download PDFInfo
- Publication number
- EP2678491B1 EP2678491B1 EP20120714553 EP12714553A EP2678491B1 EP 2678491 B1 EP2678491 B1 EP 2678491B1 EP 20120714553 EP20120714553 EP 20120714553 EP 12714553 A EP12714553 A EP 12714553A EP 2678491 B1 EP2678491 B1 EP 2678491B1
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- EP
- European Patent Office
- Prior art keywords
- roof
- plates
- sides
- metal
- roof girder
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/20—Roofs consisting of self-supporting slabs, e.g. able to be loaded
- E04B7/22—Roofs consisting of self-supporting slabs, e.g. able to be loaded the slabs having insulating properties, e.g. laminated with layers of insulating 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
- E04C3/04—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
- E04C3/09—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 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
-
- 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
-
- 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
- E04C2003/0486—Truss like structures composed of separate truss elements
- E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces
Definitions
- the present invention concerns a roof girder of the kind indicated in the introduction of claim 1.
- the invention also concerns a prefabricated roof plate element with one or more roof girders according to the invention.
- Prefabricated roof girders and roof plate elements, respectively, of this kind can be made of 100% inorganic materials which is very significant to durability and maintenance. Besides, it is of great significance that the roof plate elements in question can have a free span of up to 22 metres, i.e. one single roof plate element may cover about 80 m 2 , which of course is very essential with regard to reducing the construction time.
- EP 2 145 056 A1 ( WO2008/125109A1 ) describes a prefabricated roof plate element, including one or more longitudinal box-shaped roof girders that each consists of two predominantly U-shaped metal sections which at mutually facing, open sides are interconnected along narrow outwards bent lateral edges, the roof girders being connected at upper and lower narrow sides corrugated in longitudinal direction with metal plates corrugated in transverse direction and having approximately the same width as the roof plate element, the roof girders/support girders and roof plate element, respectively, designed with reduced height at an end part intended to form eaves.
- WO 02/092937 A1 discloses a method of handling and joining at least two sectional steel elements together to form a load-bearing beam element, preferably for interaction with a separately-formed post footing, a beam element made from at least two sectional elements, and a beam element/post footing combination.
- the method being characterised in that detached angle section elements are joined together to form a hollow sectional beam, and that at least one sleeve plate is externally attached around the hollow sectional beam thus obtained and is locked to this forming stop for receiving preferably board-shaped elements.
- the roof girder according to the invention is peculiar in that the metal sections at the lower and lower open sides, respectively, are interconnected by means of a plurality of connecting plates which are fastened to inner, substantially vertical sides of the metal sections in such a way that there is a spacing between the narrow outwardly bent edges of respective lower and upper metal sections; that the cavity is filled with insulation material; and that the plurality of connection plates are provided at different positions along the rood girder.
- the roof girder invention in a simple way is provided the required space for additional layers of insulating material in order to fulfil the raised requirements to insulation, i.e. meet the current standards of the building regulation to reduced ⁇ - and U-values (coefficient of thermal conductivity and thermal conductivity, respectively), which particularly is due the fact that the thermal bridge known from prior art roof girders is effectively counteracted in that the metal sections are not directly connected with each other.
- the roof girder according to the invention may at the same time be provided a significantly increased span of up to more than 24 metres in that the spacing between the narrow outwardly bent edges amount to 50-500 mm, preferably 100-200 mm.
- the spacing between the narrow outwardly bent edges amount to 50-500 mm, preferably 100-200 mm.
- a roof girder according to the invention may advantageously be designed such that a lower of the U-shaped metal sections is shorter than an upper of the U-shaped metal sections, and that the upper U-shaped section is closed downwards at a projecting end part intended to form eaves in a roof plate element by means of a preferably U-shaped metal section, which is disposed internally of the upper U-shaped metal section and fastened to the latter.
- the roof girder according to the invention may suitably be designed such that the connecting plates are constituted by prefabricated units, the width of which adapted to the internal width of the U-shaped metal sections, and the height and length of which varying in dependence on the height of the roof girder and the actual longitudinal disposition of the units in the roof girder.
- the roof girder according to the invention can be designed such that the prefabricated units are constituted by box-shaped units having a core of mineral wool or insulating foam, where the core is connected at opposing outer sides by metal plates with low thermal conductivity (U-value), the metal plates preferably externally being covered with an insulating layer of e.g. so-called integral foam ( Figs. 7 and 8 ).
- U-value thermal conductivity
- the roof girder according to the invention can be designed such that the prefabricated units are constituted by box-shaped units with opposing outer sides and transverse sides consisting of fibre-reinforced construction plates or composite plates, and which have a core of mineral wool or insulating foam ( Figs. 9 and 10 ).
- the roof girder according to the invention can be designed such that the prefabricated units are constituted by box-shaped units with opposing outer sides and transverse sides consisting of fibre-reinforced construction plates or composite plates, and which have a core of mineral wool or insulating foam, the outer sides further provided with upper and lower metal plates disposed with vertical spacing ( Figs. 11 and 12 ).
- the roof girder according to the invention can be designed such that the connecting plates are constituted by connecting plates of metal or composite plates with low thermal conductivity (U-value) adapted to be connected with opposing vertical inner sides of the upper and lower U-shaped metal sections, and in the form of a transverse connecting partitioning integrated with the connecting plates.
- U-value thermal conductivity
- the invention additionally concerns a roof plate element of the kind indicated in the preamble of claim 9, the roof plate element being peculiar in that it includes an upper connection between the longitudinal roof girders, the connection consisting of a construction plate of inorganic and non-flammable material, a trapezoidal steel sheet or a sandwich panel, a layer of compression-resistant insulation, an upper roof membrane and an underside lining of laths and insulating plates.
- the underlining consists of trapezoidal sheets of steel or light-alloy metal, the sheets optionally including suitable insets of insulating material.
- the underlining may alternatively consist of ceiling boards of non-flammable, inorganic construction plates.
- the roof girders and the roof plate elements can be made with heights adapted to span and loads. According to the invention, it is possible to produce roof girders and roof plate elements with built-in slope to one or two sides ( Figs. 23 and 24 ), implying a very great cost-saving as the roof slope is not to be built up on the construction site.
- roof girders and roof plate elements according to the invention all fulfil current standards for environmental sustainability and CO 2 -saving, which is particularly due to the much prolonged service life because of the use of inorganic materials.
- the use of steel sections as load-bearing elements rather than e.g. laminated wood also gives a much increased service lift in addition to increased span.
- girders and elements according to the invention can advantageously be used as façade covering and as storey partitionings with a span up to even 15 metres.
- Figs. 1 and 2 show sectional views of an embodiment of a roof plate element 2 according to the invention where side eaves 6 are established at a side of the roof plate element 2, as an outer protruding part 4 of the roof plate element 2 has reduced thickness which is produced by means of insert girders 5 supporting the upper extended part of the roofing, and which are inserted at the side of the roof plate element 2 and disposed in an interspace between upper reversed U-shaped metal sections 8 and lower U-shaped metal sections 10.
- the upper and lower metal sections 8, 10 are not interconnected at the mutually facing narrow outwardly bent edges 14, 16.
- the narrow outwardly bent edges 14, 16 have a vertical spacing A
- roof girders 12 with increased height and thereby increased bending stiffness are thereby provided.
- the spacing A can vary between 50 and 500 mm, preferably between 100 and 200 mm.
- interspace 7 established between the metal sections 8, 10 provide for passing e.g. electric installations through tubes 9 provided in the interspace 7 ( Fig. 2 ).
- the mechanical assembly between vertical inner sides of upper and lower metal sections 8, 10 takes place by means of the connecting plates shown in Figs. 7 - 12 , 14 and 16 -19 , where each will be explained separately in detail in the following.
- the required space for additional layers of insulating material is provided in order to fulfil the raised requirements to insulation, i.e. meet the current standards of the building regulation to reduced ⁇ - and U-values (coefficient of thermal conductivity and thermal conductivity, respectively).
- Figs. 1 - 6 show prefabricated roof plate elements 2 including one or more longitudinal roof girders 12 which are placed along opposing sides and at the centre between the opposing sides of the roof plate element 2 which includes an upper mechanical connection 18 between the longitudinal roof girders 12, the mechanical connection 18 consisting of a construction plate of inorganic and non-flammable material, a trapezoidal steel sheet or a sandwich panel, a layer of compression-resistant insulation 20, an upper roof membrane 22 and an underside lining 24 of laths 26 and insulating plates 30.
- the underlining 24 may consist of trapezoidal sheets 32 of steel or light-alloy metal and possibly insulation integrated in the trapezoidal sheets.
- roof girders 12 and roof plate elements 2 are filled with suitable insulation which, as most clearly shown in Figs. 1, 2, 3 and 5 , provide that the longitudinal spacing A between the metal sections 8, 10 can get additional insulation, the thickness of which as spacing A can vary between 50 and 200 mm.
- the situation will be as follows by a roof girder 12 and a roof plate element 2, respectively, with a span of 24 metres.
- Connecting plates will have a length with space for (10-20) x 2 screws 36.
- connecting plates generally can be connected with the vertical inner sides of the metal profiles 8, 10 by means of gluing whereby the thermal conductivity can be further reduced.
- Fig. 7 shows a box-shaped connecting plate 40 having a core 42 of mineral wool or insulating foam, where the core 42 is connected at opposing outer sides by metal plates 44 with low thermal conductivity (U-value), the metal plates 44 preferably externally covered with an insulating layer 46 of e.g. so-called integral foam.
- Fig 8 is shows how connecting plate 40 has been mounted in a lower metal section 10 by means of eight screws 36 which are screwed from the outer side of the metal section 10 and through the latter and the insulating layer 46 and fastened in the metal plate 44.
- Fig. 9 shows a second embodiment of a box-shaped connecting plate 48 with opposing outer sides and transverse sides consisting of fibre-reinforced construction plates 50, and which has a core 52 of mineral wool or insulating foam.
- Fig 10 is shows how connecting plate 48 has been mounted in a lower metal section 10 by means of eight screws 36 which are screwed from the outer side of the metal section 10 and through the metal section 10 and fastened in the construction plate 50.
- Fig. 11 shows a third embodiment of a box-shaped connecting plate 54 with opposing outer sides and transverse sides consisting of fibre-reinforced construction plate 50 and having a core 52 of mineral wool or insulating foam, the outer sides further provided with upper and lower metal plates 56, 58 which are disposed with vertical spacing B which in practice will correspond to the spacing A between the narrow outwardly bent edges 14, 16 of the metal sections 8, 10.
- Fig 12 is shows how connecting plate 54 has been mounted in a lower metal section 10 by means of eight screws 36 which are screwed from the outer side of the metal section 10 and through the metal section 10 and fastened in the construction plate 50.
- Fig. 13 shows a roof girder known per se where outwardly bent edges 14, 16 of the metal sections 8, 10 do not have any vertical spacing and where the previously used mechanical connection by clinching (press joint) is replaced by a connecting plate 60 fastened to each of the metal sections 8, 10 by means of 8 x 2 screws 36. Possibly, with regard to reducing the effect of a thermal bridge, non-woven material is placed between the inner sides of the metal sections 8, 10 and the outer side of the connecting plate 60.
- Fig. 14 shows a roof girder 12 according to the invention where the mechanical connection between the metal sections 8, 10 that are disposed with spacing A is effected by means of a connecting plate 60 consisting of metal with modest heat conductivity, e.g. stainless steel. The latter is fastened to each metal section 8, 10 by means of 8 x 2 screws 36.
- a connecting plate 60 consisting of metal with modest heat conductivity, e.g. stainless steel.
- the latter is fastened to each metal section 8, 10 by means of 8 x 2 screws 36.
- non-woven material is placed between the inner sides of the metal sections 8, 10 and the outer side of the connecting plate 60.
- Fig. 15 shows a roof plate element 2 with eaves 7 supported on a support in the form of a strong steel beam 11.
- the eaves 7 is established in that the roof girders 12 consist of an upper metal section 8 which has greater length than the lower metal section 10.
- Fig. 16 shows a roof girder 12 according to the invention with eaves 7, i.e. the upper metal section 8 has greater length than the lower metal profile 10, where the mechanical connection between the metal sections 8, 10 disposed with spacing A is effected by means of a connecting plate 61 consisting of metal with modest heat conductivity, e.g. stainless steel. The latter is fastened to each metal section 8, 10 by means of 8 x 2 screws 36.
- non-woven material is placed between the inner sides of the metal sections 8, 10 and the outer side of the connecting plate 60.
- Fig. 17 shows yet an alternative embodiment of a connecting plate 62 which is very similar to that of Figs. 11 and 12 , as the opposing side plates 64 have greater height than the transverse plates 66, which is also shown in Fig. 18 showing a cross-section through a roof girder 12 where the side plates 64 are bearing directly against opposite short sides of the upper metal section 8 and the lower metal profile 10.
- Fig. 19 shows a further embodiment for a connecting plate 68 which in a simple way can be made by shortening of a longer pre-bent metal section.
- Figs. 20-22 show a completely alternative way of reducing the heat conductivity in a roof girder.
- Fig. 20 shows a cross-section through an upper part of a roof girder 70 where the mutually facing outwardly bent edges of an upper and lower metal section are directly connected in a known way, e.g. by clinching.
- the metal sections are made from coil sheets that have prefabricated lateral slits 72 disposed in relation to each other in such a pattern that a kind of labyrinth is formed with the object of increasing the heat conduction path through the side of the metal section, as indicated in Fig. 22 with broken line 74.
- Fig. 23 shows a roof construction 76 with unilateral slope which is "incorporated" in the applied roof girders 78, i.e. the spacing increases upwards between upper inclined metal sections 8 and lower horizontal metal sections 10. At the bottom is used a standard connecting plate 34 whereas the other connecting plates are adapted to the increasing spacing between the metal sections 8, 10.
- Fig. 24 shows a roof construction 80 with slope at two sides which is also "incorporated" in the applied roof girders 82. At opposing sides are used standard connecting plates 34 whereas the other connecting plates are adapted to the varying spacing between the upper inclined metal sections 8 and the lower horizontal metal sections 10.
- Figs. 25-30 shows an alternative embodiment of a roof plate element 82 where three roof girders 84 are designed as lattice girders ( Fig. 26 ) constructed from two U-shaped metal sections 8, 10 where between is mounted end fish plate connections 86 ( Fig. 28 ) and plate-shaped struts 88 ( Figs. 29 and 30 ).
- Fig. 31 shows a block 90 of insulating material intended to be mounted directly between two U-shaped steel sections 8, 10 as the insulating block 90 previously has been provided with cross-braces 92 of steel sheeting which is glued to opposite sides of the insulation block 90, and which subsequently is connected with side edge parts of the U-shaped metal profiles 8, 10 by means of screws.
- Fig. 32 shows a corresponding block 90 of insulation material where cross-braces 94 consist of steel sheeting, where opposite side edges 96 are bent in a right angle and where the cross-braces 94 are fastened to opposite sides of the block 90 by fitting the side edges 96 into the block and possibly by supplementary gluing.
- Fig. 33 shows yet a block 90 of insulation material where intersecting cross-braces 98 are fastened to opposing sides of the block 90 by gluing before this as mentioned above is fastened between U-shaped metal sections 8, 10.
- Fig. 34 shows an edge joint between two roof plate elements 100 where between lower adjacent side edges 102 of respective roof plate elements 100 there is established a good pressure-tight connection between overlapping side edges 104 of vapour barrier 106.
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Description
- The present invention concerns a roof girder of the kind indicated in the introduction of
claim 1. - The invention also concerns a prefabricated roof plate element with one or more roof girders according to the invention.
- Prefabricated roof girders and roof plate elements, respectively, of this kind can be made of 100% inorganic materials which is very significant to durability and maintenance. Besides, it is of great significance that the roof plate elements in question can have a free span of up to 22 metres, i.e. one single roof plate element may cover about 80 m2, which of course is very essential with regard to reducing the construction time.
-
EP 2 145 056 A1 (WO2008/125109A1 ) describes a prefabricated roof plate element, including one or more longitudinal box-shaped roof girders that each consists of two predominantly U-shaped metal sections which at mutually facing, open sides are interconnected along narrow outwards bent lateral edges, the roof girders being connected at upper and lower narrow sides corrugated in longitudinal direction with metal plates corrugated in transverse direction and having approximately the same width as the roof plate element, the roof girders/support girders and roof plate element, respectively, designed with reduced height at an end part intended to form eaves. -
WO 02/092937 A1 - It is the purpose of the invention to indicate a further improved roof girder of the kind mentioned in the introduction and a further improved roof plate element which by means of simple technical measures may entail very substantial projecting advantages, and which furthermore has appeared to enable an architecturally very simple and light construction of the visible part of the roofing on a building. In addition, at the same time is furthermore achieved that the roof girder and the roof plate element according to the invention in a simple way are provided the required space for meeting the raised requirements to insulation, i.e. meet the current standards of the building regulation to reduced λ- and U-values (coefficient of thermal conductivity and thermal conductivity, respectively).
- The roof girder according to the invention is peculiar in that the metal sections at the lower and lower open sides, respectively, are interconnected by means of a plurality of connecting plates which are fastened to inner, substantially vertical sides of the metal sections in such a way that there is a spacing between the narrow outwardly bent edges of respective lower and upper metal sections; that the cavity is filled with insulation material; and that the plurality of connection plates are provided at different positions along the rood girder. By means of simple technical provisions can hereby be achieved substantial projecting advantages and which furthermore have appeared to enable an architecturally very simple and light construction of the visible part of the roof plate on a building.
- At the same time is furthermore achieved that the roof girder invention in a simple way is provided the required space for additional layers of insulating material in order to fulfil the raised requirements to insulation, i.e. meet the current standards of the building regulation to reduced λ- and U-values (coefficient of thermal conductivity and thermal conductivity, respectively), which particularly is due the fact that the thermal bridge known from prior art roof girders is effectively counteracted in that the metal sections are not directly connected with each other.
- The roof girder according to the invention may at the same time be provided a significantly increased span of up to more than 24 metres in that the spacing between the narrow outwardly bent edges amount to 50-500 mm, preferably 100-200 mm. In that connection it is to be emphasised that due to the mutual spacing between upper and lower metal sections, a considerable reduction in the steel consumption between 20 and 50% can be achieved, compared with a prior art roof girder with correspondingly higher upper and lower metal sections.
- A roof girder according to the invention may advantageously be designed such that a lower of the U-shaped metal sections is shorter than an upper of the U-shaped metal sections, and that the upper U-shaped section is closed downwards at a projecting end part intended to form eaves in a roof plate element by means of a preferably U-shaped metal section, which is disposed internally of the upper U-shaped metal section and fastened to the latter.
- In some cases there is a desire for a lower extension, i.e. lower eaves, and in such case the lower metal section is longer than the upper metal section.
- With the object of further simplifying mounting, the roof girder according to the invention may suitably be designed such that the connecting plates are constituted by prefabricated units, the width of which adapted to the internal width of the U-shaped metal sections, and the height and length of which varying in dependence on the height of the roof girder and the actual longitudinal disposition of the units in the roof girder.
- In an embodiment, the roof girder according to the invention can be designed such that the prefabricated units are constituted by box-shaped units having a core of mineral wool or insulating foam, where the core is connected at opposing outer sides by metal plates with low thermal conductivity (U-value), the metal plates preferably externally being covered with an insulating layer of e.g. so-called integral foam (
Figs. 7 and 8 ). - In an alternative embodiment, the roof girder according to the invention can be designed such that the prefabricated units are constituted by box-shaped units with opposing outer sides and transverse sides consisting of fibre-reinforced construction plates or composite plates, and which have a core of mineral wool or insulating foam (
Figs. 9 and 10 ). - By a further alternative embodiment, the roof girder according to the invention can be designed such that the prefabricated units are constituted by box-shaped units with opposing outer sides and transverse sides consisting of fibre-reinforced construction plates or composite plates, and which have a core of mineral wool or insulating foam, the outer sides further provided with upper and lower metal plates disposed with vertical spacing (
Figs. 11 and 12 ). - According to yet an embodiment, the roof girder according to the invention can be designed such that the connecting plates are constituted by connecting plates of metal or composite plates with low thermal conductivity (U-value) adapted to be connected with opposing vertical inner sides of the upper and lower U-shaped metal sections, and in the form of a transverse connecting partitioning integrated with the connecting plates.
- With the intention of further reducing the heat conductivity and to obviate an actual thermal bridge, it may furthermore be advantageous that between the outer side of the connecting plates of metal or composite plates with low heat conductivity and the inner side of the vertical sides of the metal section there is provided a layer of non-woven material or other suitable intermediate layer of non-conducting material.
- The invention additionally concerns a roof plate element of the kind indicated in the preamble of
claim 9, the roof plate element being peculiar in that it includes an upper connection between the longitudinal roof girders, the connection consisting of a construction plate of inorganic and non-flammable material, a trapezoidal steel sheet or a sandwich panel, a layer of compression-resistant insulation, an upper roof membrane and an underside lining of laths and insulating plates. - In an alternative embodiment of a prefabricated roof plate element according to the invention, the underlining consists of trapezoidal sheets of steel or light-alloy metal, the sheets optionally including suitable insets of insulating material. The underlining may alternatively consist of ceiling boards of non-flammable, inorganic construction plates. The roof girders and the roof plate elements can be made with heights adapted to span and loads. According to the invention, it is possible to produce roof girders and roof plate elements with built-in slope to one or two sides (
Figs. 23 and 24 ), implying a very great cost-saving as the roof slope is not to be built up on the construction site. - Moreover, roof girders and roof plate elements according to the invention all fulfil current standards for environmental sustainability and CO2-saving, which is particularly due to the much prolonged service life because of the use of inorganic materials. In that connection it has furthermore appeared that the use of steel sections as load-bearing elements rather than e.g. laminated wood also gives a much increased service lift in addition to increased span.
- An alternative application can be that girders and elements according to the invention can advantageously be used as façade covering and as storey partitionings with a span up to even 15 metres.
- The invention is explained more closely in the following with reference to the drawing, on which:
- Fig. 1
- shows a plan view of a cross-section of an embodiment of a roof plate element according to the invention with eaves at a side edge;
- Fig. 2
- shows a plan view of a longitudinal section of the roof plate element shown in
Fig. 1 according to the invention; - Fig. 3
- shows a plan view of a cross-section of a second embodiment of a roof plate element according to the invention;
- Fig. 4
- shows a plan view of a partial longitudinal section of the roof plate element shown in
Fig. 3 according to the invention; - Fig. 5
- shows a plan view of a cross-section of a third embodiment of a roof plate element according to the invention;
- Fig. 6
- shows a plan view of a partial longitudinal section of the roof plate element shown in
Fig. 5 according to the invention; - Fig. 7
- shows a perspective view of an embodiment of a connecting plate for a roof girder according to the invention;
- Fig. 8
- shows a perspective view of a lowermost steel section of a roof girder according to the invention with a connecting plate screwed on cf.
Fig. 7 ; - Fig. 9
- shows a perspective view of a second embodiment of a connecting plate for a roof girder according to the invention;
- Fig. 10
- shows a perspective view of a lowermost steel section of a roof girder according to the invention with a connecting plate screwed on cf.
Fig. 9 ; - Fig. 11
- shows a perspective view of a third embodiment of a connecting plate for a roof girder according to the invention;
- Fig. 12
- shows a perspective view of a lowermost steel section of a roof girder according to the invention with a connecting plate screwed on cf.
Fig. 11 ; - Fig. 13
- shows a perspective view of a prior art roof girder with an embodiment with a connecting plate;
- Fig. 14
- shows a perspective view of a roof girder according to the invention with an embodiment with a connecting plate;
- Fig. 15
- shows a plan view of a longitudinal section of a roof plate element with longitudinal eaves (cantilever and saddle notch) according to the invention;
- Fig. 16
- shows a perspective view of a roof girder with longitudinal eaves according to the invention with an alternative connecting plate;
- Fig. 17
- shows a perspective view of an alternative embodiment of a box-shaped connecting plate;
- Fig. 18
- shows a plan view of a cross-section through a roof girder according to the invention for illustrating use of the connecting plate shown in
Fig. 17 ; - Fig. 19
- shows an alternative embodiment of a connecting plate for a roof girder according to the invention;
- Fig. 20
- shows a plan view of a cross-section through an alternative roof girder where the thermal bridge effect in the metal section is reduced by means of lateral slits forming a labyrinth for the heat conducting path;
- Fig. 21
- shows a plan view of a part of a steel plate designed with rows of oblong lateral slits;
- Fig. 22
- shows an enlarged plan view of the lateral slits shown in
Fig. 21 ; - Fig. 23
- shows a plan view of a cross-section in a roof construction with a roof plate element with a slope according to the invention;
- Fig. 24
- shows a plan view of a cross-section in a roof construction with a roof plate element sloping at two sides according to the invention;
- Fig. 25
- shows a perspective view of an alternative embodiment of a roof plate element with roof girders designed as lattice girders;
- Fig. 26
- shows a perspective view of a roof girder designed as a lattice girder;
- Fig. 27
- shows a perspective view of side part of the roof girder shown in
Fig. 26 ; - Fig. 28
- shows a perspective view of an end fish plate connection to the roof girder according to the invention shown in
Fig. 26 ; - Fig. 29
- shows a perspective view of a plate strut to the roof girder shown in
Fig. 26 ; - Fig. 30
- shows a perspective view of the plate strut in
Fig. 29 , as seen from the opposite side; - Fig. 31
- shows a perspective view of a solid insulation block for use in constructing a roof girder where struts of steel sheeting are fastened at the side of the insulation block by gluing before the insulation block is fastened between an upper and a lower U-shaped metal section;
- Fig. 32
- shows a perspective view of a solid insulation block for use in constructing a roof girder where struts of steel sheets with bent out side edges are fastened at the side of the insulation block by pressing in the side edges in the latter and by supplementary gluing;
- Fig. 33
- shows a perspective view of a solid insulation block for use in constructing a roof girder where mutually crossing struts of steel sheets are fastened at the side of the insulation block by gluing; and
- Fig. 34
- shows a plan view of a joint between two roof plate elements to illustrate how a joint between mutually overlapping edges of vapour barrier can be assembled in an entirely pressure-tight way.
-
Figs. 1 and 2 show sectional views of an embodiment of aroof plate element 2 according to the invention where side eaves 6 are established at a side of theroof plate element 2, as an outer protruding part 4 of theroof plate element 2 has reduced thickness which is produced by means ofinsert girders 5 supporting the upper extended part of the roofing, and which are inserted at the side of theroof plate element 2 and disposed in an interspace between upper reversedU-shaped metal sections 8 and lowerU-shaped metal sections 10. - According to the invention, the upper and
lower metal sections bent edges bent edges roof girders 12 with increased height and thereby increased bending stiffness are thereby provided. In practice, the spacing A can vary between 50 and 500 mm, preferably between 100 and 200 mm. - Furthermore, the
interspace 7 established between themetal sections tubes 9 provided in the interspace 7 (Fig. 2 ). Instead of the direct mechanical connection of the narrow outwardlybent edges lower metal sections Figs. 7 - 12 ,14 and16 -19 , where each will be explained separately in detail in the following. - In a simple way, the required space for additional layers of insulating material is provided in order to fulfil the raised requirements to insulation, i.e. meet the current standards of the building regulation to reduced λ- and U-values (coefficient of thermal conductivity and thermal conductivity, respectively).
-
Figs. 1 - 6 show prefabricatedroof plate elements 2 including one or morelongitudinal roof girders 12 which are placed along opposing sides and at the centre between the opposing sides of theroof plate element 2 which includes an uppermechanical connection 18 between thelongitudinal roof girders 12, themechanical connection 18 consisting of a construction plate of inorganic and non-flammable material, a trapezoidal steel sheet or a sandwich panel, a layer of compression-resistant insulation 20, anupper roof membrane 22 and an underside lining 24 oflaths 26 and insulatingplates 30. Alternatively, the underlining 24 may consist oftrapezoidal sheets 32 of steel or light-alloy metal and possibly insulation integrated in the trapezoidal sheets. - The cavities of
roof girders 12 androof plate elements 2 are filled with suitable insulation which, as most clearly shown inFigs. 1, 2, 3 and5 , provide that the longitudinal spacing A between themetal sections - The mechanical connections between
metal sections Figs. 4 ,6 and15 where themetal sections roof plate element 2 are joined by a relatively wide connectingplate 34 that provides space for tenscrews 36 in each of themetal sections plate 34, respectively. Besides, there is shown a narrower central connectingplate 36 with a width providing space for fourscrews 36 in each of themetal sections plate 38, respectively. - In practice, the situation will be as follows by a
roof girder 12 and aroof plate element 2, respectively, with a span of 24 metres. Connecting plates will have a length with space for (10-20) x 2 screws 36. Over the first 5 metres measured from each their end of theroof girder 12 and theroof plate element 2, respectively, there will be a spacing between narrow connecting plates of about 750 mm, where e.g. there is space for (4-6) x 2screws 36, whereas at the central about 14 metres, there will be a spacing of about 2000 mm between narrow connecting plates with space for (4-6) x 2 screws 36. - It is to be mentioned that connecting plates generally can be connected with the vertical inner sides of the
metal profiles -
Fig. 7 shows a box-shaped connectingplate 40 having acore 42 of mineral wool or insulating foam, where thecore 42 is connected at opposing outer sides bymetal plates 44 with low thermal conductivity (U-value), themetal plates 44 preferably externally covered with an insulating layer 46 of e.g. so-called integral foam. InFig 8 is shows how connectingplate 40 has been mounted in alower metal section 10 by means of eightscrews 36 which are screwed from the outer side of themetal section 10 and through the latter and the insulating layer 46 and fastened in themetal plate 44. -
Fig. 9 shows a second embodiment of a box-shaped connectingplate 48 with opposing outer sides and transverse sides consisting of fibre-reinforcedconstruction plates 50, and which has acore 52 of mineral wool or insulating foam. - In
Fig 10 is shows how connectingplate 48 has been mounted in alower metal section 10 by means of eightscrews 36 which are screwed from the outer side of themetal section 10 and through themetal section 10 and fastened in theconstruction plate 50. -
Fig. 11 shows a third embodiment of a box-shaped connectingplate 54 with opposing outer sides and transverse sides consisting of fibre-reinforcedconstruction plate 50 and having acore 52 of mineral wool or insulating foam, the outer sides further provided with upper andlower metal plates 56, 58 which are disposed with vertical spacing B which in practice will correspond to the spacing A between the narrow outwardlybent edges metal sections - In
Fig 12 is shows how connectingplate 54 has been mounted in alower metal section 10 by means of eightscrews 36 which are screwed from the outer side of themetal section 10 and through themetal section 10 and fastened in theconstruction plate 50. -
Fig. 13 shows a roof girder known per se where outwardlybent edges metal sections plate 60 fastened to each of themetal sections metal sections plate 60. -
Fig. 14 shows aroof girder 12 according to the invention where the mechanical connection between themetal sections plate 60 consisting of metal with modest heat conductivity, e.g. stainless steel. The latter is fastened to eachmetal section metal sections plate 60. -
Fig. 15 shows aroof plate element 2 witheaves 7 supported on a support in the form of astrong steel beam 11. Theeaves 7 is established in that theroof girders 12 consist of anupper metal section 8 which has greater length than thelower metal section 10. -
Fig. 16 shows aroof girder 12 according to the invention witheaves 7, i.e. theupper metal section 8 has greater length than thelower metal profile 10, where the mechanical connection between themetal sections plate 61 consisting of metal with modest heat conductivity, e.g. stainless steel. The latter is fastened to eachmetal section metal sections plate 60. -
Fig. 17 shows yet an alternative embodiment of a connecting plate 62 which is very similar to that ofFigs. 11 and 12 , as the opposingside plates 64 have greater height than thetransverse plates 66, which is also shown inFig. 18 showing a cross-section through aroof girder 12 where theside plates 64 are bearing directly against opposite short sides of theupper metal section 8 and thelower metal profile 10. -
Fig. 19 shows a further embodiment for a connectingplate 68 which in a simple way can be made by shortening of a longer pre-bent metal section. -
Figs. 20-22 show a completely alternative way of reducing the heat conductivity in a roof girder.Fig. 20 shows a cross-section through an upper part of aroof girder 70 where the mutually facing outwardly bent edges of an upper and lower metal section are directly connected in a known way, e.g. by clinching. The metal sections are made from coil sheets that have prefabricatedlateral slits 72 disposed in relation to each other in such a pattern that a kind of labyrinth is formed with the object of increasing the heat conduction path through the side of the metal section, as indicated inFig. 22 withbroken line 74. -
Fig. 23 shows a roof construction 76 with unilateral slope which is "incorporated" in the appliedroof girders 78, i.e. the spacing increases upwards between upperinclined metal sections 8 and lowerhorizontal metal sections 10. At the bottom is used a standard connectingplate 34 whereas the other connecting plates are adapted to the increasing spacing between themetal sections -
Fig. 24 shows aroof construction 80 with slope at two sides which is also "incorporated" in the appliedroof girders 82. At opposing sides are used standard connectingplates 34 whereas the other connecting plates are adapted to the varying spacing between the upperinclined metal sections 8 and the lowerhorizontal metal sections 10. -
Figs. 25-30 shows an alternative embodiment of aroof plate element 82 where threeroof girders 84 are designed as lattice girders (Fig. 26 ) constructed from twoU-shaped metal sections Fig. 28 ) and plate-shaped struts 88 (Figs. 29 and 30 ). -
Fig. 31 shows a block 90 of insulating material intended to be mounted directly between twoU-shaped steel sections cross-braces 92 of steel sheeting which is glued to opposite sides of the insulation block 90, and which subsequently is connected with side edge parts of theU-shaped metal profiles -
Fig. 32 shows a corresponding block 90 of insulation material where cross-braces 94 consist of steel sheeting, where opposite side edges 96 are bent in a right angle and where the cross-braces 94 are fastened to opposite sides of the block 90 by fitting the side edges 96 into the block and possibly by supplementary gluing.. -
Fig. 33 shows yet a block 90 of insulation material where intersecting cross-braces 98 are fastened to opposing sides of the block 90 by gluing before this as mentioned above is fastened betweenU-shaped metal sections -
Fig. 34 shows an edge joint between tworoof plate elements 100 where between lower adjacent side edges 102 of respectiveroof plate elements 100 there is established a good pressure-tight connection between overlapping side edges 104 ofvapour barrier 106.
Claims (10)
- A roof girder (12) and consisting of two substantially U-shaped metal sections (8, 10), the lower and upper open sides of which face each other, forming a cavity in between, and which is designed with narrow outwardly bent edges (14, 16), the roof girder (12) being corrugated at opposing upper and lower narrow sides in longitudinal direction, characterised in that the metal sections (8, 10) at the upper and lower open sides, respectively, are interconnected by means of a plurality of connecting plates (34) which are fastened to inner, substantially vertical sides of the metal sections (8, 10) in such a way that there is a spacing (A) between the narrow outwardly bent edges (14, 16) of respective lower and upper metal sections (8, 10); that the cavity is filled with insulation material; and that the plurality of connecting plates (34) are provided at different positions along the roof girder.
- A roof girder (12) according to claim 1, characterised in that the spacing (A) between the narrow outwardly bent edges (14, 16) amount to 50 - 500 mm, preferably 100 - 200 mm.
- A roof girder (12) according to claim 1, characterised in that a lower of the U-shaped metal sections (10) is shorter than an upper of the U-shaped metal sections (8), and that the upper U-shaped section (8) is closed downwards at a projecting end part intended to form eaves (7) in a roof plate element (2) by means of a preferably U-shaped metal section, which is disposed internally of the upper U-shaped metal section (8) and fastened to the latter.
- A roof girder (12) according to claim 1, characterised in that the connecting plates are constituted by prefabricated units, the width of which adapted to the internal width of the U-shaped metal sections, the height and length of which varying in dependence on the height of the roof girder and the actual longitudinal disposition of the units in the roof girder.
- A roof girder according to claim 4, characterised in that the prefabricated units are constituted by box-shaped units having a core of mineral wool or insulating foam, where the cores are connected at opposing outer sides by metal plates with low thermal conductivity (U-value), the metal plates preferably externally coated with an insulating layer of e.g. so-called integral foam (Figs. 7 and 8).
- A roof girder according to claim 4, characterised in that the prefabricated units are constituted by box-shaped units with opposing outer sides and transverse sides consisting of fibre-reinforced construction plates or composite plates, and which have a core of mineral wool or insulating foam (Figs. 9 and 10).
- A roof girder according to claim 4, characterised in that the prefabricated units are constituted by box-shaped units with opposing outer sides and transverse sides consisting of fibre-reinforced construction plates or composite plates, and which have a core of mineral wool or insulating foam, the outer sides further provided with upper and lower metal plates disposed with vertical spacing (Figs. 11 and 12).
- A roof girder according to claim 1, characterised in that the connecting plates are constituted by connecting plates of metal or composite plates with low thermal conductivity (U-value) adapted to be connected with opposing vertical inner sides of the upper and lower U-shaped metal sections, and that there is provided a transverse connecting partitioning integrated with the connecting plates.
- Prefabricated roof plate element, including one or more longitudinal roof girders according to claim 1, the roof girders disposed along opposite sides and between the opposite sides of the roof plate element, characterised in that it includes an upper connection between the longitudinal roof girders, the connection consisting of a construction plate of inorganic and non-flammable material, a trapezoidal steel sheet or a sandwich panel, a layer of compression-resistant insulation, an upper roof membrane and an underside lining of laths and insulating plates.
- A prefabricated roof plate element according to claim 9, characterised in that the underlining consists of trapezoidal sheets of steel, light-alloy metal, or inorganic and non-flammable construction plates.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12714553T PL2678491T3 (en) | 2011-02-25 | 2012-02-22 | Roof girder and premanufactured roof plate element with roof girders |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA201170104 | 2011-02-25 | ||
PCT/DK2012/050061 WO2012113406A1 (en) | 2011-02-25 | 2012-02-22 | Roof girder and premanufactured roof plate element with roof girders |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2678491A1 EP2678491A1 (en) | 2014-01-01 |
EP2678491B1 true EP2678491B1 (en) | 2015-04-22 |
Family
ID=45974215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20120714553 Active EP2678491B1 (en) | 2011-02-25 | 2012-02-22 | Roof girder and premanufactured roof plate element with roof girders |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2678491B1 (en) |
CN (1) | CN103562474B (en) |
DK (1) | DK2678491T3 (en) |
PL (1) | PL2678491T3 (en) |
WO (1) | WO2012113406A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2959071B1 (en) * | 2013-02-21 | 2021-04-07 | Peehr Mathias Ørnfeldt SVENSSON | Prefabricated roof plate element and method for its production |
PL420892A1 (en) * | 2017-03-17 | 2018-09-24 | Climatic Spółka Z Ograniczoną Odpowiedzialnością Spółka Komandytowa | Bridgeless structural composite for construction of walls and floors and method for construction of walls and floors in buildings, using the bridgeless structural composite |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
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AT312884B (en) * | 1971-04-02 | 1974-01-25 | Hans Joachim Welz | carrier |
DE2116069A1 (en) * | 1971-04-02 | 1972-10-12 | WeIz, Hans Joachim, Dipl Ing , 7015 Korntal | Carrier |
US5519978A (en) * | 1994-02-07 | 1996-05-28 | Sucato; Edward | Stud assembly |
CN2217661Y (en) * | 1995-02-11 | 1996-01-17 | 中屋营造工程股份有限公司 | Girder form |
US6250042B1 (en) * | 1996-06-17 | 2001-06-26 | University Of Central Florida | Additional metal and wood composite framing members for residential and light commercial construction |
SE521234C2 (en) * | 2001-05-14 | 2003-10-14 | Ra I Hoegsby Ab | Method of providing hole profile and a hole profile beam joined by U-shaped sheet profiles |
US7418807B1 (en) * | 2004-05-28 | 2008-09-02 | Epic Metals Corporation | Decking |
MX2009011075A (en) * | 2007-04-16 | 2009-12-16 | Svensson Peehr Mathias Oernfel | Premanufactured roof plate element. |
CN201071565Y (en) * | 2007-07-19 | 2008-06-11 | 迈特建筑科技(武汉)有限公司 | Cold bending thin wall C-shaped steel component for building |
CN201284524Y (en) * | 2008-10-17 | 2009-08-05 | 上海欧本钢结构有限公司 | Hatch cold-bended steel top chord, round tube web member and steel bottom chord girder type support tie rod |
-
2012
- 2012-02-22 DK DK12714553.0T patent/DK2678491T3/en active
- 2012-02-22 CN CN201280020063.2A patent/CN103562474B/en active Active
- 2012-02-22 EP EP20120714553 patent/EP2678491B1/en active Active
- 2012-02-22 WO PCT/DK2012/050061 patent/WO2012113406A1/en active Application Filing
- 2012-02-22 PL PL12714553T patent/PL2678491T3/en unknown
Also Published As
Publication number | Publication date |
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CN103562474A (en) | 2014-02-05 |
CN103562474B (en) | 2016-04-13 |
PL2678491T3 (en) | 2015-10-30 |
DK2678491T3 (en) | 2015-07-20 |
WO2012113406A1 (en) | 2012-08-30 |
EP2678491A1 (en) | 2014-01-01 |
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