A FLOOR COMPONENT

Abstract: A floor component (1) includes a reinforced concrete slab (2) that has a plurality of mutually parallel sheet-meal beams (4), wherein an edge part of each beam (4) is embedded in the slab (2), and wherein a beam web (41) projects out from the slab (2) perpendicularly to said slab and terminates in or connects with a beam flange (5) that includes a part (42) which is bent through 90 DEG relative to the web (41). The first flange part (42) is followed by a second flange part (43) which is bent through 180 DEG over the first flange part (42) and which has a greater width than the first flange part (42).

Description: A floor component The present invention relates to a floor component of the kind apparent from the preamble of Claim 1. The invention thus relates to a floor component of the kind that includes a relatively thin reinforced concrete slab in which respective edges of the sheet-metal beams are firmly embedded such that the beams extend parallel with one another, wherein the beams include a web which is generally perpendicular to the main surface of the slab, and wherein a part of the beams connected with the web is bent through an angle of 90° relative to the web, so as to form a beam flange. Floor components of this kind typically include very slender sheet-metal beams. So that the mechanical strength of the beam material (steel) can be utilized for a considerably long period of time, the floor component is normally given a camber so that the concrete slab will take a generally flat state and be horizontally orientated when the floor component supports an intended load that is lighter than the calculated maximum load of the floor component. One drawback with known floor components of this kind is that the beam flanges tend to move laterally when the floor component is subjected to load. This lateral displacement is due to the eccentricity between the web and the flange of the sheet-metal beam, or more specifically to the eccentricity between the force flows in these parts of the beam. Another drawback is that closely adjacent beams do not have mutually facing flanges that form respective support means for two edge 2 portions of a slab, for instance for supporting the edges of a heat and sound absorption slab to be placed between said beams. Furthermore, it is difficult to mount on the beams (i.e. their flanges) fittings from which profiled ceiling supporting elements can be suspended. The object of the present invention is to provide a floor component of the aforedescribed kind that includes sheet-metal beams which are designed to overcome the aforesaid problems, either totally or partially. This object is achieved with a floor member according to the accompanying Claim 1. Further embodiments of the floor member are set forth in the accompanying dependent claims. The invention will now be described in more detail with reference to an exemplifying embodiment thereof and also with reference to the accompanying drawings . Figure 1 is a schematic, cross-sectional view of an inventive floor member. Figure 2 is a schematic sectional view taken on the line II-II in Figure 1, through a cambered floor component in accordance with the invention. Figure 3 illustrates the beam flange of the floor component, comprising a suspension fitting for profiled elements on which a ceiling can be fitted, and a generally U-shaped element by means of which the fitting can be hung on the flange-part of said beam. 3 Figure 4 is a sectioned view taken on the line IV-IV in Figure 3. Figure 5 is a sectioned view taken on the line V-V in Figure 3. Figure 6 is a sectioned view taken on the line VI-VI in Figure 5. Figure 7 is a sectioned view taken on the line VII-VII in Figure 3. Figures 1 and 2 illustrate a cambered floor component 1 that comprises a reinforced, relatively thin concrete slab 2 in which sheet-metal beams 4 are embedded along their edges. The slab reinforcement consists of steel fibres or conventional reinforcement matting. Each beam 4 has a web 41 which extends vertically and perpendicularly to the main surface of the slab 2. The lower edge of the web 41 terminates in or connects with a beam flange 5 which includes a first flange-part 42 that is bent through 90° relative to the web 41. There then follows a second flange part which is bent back through 180° relative to the first flange part 42 and that has a width which is greater than the width of said first flange part. Finally, the edge-part 44 of the second flange part 43 is bent away from the slab 2 through an angle of about 90°. This provides between the first and second flange parts 42, 43 an insertion gap 50 which is open on one side. The flange configuration also forms a support surface 6 on each side of the web 41, said support surfaces being located essentially on mutually the same height level. This enables a heat absorbing or sound absorbing slab (not shown) having essentially the same width as the distance between the webs 41 of mutually adjacent beams 4 to be inserted between said webs and supported by the support surface 6 , 6 ' . 4 That part of the bottom portion 43 of the flange which lies beneath the flange portion 42 will completely eliminate any tendency towards lateral movement, because the eccentricities of the two flange portions resulting from the force flows will cancel each other out (neutralise each other). The double-fold flange increases the percentage of steel in the flange relative to the web and therewith utilizes the shear capacity of the web to a greater extent. A stiffer floor component of greater bearing capacity can be obtained with the same amount of steel as that used in conventional floor components . It will be seen from Figures 3 to 7 that the web 71 of a previously known generally U-shaped suspension clamp or clip 7 includes a central opening 72 for receiving one leg 83 of a generally U-shaped fitting 8, the other leg 82 of which includes a bent end-part 86 (Figure 7) that includes a generally V-shaped cut out 85 such as to form two teeth 84 which support against the upper side of the flange-part 43. As will be seen from Figure 5, the opening 72 is formed by stamping a strap-like part 74 of the clip away from the adjacent portions 75 of the central part of the clip. According to one favourable embodiment of the invention, the leg 83 of the U-shaped fitting 8 is provided with nibs 86, 87 of which the front nib 86 is intended to snap up in front of the front edge of the strap-like part 74, whereas the back nib 87 is intended to form a stop for limiting the insertion of the leg 83 through the opening 72. This arrangement secures the clip 7 axially on the leg 83, although the clip can, nevertheless, be dismantled by, e.g., inserting a screw-driver between the strap 5 74 and the leg 83 of the fitting 8 while simultaneously pulling the fitting 8 away from the clip 7. A clip 7 of the illustrated kind functions to receive a known so-called hat-profile on which ceiling slabs or boards can then be fitted.

Claims: C l a i m s 6 1. A floor component (1) that includes a reinforced concrete slab (2) having a plurality of mutually parallel sheet-metal beams (4), wherein an edge-part of each beam (4) is embedded in the slab (2), and wherein a beam web (41) projecting out from the plate and extending perpendicular thereto terminates in or connects with a beam flange (5) and includes a flange-part (42) which is bent through 90° in relation to the web (41), characterized in that the first flange-part (42) is followed by a second flange part (43) which is bent over the first flange- part (42) through an angle of 180° and which has a greater width than the first flange-part (42). 2. A floor component according to Claim 1, characterized in that the second flange-part (42) has a free edge-part which is bent in a direction away from the concrete slab (2). 3. A floor component according to Claim 1 , characterized in that the ratio between the widths of the flange-parts (42,43) is chosen to minimize the tendency of the beam flange (42-44) to move laterally when the floor component (1) is subjected to load. 4. A floor component according to any one of Claims 1-3, characterized in that said first and second flange-parts (42,43) form support surfaces (6,6') on essentially the same level on their respective sides of the web (41). 5. A floor component according to any one of Claim 1-4, characterized by a clamping slot-like pocket (50) formed 7 between said first and said second flange-parts (42,43) and adapted to receive an insert element,. 6. A floor component according to any one of Claims 1-5, characterized by a support clip (7) for supporting a profiled structural element and adapted to be carried by the beam flange (5) through the medium of a generally U-shaped suspension fitting (8) whose one leg (82) supports against the upper side of the flange (5) and the underlying leg (83) of which extends through an opening (72) in the clip (7); and in that the other leg (83) of said fitting includes latching formations (86,87) which function to detachably fix the position of the clip (7) axially on the second leg (83) of said fitting.

Inventors: DANIELSSON ERIK, DANIELSSON, ERIK
Applicants: DANIELSSON ERIK, DANIELSSON, ERIK
Application year: 1999
Main classification: E04B5
IPC codes: E04B5, E04B9