Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C3/00—Structural elongated elements designed for load-supporting
  • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
  • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures

Definitions

• This invention relates to a beam especially intended as a supporting member in buildings and the like, which beam comprises two side members provided with curvature and two distance members of a nailable material located between the side members and connected to these, the curvature of the side members being such that the beam at half of its height has a width which is less than at its lower and upper edges, at least one part of at least one of the distance members forming part of the longitudinal outer surface of the beam.
• As supporting members in buildlnsrs beamsof wood or metal are normally used. At coarser dimensions wooden beams are extremely expensive, and therefore metal beams have been used more and more. However, metal beams have the disadvantage that crossbars and the like cannot be directly nailed to these.
• the beam comprises distance members of a material which can be nailed, e,g. wood, located between side members of metal, a conventional nailing of crossbars and the like to the beam is made possible.
• the side portions of the beam preferably of thin plate, with each their curvature directed towards the centre of the beam.
• the side members have in their edge regions along the beam a greater thickness than the material thickness of an intermediate region of the side member located between the edge regions.
• the beam can sup ⁇ ort considerably higher loads before a permanent deformation appears than what is possible without curvature.
• the side members of the beams are made with double folding or triple folding in a region at their longitudinal edges the side members can be made in a considerably thinner plate thickness for a certain desired tolerance of the beam to loads than what should have been the case if double folding or triple folding had not existed.
• FIG. 1 is a perspective view of an embodiment of the beam according to the invention
• Figs. 2-4 are end views on a larger scale of a corner of the beam in alternative embodiments
• Fig. 5 shows schematically beams according to the invention with crossbars applied
• Figs. 6 and 7 show examples of how the beams can be interconnected.
• a beam 1 according to the invention comprises two side plates 2 and two distance members 3 and 5, which all extend along the whole beam 1.
• the side plates 2 are so arched that the width of the assembled beam is least in the region of half its height.
• the side plates 2 are provided with bendinars 6 so that bearing on part of the too surface 7 of the distance member 3 and part of the bottom surface 8 of the distance member 5 is obtained.
• the side members 2 are doubly folded at their upper and lower edge regions running along the beam 1 and, thus, have in their edge regions a greater thickness as compared with the material thickness of a central re gion of the side member located between the edge regions.
• a strong connection between the side members 2 and the distance members 3,5 is also made possible by the double folding.
• the side plates 2 of the beaml shown In Fior. 1 are connected with the distance members 3.5 by means of screws 9 but the connection can of course be carried out in a plurality of different ways, e.g. by nailing, glueing etc.
• the space 10 between the distance members 3,5 is preferably filled with some suitable filling material, e.g. polyurethane foam, plaster, light concrete, mineral wool or the like. It Is also possible to lay lines of different types in the space 10, which are then fixed with the filling material.
• Fig. 2 shows an alternative embodiment of a double folding of a side member 2'.
• Fig. 3 shows an example of how a triple folding of a side member 2"can be embodied.
• the side members 2''' can e.g. at their lower edges also be embodied as shown in Fig. 4 .
• a surface 20 is obtained which can carry panels or the like.
• the design of the beam 1 allows of conventlonal nailing and screwing to be made within the whole region of the externally visible surfaces of the distance members 3 and 5 and consequently, as is shown in Fig. 5, crossbars 12 can easily be applied on beams 1 of the invention. Besides, nailing and screwing can of course also be carried out on the end surfaces of the distance members 3,5,
• Fig. 6 shows an example of how to connect two beams crossing each other.
• Fig. 7 shows an example of a device 13 for connection of beams.
• the connecting means 13 is preferably embodied so that it encloses the outer contours of the beams.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Rod-Shaped Construction Members (AREA)
• Joining Of Building Structures In Genera (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20347729

Family Applications (1)

Country Status (3)

Cited By (7)

Families Citing this family (2)

Citations (8)

• 1982
  • 1982-09-06 SE SE8205053A patent/SE447003B/sv not_active IP Right Cessation
• 1984
  • 1984-03-06 WO PCT/SE1984/000081 patent/WO1985003968A1/en not_active Application Discontinuation
  • 1984-03-06 EP EP19840901122 patent/EP0173681A1/en active Pending

Patent Citations (8)

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