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
  • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
  • E04C3/18—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with metal or other reinforcements or tensioning members
• • 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
  • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
  • E04B5/12—Load-carrying floor structures formed substantially of prefabricated units with wooden beams
• • 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
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C3/00—Structural elongated elements designed for load-supporting
  • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
  • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
  • E04C3/292—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being wood and metal
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • 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
  • E04B2005/232—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with special provisions for connecting wooden stiffening ribs or other wooden beam-like formations to the concrete slab
  • E04B2005/237—Separate connecting elements

Definitions

• the invention relates to an industrially produced composite slab element comprised of a metal sheeting of special con ⁇ struction with the function of a composite and reinforcement part, on both sides of which joists are pressed forming together the element framework; a concrete slab portion; a reinforcement portion in the sealing compound, e.g. a steel net; and intermediate purlins.
• Slab elements are used mainly as base, intermediate and upper floors in detached houses, terraced houses, small apartment ..ouses and indutrial halls. With the concrete side mounted downward, the element is also well adaptable as a s.c. Radon preventing base floor.
• the object of this invention is to remove the above disadvant ⁇ ages and to produce a composite slab element, where a light and strong construction is achieved by joists pressed on both sides of a metal sheeting of special design and by a concrete portion engaged to the construction by said metal sheeting, in which slab construction the joists and sheeting take over the tension load and the compression load.
• the composite slab element according to the invention is characterized in what is presented in the patent claims.
• the advantage of the invention is, in the first place, the simplification of manufacture compared with previously known technology. It is also an advantage that a significantly longer effective span and a lighter construction are achieved, due to which the element transportation and handling costs are reduced. A further significant advantage is also the space left between the joists, allowing heating, plumbing, air con ⁇ ditioning and electric installations as well as sufficient sound and thermal insulation. Throug pre-stamped openings in the sheeting transverse heating, plumbing, air conditioning and electric installations can be done. The ease of making stair and other openings can also be considered an advantage as well as the soffit of joists functioning as studs and direct to which different roofing materials can be fixed by nails.
• Fig. 1 shows the slab element in the diagonal.
• Fig. 2 shows a cross-section of the slab element.
• Fig. 3 shows a lengthwise section of the slab element.
• Fig. 4 shows the slab element turned upside down.
• Fig. 5 shows a load-bearing joist as per the invention.
• Figure 1 is a composite slab element as per the invention comprising a concrete slab portion 1 including a steel net 2 as reinforcement of the construction.
• a concrete slab portion 1 including a steel net 2 as reinforcement of the construction.
• Under the concrete slab at a distance from each other, there are joists, both of them made of two wooden joists 8, in between of which a metal sheeting 4 is pressed.
• the metal sheeting has prongs 7 on both sides, the sheeting reaching to the lower edge of joists 8 and the upper edge of sheeting 4 protruding from between joists 8 to the concrete.
• the continuous sheeting 4 in the element attaches the wooden joists to the concrete.
• the element has also an intermediate purlin 5 transversal between joists 8.
• the element is manufactured so that in the first stage the cut-to-size joists 8 and sheeting 4 are pressed together. In the second stage the joists are connected for a certain spacing and the intermediate purlins 5 fixed in place.
• sealing compound 1 is casted as a layer of appr. 50 mm into a mould with demountable edge and levelled by vibration.
• a steel net 2 is then mounted on the sealing com ⁇ pound, whereafter the joist frame with intermediate purlins is put 1 on reinformcement 2 in the sealing compound, vibrated and pressed in the concrete till the sheeting has sunk 25 mm and intermediate purlins ab. 2 - 3 mm into the concrete. The element is then left to cure and to become solid.
• Figure 2 shows the element from the rear and partly sectioned and figure 3 shows a side view of the same element, partly sectioned.
• openings 6 are made apart from each other, through which transversal plumbings and wirings are possible.
• figure 4 the element is upside down and in this position applicable for installation as a base floor and, for instance as an embodiment, to prevent Radon hazards due to its dense structure.
• Figure 5 shows an example of a joist applicable in conjunction with the invention.
• a great bearing is capacity is reached by making the joist of several elements using two sheetings 4 and 14.
• the upper part 13 of sheeting 4 reaches into concrete 1.
• Joist elements 8 and 9 of joist upper part are joined together by sheeting 4, whereat plywood web 10 is also engaged with the upper part.
• the joist lower part is assembled by means of sheeting 14, into which elements 11 and 12 and web 10 are pressed. Most conveniently, the elements 8,9,11 and 12 are of wood.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Structural Engineering (AREA)
• Civil Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Floor Finish (AREA)
• Laminated Bodies (AREA)
• Cereal-Derived Products (AREA)
• Reinforcement Elements For Buildings (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=8542843

Family Applications (1)

Country Status (6)

Families Citing this family (5)

Family Cites Families (3)

• 1995
  • 1995-02-14 FI FI950641A patent/FI96898C/fi active
• 1996
  • 1996-02-14 AT AT96902293T patent/ATE197184T1/de active
  • 1996-02-14 EP EP96902293A patent/EP0815330B1/de not_active Expired - Lifetime
  • 1996-02-14 DE DE69610762T patent/DE69610762T2/de not_active Expired - Fee Related
  • 1996-02-14 WO PCT/FI1996/000082 patent/WO1996025566A1/en not_active Ceased
  • 1996-02-14 AU AU46661/96A patent/AU4666196A/en not_active Abandoned

Non-Patent Citations (1)

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