DE3337006T - Method for supporting a sheet metal roof and roof structure for carrying out the method - Google Patents

Description

HELMUT SCHROETER Ki-AUS LEHMANN

DIPL.-PHYS. DIPL.-ING.

PATENT LAWYERS - EUROPEAN PATENT ATTORNEYS

■ ι-

Edvin Lindeil no-ldl-10

L / Be

15 '. November I983

Method for supporting a sheet metal roof and roof structure for carrying out the method

The invention relates to a method of wearing a Roof made of sheet metal, in which the sheet metal is a water-repellent surface layer, preferably in a known manner is trapezoidally corrugated or ribbed and has ribs with a trapezoidal cross-section which extend in the longitudinal direction of the sheet metal, and trapezoidal valleys extending between the ribs, the longitudinal direction being substantially parallel to the support distance, d. H. the direction of the width of the roof, and wherein the sheet metal at least in connection with the longitudinal edges of the roof is arranged on girders or corresponding members which are arranged perpendicular to the direction of the width of the roof are.

The invention also relates to a roof structure for implementation of the procedure.

Roof structures are known in which a water-repellent surface layer made of sheet metal on rafters, for example in the type of truss or beam scaffolding, which are placed on supports and which are at certain mutual distances are arranged in the longitudinal direction of the roof, the metal sheet or the like on a layer of roof panels. is worn that are arranged between the rafters and the metal sheet. Structures of this type thus have primary support members and secondary ones

D-7070 SCHWÄBISCH GMÜND ACCOUNTS: D-8000 MUNICH 70

H. SCHROETER Telephone: (07171) 56 90 Deutsche Bank AG Munich 70/37 369 (BLZ 700 700 10) K. LEHMANN Telephone: (089) 725 20

Bocksgasse 49 Telex: 7248 868 pagd d Postscheckkonto Munich 1679 41-804 (BLZ 700 100 80) Lipowskystraße 10 Telex: 5 212248 pawe d

Support members and a water-repellent surface layer. These constructions are therefore expensive.

In other known roof structures, a scaffolding or framework of corrugated or ribbed sheet metal parts is used, to support a water-repellent sheet metal layer. Constructions of this type are expensive and cause significant problems in the Connection and when absorbing annoyance with yourself.

In other known constructions, a sheet metal arch or a sheet metal arch is produced, which is supported on the edges will. These constructions give problems with regard to the absorption of horizontal forces, and it can only be relative limited support distances can be achieved.

The invention has the task of creating a roof structure in which the water-repellent layer, i.e. the sheet metal, also acts as a primary and secondary supporting structure, thereby making a roof construction possible that is simple to assemble, is cheap and easy to assemble.

The invention thus relates to a method for supporting a sheet metal roof, in which the sheet metal has a water-repellent surface layer represents and is preferably trapezoidally corrugated or ribbed in a known manner, the sheet metal ribs of trapezoidal cross-section extending in the longitudinal direction of the sheet metal, and trapezoidal valleys between the ribs are arranged, wherein the longitudinal direction extends substantially parallel to the support spacing, that is to the direction of the width of the roof, and wherein the sheet metal at least in connection with the longitudinal edges of the roof on girders or corresponding members extending perpendicular to the width direction of the roof.

The method according to the invention is characterized in particular by that the load from the roof or a section of roof

is absorbed in the form of tensile forces in rods that are between the longitudinal edges of the roof or the roof section extend, and that reaction forces, which are essentially the tensile forces correspond, are introduced into the sheet metal as compressive forces that act in the longitudinal direction of the sheet metal by the rods be anchored to the sheet at least at the edges, thereby increasing the capacity of the trapezoidal corrugated or ribbed Sheet metal to absorb compressive forces that act in the longitudinal direction of the sheet metal is used to support the roof.

The invention also relates to a roof structure in which a water-repellent surface layer in the form of a preferably Trapezoidal ribbed or corrugated sheet metal of known type has ribs with a trapezoidal cross-section, which extend in the longitudinal direction of the sheet metal, as well as trapezoidal valleys, which are arranged between the ribs, with the longitudinal direction extends substantially parallel to the support spacing, i.e. to the direction of the width of the roof, and wherein support beams or corresponding members substantially perpendicular to the width direction at least in connection with the longitudinal edges of the roof are arranged.

The roof structure is particularly characterized in that rods made of steel or a corresponding material for receiving of tensile forces are provided, which extend between the longitudinal edges of the roof or a roof section and which are anchored to the sheet metal at least at these edges, whereby reaction forces that essentially correspond to the tensile forces, as compressive forces are absorbed, which act in the longitudinal direction of the sheet, and thereby the capacity of the trapezoid oid-shaped corrugated or ribbed sheet metal to absorb compressive forces that act in its longitudinal direction, for support the roof structure is used.

Details of the invention are given below for some exemplary embodiments with reference to the accompanying drawings

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gen described in which

Fig. 1 schematically shows a first embodiment of a roof structure shows according to the invention, seen in the longitudinal direction of the roof,

Fig. 2 is a section AA according to Fig. 1,
Fig. 3 is a section BB according to Fig. 1,

4 schematically shows a second exemplary embodiment of a roof structure shows according to the invention, seen in the longitudinal direction of the roof,

Fig. 5 is a section C-C according to Fig. 4,

6 schematically a part of a third exemplary embodiment shows a roof structure according to the invention, in which an arch or a vault by preloading the rod has been formed

Fig. 7 is a section D-D according to Fig. 6,

Fig. 8 shows schematically part of a fourth embodiment of a roof structure according to the invention, in which an arch or vault has been formed, and

Fig. 9 shows schematically part of a fifth embodiment of a roof structure according to the invention, in which a vault or arch has been formed.

In Fig. 1, the reference number 1 denotes the sheet metal which, among other things, represents the water-repellent layer of the roof structure and which is preferably trapezoidally corrugated or ribbed in a known manner (FIG. 2) and ribs 2 with a trapezoidal cross-section which extend in its longitudinal direction,

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and trapezoidal valleys 3 arranged between the ribs are, wherein the longitudinal direction extends substantially parallel to the support distance, so to the width direction of the Badger. Support beams 4 or similar members are substantially perpendicular to the width direction at least in connection with the longitudinal edges 5, 6 of the roof.

According to the invention, bars 7 are made of steel or a corresponding one Material intended to absorb tensile forces. These rods 7 extend between the longitudinal edges 5j 6 of the Badger and are anchored to the sheet metal 1 at least at the edges 5, 6, so that reaction forces, which are essentially the tensile forces correspond to be absorbed as compressive forces acting in the longitudinal direction of the sheet metal 1, thereby increasing the ability of the trapezoidal corrugated or ribbed sheet metal to absorb compressive forces that act in its longitudinal direction for support the roof structure is used. According to the embodiment shown in Figures 1 to 3, these Compressive forces introduced into the sheet 1 through end supports 9 which act essentially perpendicular to the end face 8 of the sheet and which cooperate with the bars 7 and which consist, for example, of flat steel bars 9 with holes for the bars, by nuts 10 or the like. secured.

According to the invention intermediate supports 11 are provided which are substantially perpendicular between the rods 7 and the Extend sheet 1 and which are supported by the rods. The intermediate supports 11 can of course have several different ones Species be trained. According to the embodiment shown in FIG each intermediate support has a section 12 which extends horizontally and perpendicularly to said width direction extends and rests against the rods 7, and at least each of the ends 13, 14 of the section 12 a vertical part 15, 16, which rests against the sheet metal 1. At the intermediate supports 11, the rods 7 change their direction in a substantially perpendicular plane, whereby the perpendicular load is borne

can. In the embodiment shown in FIGS the bars 7 extend from one edge 5 to the other edge 6 at the lower end 17 of each of two intermediate supports 11 over, between which the bars are essentially horizontal extend.

For the water drainage at the edges 5 and 6, the end supports are designed in a suitable manner, for. B. with recesses 18 Locations that lie between the ribs 2, as shown in FIG. 3.

In Fig. 4 a second embodiment is shown, which is intended for a larger T-rag distance and for improved water drainage. It has two sections 19, 20 made of sheet metal, which extend parallel in the longitudinal direction of the roof and which meet at the roof ridge 2-1 or a corresponding member and which are inclined away from this in the width direction. Each roof section 19, 20 has end supports 22 on the edge 23 of the roof and end supports 24 on the roof ridge 21, and two intermediate supports 25, 26, an outer 25 and an inner 26, are provided on each roof section 19, 20. Rods 27 extend between the end supports 22 at the edges 23 of the roof at the lower end 28 of each of the intermediate supports 25, 26 over. On each roof section 19, 20 rods 29 extend from the end support 22 to the end support 24 at the upper end 30 of the outer intermediate support 25 and past the lower end 28 of the inner intermediate support 26. The end supports 24 are connected to one another in a suitable manner on the roof ridge and with a ridge plate 31 or the like. covered.

In Fig. 6 is a third embodiment of a roof structure shown according to the invention, in which the rods are preloaded to absorb tensile forces. At 32 that is Sheet metal of a roof section referred to, of which one half, namely the right half, is shown. It is provided that the sheet in the width direction of the section of one

whole, undivided sheet metal 32 is made. In the one shown in FIG Embodiment is provided that a wide roof is assembled from several roof sections, the side Side to each other in the width direction of the roof are arranged. The roof is through between two adjacent sections Supports 33 of a suitable type supported, and a gutter 34 for the water drainage from the roof sections is arranged between the sections, as can be seen from FIG.

The reference number 35 in Fig. 6 denotes a first outer intermediate support and the reference number 36 denotes a middle one Intermediate support. Rods 37 extend from an end support 38 or equivalent member at a first edge 39 of the Roof section to a corresponding end support 38 on one second edge (not shown) at the upper end 40 of the first outer intermediate support 35, the lower end Hl of the middle Intermediate support 36 and the upper end of a second outer Intermediate support (not shown) over. Bars 42 extend between the end supports 38 at the edges 39 on the lower one End 43 of the first outer intermediate support, the lower end 4l of the middle intermediate support 36 and the lower end of the second outer intermediate support.

The rods 37, 42 are, as mentioned, prestressed, for example in connection with the end supports 38 or in another suitable manner known way. By means of the rods 37, 42 it is intended to give the sheet metal a curvature or an arch shape by compressive forces extending in the longitudinal direction of the sheet 32, d. H. in the roof width direction as shown in FIG. In FIG. 7, a suitable rod arrangement is shown by means of a section D-D according to FIG. 6. Fig. 7 shows angle iron 44 or corresponding links, including Represent supports for the intermediate supports and extend in the width direction of the roof extend below the bars. -

Λ.

In Pig. 8 shows a fourth embodiment in which the sheet metal is to be pretensioned in a curved shape and in which the sheet metal should be whole and undivided in each half of the roof and in which one central connection point 45 with one End support 46 on the sheet metal and a central connection point 47 also provided in connection with the angle iron 48 is. Bars 49 and 50 and intermediate supports 51 and 52 are in one Arranged in the manner that emerges from FIG.

In Fig. 9 a fifth embodiment is shown, in which a roof is to be assembled from several, in the present case two roof sections with an undivided sheet metal, and in which each roof section is prestressed by rods in a curved shape or arched shape, and in which the arcuate sections adjoin one another or are connected to one another in such a way that a substantially continuous arc or a corresponding curvature is formed. In this embodiment, an upper rod holder or end supports 55 , 56 on the end surfaces 57, 58 of the sheet metal and a lower rod holder 59 and 60 are arranged at the edges 53 and 54 of each section, the upper and lower holders by strut or expansion members 61 or corresponding links are connected. In each section, rods 62 preferably extend from an upper rod holder 55 on one edge 53 to an upper rod holder 56 on the other edge 54 past the lower end 63 of a first outer intermediate support 64 and a second outer intermediate support 65. Also disposed at each section are bars 66 which preferably extend from a lower bar holder 59 on one edge 53 to a lower bar holder 60 on the other edge over the upper ends of the first and second outer intermediate supports 64 and 65. Preferably, rods 68 also extend essentially horizontally between the outer free edge 53 of the two outer sections. Angle irons 69 or equivalent links extend from one lower rod holder 59 to the other lower rod holder 60.

_ ι η - -

The embodiment according to Pig. 9 can be changed for a larger support distance by adding more, for example three Sections are arranged in the width direction. By maintaining the condition that the bulges or arches of the sections are to adjoin one another essentially continuously, the height of the joined together in this way Enlarged bulge.

In the embodiment of FIG. 9 it is provided that the rods are pretensioned so that a curvature or an arch shape is achieved, which substantially with the compressive stress for an arch loaded with a uniformly distributed load.

Embodiments are also conceivable in which additional stiffening is achieved. In addition to the trapezoidal corrugation or ribbing, the sheet metal is given a wave shape which is superimposed, so to speak, on the trapezoidal corrugation or ribbing and which lies in a plane which is essentially perpendicular to the longitudinal direction of the ribs 2 and valleys 3 of the corrugated sheet metal. Such a waveform is indicated as an example in FIG. 2 by the wave-shaped line 1 'which includes a wave crest. The amplitude and the wavelength of the waveform can of course be varied within wide limits within the scope of the invention. The wave shape 1 'is applied to the sheet metal 1, preferably in connection with the intermediate supports 11, which thus have sections 15 » 16, 15', 16 'with different heights in the vertical direction. The sheet metal is attached to the intermediate supports here. The wave shape 1 'can gradually disappear outwards towards the ends of the sheet metal, for example the ends 5, 6, where the load is applied to the sheet metal. The wave shape 1 ′ can, preferably to a lesser extent, also be provided at these ends, for example on the roof ridge 21 and on the edges 23 in FIG. 4.

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Applications of this waveform 1 'can be imagined, for example for roofs that are not subject to snow loads, and the rods for absorbing tensile forces can be omitted will. The roof can be laid using a conventional rafter-and-beam arrangement or it can only be attached to the Be supported longitudinal edge parts of the roof or the roof sections. The rigidity of the corrugated and corrugated sheet metal becomes not used here or only to a very small degree due to the introduction of compressive forces in its longitudinal direction, but the rigidity of the corrugated and corrugated sheet metal is used directly to increase the unsupported length .

The stiffening by means of the waveform I ¹ is of course at. applicable to any embodiment of a roof according to the invention.

The method and function of the construction according to the invention should be essentially clear from the foregoing. The load from the roof or from one Roof section is absorbed as tensile forces in bars that are located between the longitudinal edges of the roof or roof section extend. The reaction forces, which essentially correspond to these tensile forces, are introduced into the sheet metal, i. H. in the water-repellent layer, namely as compressive forces in the longitudinal direction of the sheet, so the ribs 2 and the Valleys 3, act by the bars at least at these edges be anchored to the sheet metal. This makes the trapezoidal ribbed sheet metal capable of absorbing compressive forces, which act in its longitudinal direction, used to support the roof. The load is carried by the roof, i.e. H. from the sheet transferred to the bars through intermediate supports. The change in direction of certain rods on the intermediate supports contributes to the ability of carrying perpendicular loads.

O O O I

By, the end supports that rest against the end faces of the sheet metal, the compressive forces are introduced essentially centrally. The end supports are preferably, but only for example, designed as flat steel bars so that the load from the bars is uniform in the longitudinal direction of the edges is distributed.

By pretensioning in such a way that the shape of the bulge is substantially the same as the shape of a pressed one When the arc is loaded with a uniformly distributed load, essentially normal forces are achieved in the sheet. Snow loads are, for example, evenly distributed in this way.

A roof construction according to the invention is preferably substantially completely assembled before the roof is in his position is raised. The roof is then anchored to withstand wind loads.

As should have become clear from the above, the invention makes it possible that roofs with a water-repellent Layer of corrugated or corrugated sheet metal in a very simple and cheap way can be constructed by the ability of the sheet metal is used to absorb compressive forces that act in its longitudinal direction. The sheet metal takes here part of the construction both as a water-repellent layer and as a primary and secondary support structure. Through the In accordance with the invention, large support distances can be achieved at low cost. The arch shape or domed shape created by the Pre-tensioning is achieved, increases the buckling resistance of the sheet metal and at the same time facilitates water drainage.

The invention has been described above with reference to a few variants and various exemplary embodiments. It is clear that further variants and modifications and additions can be made without the basic idea of the

Invention to leave. For example, the number of intermediate supports and their position depending on the The support distance of the roof or the roof section can be changed. The arrangement of the bars described here is only as Understand embodiment. The rod arrangement, the prestressing, etc. must be adapted to the support spacing, etc. based on known theoretical strength principles.

The invention can of course also be applied to other than trapezoidal corrugations or ribs.

It should be understood that the sheet metal is not in individual lengths one behind the other between the end supports or corresponding Limbs should be connected, d. H. with junctions perpendicular to the longitudinal direction of the ribs and valleys extend. In the width direction, however, the connection can be carried out in a known manner, as indicated in FIG. 7 is.

The additional waveform 1 'can of course be effected in various ways. Cross bars or equivalent links with light weight can be placed on the lower surface of the sheet, with each rod with light Weight a flat iron or a corresponding member is arranged, which is brought into the wave shape, and on which Flat iron is to be attached to the sheet metal in order to give it the wave shape.

Claims (23)

HELMUTSCHROETER KLAUS LEHMANN ° ° ° ' ^UUU DIPL. -PHYS. DIPL.-ING. PATENT LAWYERS - EUROPEAN PATENT ATTORNEYS Edvin Lindell no-ldl-10 L / Be November 15, 1983 Method for supporting a sheet metal roof and roof structure for carrying out the method Claims (, ly * Method for supporting a sheet metal roof in which the sheet metal has a represents a water-repellent surface layer and is preferably trapezoidally corrugated or ribbed, with ribs of trapezoidal shape Cross-section extending in the longitudinal direction of the sheet and with trapezoidal valleys between the ribs, wherein the longitudinal direction extends substantially parallel to the direction of the support spacing, the width direction of the roof and wherein the sheet metal at least in connection with the longitudinal edges of the roof on girders or corresponding members is placed, which are arranged perpendicular to the width direction, characterized in that the Load from the roof or from a roof section in the form of tensile forces in rods (7, 27, 29, 37, 42, 49, 50, 62, 66, 68) which extend between the longitudinal edges (5, 6, 23, 53, 54) of the roof or the roof section, and that reaction forces, which essentially correspond to these tensile forces, are introduced as compressive forces into the sheet metal (1, 32) and in Act in the longitudinal direction of the sheet in that the bars are anchored at least at the edges of the sheet, whereby the D-7070 SCHWÄBISCH CMÜND ACCOUNTS: D-8000 MUNICH 70 H. SCHROETER Telephone: (07171) 56 90 Deutsche Bank AG Munich 70/37 369 (BLZ 700 700 10) K. LEHMANN Telephone: (089) 725 20 Bocksgasse 49 Telex: 7248 868 pagd d Postscheckkonto Munich 1679 41-804 (BLZ 700 100 80) Lipowskystraße 10 Telex: 5212248 Mwed • as' Ability of the trapezoidal corrugated or ribbed sheet metal to absorb compressive forces in its longitudinal direction act, is used to support the roof. 2. The method according to claim 1, characterized in that that the load from the sheet (1, 32) on the bars through intermediate supports (11, 25, 26, 35, 36, 51, 52, 64, 65) which are arranged substantially perpendicular between at least some of the rods and the sheet, and that the rods move their direction in a substantially perpendicular plane on at least certain intermediate supports change, whereby perpendicular load can be borne. 3. The method according to claim 1 or 2, characterized in that the compressive forces in the sheet metal (1, 32) with the help of end supports (9, 22, 38, 46, 55, 56) or corresponding members are introduced which are substantially perpendicular act on the end face (8, 51, 58) of the sheet and cooperate with the bars. 4. The method according to claim 1, 2 or 3, characterized g e k e η η -. draws that at least some of the rods are prestressed so that the sheet metal one by the compressive forces Curvature or arch shape is given, which extends in the longitudinal direction of the sheet. 5. The method according to claim 1, 2, 3 or 4, characterized in that a roof consists of two or more roof sections which are arranged side by side in the width direction. 6. The method according to claim 5, characterized in that that a curvature or arch shape is applied to each roof section by prestressing the rods, and that adjacent sections are connected to one another that their curvatures adjoin one another, so that one in the substantial continuous bulge shape is formed. 7. The method according to claim 4, 5 or 6, characterized in that a by the prestressing of the rods Curvature or arch shape is achieved, which corresponds essentially to the shape of a pressed arch, which with is subjected to a uniformly distributed load. 8. The method according to any one of the preceding claims, characterized in that a water drain to the Edges of the roof or a roof section achieved by suitable design of the anchorages of the rods at the edges will. 9- The method according to any one of the preceding claims, characterized characterized in that on the sheet (1, 32) in addition to the corrugation or ribbing, a wave shape (1 ') is applied in its width direction, namely on those sheet metal parts that are between the longitudinal edges (5, 6, 21, 23, 53, 54), and with a significantly larger wavelength than that of the ribbing or corrugation, whereby an additional stiffening is achieved. 10. The method according to claim 9, characterized in that the wave shape (1 ^T ) is applied to the sheet metal (1, 32) by means of intermediate supports (11, 25, 26, 35, 36, 51, 52, 64, 65). 11. The method according to claim 9 or 10, characterized in that the waveform (1 ·) at least in to a certain extent also on the longitudinal edges (5, 6, 21, 23, 53, 54) is applied. 12. The method according to claim 9, 10 or 11, characterized in that the sheet (1, 32) only on conventional Rafters or corresponding support parts is placed or that it is only on supports on the longitudinal edges C5, 6, 21, 23j 533 5 * 0 is applied, whereby compressive forces caused by originate from the support of the roof structure, not or only to a small extent in the longitudinal direction of the sheet metal and thereby the rigidity of the corrugated or corrugated and the additionally provided with the waveform Sheet metal is used directly to increase the unsupported length. 13. Roof construction with a water-repellent surface layer in the form of a preferably trapezoidal corrugated or ribbed metal sheet with ribs of trapezoidal cross-section, which extend in the longitudinal direction of the sheet, and with trapezoidal valleys between the ribs, wherein the longitudinal direction extends substantially parallel to the direction of the support distance, that is to the Width direction of the roof, and with girders or equivalent members substantially perpendicular to the Width direction are arranged at least in connection with the longitudinal edges of the roof, characterized in that bars (7, 27, 29, 37, 42, 49, 50, 62, 66, 68) made of steel or a corresponding material for absorbing tensile forces are provided, with the bars between the longitudinal edges (5, 6, 23, 53, 54) of the roof or a roof section and are anchored to the sheet metal (1,32) at least at these edges, whereby reaction forces, which correspond essentially to the tensile forces, are absorbed as compressive forces which in act in the longitudinal direction of the sheet, and thereby the ability of the trapezoidal corrugated or ribbed sheet to Absorption of compressive forces, which act in its longitudinal direction, is used to support the roof structure. 14. Roof structure according to claim 13, characterized in that arranged substantially perpendicularly Intermediate supports (11, 25, 26, 35, 36, 51, 52, 64, 65) between see at least certain rods and the sheet metal arranged are, wherein the intermediate supports are carried by the rods and on which intermediate supports at least certain Bars change direction in a substantially perpendicular plane, thereby bearing perpendicular loads be able. 15. Roof structure according to claim 13 or 14, characterized characterized in that the compressive forces in the sheet metal with the help of end supports (9, 22, 38, 46, 55, 56) or corresponding members are introduced which are substantially perpendicular to the end face (8, 57, 58) of the Sheet (1, 32) act and interact with the rods. 16. Roof structure according to claim 13, 14 or 15, characterized characterized in that at least some of the rods are biased so that a dome or a Arc shape, which extends in the longitudinal direction of the sheet, applied by the compressive forces on the sheet can be. 17. Roof structure according to claim 13 ₃ , 14, 15 or 16, characterized in that the sheet consists of sheets which are integral and undivided in the width direction and which extend from one edge to the other of the roof or the roof section. 18. Roof structure according to claim 17, characterized in that rods (42) extend from one of the edges (39) to the other via the lower end (43) of a first outer intermediate support (35) and the lower end (43) of a second outer intermediate support (35) extend away, which intermediate supports (35) are essentially symmetrical are arranged in the width direction, and between which intermediate supports the bars (42) are substantially - -te- - run horizontally, and that bars C37) extend from one Edge (39) to the other edge (39) over the upper end (40) of the first outer intermediate support (35), the lower one End (4l) of at least one intermediate support (36) between the outer intermediate supports (35) is arranged, and the upper end (40) of the second outer intermediate support (35) extend away. 19 · Roof structure according to one of the preceding claims, characterized in that two or more roof portions are arranged side by side in the width direction. 20. Roof structure according to claim 19, characterized in that each roof section is biased by the rods in an arched shape or arch shape, that the curvatures of the sections adjoin one another so that a substantially continuous curvature is formed, and that each section at its edges an upper bar holder (55, 56) on the end face (57, 58) of the sheet metal and a lower bar holder (59, 60) in connection with the end face (57, 58) of the sheet metal, and that in each section the bars (62 ) preferably from an upper rod holder (55) on one edge (53) to an upper rod holder (56) on the other edge (5 ¹ O via the lower end (63) of a first (64) and a second (65) outer intermediate support and that in each section rods (66) preferably extend from a lower rod holder (59) on one edge (53) to a lower rod holder (60) on the other edge (5 * 0 over the upper end ( 67) the first (64) and the second n (65) outer intermediate supports extend away, and that rods (68) extend preferably substantially horizontally between the outer free edges (53) of the two outer sections. 21. Roof structure according to one of the preceding claims, characterized in that components, such as For example, intermediate supports (11, 25, 26, 35, 36, 51, 52, 64, 65) are provided through which the sheet metal (1, 32) can be provided with an additional wave shape (l ^! ) In its width direction, at least on those parts of the sheet metal (1, 32) _; which lie between the longitudinal edges (5 ₅ 6, 21, 23 , 53 _} 5 ¹ O, the wave shape (1 ·) having a significantly greater wavelength than the corrugation or ribbing of the sheet metal and whereby additional stiffening is achieved. 22. Roof construction according to claim 21, characterized in that the wave shape (1 ^! ) Is applied at least to a certain extent on the longitudinal edges (5, 6, 21, 23, 53, 54). 23. Roof structure according to claim 21 or 22, characterized in that supports are only for supporting of the sheet metal are provided and that thereby the rigidity of the corrugated or ribbed and additionally with the wave shape provided sheet metal is used directly to increase the unsupported length.