EP4640971A1

EP4640971A1 - Prefab roof construction

Info

Publication number: EP4640971A1
Application number: EP25172429.0A
Authority: EP
Inventors: Bas Vreeswijk; Martijn Hendrik Monné; Richard Bernardus Johannus Snoek
Original assignee: Kappi BV
Current assignee: Kappi BV
Priority date: 2024-04-25
Filing date: 2025-04-24
Publication date: 2025-10-29
Also published as: NL2037543B1

Abstract

The invention relates to a prefabricated roof construction comprising a number of roof segments (1,2,3,4) in which each of the roof segments is hinged with one or two other of the roof segments. In a first state, the roof segments are in line with each other and in a second state, each of the roof segments is at a non-straight angle with the one or two other roof segments linked to it. In a version, the roof segments can be made dimensionally stable by means of clamping plates.

Description

Prefab roof structures are widely known. They are used in construction to provide a building with a roof relatively quickly. Because the roof structures are custom-built in a factory, they can be assembled relatively quickly on the construction site. However, the technicians have to put each element in place separately with a crane.
It is a purpose of the present invention to provide a prefabricated roof structure in which all elements can be placed at the same time, and which prefabricated roof structure as a whole can be easily transported.
This goal is achieved with a prefabricated roof construction comprising a number of roof segments wherein each of the roof segments is hinged with one or two other of the roof segments, wherein in a first state the roof segments are in line with each other and in a second state each of the roof segments is at an unstretched angle with the one or two other roof segments linked to it.
By connecting the roof segments before they are transported, it is even easier to bring the whole thing into the second state, the construction condition. Because the roof constructions lie completely flat in the first state, the transport position, they are easy to stack and therefore compact to transport.
In an embodiment, the roof construction consists of at least three roof segments that are arranged in a row in the first state, and in the second state a first and/or a last of the row α make an angle with the vertical for which 0 ≤ α ≤ 30 degrees applies.
With the correct length of the two extreme roof segments, combined with a relatively small angle (0 ≤ α ≤ 30) to the vertical, a higher upstand is possible for much more usable space under a sloping roof. In practice, this was always difficult to implement. For example, raising a wall plate can only be done up to a maximum of 30 centimeters;
In an embodiment, the roof construction consists of at least three roof segments, of which at least one middle roof segment in the second state makes an angle with the vertical that is greater than the angle with the vertical of the first and/or last roof segment. In such a construction, the first and last roof segments create height (due to a small angle with vertical) and the middle roof segment(s) bridge the length (due to a larger angle with vertical). This can provide a very wide canopy that is relatively low, but provides sufficient gross floor area.
In a form of execution, the roof construction comprises at least one folding coupling plate for the hinged coupling of two of the roof segments at a top. As an alternative, one or more hinges can be used. A combination of hinges and foldable coupling plates is also possible. The term 'top' refers to the side of the roof segments that is facing outwards in the second state.
In an embodiment, the roof construction comprises fixatives for the dimensionally stable of two linked roof segments in the second state. Since the segments retain their shape after installation in the building condition (i.e. second state), the roof as a whole will be dimensionally stable and solid. The fixatives can comprise one or more folding fixative plates, such as foldable metal plates.
In an embodiment, the one or more foldable fixing plates are attached to a bottom of the roof segments. If the roof segments are manufactured as so-called 'boxes' with base plates and top plates with insulation in between, the fixing plates can be attached to the bottom plates, and preferably to the top of the bottom plates so that the fixing plates are not visible at the bottom of the roof.
In an embodiment, each of the one or more folding fixing plates is fixed in the first state to only one of the two linked roof segments with first fasteners, and attached in a sliding manner to the other of the two linked roof segments. The first fasteners may comprise screws, nails or nails, or other suitable fasteners.
In one version, the roof structure comprises second fasteners for securing the one or more folding fixing plates to the other of the two linked roof segments in the second state. The second fasteners may comprise screws, nails or nails, or other suitable fasteners.
In an embodiment, the roof structure comprises at least one tensioning device that is designed to tension, in the second state, one of the folding fixing plates at the folding line towards a hinge point of the two linked roof segments. By tightening, i.e. tightening, a fixing plate on the fold line towards the pivot point, it is possible to minimize any play between the fasteners and the fixing plate that may still be present after fixing in the second state.
In an embodiment , at least one tensioning device comprises lashing devices that engage with one of the folding fixing plates at the folding line, and anchoring devices that engage with one top of the roof segments at the hinge point, wherein the anchoring devices are designed to anchor the lashing devices to the top of the roof segments.
In a form of execution, the tensioning devices comprise a bolt and a pressure element, wherein the bolt protrudes with one end through an opening of one of the folding fixing plates, and wherein the pressure element is arranged around the bolt on one side of the fixing plate facing the underside of the roof structure. The bolt can easily be tightened by a mechanic in order to tighten the tensioning device and remove any play from the fixing plate. This improves the dimensionally stable connection of the two roof segments.
In an embodiment, the anchoring means a profile, for example metal, consisting of five straight sections, the middle three sections of which are arranged in a substantially triangular shape, and wherein the extreme sections are optionally connected to the top of the roof segments at the hinge point. In this case, one middle of the five straight sections of the profile can be provided with an opening to receive at least part of the tightening equipment. For example, if the tightening devices comprise a bolt, this bolt can be threaded at this end with a nut on which a nut is mounted, which absorbs the tightening forces.
In a form of execution, each of the roof segments comprises a flat top plate and a flat floor plate at a distance from it. By creating a space between the top plate and bottom plate, a space is created for insulation material. This increases the insulation value of the roof. It should be noted that the invention is not limited to roof segments with insulation material.
In a version, at least one of the roof segments comprises trapezoidal side walls. By making the side walls, and therefore the sides, of the roof segments trapezoidal, the side walls will connect to each other in the second state, if provided with the correct angles and dimensions. It is noted that the roof segment, or some of the roof segments, can also be rectangular. However, the rectangle is seen as a specific variant of the trapezoid, in which both pairs of opposite sides run parallel.
These and other aspects of the invention are apparent from, and will be explained on the basis of, the embodiments described below, with reference to the attached drawings, in which they show:

Figure 1 a side view of a prefabricated roof construction according to an embodiment of the invention;
Figure 2 a top view of the prefabricated roof construction of Figure 1;
Figure 3 a side view of a stack of prefabricated roof constructions according to an embodiment of the invention;
Figure 4 a side view of the prefabricated roof constructions of Figure 1 in a second state;
Figure 5 a side view of a prefabricated roof construction according to a further embodiment;
Figure 6 a side view of a prefabricated roof construction according to a further version;
Figure 7 a side view of a prefabricated roof construction according to a further embodiment;
Figure 8 shows a side view of a prefabricated roof construction according to yet another form of execution;
Figure 9 a side view of a prefabricated roof construction according to yet another embodiment;
Figure 10 an openwork top view of two linked roof segments according to a form of execution in the first state;
Figure 11 a cross-section of the roof segments of Figure 10 in the plane XI-XI;
Figure 12 an openwork side view of the two segments from Figure 11, but in the second state;
Figure 13 a cross-section of the two roof segments of the prefabricated roof construction according to a further embodiment of the invention;
Figure 14 the tensioning device of Figure 13 positioned between the two roof segments;
Figure 15 a cross-section of two coupled roof segments in the second state according to an embodiment of the invention, and
Figure 16 a perspective of part of the embodiment of Figure 13.

Figure 1 shows a side view of a prefabricated roof construction 10 according to an embodiment of the invention. The prefab roof construction 10 consists of a number of roof segments 1,2,3,4, each of which is hinged with one or two other roof segments. The roof segments 1,2,3,4 are linked to each other at the top at the hinge points 5,6,7.
Figure 1 shows the roof structure 10 in a first state in which the roof segments 1,2,3,4 are in line with each other. It should be noted that in this embodiment, the roof segments 2 and 3 have a greater thickness D2 than the roof segments 1 and 4, i.e. D2 > D1. However, the thicknesses can also all be the same, or each roof segment can have its own thickness depending on the roof that is desired. In this version, all roof segments have a trapezoidal side. The reason for this form will be explained on the basis of figures 4-9. In a trapezoidal shape, at least two opposite sides are parallel to each other. In this example, the top and bottom of each roof segment are parallel. However, it is conceivable that the top and bottom of the roof segments are not parallel; again, this depends on what type of roof construction is desired.
Figure 2 shows a top view of the prefabricated roof construction 10 of Figure 1. In this embodiment, all roof segments have the same width B. The roof segments 1 and 4 have the same length, i.e. L1 = L4, and the roof segments 2 and 3 also have the same length, i.e. L2 = L3. As shown in Figure 2, all roof segments have a rectangular shape when seen from the top.
Figure 3 shows a side view of a pile of 20 of prefabricated roof structures 10 according to an embodiment of the invention. The stack 20 is placed on a wagon 21, and can therefore be transported. Figure 3 also shows a number of support blocks that are 10 between the roof constructions at the roof segments that have a thickness D2, see also Figure 1. By choosing the thickness of the support blocks appropriately, the roof structures can be transported in the first condition as shown in Figure 1, and easily stacked. With each installation of a further roof construction, a horizontal surface is created, on which the next roof construction can easily be placed. This provides a very compact way of transporting and storing the prefab roof structures.
Figure 4 shows a side view of the prefab roof construction 10 of Figure 1, but in a second state in which each of the roof segments is at a non-straight angle with the attached roof segments. Each of the roof segments makes an angle of less than 180 degrees with the attached roof segments. This second condition is also called the building condition or final state. In this final state, the roof construction can be placed on an underlying building construction or floor. Several of the roof constructions 10 can be placed next to each other to cover the right space. For example, if a room with a width of 14 meters is to be covered, and the width B of the prefabricated roof structures is 2 meters, then 7 roof structures will be sufficient to realize a complete roof. In this version, the extreme roof segments 1 and 4 are mainly arranged vertically, i.e. the angle α with the vertical is mainly 0 degrees.
Figure 5 shows a side view of a prefabricated roof construction 30 according to a further embodiment. This version also consists of four roof segments, see roof segments 31, 32, 33, 34. Such a roof is also called a mansard roof. Figure 5 shows that the extreme roof segments 31 and 34 are at an angle α the vertical. In this example, the angle α = 25 degrees. In a form of execution, the angle α is between 0 ≤ α ≤ 30 degrees. The advantage of such corners is that, if they are combined with the values for the L1 and L4 lengths that are at least 1.5 m, a living space is created close to the roof segment. This increases the gross floor area of the floor.
Figure 6 shows a side view of a prefabricated roof construction 40 according to a further embodiment. This version also consists of four roof segments, see roof segments 41,42,43,44. Figure 6 shows that the extreme roof segments 41 and 44 are vertical in the building condition and the roof segments in between are sloping. Such a roof construction is also called a barn roof.
Figure 7 shows a side view of a prefabricated roof construction 50 according to a further embodiment. This type of version consists of only two roof segments, see roof segments 51.52. This construction results in a so-called gable roof.
Figure 8 shows a side view of a prefabricated roof construction 60 according to yet another embodiment. This version consists of three roof segments, see roof segments 61,62,63. Figure 8 shows that the extreme roof segments 61 and 63 are vertical and the (middle) roof segment 62 in between is horizontal.
Figure 9 shows a side view of a prefabricated roof construction 70 according to yet another embodiment. This type of version consists of three roof segments, see roof segments 71,72,73. Figure 9 shows that the extreme roof segments 71 and 73 are vertical and the (middle) roof segment 72 in between is sloping. This construction is also called a pent roof.
It is noted that the above-mentioned roof constructions can be placed directly on a foundation instead of on a building to form an entire house directly, together with further roof constructions placed next to it.
Figure 10 shows an openwork top view of two linked roof segments 81.82 according to a design in the first state. The two roof segments 81.82 are hingedly coupled to each other over a connecting line 83. In this version, each roof segment 81.82 comprises a floor plate 84.85, and a number of side walls 86, 87, 88, 89. The side walls 86 and 87 of roof segment 81 are connected to each other with a wall 90. The side walls 88 and 89 of roof segment 82 are connected to each other with a wall 91. Instead of walls 90, beams can be used that connect two side walls at the top. Beams may also have been placed (not shown in the figure) on both sides of the connecting line 83 to connect the side walls there.
The two roof segments 81.82 are hinged coupled with two folding coupling plates 92.93. In an embodiment, the folding coupling plates are 92.93 metal strips and coupling plate 92 is mounted on the side walls 86.88 at the top, and coupling plate 93 is mounted on the side walls 87.89 at the top.
The two roof segments 81.82 are connected at the bottom using fixatives. In Figure 10, the roof segments are fixed with two folding fixing plates 94.95. In a version, the fixing plates are metal plates that are firmly attached to the base plate 85, and between the bottom plate 84 and a partition wall 96 is sliding.
Figure 11 shows a cross-section of the roof segments 81.82 of Figure 10 in the plane XI-XI. Figure 11 also shows top plates 97.98. The cross-section has been chosen in such a way that the folding plate 95 can be seen. The fixing plate 95 is attached to the base plate 85 of roof segment 82 using, for example, screws 99 or other fasteners. Figure 11 clearly shows that in the other roof segment the fixing plate 95 is installed between the bottom plate 84 and a partition wall 96. However, this fixing plate 95 is not yet attached to that roof segment in the first state as shown in Figures 10 and 11.
Figure 12 shows an openwork side view of the two segments from Figure 11, but in the construction condition. The two segments 81.82 are folded so far towards each other that their ends touch each other. In Figure 12, the side walls 87.89 have been omitted so that the other side walls 86.88 are visible and also the interior of the structure. The roof construction comprises the fixatives mentioned above for making two linked roof segments dimensionally stable in the second state. In the second state, coupling plate 93 is folded. Fixing plate 95 is also folded and moved further between the bottom plate 84 and the partition wall 96.
After the two roof segments have been folded towards each other, as shown in Figure 12, a technician can secure the fixing plate 95 to the base plate 84 using suitable fasteners, e.g. with screws. In an embodiment, there are no holes in the fixing plate 95 yet, but these are created during assembly by screwing in the screws from the underside of the roof segment 81. Preferably there are already holes in the bottom plate 84 so that the mechanic knows where to install the screws.
After the fixing plates have been fixed, a dimensionally stable connection is created between the two roof segments. In this way, the various roof segments of a prefabricated roof construction can be made dimensionally stable.
Instead of the folding coupling plates 92.93, hinges are used in another version that are attached to both of the two coupled roof segments. The roof segments can also be connected in a few places by means of coupling plates and, for example, only in the ridge of the roof with a hinge.
The fixing plates and coupling plates are preferably made of metal, for example steel or aluminium. Other materials are conceivable such as leather or fiber-reinforced plastic. The walls of the roof segments shown are preferably made of wood such as plywood or plywood wood boards. Wood is a relatively light and strong material and very suitable for such roof constructions. It should be noted that the invention is not limited to roof segments wherein the top plate and bottom plate are at a distance from each other, but roof segments that are compactly manufactured can also be used.
In the versions shown, each of the roof segments comprises a flat top plate and a flat floor plate at a distance from it. This distance creates an indoor space in which insulation material can be applied. The application of suitable insulation material increases the insulation value of the roof segments.
Some building regulations require that the roof insulation be higher than the wall insulation. This may be a reason to reduce the thickness of the vertical roof segments of the prefab roof construction than the intermediate segments that will form the roof in the second state, see also Figures 1, 4 and 9.
Figure 13 shows a cross-section of the two roof segments 81.82 of the prefabricated roof construction according to a further embodiment of the invention. In this version, the roof structure comprises one or more tensioning devices that are fitted to further tighten the fixing plates 95 in the second state of the roof structure.
The tensioning device 101 as shown in Figure 13 is positioned between the two roof segments and is shown in more detail schematically in Figure 14. The tensioning device 101 comprises a bolt 102 and a pressure element 103 attached to it. The pressure element has an internal bore through which the bolt 102 can protrude. At one end, the bolt has a fixed head 108. At another end of the bolt 102 is a nut 105. The tensioning device 101 also comprises a triangular profile 104 that is slightly open in one corner in the unforced state. This creates two ends of the triangular profile 104 which ends are both connected to two straight legs 106,107. The triangular profile 104 together with the legs 106,107 can also be seen as two Z-profiles connected on one side. It should be noted that the nut 105 can be replaced by a thickening of the bolt that may be attached to the triangular profile 104 to prevent the bolt 102 from turning in relation to the profile 104. In that case, the head 108 of the bolt 102 is replaced by a nut that can be tightened.
As shown in Figure 13, the legs 106,107 are positioned on a top side of the roof structure and can be fixed on it. The triangular profile 104 is pressed into a triangle shape. For example, the profile 104,106,107 can be made from a folded metal strip in which an opening is made for the bolt 102. As in the embodiment of Figures 13 and 14, the pressure element 103 has a round side facing the fixing plate 95. This round side of the pressure element 103 can exert pressure in the fold of the fixing plate 95, whereby the pressure element 103 can be further tightened as required. For example, the pressure element 103 can be made of steel or another relatively hard material. To ensure that the pressure element 103 presses into the fold of the fixing plate 95, the fixing plate 95 has a hole in the right place through which the bolt 102 protrudes, also shown in the first (unfolded) state in Figure 13.
Figure 15 shows a cross-section of two linked roof segments 151,152 in the second state according to an embodiment of the invention. In this version, a first roof segment 151 is bevelled at the coupling end, and a second roof segment 152 is straight at the coupling end. Coupling end refers to those ends to which the roof segments are connected to each other. It will be clear that the angles that the coupling ends of the roof segments make with the longitudinal direction of the roof segments determine the angle that the segments make with each other in the second state.
The roof segments 151.152 each comprise a base plate 153, a top plate 155.156 and an insulation layer 157.158 in between. Instead of top plates, there may also be a foil applied to the top. Furthermore, the roof segments 151,152 each comprise a reinforcement beam 159,160 that extend perpendicular to the drawing plane. These reinforcement beams 159,160 connect the two side walls of each of the roof segments near the coupling ends.
In this version, the two roof segments 151.152 are mounted dimensionally stable using the tensioning device 101 as shown in Figure 14. The tensioning device 101 is hinged anchored by mounting the feet/legs 106,107 on the beams 159,160. The bolt 102 of the tightening device 101 extends through a hole (not shown in Figure 15) of the fixing plate 95. The tensioning device 101 is only tightened after the fixing plate 95 has been secured to the roof segment 151. As mentioned above, this can be done with various fasteners such as screws, nails or nails.
An advantage of the tightening device is that the possible play in the connection between the fixing plate 95 and the roof segments 151.152 is eliminated by tightening the head 108 of the bolt 102. This creates a solid dimensionally stable coupling between the two roof segments.
Other ways of tightening are conceivable. For example, the bolt 102 shown in Figure 14 can be run longer, wherein the nut 105 can be secured to a top of the roof segments. This can be done with an extra anchor or folding plate with a hole in it for receiving part of the bolt 102. However, the advantage of the triangular profile 104 shown is that it leaves the direction of the bolt 102 free. This is because the profile 104 is slightly hinged in the place between the legs 106,107 and the triangular profile 104.
Figure 16 shows a perspective face of part of the embodiment of Figure 13. In Figure 16, the top plates of the roof segments have been removed so that details of the roof construction can be shown at a transition between two roof segments in the first state. Figure 16 shows the bottom plates 84.85 and the intermediate plate 96. The fixing plate 95 is fixed to the base plate 85 using screws 99. An opening 161 is made in the fixing plate through which the bolt 102 runs. The fixing plate 95 is attached to the other roof segment in a sliding way. In this example, the fixing plate is slid between the base plate 84 and the intermediate plate 96. If the roof structure is moved to the second state, the fixing plate 95 will slide further between the base plate 84 and the intermediate plate 96.
Figure 16 also shows two reinforcement beams 162,163. Reinforcement beam 162 is coupled between two side walls of one of the segments, one of which is shown in the figure, see side wall 165. In the same way, the reinforcement beam 163 is connected between two side walls of the other roof segment, one of which is shown in the figure, see side wall 166.
In this version, the reinforcement beams 162.163 are right next to each other. In the first state, they only touch each other at a fold line 167 at the top, because they both have beveled sides at their interfaces (not visible). The interfaces are at an angle that corresponds to the angle that the segments in question make with the longitudinal direction of the segments. By suitable chamfering of the coupling surfaces of the reinforcement beams 162,163, a space is created between these beams in the first state. In the second state, after hinges, there is little or no space between beams and the interfaces of the reinforcement beams meet.
In the embodiment form of Figure 16, the roof segments are connected to each other with coupling plates, one of which is visible, see coupling plate 168. This coupling plate 168 extends over part of the side walls 165 and 166. In this example, the coupling plate 168 also comprises some side flaps, see side flap 169, which are screwed to the side of the side walls 165.166. As a result, coupling plate 168 is firmly attached to the side walls 165.166 and thus to the respective roof segments. The coupling plate 168 can also comprise further side flaps, two of which can be attached under the legs 106,107 of the tensioning device.
In the version shown, the tensioning device is arranged in the interior of a roof segment. This means that it is not visible from the outside, except for the head 108 (not visible) of the bolt 102. Because preferably the bottom plates 84.85 connect to each other in the second state, and there must be room for the pressure element 103 at the place where it touches the fixing plate, a notch is provided in the bottom plate 85 at the place under the hole 161 in the fixing plate (not visible in the figure). This notch provides space for the pressure element 103 in the second state.
The present invention is described above on the basis of a number of versions as shown in the drawings. Modifications and alternative implementations of some parts or elements are possible and fall within the scope of protection as defined in the attached conclusions. It is noted that the above-mentioned embodiments poorly illustrate the invention and do not limit it, and that the skilled person will be able to design many alternative embodiments. In the conclusions, reference marks in brackets should not be interpreted as limiting the claim. The use of the verb "to comprise" and its conjugations does not exclude the presence of elements or steps other than those mentioned in a claim. The article "a" which precedes an element does not exclude the presence of several such elements. The mere fact that certain characteristics are mentioned in different dependent conclusions does not mean that a combination of these measures cannot be used to an advantage.

Claims

Prefabricated roof construction comprising a number of roof segments (1,2,3,4), wherein each of the roof segments is hinged with one or two other of the roof segments, wherein in a first state the roof segments are in line with each other and wherein in a second state each of the roof segments is at a non-straight angle with the linked one or two other roof segments.
Prefabricated roof construction according to claim 1, wherein the roof structure comprises at least three roof segments arranged in a row in the first state, and where, in the second state, a first and/or a last roof segment of the row α make an angle with the vertical for which 0 ≤ α ≤ 30 degrees applies.
Prefabricated roof construction according to claim 1 or 2, wherein the roof structure comprises at least three roof segments wherein at least one middle roof segment in the second state makes an angle to the vertical that is greater than the angle to the vertical of the first and/or last roof segment.
Prefabricated roof construction according to one or more of the preceding claims, wherein the roof construction comprises at least one hinge for the hinged coupling of two of the roof segments at a top.
Prefabricated roof construction according to one or more of the preceding claims, wherein the roof construction comprises at least one folding coupling plate for the hinged coupling of two of the roof segments at a top.
Prefabricated roof construction according to one or more of the preceding claims, wherein the roof construction comprises fixatives for the dimensionally stable of two linked roof segments in the second state, wherein the fixatives comprise one or more folding fixation plates.
Prefabricated roof construction according to claim 6, wherein the one or more folding fixing plates are installed on a side of the roof segments or wherein the one or more folding fixing plates contain metal.
Prefabricated roof structure according to claim 6 or 7, wherein each of the one or more folding fixing plates is fixed in the first state to only one of the two linked roof segments with first fasteners (99), and is slidingly attached to the other of the two linked roof segments, optionally wherein the roof structure comprises second fasteners (100) for securing one or more folding fixing plates to the other of the two Linked roof segments in the second state.
Prefabricated roof structure according to one or more of claims 6-8, wherein the roof structure comprises at least one tensioning device (101) designed to tension, in the second state, one of the folding fixing plates at the fold line towards a hinge point of the two linked roof segments.
Prefabricated roof construction according to claim 9, wherein at least one tensioning device (101) comprises tensioning devices (102,103) that engage one of the folding fixing plates at the folding line, and comprises anchoring devices (104,106,107) that engage at a top of the roof segments at the hinge point, wherein the anchoring devices are arranged to anchor the tensioning devices to the top of the roof segments.
Prefabricated roof construction according to claim 10, wherein the tightening means comprise a bolt and a pressure element (103), wherein the bolt protrudes with one end through an opening of one of the folding fixing plates, and wherein the pressure element (103) is arranged around the bolt (102) on one side of the fixing plate facing the underside of the roof structure.
Prefabricated roof construction according to claim 10 or 11, wherein the anchoring devices comprise a profile, e.g. made out of metal, comprising five straight sections, the middle three pieces of which (104) are arranged in a substantially triangular shape, and wherein the extreme sections are optionally connected to the top of the roof segments at the hinge point.
Prefabricated roof construction according to claim 12, wherein one middle of the five straight sections of the profile is provided with an opening to receive at least part of the tensioning equipment (102).
Prefabricated roof construction according to one or more of the preceding claims, wherein each of the roof segments comprises a flat top plate and a flat base plate at a distance from it.
Prefabricated roof construction according to one or more of the preceding claims, wherein at least one of the roof segments comprises trapezoidal side walls.