WO2010085148A1

WO2010085148A1 - Greenhouse and foundation element for the forming thereof

Info

Publication number: WO2010085148A1
Application number: PCT/NL2010/050030
Authority: WO
Inventors: Allard Van Der Meer
Original assignee: P.L.J. Bom Holding B.V.
Priority date: 2009-01-21
Filing date: 2010-01-20
Publication date: 2010-07-29
Also published as: NL1036439C2

Abstract

The invention relates to a greenhouse (1) for glass horticulture, comprising a foundation which comprises a number of foundation elements (2), and columns (2) which in assembled situation support at least one glass roo(5)f, and wherein each column (3) is associated in each case with one of the foundation elements. The greenhouse (1) according to the invention is distinguished in that the foundation elements (2) comprise an elongate profile (13), wherein the profile (13) is constructed substantially from a fibre -reinforced plastic.

Description

GREENHOUSE AND FOUNDATION ELEMENT FOR THE FORMING THEREOF

The invention relates to a greenhouse for glass horticulture, comprising a foundation which comprises a number of foundation elements and columns which in assembled situation support at least one glass roof and wherein each column is associated in each case with one of the foundation elements.

Such greenhouses are known. In the known greenhouses the foundation elements are concrete piles. There is a trend in glass horticulture for greenhouses to have increasingly large dimensions. The forces transmitted through the concrete piles and the columns herein become increasingly large. The demands made of the concrete piles are also increasing as a result . This results in practice in an increase in the size, and thereby the weight, of the concrete piles.

The increase in the weight of a concrete pile is particularly disadvantageous during the construction of the greenhouse. The weight which can be lifted by workers building the greenhouse without physical damage occurring is limited. In some cases a limit to this weight may be laid down in labour legislation. This likewise applies for the means which are utilized, for instance transport and hoisting means. As the weight of the concrete piles increases, more workers, more means and/or heavier means will hereby have to be utilized to enable placing of the concrete piles.

The invention has for its object to alleviate this drawback .

The invention is distinguished for this purpose in that the foundation elements comprise an elongate profile, wherein the profile is constructed substantially from a fibre-reinforced plastic. This measure makes it possible to realize a foundation element with a relatively low weight. When a foundation element according to the invention is used instead of a known concrete pile, the weight of the foundation element can be kept lower as the dimensions of greenhouses increase . This has the advantage for instance that the people or machines placing the foundation elements can be subjected to smaller loads. Furthermore, this for the advantage instance has that when the foundation element is placed in a concrete pedestal foot, the foundation element is less likely to sink into the soft concrete and the orientation is easier to correct, whereby the dimensional accuracy of the greenhouse can be increased. In addition, this measure makes it possible to realize a foundation element with a size which is smaller than that of a comparable concrete pile. As dimensions of greenhouses increase, the drawback of the increase in the size of a known concrete pile, and thereby the loss of valuable usable ground surface, can for instance hereby be reduced. Foundation elements of a smaller size and weight also take up less transport space, whereby the costs of transporting the foundation elements during the construction of the greenhouse can be reduced.

This measure moreover makes it possible to realize a foundation element which can better withstand unintentional collisions with the vehicles which during construction of the greenhouse must drive between the concrete piles already placed in the ground in order to carry out work. The known concrete piles have the drawback that they do not withstand well the unintended collisions during the construction of the greenhouse, and become damaged as a result. Each damaged concrete pile must be repaired, wherein in the worst possible case the whole concrete pile, including the concrete prop (pedestal foot) with which it is anchored into the ground, must be replaced, this representing high additional costs which must be borne by the builder of the greenhouse. This drawback is alleviated by applying the foundation element according to the invention. Each of these advantages of the foundation pile according to the invention contributes toward the possibility of the total cost of arranging the foundation of the greenhouse, according to the invention, including the cost of repairing damaged foundation elements, being lower than the total cost of arranging a foundation with concrete piles.

In a favourable embodiment of the greenhouse according to the invention the fibre-reinforced plastic comprises fibres extending substantially in the longitudinal direction of the profile. This measure makes it possible to realize a foundation element with very good mechanical properties, which can moreover be manufactured in simple manner and at low cost . This measure moreover makes it possible to realize a foundation element which provides great resistance to the lateral forces occurring when such a foundation element is in collision with a vehicle, for instance during construction of the greenhouse. This has the advantage that fewer foundation elements need be replaced during construction of the greenhouse, and the costs of the foundation of the greenhouse can thereby be lower. In a favourable embodiment hereof the length of the individual fibres extending in the longitudinal direction is substantially the length of the elongate profile. The long fibres in one piece provide the foundation element with a particularly high resistance to lateral forces which occur when a vehicle collides with such a foundation element, for instance during construction of the greenhouse .

In an additional or alternative embodiment of the greenhouse according to the invention, wherein the fibre-reinforced plastic comprises fibres extending substantially in the longitudinal direction of the profile, the fibre-reinforced plastic comprises fibres which extend substantially in the peripheral direction of the elongate profile. This measure also makes it possible to realize a foundation element with very good mechanical properties, which can moreover be manufactured in simple manner and at low cost . In a further embodiment hereof the individual fibres extending in the peripheral direction are wound helically a number of times round the periphery. The long fibres wound a number of times round the periphery impart particularly good mechanical properties to the foundation element.

In a further embodiment of the greenhouse according to the invention the profile is hollow. This measure enables a strong and particularly light embodiment of the foundation element . This measure does not alter the fact that the hollow profile can be filled with for instance concrete in the assembled situation in order to increase the rigidity of a foundation element . This latter can for instance be favourable in the case of foundation elements which support cross brace columns.

In a favourable embodiment of the greenhouse according to the invention the profile is a profile realized by means of pulltrusion. This measure makes it possible to manufacture the profile at exceptionally favourable cost. Elongate profiles of fibre-reinforced plastic with fibres extending substantially in the longitudinal direction of the profile are highly suitable for manufacture by means of pulltrusion. Elongate profiles of fibre-reinforced plastic with fibres extending substantially in the peripheral direction of the profile are highly suitable for manufacture by means of a special form of pulltrusion which is also referred to as pullwinding.

In a further embodiment of the greenhouse according to the invention a mat is arranged on the surface of the profile along the longitudinal direction thereof, with fibres oriented at a random angle relative to the longitudinal direction of the profile. The fibre mats can be arranged during the pulltrusion process. This measure makes it possible to further improve the mechanical properties of the foundation element. This measure forms an exceptionally good combination with a pulltrusion profile, since the fibre mats can be arranged in simple manner after the pulltrusion process.

In a further embodiment of the greenhouse according to the invention the upper side in assembled situation of the profile wall forms a bearing surface, and each column is connected to the associated foundation element by means of a connecting element, wherein the connecting element is in contact with substantially the whole bearing surface of at least a part of the profile wall . This measure makes it possible to distribute the forces over the bearing surface of the profile, thereby preventing the fibres breaking out of the plastic carrier due to local loading thereof in lengthwise direction thereof . This has the advantage that the same foundation element can transmit higher compression forces resulting from the weight and load of the glass roof, and the foundation element can hereby take a_. lighter and therefore less expensive form, so that the foundation element comprising a profile constructed substantially from fibre-reinforced plastic can compete with a concrete foundation element. In a further embodiment hereof the connecting element is in contact with substantially the whole bearing surface of the profile wall. This measure makes possible an optimal distribution over the bearing surface of the forces to be transmitted through the foundation. This has the advantage that the foundation element can be given an exceptionally light and therefore inexpensive form.

In a further embodiment of the greenhouse according to the invention with a connecting element between a column and an associated foundation element the connecting element comprises, at least in the assembled situation, a positioning leg which in the assembled situation extends in the longitudinal direction of one of the column and the foundation element, and forms a positioning surface against which at least one of the column and the foundation element can be placed for the purpose of positioning thereof . This measure makes it possible to limit the movement of the column or the foundation element relative to the connecting element in a direction perpendicularly of the lengthwise direction of the column and the foundation element. This has the advantage for instance that the mounting of the column on the connecting element is simpler and that, after assembly, an unintended change in the position of the column or the foundation element relative to the connecting element is prevented. In a further embodiment hereof the connecting element comprises at least one positioning leg for each of the column and the foundation element . This measure makes it possible to limit the movement of the column relative to the foundation element in a direction perpendicularly of the lengthwise direction of the column and/or the foundation element. This has the advantage for instance that the mounting of the column on the foundation element is simpler and that, after assembly, an unintended change in the position of the column relative to the foundation element is prevented. In a further embodiment of the greenhouse according to the invention with a connecting element having a positioning leg, the connecting element comprises more than one positioning leg for positioning more than one size of at least one of the column and the foundation element. This measure makes it possible for the connecting element to be suitable for more than one size of the column and/or the foundation element. This has the advantage that only one connecting element need be stocked for more than one size of column and/or foundation element.

In a further embodiment of the greenhouse according to the invention with a connecting element, the connecting element comprises, at least in the assembled situation, a coupling leg which extends in the longitudinal direction of one of the column and the foundation element in the assembled situation, and coupling means for coupling the coupling leg to at least one of the column and the foundation element. This measure makes it possible to limit the movement of the column and/or the foundation element relative to the connecting element in the longitudinal direction of the column and the foundation element . This has the advantage for instance that the assembly of the column and/or the foundation element with the connecting element is simpler and that after assembly an unintended change in the position of the column or the foundation element relative to the connecting element is prevented. In a further embodiment hereof the connecting element comprises at least one coupling leg for each of the column and the foundation element . This measure makes it possible to limit the movement of the column relative to the foundation element in the longitudinal direction of the column and/or the foundation element. This has the advantage for instance that the mounting of the column on the foundation element is simpler and that after assembly an unintended change in the position of the column relative to the foundation element is prevented. In a further embodiment of the greenhouse with a connecting element having a positioning leg and a coupling leg, the positioning leg forms the coupling leg. This measure enables a simple embodiment of the connecting element with both a positioning leg and a coupling leg. This has the advantage that the connecting element can be manufactured in simple manner and thereby at low cost .

In a further embodiment of the greenhouse according to the invention with a connecting element, the connecting element comprises a plate-like element, wherein in assembled situation a part of the surface of the plate-like element is in contact with the bearing surface . This measure enables a simple embodiment of the connecting element. This has the advantage that the connecting element can be manufactured in simple manner and thereby at low cost.

In a further embodiment of the greenhouse according to the invention, wherein the connecting element comprises between the column and the associated foundation element a plate-like element and a coupling leg for each of the column and the foundation element, the coupling legs are formed by means of a coupling element which extends in use through an opening in the plate-like element on both sides of the plate-like element. This measure makes it possible for the connecting element to consist of a plurality of parts, for instance a flat plate-like part and an elongate beam-like part. This has the advantage that the connecting element takes up less storage space before assembly thereof. The invention also relates to a foundation element for forming a greenhouse according to the invention, comprising an elongate profile, wherein the profile is constructed substantially from a fibre-reinforced plastic.

The invention also relates to a connecting element for forming a greenhouse according to the invention as described above with a connecting element.

The invention also relates to a greenhouse for glass horticulture, comprising a foundation which comprises a number of foundation elements, and columns which support at least one glass roof in the assembled situation, wherein each column is associated in each case with one of the foundation elements, wherein the foundation elements comprise an elongate profile, wherein the profile is constructed substantially from a plastic and wherein at least a part of the upper surface in assembled situation of the profile forms a bearing surface, and each column is connected to the associated foundation element by means of a connecting element, wherein the connecting element is in contact with substantially the whole bearing surface, in a favourable embodiment hereof substantially the whole upper surface in the assembled situation of the profile forms the bearing surface. The measure of the connecting element makes it possible to avoid the profile being damaged by local loads. This has the advantage that the same foundation element can transmit higher compression forces resulting from the weight and load of the glass roof, and the foundation element can hereby take a lighter and therefore less expensive form, so that the foundation element comprising a profile constructed substantially from plastic can compete with a concrete foundation element.

The present invention will be further elucidated hereinbelow with reference to exemplary embodiments shown in the accompanying drawing. These are non-limitative exemplary embodiments. The same or similar parts, components and elements are designated in the figures with the same reference numerals. In the drawing:

- fig. 1 shows a perspective view of an embodiment of the greenhouse according to the invention;

- fig. 2 shows a perspective view of the greenhouse of figure 1 at an early stage of the construction thereof;

- fig. 3 shows a perspective view of a part of the foundation element of figure 2 with exploded parts;

- fig. 4 shows a perspective detail view of a column and an associated foundation element of the greenhouse of figure 1;

- fig. 5 shows a perspective view with exploded parts of an embodiment of the connection between the column and an associated foundation element of figure 4;

- fig. 6 shows a perspective view of the connection between the column and an associated foundation element of figure

5 in the assembled situation; - fig. 7 shows a perspective view of an alternative embodiment of the connection between the column and an associated foundation element of figure 5 in assembled situation,-

- fig. 8 shows a perspective view of an alternative embodiment of the connection between the column and an associated foundation element of figure 5 in assembled situation; and

- fig. 9A-9D show a side view in longitudinal section of the embodiment of the connection of the column and the associated foundation element of figure 8 in the assembled situation for different column sizes.

Figure 1 shows a greenhouse 1. Greenhouse 1 has a foundation with a number of foundation elements 2 and columns

3. Two columns 3 at a time are connected to a lattice truss 4.

A glass roof 5 supports on columns 3 and lattice trusses 4. Glass roof 5 consists of a framework consisting of ridges 6, gutters

7 and bars 8, in which framework are received light-transmitting panels 9 of for instance glass.

Each column 3 is associated in each case with one of the foundation elements 2. Foundation elements 2 are inserted into a ground surface 10 as according to arrow A. Foundation elements 2 are anchored in ground 10 in a concrete prop 11, also referred to as a pedestal foot .

Figure 2 shows greenhouse 1 of figure 1 at an early stage of the construction thereof, wherein only foundation elements 2 have been arranged in ground 10. Further shown is that a vehicle 12 collides with foundation element 2a during the construction of greenhouse 1 (see figure 1) , whereby forces other than the forces resulting from the weight and the load of glass roof 6 act on foundation element 2, whereby this element can be damaged and must then be replaced.

Figure 3 shows a part of foundation element 2 of the foundation of greenhouse 1 in detail with exploded parts.

Foundation element 2 comprises an elongate hollow profile 13 constructed from a fibre-reinforced plastic, the fibres 14 of which extend substantially in the longitudinal direction A of profile 13. Not shown is that the length of the individual fibres is equal to the length of elongate profile 13. This profile 13 is for instance realized by means of pulltrusion. Additionally or alternatively, the fibre-reinforced plastic comprises fibres extending substantially in the peripheral direction of elongate profile 13. The individual fibres extending in the peripheral direction can then be wound helically a number of times round the periphery. It is also possible for the profile not to be hollow and to be for instance of I- or H-shaped cross-section. Arranged on outer surface 15 of profile 13 in the longitudinal direction A thereof is a fibre mat 16 with fibres 17 oriented at an angle relative to the longitudinal direction A of profile 13. As a result of the fibres 14 extending in the longitudinal direction A of profile 13 the profile 13 is for instance better able to withstand forces in the direction B perpendicularly of the longitudinal direction A of profile 13 than for instance a known concrete pile. Fibre mat 16 improves the resistance of profile 13 to for instance damaging of outer surface 15 thereof. The same fibre mat can also be arranged on the inner surface of hollow profile 13.

Figure 4 shows in detail a column 3 and an associated foundation element 2 of greenhouse 1 of figure 1. Column 3 is connected to foundation element 2 by means of a connecting element 18. Foundation element 2 comprises the elongate profile 13 as shown in figure 2. Foundation element 2 is anchored in a concrete prop 11.

Figure 5 shows with exploded parts the connection of figure 4 of column 3 to foundation element 2 by means of connecting element 18. Foundation element 2 comprises profile 13. The upper side in assembled situation of profile wall 20 of profile 13 forms a bearing surface 21. Connecting element 18 comprises a plate-like element 22 from which positioning legs 23a, 23b, 23c, 23d, 23e, 23f, 23g, 23h extend in the longitudinal direction A of column 3 and foundation element 2. Lower surface 24 of plate-like element 22 can be brought into contact with bearing surface 21 of profile 13 in the direction of arrow B. In the shown embodiment the plate-like element 22 is here in contact with the whole bearing surface 21 of profile wall 20. Profile 13 is a thin-walled profile. The bearing surface is small particularly in the case of thin-walled profiles, whereby the pressure on the bearing surface resulting from forces to be transmitted is high relative to non-thin-walled profiles, and a good distribution of the forces to be transmitted contributes toward preventing damage to the profile, such as for instance fibres breaking out^". If the strength of the walls permits, a smaller part of the upper surface in the assembled situation of the profile can also form the bearing surface.

Connecting element 18 also comprises a coupling element 25 which can be placed through opening 26 in the direction of arrow B so that in the assembled situation coupling element 25 forms coupling legs 25a, 25b, which extend on either side of plate-like element 22. Protrusions 27 prevent the coupling element falling through opening 26 into the interior of profile 13. In the assembled situation the axis 28 of coupling hole 29 in coupling element 25 corresponds to axis 30 of coupling hole 31 in profile 13, so that coupling element 25 can be coupled to profile 13 of foundation element 2 by means of coupling means in the form of nut-bolt combination 32.

Column 3 can slide over coupling element 25 in the direction of arrow B until column 3 is in contact with upper surface 33 of plate-like element 22. An axis 33 of coupling hole 34 in coupling element 25 then corresponds to axis 35 of coupling hole 36 in column 3, so that coupling element 25 can be coupled to profile 13 of foundation element 2 by means of coupling means in the form of nut-bolt combination 37.

Profile 13 is hollow. Hollow profile 13 can be poured full of concrete in order to increase the rigidity thereof, for instance when the associated foundation element 2 serves to support a cross brace column. Two foundation elements 2 which are associated with cross brace columns can be mutually connected by means of a coupling beam. Such a coupling beam can be coupled to each of the foundation elements using a nut-bolt connection. In order to prevent holes having to be drilled in the concrete which has been poured into hollow profile 13, bushes can for instance be arranged in the hollow profile prior to the pouring.

In figure 6 the connection of column 3 and foundation element 2 by means of connecting element 18 as shown in figure 5 is shown in the assembled situation. For the shown size of column 3, the side surfaces 38 of coupling element 25 form the positioning surface against which the inner surface of column 3 can be placed for positioning thereof relative to connecting element 18. The positioning surfaces for positioning foundation element 2 relative to connecting element 18 is formed by the side surfaces of positioning legs 23e, 23f, 23g and 23h, of which positioning legs 23f and 23g extend along the inner side of profile wall 20 and positioning legs 23e and 23h extend along the outer side of profile wall 20. In figure 7 the connection of column 3 and foundation element 2 by means of an alternative embodiment of connecting element 18 of figure 3 is shown in the assembled situation. In this embodiment coupling legs 38, 39 and 40 are formed integrally with plate-like element 22. Coupling legs 38, 39 and 40 are also the positioning legs. For the shown size of column 3 the side surface 41 of coupling leg 38 forms the positioning surface against which the outer surface of column 3 can be placed for positioning thereof relative to connecting element 18. The positioning surfaces for positioning foundation element 2 relative to connecting element 13 are formed by side surfaces 42 and 43 of coupling legs 39 and 40, wherein coupling legs 39 and 40 extend along the outer side of profile wall 20. In figure 8 the connection of column 3 and foundation element 2 by means of an alternative embodiment of connecting element 18 of figure 3 is shown in the assembled situation. In this embodiment coupling legs 44, 45, 46, 47, 48 and 49 are formed integrally with plate-like element 22. For the shown size of column 3 the side surfaces 50 and 51 of coupling legs 44 and 45 form the positioning surface against which the inner surface of column 3 can be placed for positioning thereof relative to connecting element 18. The positioning surfaces for positioning foundation element 2 relative to connecting element 18 are formed by end surfaces 52, 53 of the L-shaped coupling legs 46, 47, these coupling legs extending along the inner side of profile wall 20, and by side surfaces 54 and 55 of coupling legs 48 and 49, these coupling legs extending along the outer side of profile wall 20. At the shown size of column 3 the positioning legs 57, 58 and 59 are not used.

Figures 9A-9D show for different column sizes the connection, in the assembled situation, of column 3 and foundation element 2 by means of connecting element 13 of figure 8. Figure 9A shows a first column 3 of the smallest size.

This is the size of column 3 as shown in figure 8, wherein the side surfaces of coupling legs 44 and 45 form the positioning surface against which the inner surface of column 3 can be placed for positioning thereof relative to connecting element 18. Figure 9B shows a size of column 3 wherein the side surfaces of coupling legs 57 and 58 form the positioning surface against which the outer surface of column 3 can be placed for positioning thereof relative to connecting element 18. Figure 9C shows a size of column 3 wherein the side surfaces of coupling legs 56 and 58 form the positioning surface against which the outer surface of column 3 can be placed for positioning thereof relative to connecting element 18. Figure 9D shows a size of column 3 wherein the side surfaces of coupling legs 57 and 58 form the positioning surface against which the inner surface of column 3 can be placed for positioning thereof relative to connecting element 18.

Connecting element 18 according to figure 5 is also suitable for columns of different sizes.

It is noted that an elongate profile as applied in the present invention can also be referred to as a profile beam.

It is noted that a combination of measures .from different described exemplary embodiments is also provided.

Claims

1. Greenhouse for glass horticulture, comprising:

- a foundation which comprises a number of foundation elements; and

- columns which in assembled situation support at least one glass roof, wherein each column is associated in each case with one of the foundation elements, characterized in that - the foundation elements comprise an elongate profile, wherein the profile is constructed substantially from a fibre-reinforced plastic.

2. Greenhouse as claimed in claim 1, characterized in that the fibre-reinforced plastic comprises fibres extending substantially in the longitudinal direction of the profile.

3. Greenhouse as claimed in claim 2, characterized in that the length of the individual fibres extending in the longitudinal direction is substantially the length of the elongate profile.

4. Greenhouse as claimed in any of the foregoing claims, characterized in that the fibre-reinforced plastic comprises fibres which extend substantially in the peripheral direction of the elongate profile.

5. Greenhouse as claimed in claim 4, characterized in that the individual fibres extending in the peripheral direction are wound helically a number of times round the periphery.

6. Greenhouse as claimed in any of the foregoing claims, characterized in that the profile is hollow.

7. Greenhouse as claimed in any of the foregoing claims, characterized in that

- the profile is a profile realized by means of pulltrusion.

8. Greenhouse as claimed in any of the foregoing claims, characterized in that

- a fibre mat is arranged on the surface of the profile along the longitudinal direction thereof, with fibres oriented at a random angle relative to the longitudinal direction of the profile.

9. Greenhouse as claimed in any of the foregoing claims, characterized in that

- at least a part of the upper side in assembled situation of the profile forms a bearing surface; and

- each column is connected to the associated foundation element by means of a connecting element, wherein the connecting element is in contact with substantially the whole bearing surface .

10. Greenhouse as claimed in claim 9, characterized in that

- substantially the whole upper surface in assembled situation of the profile forms the bearing surface.

11. Greenhouse as claimed in either of the claims 9 and 10, characterized in that

- the connecting element comprises, at least in the assembled situation, a positioning leg which in the assembled situation extends in the longitudinal direction of one of the column and the foundation element, and forms a positioning surface against which at least one of the column and the foundation element can be placed for the purpose of positioning thereof .

12. Greenhouse as claimed in claim 11, characterized in that - the connecting element comprises at least one positioning leg for each of the column and the foundation element .

13. Greenhouse as claimed in either of the claims 11 and 12, characterized in that

- the connecting element comprises more than one positioning leg for positioning more than one size of at least one of the column and the foundation element .

14. Greenhouse as claimed in any of the claims 11-13, characterized in that

- the connecting element comprises, at least in the assembled situation, a coupling leg which extends in the longitudinal direction of one of the column and the foundation element in the assembled situation, and coupling means for coupling the coupling leg to at least one of the column and the foundation element.

15. Greenhouse as claimed in claim 14, characterized in that

- the connecting element comprises at least one coupling leg for each of the column and the foundation element.

16. Greenhouse as claimed in at least claims 11 and 14, characterized in that the positioning leg forms the coupling leg.

17. Greenhouse as claimed in any of the claims 9-16, characterized in that

- the connecting element comprises a plate-like element, wherein in assembled situation a part of the surface of the plate-like element is in contact with the bearing surface.

18. Greenhouse as claimed in at least claims 14 and 17, characterized in that

- the coupling legs are formed by means of a coupling element which extends in use through an opening in the plate-like element on both sides of the plate-like element.

19. Foundation element for forming a greenhouse as claimed in any of the foregoing claims, comprising

- an elongate profile; wherein - the profile is constructed substantially from a fibre-reinforced plastic.

20. Connecting element for forming a greenhouse as claimed in any of the claims 9-18.

21. Greenhouse for glass horticulture, comprising

- a foundation which comprises a number of foundation elements; and

- columns which support at least one glass roof in the assembled situation, wherein each column is associated in each case with one of the foundation elements, characterized in that

- the foundation elements comprise an elongate profile, wherein the profile is constructed substantially from a plastic; - at least a part of the upper surface in assembled situation of the profile forms a bearing surface; and

- each column is connected to the associated foundation element by means of a connecting element, wherein the connecting element is in contact with substantially the whole bearing surface.

22. Greenhouse as claimed in claim 21, characterized in that

- substantially the whole upper surface in the assembled situation of the profile forms the bearing surface.