AU2018203989A1 - A safety mesh - Google Patents

A safety mesh Download PDF

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Publication number
AU2018203989A1
AU2018203989A1 AU2018203989A AU2018203989A AU2018203989A1 AU 2018203989 A1 AU2018203989 A1 AU 2018203989A1 AU 2018203989 A AU2018203989 A AU 2018203989A AU 2018203989 A AU2018203989 A AU 2018203989A AU 2018203989 A1 AU2018203989 A1 AU 2018203989A1
Authority
AU
Australia
Prior art keywords
strands
primary
grid
safety mesh
mesh
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
AU2018203989A
Inventor
Daniel Eade
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scafclad Pty Ltd
Suvla Properties Pty Ltd
Original Assignee
Scafclad Pty Ltd
Suvla Properties Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to AU2017902137A priority Critical patent/AU2017902137A0/en
Priority to AU2017902137 priority
Application filed by Scafclad Pty Ltd, Suvla Properties Pty Ltd filed Critical Scafclad Pty Ltd
Publication of AU2018203989A1 publication Critical patent/AU2018203989A1/en
Pending legal-status Critical Current

Links

Abstract

A safety mesh for use with scaffolding, the safety mesh including a primary grid having a plurality of primary strands, and a secondary grid having a plurality of 5 secondary strands, wherein each of the plurality of primary strands has a higher breaking strength than each of the plurality of secondary strands, and wherein the secondary grid is attached to the primary grid. c.J co) (0) (U-

Description

FIELD OF INVENTION
The present invention relates to a safety mesh. Reference will be made in the specification to the use of the invention with respect to scaffolding. The patent specification describes this use but it is by way of example only and the invention is not limited to this use.
BACKGROUND OF THE INVENTION
Safety mesh is installed on scaffolding to prevent workers, objects and tools from falling off the scaffolding. The safety mesh also prevents falling objects from hitting workers that are working on or around the scaffolding.
A 50mm x 50mm safety mesh is currently installed on scaffolding. This mesh provides sufficient strength but does not provide adequate protection against smaller 5 objects falling through the gaps of the mesh. A 25mm x 25mm safety mesh has been used with scaffolding. However, the 25mm x 25mm safety mesh is approximately twice as heavy as the 50mm x 50mm safety mesh and thus requires additional clips to ensure that the mesh is safely supported on the scaffolding.
To address the problem of large gaps where smaller objects can fall through, 0 shade cloth type liners have been used. The shade cloth type liners have been attached to the safety mesh to provide additional protection. However, a problem with attaching a liner to the safety mesh is that it increases the wind load of the safety mesh.
OBJECT OF THE INVENTION
It is an object of the present invention to overcome or at least alleviate one or more of the above problems with safety mesh and/or provide the consumer with a useful or commercial choice.
SUMMARY OF THE INVENTION
In one aspect, the present invention broadly resides in a safety mesh for use with scaffolding, the safety mesh including a primary grid having a plurality of primary strands; and a secondary grid having a plurality of secondary strands,
-22018203989 06 Jun 2018 wherein each of the plurality of primary strands has a higher breaking strength than each of the plurality of secondary strands, and wherein the secondary grid is attached to the primary grid.
Preferably the plurality of secondary strands define substantially rectangular openings. More preferably the plurality of secondary strands define substantially square openings. Alternatively, the plurality of secondary strands define substantially rhombus shaped openings. In another embodiment, the plurality of secondary strands define substantially round openings.
Preferably the plurality of primary strands define substantially rectangular openings. More preferably the plurality of primary strands define substantially square openings. Alternatively, the plurality of primary strands define substantially rhombus shaped openings. In another embodiment, the plurality of primary strands define substantially round openings.
Preferably each of the plurality of primary strands has a breaking strength that is at least twice the breaking strength of one of the plurality of secondary strands.
Preferably each of the plurality of primary strands has a minimum breaking strength of 0.1 kN. More preferably the breaking strength of each of the plurality of primary strands is at least 1.86kN.
Preferably the secondary grid has a bursting pressure of at least 1000kPa.
Preferably the bursting pressure of the secondary grid is determined according to
Australian Standard 2001.2.4.
Preferably, each of the plurality of primary strands has a width or diameter that is wider than each of the plurality of secondary strands. Preferably each of the plurality of primary strands has a width or diameter of 2.5mm to 15mm. Preferably 25 each of the plurality of secondary strands has a has a width or diameter of 1mm to 5mm.
Preferably each of the primary strands is spaced from a parallel portion of one of the plurality of primary strands by at least 10mm. Preferably each of the primary strands is spaced from a parallel portion of one of the plurality of primary strands by 30 between 20mm to 80mm. Preferably, each of the primary strands is spaced from a parallel portion of one of the plurality of primary strands by between substantially 25mm to 65mm. More preferably, each of the primary strands is spaced from a parallel portion of one of the plurality of primary strands by substantially 40mm to
-32018203989 06 Jun 2018
55mm. In one embodiment each of the primary strands is spaced from a parallel portion of one of the plurality of primary strands by up to 150mm.
Preferably each of the secondary strands is spaced from a parallel portion of one of the plurality of secondary strands by at least 1mm. Preferably each of the 5 secondary strands is spaced from a parallel portion of one of the plurality of secondary strands by between 3mm to 16mm. More preferably each of the secondary strands is spaced from a parallel portion of one of the plurality of secondary strands by between 8mm to 15mm. Preferably, each of the secondary strands is spaced from a parallel portion of one of the plurality of secondary strands 0 by between substantially 4mm to 7mm. More preferably, each of the secondary strands is spaced from a parallel portion of one of the plurality of secondary strands by substantially 5mm. In one embodiment, each of the secondary strands is spaced from a parallel portion of one of the plurality of secondary strands by up to 35mm. It will be appreciated that in this embodiment, the distance between adjacent portions 5 of the primary strands is greater than the distance between adjacent portions of the secondary strands.
Preferably each of the plurality of primary strands are made of metal. More preferably each of the plurality of primary strands is a steel wire. Preferably the steel wire has a tensile strength of at least 1,86kN.
In one embodiment, each of the plurality of primary strands are made of plastic. In one embodiment, the plurality of primary strands are made of plastic reinforced with polyester. Preferably the plastic is polyvinyl chloride, polypropylene, or polyethylene. Alternatively, each of the plurality of primary strands is made of steel, rubber or a composite material.
Preferably each of the plurality of secondary strands are made of plastic. In one embodiment, the plurality of secondary strands are made of plastic reinforced with polyester. Preferably the plastic is polyvinyl chloride, polypropylene, or polyethylene. Alternatively, each of the plurality of secondary strands is made of steel, rubber or a composite material.
In one embodiment, each of the primary strands includes reinforcing.
Preferably the reinforcing is made of metal. More preferably the reinforcing is made of steel.
Preferably the primary strands are woven or welded together where they intersect. In one embodiment, the primary strands are extruded in one piece.
-42018203989 06 Jun 2018
Preferably the secondary strands are extruded in one piece, or woven, knitted or welded where they intersect.
In another embodiment, each of the secondary strands includes reinforcing. Preferably the reinforcing is made of metal. More preferably the reinforcing is made 5 of steel. Alternatively, the reinforcing can include basalt, fibreglass, nylon, polyester, HDPE and/or a combination thereof. In a preferred embodiment, the reinforcing is a nylon or polyester reinforcing.
In one embodiment, the primary strands are steel wire and the primary grid is in the form of chain wire mesh. Preferably each end of each of the primary strands 0 is welded to an adjacent end of another of the primary strands.
Preferably the secondary grid is clipped to the primary grid. Preferably the secondary grid is attached to the primary grid by c-clips. In another embodiment, the primary grid and the secondary grid are fused together to form the safety mesh. Alternatively, the primary grid and the secondary grid are glued, welded, knotted, 5 knitted and/or laminated together to form the safety mesh. In another embodiment, the secondary grid is sewed to the primary grid. In a further embodiment, the secondary grid is secured to the primary grid by locating the secondary grid between primary strands of the primary grid. Preferably the primary strands on a first side of the secondary grid are positioned in a first direction and the primary strands on a 0 second side of the secondary grid are positioned in a second direction transverse to the first direction. Preferably the first direction is substantially at 90° to the second direction.
In one embodiment, the safety mesh further includes at least one primary indicator strand. Preferably the at least one primary indicator strand is removable 25 from the safety mesh. Preferably the at least one primary indicator strand has the same characteristics as one of the plurality of primary strands. Preferably the at least one primary indicator strand has the same strength as one of the plurality of primary strands. Preferably the at least one primary indicator strand has the same thickness as one of the plurality of primary strands. Preferably the at least one 30 primary indicator strand has the same width as one of the plurality of primary strands. Preferably the at least one primary indicator strand is made of the material as one of the plurality of primary strands. Preferably the spacing between the at least one primary indicator strand and an adjacent parallel portion of one of the
-52018203989 06 Jun 2018 plurality of primary strands is different to the spacing between two adjacent parallel portions of the primary strands.
In another embodiment, the safety mesh further includes at least one secondary indicator strand. Preferably the at least one secondary indicator strand is 5 removable from the safety mesh. Preferably the at least one secondary indicator strand has the same characteristics as one of the plurality of secondary strands. Preferably the at least one secondary indicator strand has the same strength as one of the plurality of secondary strands. Preferably the at least one secondary indicator strand has the same thickness as one of the plurality of secondary strands.
Preferably the at least one secondary indicator strand has the same width as one of the plurality of secondary strands. Preferably the at least one secondary indicator strand is made of the same material as one of the plurality of secondary strands.
Preferably the safety mesh complies with the requirements of Queensland Work Health and Safety Regulation 2011, section 315D.
In another aspect, the present invention broadly resides in a safety mesh for use with scaffolding, the safety mesh including a primary grid having a plurality of primary strands; and a secondary grid having a plurality of secondary strands, wherein each of the plurality of primary strands has a higher breaking strength 0 than each of the plurality of secondary strands, and wherein the secondary grid is attachable to the primary grid.
Preferably the secondary grid is attached to the primary grid prior to attaching the safety mesh to scaffolding. Alternatively, the secondary grid is attached to the primary grid after the primary grid has been attached to the scaffolding.
In another aspect, the present invention broadly resides in scaffolding having a safety mesh attached thereto, the safety mesh including a primary grid having a plurality of primary strands; and a secondary grid having a plurality of secondary strands, wherein each of the plurality of primary strands has a higher breaking strength 30 than each of the plurality of secondary strands, and wherein the secondary grid is attached to the primary grid.
The features described with respect to one aspect also apply where applicable to all other aspects of the invention. Furthermore, different combinations
-62018203989 06 Jun 2018 of described features are herein described and claimed even when not expressly stated.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the present invention can be more readily understood reference will now be made to the accompanying drawings which illustrate a preferred embodiment of the invention and wherein:
Figure 1 is a schematic view of a safety mesh according to an embodiment of the present invention;
Figure 2 is a schematic view of the primary grid of the safety mesh of Figure
1;
Figure 3 is a schematic view of a primary grid according to an embodiment of the present invention;
Figure 4 is a schematic view of a primary grid according to an embodiment of the present invention;
Figure 5 is a schematic view of a primary grid according to an embodiment of the present invention;
Figure 6 is a schematic view of a primary grid according to an embodiment of the present invention;
Figure 7 is a schematic view of a secondary grid according to an embodiment of the present invention;
Figure 8 is a schematic view of a secondary grid according to an embodiment of the present invention;
Figure 9 is a schematic view of a secondary grid according to an embodiment 25 of the present invention;
Figure 10 is a schematic view of a secondary grid according to an embodiment of the present invention;
Figure 11 is a schematic view of a safety mesh according to an embodiment of the present invention;
Figure 12 is a schematic view of a safety mesh according to an embodiment of the present invention; and
Figure 13 is a schematic view of a safety mesh according to an embodiment of the present invention.
2018203989 06 Jun 2018
-7DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to Figure 1, there is shown a safety mesh 10. The safety mesh 10 has a primary grid 12 and a secondary grid 14.
The primary grid 12 has a plurality of primary strands 16,18. The primary 5 strands 16,18 define rhombus shaped openings 20. The primary strands 16,18 are made of steel wire and form a chain wire mesh.
Ends 16a, 18a of the primary strands 16,18 are welded together.
The secondary grid 14 has a plurality of secondary strands 30,32 with a first set of the secondary strands 30 oriented substantially in the first direction 0 (horizontal), and a second set of the secondary strands 32 oriented at substantially 90° to the first set of the secondary strands 30.
The secondary strands 30,32 are made of plastic reinforced with polyester.
Each of the primary strands 16,18 has a higher breaking strength than each of the secondary strands 30,32. The primary strands 16,18 each have a breaking 5 strength of at least 1.86kN. The secondary grid 14 has a bursting pressure of at least 1000kPa.
Parallel portions of the primary strands 16 are spaced by about 50mm from each other.
The secondary strands 30 are spaced by about 10mm from an adjacent 0 secondary strand. The secondary strands 32 are spaced by about 10mm from an adjacent secondary strand.
The secondary grid 14 is attached to the primary grid 12 by c-clips 40.
Figure 2 shows a more detailed view of the primary grid 12, with the ends 16a, 18a of the primary strands 16,18 are welded together.
Figure 3 shows an alternate primary grid 112 with ends 116a, 118a of primary strands 116,118 twisted together.
Figure 4 shows an alternate primary grid 212, with primary strands 216 and 218 woven together.
Figure 5 shows an alternate primary grid 312, with primary strands 318 laid on 30 top of primary strands 316. Primary strands 316 and 318 are welded together where they intersect.
Figure 6 shows an alternate primary grid 412, with primary strands 418 and primary strands 416 woven together and dipped in PVC to form a one piece grid.
2018203989 06 Jun 2018
-8Figure 7 shows a secondary grid 514 with secondary strands 530 and 532. The secondary strands 530,532 are knitted together.
Figure 8 shows a secondary grid 614 with secondary strands 630 and 632. The secondary strands 630,632 are woven together.
Figure 9 shows a secondary grid 714 with secondary strands 730 and 732.
The secondary strands 730,732 are extruded as one piece.
Figure 10 shows a secondary grid 814 with secondary strands 830 and 832. The secondary strands 830,832 are knotted together.
Figure 11 shows a safety mesh 900 according to a further embodiment of the 0 present invention. The safety mesh 900 has primary grid 912 and a secondary grid 914. The primary grid 912 has primary strands 916,918. The Primary strands 916,918 are fused together. The secondary grid 914 has secondary strands 930,932. The secondary strands 930,932 are knitted together.
The secondary grid 914 is sewn to the primary grid 912 by thread 950
Figure 12 shows a safety mesh 1000 according to a further embodiment of the present invention. The safety mesh 1000 has primary grid 1012 and a secondary grid 1014. The primary grid 1012 has primary strands 1016,1018. The secondary grid 1014 has secondary strands 1030,1032. The secondary strands 1030,1032 are knitted together. The secondary grid 1014 is located between 0 primary strands 1016 and primary strands 1018.
The secondary grid 1014 is sewn to the primary grid 1012 by thread 1050.
The primary strands 1016,1018 are glued together where they intersect.
Figure 13 shows a safety mesh 1100 according to a further embodiment of the present invention. The safety mesh 1100 has primary grid 1112 and a 25 secondary grid 1114. The primary grid 1112 has primary strands 1116,1118. The secondary grid 1114 has secondary strands 1130,1132. The secondary strands 1130,1132 are knitted together. The secondary grid 1114 is located between primary strands 1116 and primary strands 1118.
The primary strands 1116,1118 are high frequency welded together where 30 they intersect. The welding together of the primary strands 1116,1118 attaches the secondary grid to the primary grid.
-92018203989 06 Jun 2018
ADVANTAGES
An advantage of the preferred embodiment of the safety mesh includes less wind load compared to prior art safety meshes having shade cloth type liners. A further advantage of the preferred embodiment of the safety mesh includes the 5 ability to exchange the secondary grid.
VARIATIONS
It will of course be realised that while the foregoing has been given by way of illustrative example of this invention, all such and other modifications and variations 0 thereto as would be apparent to persons skilled in the art are deemed to fall within the broad scope and ambit of this invention as is herein set forth.
Throughout the description and claims of this specification the word “comprise” and variations of that word such as “comprises” and “comprising”, are not intended to exclude other additives, components, integers or steps.

Claims (20)

1. A safety mesh for use with scaffolding, the safety mesh including a primary grid having a plurality of primary strands; and
2. A safety mesh as claimed in claim 1, wherein the plurality of primary strands define substantially rectangular openings and the plurality of secondary strands define substantially rectangular openings.
3. A safety mesh as claimed in claim 1 or claim 2, wherein each of the plurality
4. A safety mesh as claimed in any one of the preceding claims, wherein the breaking strength of each of the plurality of primary strands is at least 1.86kN, and
0 the secondary grid has a bursting pressure of at least 1000kPa.
5 a primary grid having a plurality of primary strands; and a secondary grid having a plurality of secondary strands, wherein each of the plurality of primary strands has a higher breaking strength than each of the plurality of secondary strands, and wherein the secondary grid is attachable to the primary grid.
5. A safety mesh as claimed in any one of the preceding claims, wherein each of the plurality of primary strands has a width or diameter of 2.5mm to 15mm, and each of the plurality of secondary strands has a has a width or diameter of 1mm to 5mm.
5 of primary strands has a breaking strength that is at least twice the breaking strength of one of the plurality of secondary strands.
5 a secondary grid having a plurality of secondary strands, wherein each of the plurality of primary strands has a higher breaking strength than each of the plurality of secondary strands, and wherein the secondary grid is attached to the primary grid.
0
6. A safety mesh as claimed in any one of the preceding claims, wherein each of the plurality of primary strands has a width or diameter that is wider than each of the plurality of secondary strands.
30
7. A safety mesh as claimed in any one of the preceding claims, wherein each of the primary strands is spaced from a parallel portion of one of the plurality of primary strands by substantially 40mm to 55mm, and each of the secondary strands is spaced from a parallel portion of one of the plurality of secondary strands by between 3mm to 16mm.
8. A safety mesh as claimed in any one of the preceding claims, wherein each of the plurality of primary strands are made of metal. More preferably each of the plurality of primary strands is a steel wire.
9. A safety mesh as claimed in any one of claims 1 to 7, wherein the plurality of primary strands are made of plastic reinforced with polyester.
10. A safety mesh as claimed in any one of the preceding claims, wherein the 0 primary strands are woven or welded together where they intersect.
11. A safety mesh as claimed in any one of the preceding claims, wherein the secondary strands are extruded in one piece, or woven, knitted or welded where they intersect.
- 11 2018203989 06 Jun 2018
- 12 2018203989 06 Jun 2018 secondary strands is different to the spacing between two adjacent parallel portions of the secondary strands.
12. A safety mesh as claimed in any one of the preceding claims, wherein the secondary grid is clipped to the primary grid.
13. A safety mesh as claimed in any one of the preceding claims, wherein the 0 primary grid and the secondary grid are fused together to form the safety mesh.
14. A safety mesh as claimed in any one of the preceding claims, further including at least one primary indicator strand removable from the safety mesh, the at least one primary indicator strand having the same characteristics as one of the plurality of
25 primary strands, wherein the spacing between the at least one primary indicator strand and an adjacent parallel portion of one of the plurality of primary strands is different to the spacing between two adjacent parallel portions of the primary strands.
30
15. A safety mesh as claimed in any one of the preceding claims, further including at least one secondary indicator strand removable from the safety mesh, the at least one secondary indicator strand having the same characteristics as one of the plurality of secondary strands, wherein the spacing between the at least one secondary indicator strand and an adjacent parallel portion of one of the plurality of
16. A safety mesh for use with scaffolding, the safety mesh including
17. A safety mesh as claimed in claim 16, wherein the secondary grid is attached to the primary grid prior to attaching the safety mesh to scaffolding.
18. A safety mesh as claimed in claim 16, wherein the secondary grid is attached 5 to the primary grid after the primary grid has been attached to the scaffolding.
19. Scaffolding having a safety mesh as claimed in any one of the preceding claims attached thereto.
0
20. Scaffolding having a safety mesh attached thereto, the safety mesh including a primary grid having a plurality of primary strands; and a secondary grid having a plurality of secondary strands, wherein each of the plurality of primary strands has a higher breaking strength than each of the plurality of secondary strands, and wherein the secondary grid is 25 attached to the primary grid.
AU2018203989A 2017-06-06 2018-06-06 A safety mesh Pending AU2018203989A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2017902137A AU2017902137A0 (en) 2017-06-06 A safety mesh
AU2017902137 2017-06-06

Publications (1)

Publication Number Publication Date
AU2018203989A1 true AU2018203989A1 (en) 2018-12-20

Family

ID=64662305

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2018203989A Pending AU2018203989A1 (en) 2017-06-06 2018-06-06 A safety mesh

Country Status (1)

Country Link
AU (1) AU2018203989A1 (en)

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