FIELD

[1] This disclosure relates to connection systems and more particularly, structural connection systems for use in storage tanks. CROSS-REFERENCE TO RELATED APPLICATION

[2] This application claims the benefit of Australian Provisional Application

No. 2016901376, filed on 13 April 2016, the entire contents of which is hereby incorporated by reference herein.

SUMMARY [3] The following is a broad summary of various exemplary embodiments of a connection system and an assembly. As such, it is provided solely for the purpose of enhancing the clarity of the specification. It is not intended to limit the scope of the appended claims.

[4] It will be appreciated that reference herein to "preferred" or "preferably" is intended as exemplary only.

[5] According to one broad aspect, but not necessarily the broadest aspect, there is disclosed a connection system to connect adjacent wall panels in a storage tank assembly connecting panels, each of the wall panels having opposing ends, comprising a connector configured to connect opposing wall panel ends, the connector having a cross bar and an arm connected to each terminating portion of the cross bar such that the arms are parallel; and at least one wall panel end member arranged on each respective wall panel end, the, or each, wall panel end member having a channel formed therein, the channel being adapted to receive an edge of a wall panel end, the, or each, wall panel end member including a passage in which the parallel arms and the cross bar of the connector are slidably received.

[6] Suitably, the edge is a bent edge of a wall panel end. [7] Suitably, the channel is an L-shaped channel. [8] Preferably, the wall panels are curved.

[9] Suitably, the connector is configured to be internally lockable upon engagement with the passage.

[10] Preferably, the connector further includes a protrusion, and preferably an angled protrusion, at the end of each arm. Suitably, the protrusion is inwardly directed and abuts the passage upon engagement.

[1 1 ] Suitably, the connector is an elongate member and more preferably the connector is a bar.

[12] Preferably, the connector has a generally H-shaped cross-section. [13] Any sheet material may be suitable for the present disclosure. Suitably, the panels are manufactured from a material that can sustain a bend. In preferred embodiments, the material is a metal. In other preferred embodiments, the material is a plastics material.

[14] In preferred embodiments, the wall panel end member is unitary however the present disclosure contemplates other embodiments in which the wall panel end member is integral with a panel.

[15] Suitably, the wall panel end member includes a transverse passage in which the parallel arms of the connector are slidably received.

[16] According to another aspect, but not necessarily the broadest aspect, there is disclosed a storage tank assembly comprising a plurality of adjacent wall panels connected by the connection system of the first mentioned aspect.

[17] According to another aspect, but not necessarily the broadest aspect, there is disclosed a system to join one or more lid panels of a modular roof structure, the system comprising a coupling member adapted to be slidably insertable into a strut when the lid panel is located therein; and a locking device configured to lock the lid panel to the strut when the locking device is engaged with an end portion of the coupling member.

[18] According to another aspect, but not necessarily the broadest aspect, there is disclosed a storage tank assembly comprising, a shell including a plurality of wall panels configured to connect together to form the shell; one or more of struts extending between the wall panels and a vertical post positioned in substantially the centre of the shell; a roof structure including a plurality of lid panels configured to engage with a strut, wherein the lid panels include an edge having a locator to locate the edge of the lid panel to the top edge of the wall panel; one or more coupling members adapted to be slidably insertable into the strut when the lid panel is located therein; and one or more locking devices configured to lock the lid panel to the strut when the, or each, locking device is engaged with an end portion of the coupling member.

[19] According to this aspect, the wall panels of the storage tank assembly may be joined by the connection system of the first aspect or alternatively, may be joined by any suitable connection system.

[20] Preferably, the locking device according to any one of the aforementioned aspects, is insertable into the end portion of the coupling member and bears against the coupling member to thereby lock the lid panel to the strut. More preferably, the locking device is insertable into a channel of the end portion of the coupling member.

[21 ] Preferably, the strut according to any one of the aforementioned aspects, includes a central groove for receiving the lid panel and the coupling member. [22] Suitably, the strut is a support strut.

[23] Preferably, the coupling member according to any one of the aforementioned aspects, is an elongate member. Suitably the coupling member is a bar.

[24] Preferably, the coupling member is substantially H-shaped in cross section.

[25] Suitably, the locator according to any aforementioned aspect, is a seal extending around the outer edge of the lid panel and includes a groove or cleft that engages with the top or upper edge of the wall panel.

[26] Preferably, the shell according to any aforementioned aspect is a cylinder. In other preferred embodiments, the shell is a square. In alternative preferred embodiments, the shell is oval shaped. [27] According to another aspect, but not necessarily the broadest aspect, there is disclosed a flat pack kit comprising at least one wall panel configured for connection to an adjacent wall panel by a connection system according to the aforementioned aspect, and a connection system according to the aforementioned aspect. [28] Suitably, the kit includes a plurality of wall panels.

[29] Specific exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings. The following description is for illustrative purposes only and is not intended to limit the scope of the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS [30] In order that the present disclosure may be readily understood and put into practical effect, reference will now be made to embodiments of the present disclosure with reference to the accompanying drawings, wherein like reference numbers refer to identical elements. The drawings are provided by way of example only, wherein:

[31 ] FIG. 1 is a side view in section of a storage tank assembly in accordance with an embodiment of the present disclosure.

[32] FIG. 2 is a perspective view of the storage tank assembly shown in FIG. 1.

[33] FIG. 3 is a perspective view of two wall panels for joining by a connection system in accordance with an embodiment of the present disclosure.

[34] FIG. 4 is an exploded top view of the unassembled connection system shown in the boxed section of FIG. 3.

[35] FIG. 5 is a perspective top view of adjacent connected wall panels in cross-section of a body or a shell in the form of a cylinder of the storage tank assembly when positioned on a base.

[36] FIG. 6A is an exploded top view of two wall panels joined by the connection system shown in FIG. 4 and FIG. 5.

[37] FIG. 6B is a cross-section view of the assembled connection system of the present disclosure.

[38] FIG. 7 is a perspective view of the connection system in an unassembled form with adjacent wall panels having opposing panel end members for connection by a connector of the connection system. [39] FIG. 8 is an exploded three-dimensional top view of the unassembled connection system shown in FIG. 7.

[40] FIG. 9 is a perspective view of a partially constructed shell in the form of a cylinder of a storage tank assembly according to an embodiment of the present disclosure, showing a liner positioned in an interior surface of the cylinder.

[41 ] FIG. 10A is an exploded view of a retaining member holding the linershown in FIG. 9 to the interior surface of the cylinder.

[42] FIG. 10B is an exploded view of the retaining member shown in FIG. 10A without a hook. [43] FIG. 1 1 is a perspective view of a partially constructed storage tank assembly showing positioning of a central post and a cap for assembly of a modular roof structure.

[44] FIG. 12 is a perspective view of the cap shown in FIG. 1 1.

[45] FIG. 13 is a perspective view of a notched strip located in the cap shown in FIG. 12.

[46] FIG. 14 is a perspective top view of a partially constructed storage tank assembly showing the formation of a modular roof structure through stepwise connection of a plurality of lid panels.

[47] FIG. 15 is an exploded three-dimensional view of an outer edge of a lid panel shown in FIG. 14.

[48] FIG. 16 shows the lid panel of FIG. 15.

[49] FIG. 17 is a perspective view of the relationship between a strut shown in

FIG. 14 and the retaining member shown in FIG. 10.

[50] FIG. 18 is a perspective view of the relationship between a coupling element shown in FIG. 14 and a locking body according to an embodiment of the present disclosure.

[51 ] FIG. 19 is an exploded view of the modular roof construction of FIG. 14 showing alignment the coupling element of FIG. 18 with the strut of FIG. 17.

[52] FIG. 20 is an exploded view of two adjacent lid panels in an assembled and locked form. [53] FIG. 21 is a perspective view of a storage tank assembly of the present disclosure with additional, optional features.

[54] FIG. 22 is a side view in section of a storage tank assembly in accordance with a further embodiment of the present disclosure. [55] FIG. 23 is a perspective view of the storage tank assembly shown in

FIG. 22.

[56] FIG. 24 is a perspective view of two wall panels of the storage tank assembly shown in FIG. 22 for joining by a connection system in accordance with a further embodiment of the present disclosure. [57] FIG. 25 is an exploded top view of the unassembled connection system shown in FIG. 24.

[58] FIG. 26 is an exploded view of a support of the storage tank assembly shown in FIG. 22 in accordance with an embodiment of the present disclosure.

[59] FIG. 27 is a top view of two wall panels connected or joined by the connection system shown in FIG. 25.

[60] FIG. 28 is a perspective top view of adjacent connected wall panels in cross section of a cylinder of the storage tank assembly shown in FIG. 22 when positioned on a base.

[61 ] FIG. 29 is a perspective view of the connection system shown in FIG. 25 in an unassembled form with adjacent wall panels having opposing wall panel end members for connection by a connector of the connection system.

[62] FIG. 30 is an exploded top view of two wall panels joined by the connection system shown in FIG. 28 and FIG. 29.

[63] FIG. 31 is an exploded three-dimensional top view of the unassembled connection system shown in FIG. 30.

[64] FIG. 32 is a perspective view of a partially constructed shell in the form of a cylinder of a storage tank assembly according to a further embodiment of the present disclosure, showing a liner positioned in an interior surface of the cylinder.

[65] FIG. 33 is an exploded view of a retaining member holding the liner shown in FIG. 32 to the interior surface of the cylinder. [66] FIG. 34 is a perspective view of the retaining member shown in FIG. 33 without a hook.

[67] FIG. 35 is an end perspective view of the retaining member shown in

FIG. 33 and FIG. 34. [68] FIG. 36 is a perspective view of the partially constructed storage tank assembly shown in FIG. 32 showing positioning of a central post and a cap for assembly of a modular roof structure.

[69] FIG. 37 is a perspective view of the cap shown in FIG. 36.

[70] FIG. 38 is a perspective view of a notched strip located in the cap shown in FIG. 37.

[71 ] FIG. 39 is a perspective top view of the partially constructed tank assembly shown in FIG. 32 showing the formation of a modular roof structure through stepwise connection of multiple lid panels.

[72] FIG. 40 is an exploded three-dimensional view of an outer edge of a lid panel shown in FIG. 39.

[73] FIG. 41 shows the lid panel of FIGs. 39 and 40.

[74] FIG. 42 is a perspective view of the relationship between a strut shown in

FIG. 39 and the retaining member shown in FIG. 34.

[75] FIG. 43 is a perspective view of the relationship between a coupling element shown in FIG. 39 and a locking body according to a further embodiment of the present disclosure.

[76] FIG. 44 is a perspective end view of the locking body shown in FIG. 43.

[77] FIG. 45 is an exploded view of the modular roof construction of FIG. 39 showing alignment the coupling element of FIG. 43 with the strut of FIG. 42. [78] FIG. 46 is an exploded view of two adjacent lid panels in an assembled and locked form according to a further embodiment of the present disclosure.

[79] FIG. 47 is a perspective view of the storage tank assembly of FIG. 22 including additional, optional features.

[80] FIG. 48 is a sectional view of a connector of the present disclosure according to an alternative embodiment. [81 ] FIG. 49 is a sectional view of a connector of the present disclosure according to a further alternative embodiment.

[82] FIG. 50 is a sectional view of a connector of the present disclosure according to another alternative embodiment. [83] Skilled addressees will appreciate that elements in the drawings are illustrated for simplicity and clarity and have not necessarily been drawn to scale. By way of example, the relative dimensions of some of the elements in the drawings may be distorted to help improve understanding of embodiments of the present disclosure.

DETAILED DESCRIPTION [84] In FIGs. 1 and 2, there is shown a storage tank assembly 100 comprising a base 10, a body or a shell in the form of a cylinder 20 and a modular roof structure 40 according to one embodiment of the present disclosure. The depicted embodiment is directed to a storage tank assembly 100 for the storage of liquids and is particularly suited to the storage of water. It will be appreciated that the storage tank assembly 100 of the present disclosure can be suitable for the storage of a range of liquids including water, food, and for chemical storage.

[85] As shown in FIGs. 3 to 8, the cylinder 20 comprises a plurality of wall panels 21 that are curved, and connected by a connection system 30 of the present disclosure. It is contemplated that in alternative embodiments, the plurality of wall panels 21 may be connected to form a body or a shell that is a square or an oval shape. According to preferred embodiments, the wall panel 21 may preferably be formed from metal and in particular from steel sheeting, although it will be appreciated that any material that can sustain a bend or a curve may be utilised for manufacture of the wall panel 21. A non-limiting example of a suitable metal material may be aluminium. It will be appreciated that a plastics material of suitable structural integrity may also be employed. The plastics material may be a polyethylene such as, but not limited to high- density polyethylene. Alternatively, the plastics material may be a polypropylene. Other non-limiting examples of a plastics include polyvinyl chloride (PVC) and polyvinylidene fluoride (PVDF). The material from which the wall panel 21 is formed may be food contact approved. Alternatively, the material may be a fibreglass. Each wall panel 21 comprises one or more bars or ribs 24 to strengthen the wall panel 21 against warping, for example. The bars or ribs 24 can protrude outwardly from the wall panel 21 and can be moulded integrally with the wall panel 21 . [86] Referring to FIG. 4, the connection system 30 comprises a wall panel end member 31 configured to (i) receive a connector 35; and (ii) receive an end of the wall panel 21. The wall panel end member 31 includes a passage 32 that may be a transverse passage for slidably receiving the connector 35, which will be discussed in more detail below. A channel in the form of a generally L-shaped channel 34 is formed through body 33 of the wall panel end member 31 , and can receive a bent edge 22 of the end of the wall panel 21. In the embodiment shown in FIGs. 3 to 8, the wall panel end member 31 is an extrusion separately connectable to the wall panel 21 . However, it is contemplated that in alternative embodiments, the wall panel end member 31 may be integral with the wall panel 21. Such suitable embodiments include a wall panel 21 formed from a plastics material by injection moulding.

[87] The connector 35 is generally H-shaped in cross-section and includes a cross bar 36 with each end of the cross bar 36 integral with a pair of arm members 37 extending in opposing directions perpendicular to the cross bar 36. Each arm member 37 terminates in a foot 38 inwardly facing the cross bar 36. The foot 38 has a face in the form of an arcuate face 39 that is inwardly directed towards the cross bar 36.

[88] The passage 32 is shaped to accommodate the arm member 37 and the cross bar 36 of the connector 35. With particular reference to FIGs. 4, 6A, 6B and 8, a complementary H-shape is formed from alignment of each transverse passage 32 when opposing panel end members 31 are adjoined prior to connection. The connector 35 can then be slidably received by the cognate H-shape formed by joining each passage 32. The passage 32 is configured to slidably receive the arms members 37 and the cross bar 36 of the connector 35. FIG. 6A shows the locked position in which the edge of adjacent wall panels 21 are connected. As also shown in FIG. 6B, in this arrangement the connector 35 is fully engaged in the wall panel end member 31 on each wall panel 21. A non-limiting feature of this system is that when fully engaged, the connector 35 locks internally due, at least in part, to the arcuate face 39 of each foot 38 bearing upon the internal surface of the cognate groove of the transverse passage 32. The stability of the resulting connection along a length of the connector 35 and the edge of a length of each wall panel end member 31 is a non-limiting advantage conferred by the connection system 30.

[89] FIGs. 9 to 21 relate to a storage tank assembly 100 including the modular roof structure 40 according to an exemplary embodiment of the present disclosure. FIG. 9 illustrates a liner 23 positioned on the interior surface of the cylinder 20 with a plurality of wall panels 21 connected by a connection system. It will be appreciated that in accordance with the embodiments shown in FIGs. 9 to 21 , the connection system for joining of the wall panels 21 may be the connection system 30 described herein or may be alternative suitable connection systems as would be known by a person of skill in the art. In alternative embodiments, the wall panels 21 may be connected to form a body or a shell that is a square or oval shape. The liner 23 may vary in size depending on the length, width and height of the cylinder 20. The liner 23 may be made from a flexible material such as polyethylene or PVC, which can hold a liquid. However, it is contemplated that the present disclosure may be used without a liner and that it may be capable of holding a liquid or other material for storage.

[90] As shown in FIG. 10A, the liner 23 is secured to the interior of the cylinder 20 by a retaining member 50 located on a top edge at a connection junction of two adjacent connected wall panels 21. Referring also to FIG. 10B, the retaining member 50 includes a seat 52 that terminates with opposing upright members 51 to create a U-shape. Extending from and below the seat 52 on the exterior of the cylinder 20 is a protrusion 53 that terminates in an outwardly directed lip 54. The lip 54 allows the protrusion 53 to clip the retaining member 50 into position over the top edge of connected adjacent wall panels. Extending from the opposite side (the interior directed side) of the seat 52 is a plate 55 locatable on the interior of the cylinder 20 when the retaining member 50 is engaged in position. Projecting vertically from about the centre of the plate 55 is a support member 56 that includes an aperture 57 from which a hook 58 is suspended. The hook 58 is generally S-shaped to retain the liner 23 to the interior of the cylinder in one or a plurality of locations (not shown). A slot 55a is defined, at least in part, by protrusion 53 and the plate 55. The slot 55a is sized and configured to overlay onto a top edge of the connection system 30, or a top edge of the wall panel 21 . Located above the support member 56 is an engagement member 59, which is configured to receive a strut 47 extending between the retaining member 50 and a central post 43 in the modular roof structure 40, which will be discussed in more detail below. The retaining member may be formed from the same or a different material to the cylinder 20.

[91 ] FIG. 1 1 illustrates the position in the cylinder 20 of the central post 43 and a cap 44 of the modular roof structure 40. The central post 43 is elongate and may vary in size depending on the height of the cylinder 20. The central post 43 can be manufactured from any material that is suitable to bear the weight of the modular roof structure 40, as will be known by a person of skill in the art. In the depicted embodiment, the central post 43 has a circular cross-section, although it is contemplated that the central post 43 can have alternative shapes such as square, although without limitation thereto. FIG. 1 1 also shows a base plate 43a located at an end of the central post 43 for stabilising the central post 43 on the base 10 of the storage tank assembly 100. It will be appreciated by a person of skill in the art that a storage tank floor (not depicted) may also be present on the base 210 of the assembled tank. The cap 44 is configured to engage an end of the central post 43 and may be manufactured from the same material as the central post 43 or an alternative suitable material. Non-limiting examples of suitable materials include PVC, polyethylene, and stainless steel. It is contemplated that the cap 44 can be formed from a UV resistant material. The top of the cap 44 can be flat as shown in FIG. 12 or alternatively pitched as shown in FIG. 19. [92] As shown in FIGs. 12 to 14, the cap 44 is adapted to receive the strut 47 of the modular roof structure 40. Referring to FIG. 12, a notched strip 46 is fitted into a recess channel 45 of the cap 44. Accordingly, the notched strip 46 is sufficiently flexible so as to form a circular shape when fit into the recess channel 45. The notched strip 46 comprises a plurality of notches 46a that are evenly spaced along the notched strip 46. It will be appreciated that the number of the notches 46a in the notched strip 46 and the spacing between the notches is related to the number of the struts 47 in the roof structure 40. The notch 46a is shaped to securely receive the strut 47 as illustrated in FIGs. 14 and 19.

[93] As will be discussed in more detail hereinbelow, the modular roof structure 40 is constructed by the positioning and locking of one or more lid panels 41 to one or more struts 47. Each lid panel 41 can be a circular sector or a wedge and may include a cutout portion 41 a at the apex of the circular sector or the wedge. The cutout portion 41 a may be configured to abut the lid panel 41 to the central post 43.

[94] As illustrated in FIGs. 14 to 16, and FIG. 19, the lid panel 41 includes an edge having a locator 42 to locate the edge of the lid panel 41 on an upper edge of the wall panel 21 . The locator 42 can be a flexible seal joined to an arcuate periphery of the lid panel 41 as shown in particular in FIGs. 15 and 16. In the depicted embodiment, the locator 42 is located on the upper edge of the wall panel 21 by way of a cleft 42a. The lid panel 41 includes a side flange 41 b extending downwardly from a radial edge extending between the cutout portion 41 a and the locator 42. The side flange 41 b of each lid panel 41 engages with a central channel 47a of the strut 47 prior to locking of the modular roof structure 40. The lid panel 41 may be made of any material suitable for use in a roof structure such as, but not limited to, a plastics material, a fibreglass, a composite material, or a metal. [95] Referring to FIG. 17, the strut 47 is configured to engage the engagement member 59 of the retaining member 50. The central channel 47a located on a side of the strut 47, which is in contact with the lid panel 41 , is formed from opposing L-shaped bands 47b. The central channel 47a is of any size or dimension that will accommodate each of side flange 41 b from adjacent lid panels 41 . In the illustrated embodiments, the strut 47 is a unitary elongate member formed by an extrusion process. The strut

47 can be formed from a metal or alternatively a plastics material, and more particularly a plastics material, that is able to bear the weight of the assembled lid panels 41. The strut 47 may be configured to be load bearing. The strut 47 may be a support strut. [96] The engagement member 59 incudes a central projection 59a flanked on each lateral end by a securing projection 59b. A slot 59c is present between the central projection 59a and each securing projection 59b. The strut 47 is substantially hollow such that upon engagement of the strut 47 with the retaining member 50, the strut 47 is located on the top surface of the support member 56 and the central projection 59a is slidably secured into an internal aperture 47c of the strut 47 and secured in place by the securing projections 59b flanking the exterior of the strut 47.

[97] Referring to FIGs. 18, 19 and 20, the lid panel 41 is locked to the strut 47 by a coupling member in the form of a coupling element 48 and a locking device in the form of a locking body 49. Therefore, in certain preferred embodiments, the present disclosure provides a system to join one or more lid panels 41 of a modular roof structure 40, the system including a coupling member, preferably coupling element 48, adapted to be slidably insertable into the strut 47 when the lid panel 41 is located therein; and a locking device, preferably locking body 49, configured to lock the lid panel 41 to the strut 47 when the locking body 49 is engaged with an end portion of the coupling element 48.

[98] The coupling element 48 is an elongate member having a cross bracket in the form of a cross bar 48a that is slidably insertable into the central groove 47a of the strut 47 when adjacent lid panels 41 are located in the central groove 47a. Integral with each lateral end of the cross bar 48a is a pair of arms 48b and 48c extending in opposing directions to the cross bar 48a. The arm 48c is slidably insertable into the internal aperture 47c of the strut 47. Prior to locking, the coupling element 48 is slid into the central groove 47a having adjacent lid panels 41 located therein. The arm 48b abuts the top surface of the strut 47 and the lid panel 41 when the coupling element

48 is fully slidably engaged with the strut 47. The coupling element 48 can generally be the same length as the strut 47. The coupling element 48 shown in the drawings is formed by extrusion, however it is contemplated that the coupling element 48 may be formed by injection moulding. The coupling element 48 may be manufactured from any suitable material inclusive of a metal (such as, but not limited to, stainless steel) and a plastics material of suitable durability.

[99] The locking body 49 includes a backing plate 49a from which protrudes two blocks 49b. As illustrated in FIG. 18, the blocks 49b are configured to fit on either side of the cross bar 48a of the coupling element 48. FIG. 20 illustrates adjacent lid panels 41 coupled to the strut 47 by the coupling element 48 and locked in position by inserting the blocks 49b into the respective recesses of the coupling element 48 and pressing the locking body 49 into the retaining member 50 to thereby lock the assembly. When in the locked position, the locking body 49 is located on the seat 52 of the retaining member 50. The process of locking adjacent lid panels 41 to a strut 47 using the coupling element 48 and the locking body 49 is repeated to the form the modular roof structure 40 of the storage tank assembly 100.

[100] A person of skill in the art will appreciate that the storage tank assembly 100 may include other features that have utility in a particular application as illustrated, for example, in FIG. 21. This embodiment is particularly suitable as a water collection and storage tank, and included therein is a water inlet strainer 70 located on the modular roof structure 40. Overflow from the storage tank assembly 100 is controlled by an overflow pipe 80 located generally at the top of the cylinder 20. A tap hole 90 may be positioned at a lower level of the cylinder 20 to enable a liquid to flow out of the storage tank assembly 100.

[101] Referring now to FIGs. 22 to 47, a storage tank assembly 200 is shown in accordance with another preferred embodiment of the present invention. Storage tank assembly 200 is similar to storage tank assembly 100, with the exceptions described herein. Storage tank assembly 200 comprises a base 210, a body or a shell in the form of a cylinder 220 and a modular roof structure 240. As illustrated in particular in FIGs. 22 to 24, the cylinder 220 comprises a plurality of wall panels 221 that are curved and connected by a connection system 230 according to an exemplary embodiment of the present disclosure. According to certain preferred embodiments, the wall panel 221 is formed from metal and in particular from steel sheeting, although it will be appreciated that any material that can sustain a bend or a curve may be utilised for manufacture of the wall panel 221 . A non-limiting example of a suitable metal material may be aluminium. It will be appreciated that in other preferred embodiments, a plastics material of suitable structural integrity may also be employed. The plastics material may be a polyethylene such as, but not limited to high-density polyethylene. Alternatively, the plastics material may be a polypropylene. Other non-limiting examples of a plastics include polyvinyl chloride (PVC) and polyvinylidene fluoride (PVDF). The material from which the wall panel 221 is formed may be food contact approved. Alternatively, the material may be a fibreglass.

[102] The storage tank assembly 200 includes a support 21 1 removably positioned on the base 210. It will be appreciated that the storage tank assembly 200 may include a plurality of supports 21 1 . The support 21 1 is sized and configured to support or hold the cylinder 220, at a junction with the base 210. More particularly, the support 21 1 is sized and configured to support or hold the connection system 230 in an assembled form. The support 21 1 includes a holder 213 that is sized and configured to hold or accommodate an end of the connection system 230 when assembled, and suitably the end of the connection system 230 that connects or engages the base 210. The holder 213 is connected to a support base 212 at least, in part, by one or more flanges 214. The support base 212 may include one or more apertures 215. The support 221 may be formed from any material having suitable strength and integrity including, but not limited to, a metal, a plastics material, and a fibreglass. The metal may be aluminium, steel, or an alloy. The plastics material may be a polyethylene such as, but not limited to high-density polyethylene. Alternatively, the plastics material may be a polypropylene. Other non-limiting examples of a plastics include polyvinyl chloride (PVC) and polyvinylidene fluoride (PVDF). [103] Referring in particular to FIGs. 25 and 27, the connection system 230 comprises a wall panel end member 231 configured to (i) receive a connector 235; and (ii) receive an end of the wall panel 221. The wall panel end member 231 includes a passage 232 that may be a transverse passage, for slidably receiving the connector 235, which will be discussed in more detail below. A channel in the form of a generally L-shaped channel 234 is formed through body 233 of the wall panel end member 231 , the channel being able to receive a bent edge 222 of the end of the wall panel 221 . In the embodiment shown in the referenced drawings, the wall panel end member 231 is an extrusion separately connectable to the wall panel 221. However, it is contemplated that in alternative embodiments, the wall panel end member 231 may be integral with the wall panel 221. The wall panel end member 231 may joined or integrated with the wall panel 221 by welding, and more particular ultrasonic welding, at one or more locations, regions or positions. By way of example, circled elements designated with an A in FIG. 27 are regions of ultrasonic welding. Ultrasonic welding may be performed in the factory. These regions are stippled for illustrative purpose only. Ultrasonic welding may be utilised to increase stress loading points. Such suitable embodiments include the wall panel 221 formed from a plastics material by injection moulding, although without limitation thereto.

[104] The body 233 of connection system 230 has an alternative profile to the body 33 of the connection system 30. As shown in FIGs. 4 and 6B, the body 33 has a square cross sectional profile. The body 233 shown in particular in FIGs. 25 and 27, has an undulating, or an irregular, cross-sectional profile, and is of a wider width than the body 33. A non-limiting advantage of the wall panel end member 231 having an undulating shape and profile such as the shape and profile depicted in particular in FIGs, 25 and 27, is increased strength in the wall panel end member 231 , due at least in part, to the additional material used to form the wall panel end member. The wall panel end member 231 includes an end surface 233.1 that is angled inwards towards the inner surface of the wall panel end member 231 .

[105] As shown in particular in FIG.s 24 and 29, the connection system 230 includes a plurality of connectors 235. In the depicted embodiment, the storage tank assembly 200 includes four (4) connectors 235 to preferably form a continuous connection or junction. The, or each, connector 235 may be of any suitable length, and in particular may be of a length that corresponds to a length of the wall panel 221. The, or each, connector may be 400 millimetres in length, although limitation thereto.

[106] The connector 235 is a generally elongated H-shape in cross section and includes a cross bar 236, with each end of the cross bar 236 integral with a pair of arm members 237 extending in opposing directions perpendicular to the cross bar 236. Each arm member 237 terminates in a foot 238 inwardly facing towards the cross bar 236. The foot 238 includes a face 239 that is inwardly directed towards the cross bar 236. [107] The passage 232 is shaped to accommodate or receive the arm member 237 and the cross bar 236 of the connector 235. With particular reference to FIGs. 27, 30 and 31 , a complementary generally H-shape is formed from alignment of each passage 232 when opposing wall panel end members 231 are proximated prior to connection. The connector 235 can then be slidably received by the corresponding shape formed by moving each passage 232 into close proximity. Accordingly, each end surface 233.1 of each wall panel end member 231 may either not be in contact with the adjacent end surface 233.1 , or contacts the adjacent surface at a point. FIG. 27 shows the locked position in which the adjacent wall panels 221 are connected. In this arrangement, the connector 235 is fully engaged in the wall panel end member 231 on each wall panel 221. A non-limiting feature of this system is that when fully engaged, the connector 235 locks internally due, at least in part, to the face 239 of each foot 238 bearing upon the internal surface of the cognate groove of the passage 232. Stability of the resulting connection along a length of the connector 235 and the edge of a length of each wall panel end member 231 is a non-limiting advantage conferred by the connection system 230.

[108] FIGs. 32 to 46 relate to the storage tank assembly 200 including a modular roof structure 240 according to an exemplary embodiment of the present disclosure. FIG. 32 illustrates a liner 223 positioned on the interior surface of the cylinder 220 with a plurality of wall panels 221 connected by the connection system 230. It will be appreciated that in accordance with the embodiments shown in FIGs. 32 to 46, the connection system for joining of the wall panels 221 may be a connection system other than the connection system 230, as would be known by a person of skill in the art. In alternative embodiments, the wall panels 221 may be connected to form a body or a shell that is a square or oval shape. The liner 223 may vary in size depending on the length, width and height of the cylinder 220. The liner 223 may be made from a flexible material such as polyethylene or PVC, which can hold a liquid. However, it is contemplated that the present disclosure may be used without a liner and that it may be capable of holding a liquid or other material for storage.

[109] As shown in FIG. 33, the liner 223 is secured to the interior of the cylinder 220 by a retaining member 250 located along a top edge at a connection junction of two adjacent connected wall panels 221. Referring also to FIGs. 34 and 35, the retaining member 250 includes a floor 252 that terminates with opposing upright members 251 to create a U-shape. The floor 252 includes an aperture 257 from which a hook 258 is suspended. The hook 258 is generally S-shaped to retain the liner 223 to the interior of the cylinder in one or plurality of locations, although other shapes for the hook 258 are contemplated. Extending above and over floor 252 is an engaging element in the form of a roof 251 .1 that is directed towards the interior of the cylinder 220 and is slidably engageable with the strut 247. Extending from and below the floor 252 is a protrusion 253 that is sized and configured to be arranged on the exterior of the cylinder 220. The protrusion 253 includes wings 253.1 which may assist with placement and installation of the retaining member 250. A plate 255 is located on the interior of the cylinder 220 when the retaining member 250 is engaged in position. A slot 255a is defined, at least in part, by protrusion 253 and the plate 255. The slot 255a is sized and configured to overlay on a top edge of the connection system 230, or a top edge of the wall panel 221. The retaining member 250 may be formed from the same, or a different, material to the cylinder 220 and/or connection system 230. [1 10] FIG. 36 illustrates the position in the cylinder 220 of the central post 243 and a cap 244 of the modular roof structure 240. The central post 43 is elongate and may vary in size depending on the height of the cylinder 220. The central post 243 can be manufactured from any material that is suitable to bear the weight of the modular roof structure 240, as will be known by a person of skill in the art. In the depicted embodiment, the central post 243 has a circular cross-section, although it is contemplated that the central post 243 may have alternative shapes such as square, although without limitation thereto. FIG. 36 also shows a base plate 243a located at an end of the central post 243 for stabilising the central post 243 on the base 210 of the storage tank assembly 200. It will be appreciated by a person of skill in the art that a storage tank floor (not depicted) may also be present on the base 210 of the assembled tank. The cap 244 is configured to engage an end of the central post 243 and may be manufactured from the same material as the central post 43 or an alternative suitable material. Non-limiting examples of suitable materials include PVC, polyethylene, fibreglass, and stainless steel. It is contemplated that the cap 244 can be formed from a UV resistant material. The top of the cap 244 can be flat as shown in FIG. 37 or alternatively pitched as shown in FIG. 22.

[1 1 1] As shown in FIGs. 37 to 40, the cap 244 is adapted to receive the strut 247 of the modular roof structure 240. Referring to FIG. 37, a notched strip 246 is fitted into a recess channel 245 of the cap 244. Accordingly, the notched strip 246 is sufficiently flexible so as to form a circular shape when fit into the recess channel 245. The notched strip 246 comprises a plurality of notches 246a that are evenly spaced along the notched strip 246. It will be appreciated that the number of the notches 246a in the notched strip 246 and the spacing between the notches is related to the number of the struts 247 in the roof structure 240. The notch 246a is shaped to securely receive the strut 247 as illustrated in FIGs. 39 and 45.

[1 12] As will be discussed in more detail hereinbelow, the modular roof structure 240 is constructed by the positioning and locking of one or more lid panels 241 to one or more struts 247. Each lid panel 241 can be a circular sector or a wedge and may include a cutout portion 241 a at the apex of the circular sector or the wedge, which is configured to abut the lid panel 241 to the central post 243.

[1 13] As illustrated in FIGs. 39 to 41 and FIG. 45, the lid panel 241 includes an edge having a locator 242 to locate the lid panel 241 , and preferably the edge of the lid panel 241 , along an upper edge of the wall panel 221. The locator 242 can be a flexible seal joined to an arcuate periphery of the lid panel 241 as shown in particular in FIGs. 40 and 41. In the depicted embodiment, the locator 242 is located on the upper edge of the wall panel 221 by way of a cleft 242a. The lid panel 241 includes a side flange 241 b extending downwardly from a radial edge extending between the cutout portion 241 a and the locator 242. The side flange 241 b of each lid panel 241 engages with a central channel 247a of the strut 47 prior to locking of the modular roof structure 240. The lid panel 241 may include a projection 241 c between the locator 242 and the side flange 241 b. The lid panel 241 may be made of any material suitable for use in a roof structure such as, but not limited to, a plastics material, a fibreglass, a composite, or a metal.

[1 14] Referring to FIGs. 43 to 46, the lid panel 241 is locked to the strut 247 by a coupling member in the form of a coupling element 248 and a locking device in the form of a locking body 249. Therefore, in certain preferred embodiments, the present disclosure provides a system to join one or more lid panels 241 of a modular roof structure 240, the system including a coupling member, preferably coupling element 48, adapted to be slidably insertable into the strut 247 when the lid panel 241 is located therein; and a locking device, preferably locking body 249, configured to lock the lid panel 241 to the strut 247 when the locking body 249 is engaged with an end portion of the coupling element 248.

[1 15] The coupling element 248 is an elongate member having a cross bracket in the form of a cross bar 248a that is slidably insertable into the central groove 247a of the strut 247 when adjacent lid panels 241 are located in the central groove 247a. Integral with each lateral end of the cross bar 248a is a pair of arms 248b and 248c extending in opposing directions to the cross bar 248a. The arm 248c is slidably insertable into an internal aperture 247c of the strut 247. Prior to locking, the coupling element 248 is slid into the central groove 247a having adjacent lid panels 241 located therein. The arm 248b abuts the top surface of the strut 247 and the lid panel 241 when the coupling element 248 is fully slidably engaged with the strut 247. The coupling element 248 can generally be the same length as the strut 247. The coupling element 248 shown in the drawings is formed by extrusion, however it is contemplated that the coupling element 248 may be formed by injection moulding. The coupling element 248 may be manufactured from any suitable material inclusive of a metal (such as, but not limited to, stainless steel) and a plastics material of suitable durability.

[1 16] The locking body 249 includes a backing plate 249a from which protrudes two insertion members 249b. The backing plate 249a is preferably sized and configured to engage the retaining member 250 when connected. More particularly, the backing plate 249a includes a recess 249d sized and configured to fit the protrusion 253 and the wings 253.1 as shown in FIG. 46. The backing plate 249a includes clips 249e extending from a lower end. The clips 249e are sized and configured to permit engagement of the locking body 249 with the wall panels 221 and the connection system 230. The locking body 249 may include a block 249f protruding from the backing plate 249a. The block 249f is sized and configured for insertion into the retaining member 250. As illustrated in FIGs. 43 and 44, the insertion members 249b are configured to fit on either side of the cross bar 248a of the coupling element 248. During assembly of the modular roof structure, adjacent lid panels are 241 coupled to the strut 247. In particular, the roof 251 .1 of the retaining member is inserted into the internal aperture 247c of the strut 247. The end of the strut 247 without the retaining member is inserted into the notch 246a whilst the slot 255a of the retaining member 250 is placed along a top edge of an assembled connection system 230 of adjacent wall panels 221. The lid panel 241 having the locator 242 engaged theron is placed between adjacent, assembled struts 247 by inserting the side flange 241 b into the central channel 247a, and the cleft 242a is positioned along the upper edge of the wall panel 221 . The coupling element 248 is then slideably inserted into the strut 247, and locked in position by inserting the insertion members 249b into the respective recesses of the coupling element 248 and pressing the locking body 249 into the retaining member 250 to thereby lock the assembly. The process of locking adjacent lid panels 241 to a strut 247 using the coupling element 248 and the locking body 249 is repeated to the form the modular roof structure 240 of the storage tank assembly 200.

[1 17] A person of skill in the art will appreciate that the storage tank assembly 200 may include other features that have utility in a particular application as illustrated, for example, in FIG. 47. This embodiment is particularly suitable as a water collection and storage tank, and included therein is a water inlet strainer 270 located on the roof structure 240. Overflow from the storage tank assembly 200 is controlled by an overflow pipe 280 located generally at the top of the cylinder 220. A tap hole 290 may be positioned at a lower level of the cylinder 220 to enable a liquid to flow out of the storage tank assembly 200.

[1 18] Referring to FIGs. 48 to 50, there is shown various alternative embodiments of the connection system 30, 230 in the form of connection system 30a, 30b and 30c respectively. The connection system 30a, 30b and 30c are generally of a more rounded configuration than the connection system 20. With reference to the preceding drawings, like reference numerals refer to like parts, unless otherwise specified. Furthermore, any characteristics or attributes described with reference to connection system 30 are to be understood as being applicable to connection system 30a, 30b and 30c, and vice versa, unless otherwise specified. FIG. 48 shows the connection system 30a, which includes a wall panel end member 31 a configured to (i) receive a connector 35a; and (ii) receive an end of the wall panel 21 a. The wall panel end member 31 a includes a passage 32, which may be a transverse passage, for slidably receiving the connector 35a, which will be discussed in more detail below. A channel in the form of a generally L-shaped channel 34a is formed through the body 33a of the wall panel end member 31 a and can receive a bent edge 22a of the end of the wall panel 21 a. The wall panel end member 31 a may be an extrusion separately connectable to the wall panel 21 a or alternatively, the wall panel end member 31 a may be integral with the wall panel 21 a. The connector 35a is generally H-shaped and includes a cross bar 36a with each end of the cross bar 36a integral with a pair of arm members 37a extending in opposing directions perpendicular to the cross bar 36. Each arm member 37a terminates in a foot 38 inwardly facing the cross bar 36a. The foot 38a has a face 39a that is inwardly directed towards the cross bar 36a.

[1 19] Referring to FIG. 49 there is shown the connection system 30b which includes a wall panel end member 31 b configured to (i) receive a connector 35b; and (ii) receive an end of the wall panel 21 b. The wall panel end member 31 b includes a passage 32b that may be a transverse passage, for slidably receiving the connector 35b, which will be discussed in more detail below. A channel in the form of a generally curved L-shaped channel 34b is formed through the body 33b of the wall panel end member 31 b and can receive a bent edge 22b of the end of the wall panel 21 b. The body 33b is extends further along the wall panel 21 b than that of connection system 30a and 30c. The wall panel end member 31 b may be an extrusion separately connectable to the wall panel 21 b or alternatively, the wall panel end member 31 b may be integral with the wall panel 21 b. The connector 35b is generally H-shaped and includes a cross bar 36b with each end of the cross bar 36b integral with a pair of arm members 37b extending in opposing directions perpendicular to the cross bar 36b. Each arm member 37b terminates in a foot 38 inwardly facing the cross bar 36b. The foot 38b has a face 39b that is inwardly directed towards the cross bar 36b. Extending from about a central position on cross bar 36b is a protrusion 36.1 b. More particularly, the protrusion 36.1 b extends bilaterally from cross bar 36b such that the protrusion 36.1 b abuts each face of opposing feet 38b. This configuration of protrusion 36.1 b relative to the wall panel end member 31 b may provide additional stability to the connection system 30b.

[120] Referring to FIG. 50, there is the connection system 30c which includes a wall panel end member 31 c configured to (i) receive a connector 35c; and (ii) receive an end of the wall panel 21 c. The wall panel end member 31 c includes a passage 32c that may be a transverse passage, for slidably receiving the connector 35a, which will be discussed in more detail below. A channel in the form of a generally curved L- shaped channel 34c is formed through a body 33c of the wall panel end member 31 c and can receive a bent edge 22c of the end of the wall panel 21 c. The wall panel end member 31 c may be an extrusion separately connectable to the wall panel 21 c or alternatively, the wall panel end member 31 c may be integral with the wall panel 21 c. The connector 35c includes a cross bar 36c with each end of the cross bar 36c integral with a pair of arm members 37c extending in opposing directions to the cross bar 36c. Each arm member 37c terminates in a foot 38c inwardly facing the cross bar 36c. The foot 38c has a face 39c that is inwardly directed towards the cross bar 36c. Extending from about a central position on cross bar 36c is a protrusion 36.1 c. Protrusion 36.1 c extends from one side of cross bar 36c such that the protrusion 36.1 c abuts each face of opposing feet 38c. The pair of arm members 37c and consequently passage 32c are offset from perpendicular such that the opposing feet 38a on the side without protrusion 36.1 c are in closer proximity to opposing feet 38a on the side where protrusion 36.1 c is present. This configuration also results in the foot 38a of the wall panel end member 31 c being slightly angled outwardly compared to connection system 30, 230, and 30b. It is envisaged that a non-limiting advantage of connection system 30b may be an alternative distribution of stresses on the wall panel end member 31 c. [121] As described hereinabove in relation to the connection system 30, the passage 32a, 32b, 32c is shaped to accommodate the arm member 37a, 37b, 37c and the cross bar 36a, 36b, 36c of the connector 35a, 35b, 35c. In particular, a complementary shape is formed from alignment of each passage 32a, 32b, 32c when opposing panel end members 31 a, 31 b, 31 c are adjoined prior to connection. The connector 35 can then be slidably received by the cognate shape formed by joining each passage 32a, 32b, 32c. The passage 32a, 32b, 32c is configured to slideably receive the arm members 37a, 37b, 37c and the cross bar 36a, 36b, 36c of the connector 35a, 35b, 35c. A non-limiting feature of this system is that when fully engaged, the connector 35a, 35b, 35c locks internally due, at least in part, to the face 39a, 39b, 39c of each foot 38a, 38b, 38c bearing upon the internal surface of the groove of the passage 32a, 32b, 32c. The stability of the resulting connection along a length of the connector 35a, 35b, 35c and the edge of a length of each wall panel end member 31 a, 31 b, 31 c is a non-limiting advantage conferred by the connection system 30. [122] Components, or parts, of the connection system 30, 30a, 30b, 30c and 230 may be formed from the same, or different materials. The connection system 30, 30a, 30b, 30c and 230 may be formed from the same, or different materials to the wall panels 21 , 21 a, 21 b, 21 c and 221. The connection system 30, 30a, 30b, 30c and 230, or a part thereof, may be formed from a plastics material, a metal material or a fibreglass. A non-limiting example of a suitable metal material may be aluminium. It will be appreciated that a plastics material of suitable structural integrity may also be employed. Suitably, the material is a plastics material. The plastics material may be a polyethylene such as, but not limited to high-density polyethylene. Alternatively, the plastics material may be a polypropylene. Other non-limiting examples of a plastics include polyvinyl chloride (PVC) and polyvinylidene fluoride (PVDF). The material from which the wall panel 21 is formed may be food contact approved.

[123] The present disclosure contemplates a flat pack kit comprising a plurality of wall panels and a connection system as hereinbefore described.

[124] One or more advantages of the present disclosure described herein include, but are not limited, to: (i) minimal tools are required; (ii) no technical skills or experience are necessary to assemble or utilise the present disclosure; (iii) allows for easy and speedy assembly of a tank structure; (iv) the connection system locks internally, thereby obviating the need for other locking elements; and/or (v) the connection system is load bearing.

[125] The appended claims are to be considered as incorporated into the above description.

[126] Throughout the specification, including the claims, where the context permits, the term "comprising" and variants thereof such as "comprise" or "comprises" are to be interpreted as including the stated integer or integers without necessarily excluding any other integers. [127] It is to be understood that the terminology employed above is for the purpose of description and should not be regarded as limiting. The described embodiments are intended to be illustrative of the present disclosure, without limiting the scope thereof. The present disclosure is capable of being practised with various modifications and additions as will readily occur to those skilled in the art. [128] Various substantially and specifically practical and useful exemplary embodiments of the claimed subject matter, are described herein, textually and/or graphically, including the best mode, if any, known to the inventors for carrying out the claimed subject matter. Variations (e.g., modifications and/or enhancements) of one or more embodiments described herein might become apparent to those of ordinary skill in the art upon reading this application. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the claimed subject matter to be practiced other than as specifically described herein. Accordingly, as permitted by law, the claimed subject matter includes and covers all equivalents of the claimed subject matter and all improvements to the claimed subject matter. Moreover, every combination of the above described elements, activities, and all possible variations thereof are encompassed by the claimed subject matter unless otherwise clearly indicated herein, clearly and specifically disclaimed, or otherwise clearly contradicted by context.

[129] The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate one or more embodiments and does not pose a limitation on the scope of any claimed subject matter unless otherwise stated. No language in the specification should be construed as indicating any non- claimed subject matter as essential to the practice of the claimed subject matter.

[130] Thus, regardless of the content of any portion (e.g., title, field, background, summary, description, abstract, drawing, figure, etc.) of this application, unless clearly specified to the contrary, such as via explicit definition, assertion, or argument, or clearly contradicted by context, with respect to any claim, whether of this application and/or any claim of any application claiming priority hereto, and whether originally presented or otherwise: a. there is no requirement for the inclusion of any particular described or illustrated characteristic, function, activity, or element, any particular sequence of activities, or any particular interrelationship of elements; b. no characteristic, function, activity, or element is "essential"; c. any elements can be integrated, segregated, and/or duplicated; d. any activity can be repeated, any activity can be performed by multiple entities, and/or any activity can be performed in multiple jurisdictions; and e. any activity or element can be specifically excluded, the sequence of activities can vary, and/or the interrelationship of elements can vary.

[131] The use of the terms "a", "an", "said", "the", and/or similar referents in the context of describing various embodiments (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms "comprising," "having," "including," and "containing" are to be construed as open-ended terms (i.e., meaning "including, but not limited to,") unless otherwise noted.

[132] Moreover, when any number or range is described herein, unless clearly stated otherwise, that number or range is approximate. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value and each separate subrange defined by such separate values is incorporated into the specification as if it were individually recited herein. For example, if a range of 1 to 10 is described, that range includes all values therebetween, such as for example, 1.1 , 2.5, 3.335, 5, 6.179, 8.9999, etc., and includes all subranges therebetween, such as for example, 1 to 3.65, 2.8 to 8.14, 1.93 to 9, etc.

[133] Words indicating direction or orientation, such as "front", "rear", "back", etc, are used for convenience. The inventor(s) envisages that various embodiments can be used in a non-operative configuration, such as when presented for sale. Thus, such words are to be regarded as illustrative in nature, and not as restrictive.

[134] Each embodiment described herein is to be applied mutatis mutandis to each and every embodiment unless specifically stated otherwise

[135] Accordingly, every portion (e.g., title, field, background, summary, description, abstract, drawing figure, etc.) of this application, other than the claims themselves, is to be regarded as illustrative in nature, and not as restrictive, and the scope of subject matter protected by any patent that issues based on this application is defined only by the claims of that patent.