AU2015218479B2

AU2015218479B2 - A concrete formwork brace

Info

Publication number: AU2015218479B2
Application number: AU2015218479A
Authority: AU
Inventors: Haydn Major; Jarred Telford
Original assignee: Zhm Engineering Services Ltd
Current assignee: Zhm Engineering Services Ltd
Priority date: 2014-08-26
Filing date: 2015-08-26
Publication date: 2019-12-19
Anticipated expiration: 2035-08-26
Also published as: NZ711497A; AU2015218479A1; AU2020202012A1

Abstract

This invention relates to a brace (1) for a formwork system used to form a concrete slab (2). The brace includes an anchor (3) and a body (4) which interacts with the anchor (3) to inhibit its movement. A support means (5) is associated with the body (4) which supports one or more edge boards (11a, 11b), when the brace is in use. <filename> 9a 8a 9b 0 4 r8b6 - 7 lib 12b ha ~ ~1l2a c8b lib (12b 13b

Description

A CONCRETE FORMWORK BRACE

TECHNICAL FIELD [0001] This invention relates to a brace for forming a formwork system, and a formwork system incorporating two or more of said braces. The invention has a particular application in forming an edge of a concrete slab on the ground however the invention may have other applications in forming other types of slabs. It will be convenient to hereinafter describe the invention with reference to this particular application however it is to be appreciated that the invention is not to be limited to this application only.

BACKGROUND OF INVENTION [0002] Formwork is used to provide temporary support to concrete while it cures. A concrete slab when formed on the ground will generally require formwork to temporarily support the edge of the concrete slab. The formwork can include a timber peg which is driven into the ground, with a timber board fastened to the timber peg. It is generally desirable for the upper edge of the board be set at a height which defines the upper surface of the slab as it makes it easier for the concreters to trowel to a set height.

SUMMARY OF INVENTION [0003] One or more nails are generally driven through the front face of the board, and into the peg which is supporting the rear face of the board. After the concrete has cured, the pegs need to be removed and detached from the boards. This often results in the pegs being damaged to an extent that they cannot be reused. Furthermore the boards need to be de-nailed so that they can be reused, which naturally takes time. Still furthermore the de-nailing generally results in the bending of the nails so they cannot be reused.

[0004] Generally the boards are 150mm high so if the slab is to be thicker than 150mm a second board can be fastened to the peg above the first board. Multiple boards may be required where the slab being formed is a waffle slab, as beams formed above ground form the edge of waffle slabs. However the extra force applied <filename>

2015218479 29 Nov 2019 by the weight of the concrete will generally require additional support to the peg. A second peg can be driven into the ground to the rear of the first peg, with a brace fastened to the top of the first peg and fastened to the second peg adjacent the ground. Naturally this will consume further pegs and nails which adds to the setup costs.

[0005] It is often desirable for the slab to be formed with a rebate along its edge to accommodate a brick wall, a timber stud wall of a combination of both. This requires the upper board to be set in from the bottom board which is supported in this position by a whaler fastened near the tops of the first and second pegs. Arranging the two pegs, the brace and the whaler to support the parallel offset boards requires a level of skill. Furthermore the use of nails in creating the structure makes it difficult to adjust once the nails are driven in.

[0006] A reference herein to a patent document or other matter which is given as prior art is not to be taken as an admission that that document or matter was known or that the information it contains was part of the common general knowledge as at the priority date of any of the claims.

[0007] According to one aspect of this invention there is provided a brace for a formwork system used to form a concrete slab on a ground surface, the brace including an anchor means which in use is driven through the ground surface, a body that is located in use adjacent the ground surface and interacts with the anchor means so as to inhibit movement of the body across the ground surface, a support means associated with the body that is adjustable relative to the body, when in use the support means supports one or more edge boards when forming an edge of the concrete slab wherein the support means includes two support elements, each support element is configured to facilitate connecting each support element to its respective edge board while still permitting limited vertical movement of each edge board relative to its respective support element, and the support means includes an arm extending substantially perpendicular from each support element, each arm being connected to the body so as to slide independently of each other and relative to the body.

2015218479 29 Nov 2019 [0008] The support means may take any form and may include two support elements, each support element engaging its respective edge board when in use. Each support element may be configured to facilitate connecting each support element to its respective edge board while still permitting limited movement of each edge board relative to its respective support element. This may take any form and in one form each support element includes at least one slot so as to permit attachment to and also adjustment of each edge board relative to the support element. More preferably each support element includes two slots, with each slot being aligned along axis which are substantially perpendicular to each other. Each support element may be configured to facilitate fastening each support element to its respective edge board so as to inhibit movement of each edge board relative to its respective support element. This may take the form of a cylindrical hole to receive and retain a screw fastener or the like.

[0009] The support means may also include an arm extending substantially perpendicular from each support element, each arm being connected to the body so as to slide relative to the body. The support means may also include an arm fastener for each arm that inhibits movement of each arm relative to the body when the arm fastener is active while permitting movement of each arm relative to the body when inactive.

[0010] Each arm may be connected to its respective support element in a in a position offset from the centre of each support element. This allows for the arm to be rotated to adjust for edges boards of differing height, and to keep the board free to screed the concrete to the top of the edge.

[0011] The body may include two arm sleeves one for each arm, each arm sleeve interacting with each arm so as to limit movement of each arm to linear movement. The arm sleeves are preferably positioned so as to include a top arm sleave and a bottom arm sleave with the top arm sleave positioned above and parallel to the bottom arm sleave. The arm sleeves may each have an open end to receive the respective arm, with the open end of the top arm sleeve being offset from the open end of the bottom arm sleeve. The offset may be of any suitable size however the preferred offset is about 150mm <filename>

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2015218479 29 Nov 2019 [0012] The body may include a base which extends substantially parallel to each arm sleeve, whereby the base engages the ground when the brace is in use. The base need not engage the ground when in use.

[0013] Where the anchor means includes a front shaft and a rear shaft, and the body will include a front sleeve and a rear sleeve to accommodate the front shaft and rear shaft respectively. The front sleeve may be arranged substantially perpendicular to each arm sleeve. The rear sleeve may be arranged at an acute angle to each arm sleeve or alternatively perpendicular to each arm sleeve. The anchor means may include a shaft fastener for each shaft that inhibits movement of the body relative to each shaft when the shaft fastener is active while permitting movement of the body <filename>

2015218479 26 Aug 2015 relative to the shaft when inactive. The shaft fasteners preferably interact with the front sleeve and rear sleeve so as to retain the position said sleaves along the shafts.

[0014] The brace may be formed from any suitable material. One suitable material for the body to be formed from is metal.

[0015] According to another aspect of this invention there is provided formwork system for forming a concrete slab on a ground surface including an anchor means which in use is driven through the ground surface, two or more stackable bodies that interact with the anchor means so as to inhibit movement of the bodies across the ground surface, two or more support means each being associated with its respective body, each support means being adjustable relative to its respective body, one of the support means being positionable above the other support means when the bodies are stacked, and two or more edge boards for forming an edge of the concrete slab, each edge board being supported by its respective support means, one of the edge boards being supported in a positioned above the other edge board when the bodies are stacked.

[0016] The support means may take any form and may include two support elements, each support element engaging its respective edge board when in use. Each support element may be configured to facilitate connecting each support element to its respective edge board while still permitting limited movement of each edge board relative to its respective support element. This may take any form and I one form each support element includes at least one slot so as to permit attachment to and also adjustment of each edge board relative to the support element. Each support element may be configured to facilitate fastening each support element to its respective edge board so as to inhibit movement of each edge board relative to its respective support element. This may take the form of a cylindrical hole to receive and retain a screw fastener or the like.

[0017] The support means may also include an arm extending substantially perpendicular from each support element, each arm being connected to the body so as to slide relative to the body. The support means may also include an arm fastener for each arm that inhibits movement of each arm relative to the body when the arm <filename>

2015218479 26 Aug 2015 fastener is active while permitting movement of each arm relative to the body when inactive.

[0018] Each arm may be connected to its respective support element in a in a position offset from the centre of each support element. This allows for the arm to be rotated to adjust for edges boards of differing height.

[0019] The body may include two arm sleeves one for each arm, each arm sleeve interacting with each arm so as to limit movement of each arm to linear movement. The arm sleeves are preferably positioned so as to include a top arm sleave and a bottom arm sleave with the top arm sleave positioned above and parallel to the bottom arm sleave. The arm sleeves may each have an open end to receive the respective arm, with the open end of the top arm sleeve being offset from the open end of the bottom arm sleeve. The offset may be of any suitable size however the preferred offset is about 150mm.

[0020] The body may include a base which extends substantially parallel to each arm sleeve, whereby the base engages the ground when the brace is in use. The base need not engage the ground when in use.

[0021] Where the anchor means includes a front shaft and a rear shaft, and the body will include a front sleeve and a rear sleeve to accommodate the front shaft and rear shaft respectively. The front sleeve may be arranged substantially perpendicular to each arm sleeve. The rear sleeve may be arranged at an acute angle to each arm sleeve or alternatively perpendicular to each arm sleeve. The anchor means may include a shaft fastener for each shaft that inhibits movement of the body relative to each shaft when the shaft fastener is active while permitting movement of the body relative to the shaft when inactive. The shaft fasteners preferably interact with the front sleeve and rear sleeve so as to retain the position said sleaves along the shafts.

[0022] The brace may be formed from any suitable material. One suitable material for the body to be formed from is metal.

BRIEF DESCRIPTION OF DRAWINGS [0023] In order that the invention may be more fully understood, some embodiments will now be described with reference to the figures in which:

2015218479 26 Aug 2015 [0024] Figure 1 is a side elevation view of a brace for a form work system supporting an edge of a waffle slab with a rebate.

[0025] Figure 2 is an isometric view of a preferred embodiment of a brace according to one aspect of the invention.

[0026] Figure 3 is a side elevation view of a brace for a form work system supporting an edge of a waffle slab.

[0027] Figure 4 is a rear elevation view of the brace from Figure 3.

[0028] Figure 5 is a side elevation view of a brace for a form work system supporting an edge of a waffle slab with a rebate.

[0029] Figure 6 is a rear elevation view of the brace from Figure 5.

[0030] Figure 7 a side elevation view of a form work system incorporating two braces supporting a side edge of a waffle slab with a rebate.

DETAILED DESCRIPTION [0031] Referring firstly to Figure 1 which illustrates a preferred embodiment of a brace 1 forming part of a form work system supporting a slab 2. The brace 1 according to the invention includes in summary an anchor means 3, a body 4 and a support means.

[0032] The body 4 according to the invention is located in use adjacent a ground surface 6 and interacts with the anchor means 3 so as to inhibit movement of the body 4 across the ground surface 6. Figure 1 illustrates the body 4, and in particular a base 7 of a body 4, engaging the ground surface along its entire length. Moreover, the base 7 may be partially or fully spaced from the ground surface 6 as will be explained later in the specification. Accordingly it is to be understood that the invention is not limited to having the body 4 engaging the ground surface 6.

[0033] The body 4 illustrated in Figure 1 includes two arm sleeves 8a, b which are illustrated extending parallel to one another, and both parallel to the base 7. The body 4 illustrated also includes a front sleeve 9a and rear sleeve 9b for accommodating the anchor means 3. The anchor means 3 may take any form, <filename>

2015218479 26 Aug 2015 however in the embodiment illustrated in at least Figure 1, the anchor means includes a front shaft 10a and a rear shaft 10b. When the brace 1 is installed the front shaft 10a extends through the front sleeve 9a and the rear shaft 10b extends through the rear sleeve 9b and is driven into the ground surface 6. The degree to which the front shaft 10a and rear shaft 10b are driven into the ground surface 6 may vary from that as illustrated in Figure 1.

[0034] The support means 5 according to the invention is required to support one or more edge boards 11a, b and forming an edge of the concrete slab 12. Figure 1 illustrates the support means 5 including two support elements 11a, b, each support element 12a, b engaging and supporting its respective board 11a, b relative to the body 4. Figure 1 illustrates the upper board 11a extending parallel to but offset from the lower board 11b which forms a rebate in the slab. The preferred offset is about 150mm, however this may vary depending upon the size of the rebate required. It is to be understood that the brace 1 may be used to form other types of slabs 2 which will be described in greater detail by reference to later illustrations.

[0035] Referring now to Figure 2 which illustrates an exploded isometric view of the brace 1 from Figure 1. This view of the brace 1 shows the front shaft 10a, and rear shaft 10b withdrawn from the front sleeve 9a and rear sleeve 9b respectively. Furthermore, each arm 13a, b of the support means 5 is shown withdrawn from its respective arm sleeve 8a, b. This was achieved by loosening shaft fasteners 14 and arm fasteners 15 from engagement with the shafts 10a, b and arms 13a, b respectively. Each shaft fastener 14 and arm fastener 15 may take any form, however in the embodiment illustrated the preferred form utilises a bolt which locates in a threaded aperture formed in the respective shaft 9a, b or sleeve 8a, b. The threaded aperture may take the form of a nut 16 welded to the body 4 adjacent an aperture formed in the sleeve 8, 9. This form of fastener is merely preferred, and other means for fastening the position of the shaft 10 or arm 13 relative its respective sleeve 8, 9 is clearly possible.

[0036] Figure 2 illustrates a preferred form of shaft 10 which is a cylindrical rod formed with a conical driving end 17 to facilitate piercing the ground surface. Whilst the rod illustrated is circular in cross-section it may be formed from any suitably <filename>

2015218479 29 Nov 2019 shaped rod. This may include a hollow rod, square cross-sectioned or angle section of rod.

[0037] The shape of the top sleeve 8a, bottom sleeve 8b, front sleeve 9a and rear sleeve 9b are illustrated as being formed from square shaped tubing. This shape may vary, and the invention is not limited to two utilising tubing of this shape. However the square shaped tubing has the advantage that it is relatively easy to weld together.

[0038] The preferred form of support means 5 is illustrated in Figure 2 as including two support elements 12a, b located at the distal end of respective arms 13a, b. It is preferred that the distal end of each arm 13a, b be attached to the support element 12a, b at a position located offset from the centre of the support element. In the embodiment illustrated, each support element 12a, b is in the form of a rectangular plate with the distal end of each arm 13a, b being welded to the respective plate 12a, b at a position located closer to a lower edge of each plate 12a, b. This allows for the orientation of each plate 12a, b to be adjustable relative to the top or bottom sleeve 8a, b, so as to adjust the height of support for each edge board 11 a, b as required. This adjustment of the orientation of the support element 12a, b will be described in greater detail with reference to later illustrations.

[0039] It is preferred that each plate 12a, b be provided with apertures for facilitating attachment to its respective edge boards 11a, b. Figure 2 illustrates the preferred embodiment of the plate 12a, b as including the combination of elongate slots 18 and circular holes 19. The slots 18 allow the plate 12a, b to be attached to the edge board 11a, b by a screw fastener whilst still allowing for some adjustment of the board 11a, b relative to the plate 11a, b. More specifically the slots 18 allow for vertical adjustment of the edge board 11a up to the preferred line for screeding the concrete to, while the edge board 11a is connected to the plate 11a. Once the final position of the edge board 11a is decided, that position can be fixed by inserting a screw fastener through any one of the circular holes 19. Clearly the number and location of the slots 18 and holes 19 may vary from that as illustrated in Figure 2.

[0040] Referring now to Figure 3 which illustrates a preferred embodiment of the brace 1 according to the invention in another configuration to that as illustrated in <filename>

2015218479 29 Nov 2019

Figure 1. Whilst Figure 1 illustrates the brace 1 forming a rebated edge in a waffle slab, Figure 3 illustrates the versatility of the brace by supporting a square sided edge beam 20 (without a rebate) for a waffle slab 2. In order to adjust the position of the lower arm 13b relative to the bottom sleeve 8b, the arm fastener 15 on the bottom sleeve 8b is released to allow the lower arm 13b to slide relative to the bottom sleeve 8b. This adjustment allows for the lower plate 12b to be aligned with the upper plate 12a so as to support the upper edge board 11a on top of the lower edge board 11a. Once the lower plate 12b is in this position and attached to the lower edge board 11b, the arm fastener 15 on the bottom sleeve 8b will be tightened to fix the position of the lower arm 13b relative to the bottom sleeve 8b.

[0041] Figure 4 illustrates an end elevation view of the brace 1 showing the orientation of each plate 12a, b relative to its respective top or bottom sleeve 8a, b. It should be noted that the top sleeve 12a, b and bottom sleeve 8b appear to be positioned equidistant between the top edge and bottom edge of each plate 12a, b while each plate 12a, b is on its side. This arrangement is particularly suitable where the height of each edge board 11a, b is approximately 150mm. However, Figure 5 illustrates another configuration of the brace 1 where the top edge board 11a is bigger than the bottom edge board 11a. The top edge board 11a may for example be 200mm high and the bottom edge board 11b may be only 150mm. In this arrangement, the top plate 12a is rotated so it is in a substantially vertical orientation before it is attached to the top edge board 11a. Figure 6 illustrates this alternative arrangement from an end elevation. It will be appreciated that by being able to adjust the orientation of the top plate 12a relative to the top edge board 11a allows the user to freely screed the concrete to the top of the top edge board 11 a without abutting the brace 1.

[0042] According to another aspect of the invention the body 4 of the brace may be combined with another body 4¹ for a formwork system. Figure 7 illustrates a preferred embodiment of how the two bodies 4, 4¹ may interact with the anchor means 3 to form such a form work system. It should be appreciated that this aspect of the invention is not limited to combining only two bodies 4, 4¹ and that it may combine more than two bodies 4, 4¹. Figure 7 illustrates an upper body 4¹ and a lower body 4 which are substantially similar to each other with the exception of the length of the top <filename>

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2015218479 29 Nov 2019 sleeve 8¹ a, bottom sleeve 8¹b and base 7¹ of the top body 8¹ being shorter than the top sleeve 8a, bottom sleeve 8b and base 7 of the bottom body 4 so as to allow the bodies 4, 4¹ to stack. This is as a result of the rear sleeve 9b, 9b¹ being on an angle relative to the top sleeve 8a, 8a¹ and bottom sleeve 8b 8b¹, however in another embodiment (not illustrated) the rear sleeve 9b 9b¹ is parallel to the front sleeve 9a, 9a¹, and perpendicular to the top sleeve 8a, 8a¹ and bottom sleeve8b, 8b¹. It should <filename>

2015218479 26 Aug 2015 be appreciated that orienting the rear sleeve 9b, 9b¹ in this manner would render the top body 4¹ and bottom body 4 interchangeable.

[0043] Whilst the embodiments illustrated in figures 1 to 7 all show perfectly horizontal ground surface 6, those skilled in the art will appreciate that most work sites are not this perfect. One advantage of the brace 1 and form works system according to the invention is that the shaft fasteners 14 can fasten the front sleeve 9a and rear sleeve 9b to the shafts 10a, b at any position in order to provide support for a vertical edge of the slab 2. More specifically, whilst in each of the embodiments illustrated the base 7 is in complete and direct engagement with the ground surface, this need not be the case.

[0044] Once the concrete slab 2 has cured, is it preferred that each brace 1 be formed with means for facilitating removal of each shaft 10a, b from the ground surface 6. This may take the form of a lever pad (not shown) attached to the upper surface of the top sleeve 8a against which a pivot bar (not shown) attached to either shaft can pivot. Clearly other means are possible.

[0045] The brace 1 may be formed from any suitable material. Whilst metal has been found to be most suitable by the inventor, other materials such as hardened plastics may also be suitable. In particular the support means 5 and shaft 10 may be formed from a mouldable plastic.

[0046] It ought to be appreciated from the foregoing that the brace 1, and form work system according to the invention provide a relatively unique alternative to the timber peg and brace arrangements currently in use. Furthermore, the adjustment of the arms 13a, b relative to the sleeves 8a, b increases the adaptability of the brace to accommodate slabs of a range of configurations.

[0047] Various alterations and/or additions may be introduced into the brace 1 and formwork system without departing from the spirit or ambit of the invention.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. A brace for a formwork system used to form a concrete slab on a ground surface, the brace including an anchor means which in use is driven through the ground surface, a body that is located in use adjacent the ground surface and interacts with the anchor means so as to inhibit movement of the body across the ground surface, a support means associated with the body that is adjustable relative to the body, when in use the support means supports one or more edge boards when forming an edge of the concrete slab wherein the support means includes two support elements, each support element is configured to facilitate connecting each support element to its respective edge board while still permitting limited vertical movement of each edge board relative to its respective support element, and the support means includes an arm extending substantially perpendicular from each support element, each arm being connected to the body so as to slide independently of each other and relative to the body.
2. A brace according to claim 1, wherein each support element is configured with at least one elongate slot to receive a fastener therethrough so as to facilitate connecting each support element to its respective edge board while still permitting limited movement of each edge board relative to its respective support element when in use.
3. A brace according to claim 2 wherein each support element is configured with two elongate slots which are aligned along axis that are substantially perpendicular to each other, either of which slot is to receive a fastener therethrough so as to facilitate connecting each support element to its respective edge board while still permitting limited movement of each edge board relative to its respective support element, when in use.
4. A brace according to claim 2 or 3 wherein each support element is configured with a circular hole to facilitate fastening each support element to its respective edge board so as to inhibit movement of each edge board relative to its respective support element.

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2015218479 29 Nov 2019
5. A brace according to any one of the preceding claims wherein the support means includes an arm fastener for each arm that inhibits movement of each arm relative to the body when the arm fastener is active while permitting movement of each arm relative to the body when inactive.
6. A brace according to claim 5 wherein each arm is connected to its respective support element in a position offset from the centre of each support element, so that in use the orientation of the support element relative to the respective edge board can be adjusted.
7. A brace according to any one of claims 5 or 6 wherein the body includes two arm sleeves one for each arm, each arm sleeve interacting with each arm so as to limit movement of each arm to linear movement.
8. A brace according to claim 7 wherein the arm sleeves are positioned so as to include a top arm sleave and a bottom arm sleave with the top arm sleave positioned above and parallel to the bottom arm sleave.
9. A brace according to claim 8 wherein the arm sleeves each have an open end to receive the respective arm, with the open end of the top arm sleeve being offset from the open end of the bottom arm sleeve.
10. A brace according to claim 9 wherein the offset is about 150mm.
11. A brace according to any one of claims 7 to 10 wherein the body includes a base which extends substantially parallel to each arm sleeve, whereby the base engages the ground when the brace is in use.
12. A brace according to any one of claims 7 to 11 wherein the anchor means includes a front shaft and a rear shaft, and the body includes a front sleeve and a rear sleeve to accommodate the front shaft and rear shaft respectively.

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2015218479 29 Nov 2019
13. A brace according to claim 12 wherein the front sleeve is arranged substantially perpendicular skewed lines to each arm sleeve, while the rear sleeve is arranged at an acute angle to each arm sleeve.
14. A brace according to claim 13 wherein the anchor means includes a shaft fastener for each shaft that inhibits movement of the body relative to each shaft when the shaft fastener is active while permitting movement of the body relative to the shaft when inactive.
15. A brace according to claim 14 wherein the shaft fasteners interact with the front sleeve and rear sleeve so as to position said sleaves along the shafts.
16. A brace according to any one of the preceding claims wherein the body is a frame formed from metal.
17. A formwork system for forming a concrete slab on a ground surface including an anchor means which in use is driven through the ground surface, two or more stackable bodies that interact with the anchor means so as to inhibit movement of the bodies across the ground surface, two or more support means each being associated with its respective body, each support means independently slidably adjustable relative to its respective body, one of the support means being positionable above the other support means when the bodies are stacked, and two or more edge boards for forming an edge of the concrete slab, each edge board being supported by its respective support means, one of the edge boards being supported in a positioned above the other edge board when the bodies are stacked wherein each support means includes two support elements, each support element is configured to facilitate connecting each support element to its respective edge board while still permitting limited vertical movement of each edge board relative to its respective support element.
18. A formwork system according to claim 17 wherein each support element is adjustable in its orientation to respective edge board.

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2015218479 29 Nov 2019
19. A formwork system according to claim 18 wherein each support element is configured with two elongate slots which are aligned along axis that are substantially perpendicular to each other, either of which slot is to receive a fastener therethrough so as to facilitate connecting each support element to its respective edge board while still permitting limited movement of each edge board relative to its respective support element, when in use.
20. A formwork system according to claim 18 or 19 wherein each support element is configured with a circular hole to facilitate fastening each support element to its respective edge board so as to inhibit movement of each edge board relative to its respective support element.
21. A formwork system according to any one of claims 18 to 20 wherein each support means includes an arm extending substantially perpendicular from each support element, each arm being connected to its respective body so as to slide relative to said body.
22. A formwork system according to claim 21 wherein each support means includes an arm fastener for each arm that inhibits movement of each arm relative to its respective body when the arm fastener is active while permitting movement of each arm relative to said body when inactive.
23. A formwork system according to claim 22 wherein each arm is connected to its respective support element in a position offset from the centre of said support element, so that in use the orientation of the support element relative to the respective edge board can be adjusted.
24. A formwork system according to any one of claims 21 to 23 wherein each body includes two arm sleeves one for each arm, each arm sleeve interacting with each arm so as to limit movement of each arm to linear movement.
25. A formwork system according to claim 24 wherein the arm sleeves are positioned so as to include a top arm sleave and a bottom arm sleave for each <filename>

2015218479 29 Nov 2019 respective body with the top arm sleave positioned above and parallel to the bottom arm sleave on said body.
26. A formwork system according to claim 25 wherein the arm sleeves each have an open end to receive the respective arm, with the open end of the top arm sleeve being offset from the open end of the bottom arm sleeve.
27. A formwork system according to claim 26 wherein the offset is about 125mm.
28. A formwork system according to any one of claims 24 to 25 wherein the anchor means includes a front shaft and a rear shaft, and each body includes a front sleeve and a rear sleeve to accommodate the front shaft and rear shaft respectively.
29. A formwork system according to claim 26 wherein each front sleeve is arranged substantially perpendicular to each arm sleeve, while each rear sleeve is arranged at an acute angle to each arm sleeve.
30. A formwork system according to claim 28 or 29 wherein the anchor means includes a shaft fastener for each shaft that inhibits movement of the body relative to each shaft when the shaft fastener is active while permitting movement of the body relative to the shaft when inactive.
31. A formwork system according to claim 30 wherein each shaft fastener interacts with a respective front sleeve or rear sleeve to position said sleeve relative to the shaft.
32. A formwork system according to any one of claims 17 to 31 wherein the body is a frame formed from metal.