MXPA99010190A - Pre-manufactured roof plate element and girder thereto - Google Patents

Abstract

A pre-manufactured roof plate element (4) comprising a number of longitudinal box-shaped girders (5) of steel plate, which are upwardly connected with a compressive force plate with almost same width as the girder (5), and which preferably are positioned in each side and in the midde of the element is described, and where said compressive force plate consists of a steel plate (6), which, seen in cross section, is corrugated, preferably trapezoid. Furthermore a box-shaped girder (5) of the said type is described. By means of simple provisions it is hereby obtained, that it becomes possible to reduce the overall height and the weight of the roof plate element, which may result in considerable savings by transport and storage of finished pre-manufactured roof plate elements. However, it is of great importance that a roof plate element or a girder according to the invention may be produced totally without use of organic material.

Description

ELEMENT OF PRE-MANUFACTURED CEILING PLATE AND BEAM FOR THE SAME DESCRIPTION OF THE INVENTION The present invention relates to a prefabricated ceiling plate element of the type described in the introductory part of claim 1. DE-A-1-25 20 255 describes a lightweight construction element consisting of construction elements which Roof plates and reinforcement profiles constitute an integrated unit, such as a prefabricated roof plate element, each consisting of at least one open basic profile glued directly onto an upper cover plate that constitutes both the roof and the compression element of load, and wherein the cover plate is wider than the basic profile and along both longitudinal edges extends out of the basic profile. Document EP-A1-0 675 990 (O 92/19826) discloses a prefabricated roof plate element comprising three basic, box-shaped, steel plate transport profiles, which are directly connected to a steel plate. compressive strength plate consisting of sturdy plywood, and having the same width as the basic profiles, which are placed along the opposite long sides and in the middle part of the roof plate element. What is common for these known lightweight ceiling plate elements is that they have a relatively high overall height, which, during manufacture, storage and transport, causes extraordinarily large space demands. In addition, when projecting and construction work without experience, the total height of the roof plate element itself is large, as it generates additional costs to obtain additional headroom. The purpose of the invention is to provide an improved pre-manufactured ceiling plate element of the type mentioned in the introductory part and which, by means of a simple provision makes it possible to reduce the overall height of the roof plate element itself. The roof plate element according to the invention is distinctive in that the compressive force plate consists of a steel plate which - viewed in cross section - is corrugated. By means of simple provisions such as those obtained herein, it becomes possible to reduce the overall height and weight of the roof plate member, which can result in considerable savings in both transportation and storage of the plate elements of the roof plate. Finished premanufactured roof. However, it is of the utmost importance that the roof plate element according to the invention be produced entirely without the use of organic material. In order to further reduce the overall height of the roof plate element itself, it may be advantageous that also the bottom side portion of the box-shaped beams - viewed in a cross-section - are also corrugated. In order to provide a box-shaped beam for the roof plate element according to the invention with better lateral stability, it may be appropriate for the steel plate of compressive force to have longitudinal folded side edges extending downwardly. along opposite vertical sides of the beam. The roof plate element according to the invention can be provided in such a way that the corrugation of the compressive force plate is trapezoidal, or the corrugation can be wave-shaped. In addition, the same is related to the lower side of the beam. By corrugation of the upper and lower side parts of the beam a better stability is obtained for forces directed up and down in relation to loads and gusts of wind. Furthermore, the invention relates to a box-shaped beam of the type mentioned in the introductory part of claim 5 by way of example for use in a roof plate element according to the invention., beam which is different in that the compressive force plate consists of a steel plate, which - seen in cross section - is corrugated. The overall height of the beam according to the invention can be further reduced, if the beam is provided in such a way that the bottom side portion of the box-shaped beams - cross-sectional views - is also corrugated. In order to further improve the load capacity and lateral stability of the beam according to the invention, it can advantageously be provided such that the steel plate of compressive force has longitudinal folded side edges extending downwards along opposite vertical sides of the beam. The beam according to the invention is preferably provided so that the corrugation of the compressive force plate is trapezoidal, or that the corrugation of the compressive force plate may have a waveform. The invention is explained in more detail in the following, with reference to the drawing, in which: Figure 1 shows a perspective view of a known pre-manufactured ceiling plate element, see EP-A1-0 675 990 (WO 92 / 19826) of the same type as the roof plate element according to the invention, Figure 2 shows a view-partly in section-of another known roof plate element, see NO-C-148 -823 or DE-A1 -25 20 255 with box-shaped beam of the steel plate, figure 3 shows a view, partly in section, of the beam part of a roof plate element known in figure 1, while the figure 4 shows a corresponding view partially in section- of a modality for a beam by a roof plate element according to the invention. Like the roof plate element 2 shown in FIGS. 1 and 3, the roof plate element according to the invention is manufactured with a variable range of length L, which may be an aluminum plate element. known premanufactured ceiling that varies from approximately 7.2-14.4 m, and the total thickness varies correspondingly between approximately 0.15 and -0.35 m, which, at that time is a considerable reduction of the thickness or of the total height in relation to that of known moment of the roof plate element, see figure 2, which has a maximum range of approximately 13.2 m and a thickness of 0.375 m. In other words, the development progresses towards the reduction of the overall height of the prefabricated lightweight ceiling plate elements by reducing the height of the box-shaped beam 5 consisting of an electro-coated steel plate. For the beam, see Figure 2, the upper side flanges are connected to the top deck plywood plate by means of longitudinal rods, which by the roof plate element shown in Figures 1 and 3 are replaced by an additional plywood plate having the same width as the box-shaped beam 5, and constituting the upper plate of compressive force. By the embodiment for a premanufactured roof plate element 4 according to the invention, shown in Figure 4, the plywood plate of additional compressive force is replaced by a corrugated upper plate 6, which as shown, has a trapezoidal corrugation; but which in principle can have any other form of corrugation, for example a corrugation in wave form. The upper plate 6 has at opposite lateral edges, folded side edges 8, which provide the upper plate with an additional resistance to bending, and which forms a natural lateral limitation of the box-shaped beam 5 of the ceiling plate element . The shown lateral edges 8 can possibly be avoided, which possibly makes it possible to use the trapezoidal corrugated steel plate, which is just cut to the correct width with the outer horizontal flanges, which are connected to the lateral flanges bent inwards of the beam profile of the beam, for example by means of self-tapping screws mounted from the upper side of the cover plate 10. Corresponding to them, the lateral edges 8 shown will make it possible to avoid the bent lateral flanges of the basic profile of the beam. As indicated in claim 2, a lower side portion of the beam 5 by the roof plate element 4 according to the invention can be provided with a suitable corrugation, which can make possible a further reduction of the thickness of the roof element. ceiling plate. The overall height or thickness of the roof plate element 4 according to the invention can range from about 14 m and with a width without changing the beam 5 can be reduced to about 0.2 m. With a width without change and with a total height of 0.30 m, the roof plate element or respectively the beam according to the invention can have a range of up to about 20 m. However, it is of the utmost importance that the roof plate element 4 according to the invention is manufactured completely without the use of organic material, that is, totally without material, which, due to humidity, can be damaged due to to the oxide. By means of the known ceiling plate elements, see for example figures 1, 2 and 3 of the upper cover plate, which usually consists of plywood, consist of a compressive force plate, or support a construction element. The same is the case of an additional plywood board by the roof plate element 2 shown in Figures 1 and 3, which also constitutes an important building part. Otherwise, it is nevertheless by means of the roof plate element respectively that the beam according to the invention, wherein the beam 5 itself constitutes a self-supporting box beam, which is where the top cover plate 10 does not it is included as a supported construction part. In other words, the beam 5 can be used as an independent light weight support beam. And as shown to the right of Figure 3, a roof plate member 4 may consist of several beams 5 (for example, with a mutual positioning corresponding to Figure 1) and where the upper cover plates 7 are They are formed by hard insulation plates covered with felt for roofing or roofing sheets. Such a roof plate element according to the invention can be covered down with eg perforated steel plates fixed directly to the underside of the beams 5, and can thus be included to support part of the roof construction.

Claims (8)

1. A pre-manufactured ceiling plate element comprising several longitudinal steel plate-shaped beams, which are connected upwards with a compressive force plate with substantially the same width as the beam and which are placed in each side and in the middle part of the element, characterized in that the compressive force plate consists of a steel plate which, seen in cross section, is corrugated.

2. The roof plate element, as described in claim 1, characterized in that the lower side portion of the box-shaped beams, seen in cross-section, are also corrugated.

3. The roof plate element, as described in claim 1, characterized in that the compressive force steel plate has longitudinal bent side edges extending downward along opposite vertical sides of the beam.

4. The roof plate element, as described in claim 1, characterized in that the corrugation of the compressive force plate is trapezoidal.

5. An example beam for a prefabricated roof plate element as described in claim 1, consisting of a basic profile in the form of a steel plate box with a plate of superior compressive force, characterized in that the plate of compressive force consists of a steel plate, which, seen in cross section, is corrugated.

6. The beam as described in claim 5, characterized in that the lower side portion of the box-shaped beams also consist of a steel plate which, seen in cross section, is corrugated.

7. The beam as described in claim 5, characterized in that the compressive strength steel plate has longitudinal folded side edges extending downward along opposite vertical sides of the beam.

8. The beam as described in claim 5, characterized in that the corrugation of the compressive force plate is trapezoidal.