AU2018100374B4 - Formwork for Creating Penetrations or Openings in Concrete Floor Structures - Google Patents
Formwork for Creating Penetrations or Openings in Concrete Floor Structures Download PDFInfo
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- AU2018100374B4 AU2018100374B4 AU2018100374A AU2018100374A AU2018100374B4 AU 2018100374 B4 AU2018100374 B4 AU 2018100374B4 AU 2018100374 A AU2018100374 A AU 2018100374A AU 2018100374 A AU2018100374 A AU 2018100374A AU 2018100374 B4 AU2018100374 B4 AU 2018100374B4
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- AU
- Australia
- Prior art keywords
- concrete floor
- openings
- safety
- safety barrier
- formwork
- 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.)
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Links
- 238000009415 formwork Methods 0.000 title claims abstract description 56
- 230000035515 penetration Effects 0.000 title claims abstract description 27
- 230000004888 barrier function Effects 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims description 17
- 238000007688 edging Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 210000003423 ankle Anatomy 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
- 12 Openings or penetrations in the cast concrete floors of multi-storey buildings are potential hazards in that workers can fall through such openings. The invention provides a robust 5 solution to this problem by providing formwork that can be used to create the openings or penetrations which themselves include a built-in safety barrier that prevents people falling through the openings. The safety barriers can be cast into the concrete floor along with the formwork, providing an effective safety barrier that is in place before the opening or penetration is even produced in the concrete floor. The nature of the safety barrier which 10 can be formed from reinforcing mesh or other metal bars can be easily cut or modified when required to allow pipework, ducting, or other services to pass through the openings. 208468AUProvSpecMar2018.docx/PA
Description
Formwork for Creating Penetrations or Openings in Concrete Floor Structures
FIELD OF THE INVENTION
This invention relates to formwork for creating penetrations or openings in concrete floor structures, and in particular, but not exclusively to formwork for creating penetrations or openings in the concrete floor structures of multi-story buildings to allow building services to run between floors.
BACKGROUND
During the construction of multi-story buildings it is usually necessary to provide openings in the floor structure of the various floors to allow building services such as plumbing, electrical wiring, air conditioning ducts to run between floors. These openings or penetrations in the floor structure are typically rectangular and typically have a size of about four hundred millimetres by six hundred millimetres.
During the on-going construction process, these opening or penetrations often present a safety hazard in that tools or other objects can be dropped through the openings, or a person can fall through an opening or at least into an opening. Over the years these openings have been the cause of many accidents on building sites.
While it is possible to provide safety rails, covers or guards to minimise the danger after the floors have been cast, there remains a danger during the intervening period between pouring the concrete floor and before the safety measures are put in place. And in any case, it can be expensive and time consuming to install these safety measures.
What is needed is a solution to this problem that is quick and easy to install and is low cost, and which provides safety from the moment the floor is cast.
In this specification unless the contrary is expressly stated, where a document, act or item of knowledge is referred to or discussed, this reference or discussion is not an admission that the document, act or item of knowledge or any combination thereof was at the priority date, publicly available, known to the public, part of common general knowledge; or known to be relevant to an attempt to solve any problem with which this specification is concerned.
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-22018100374 23 Oct 2019
OBJECT
It is therefore an object of the present invention to provide formwork for creating penetrations or openings in concrete floor structures which will at least go some way towards overcoming one or more of the above mentioned problems, or at least provide the 5 public with a useful choice.
STATEMENTS OF THE INVENTION
Accordingly, in a first aspect, the invention may broadly be said to consist in a formwork component for creating penetrations or openings in concrete floor structures, the formwork 10 component comprising a safety barrier and one or more sidewall members, the side wall members each having inner faces, and;
• the inner faces of the or each side wall member define an opening in a concrete floor structure, • the or each sidewall member is configured to prevent a wet concrete mix from entering the defined opening during the pouring of the concrete floor structure, • the safety barrier spans across the defined opening between opposing inner faces of the or each sidewall member, and • the or each sidewall member is configured to remain as a permanent edging of the defined opening after the concrete floor structure has cured;
and wherein the safety barrier extends beyond the or each sidewall member.
Preferably safety barrier extends beyond the or each sidewall member to the extent that, when in use, the safety barrier becomes structurally embedded in the cast concrete floor structure in which the formwork component is installed.
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2018100374 23 Oct 2019
-3 Preferably the safety barrier is configured to minimise the possibility that a human body could pass through the defined opening.
Preferably the safety barrier comprises one or more safety members.
Preferably the defined opening is a rectangular opening.
Preferably the formwork component has four sidewall components and the four sidewall components are joined to form a rectangle.
Preferably the or each side wall member has a substantially “L” or “C” shaped cross section.
Preferably the or each side wall member is made in two parts, comprising an upper member and a lower member.
Preferably the or each upper member has a substantially “C” shaped cross section and the or each lower member has a substantially “L” shaped cross section.
Preferably the or each upper member is welded to the or each lower member.
Preferably the or each safety member extends through the or each side wall member.
Preferably the or each safety member extends through the or each side wall member in a direction away from the defined opening by at least fifty millimetres.
Preferably the or each safety member extends through the or each side wall member in a plane adjacent to a plane defined by a join between the upper member and the lower member of the or each sidewall member.
Preferably the or each safety barrier is made from a section of mesh material.
Preferably the mesh material is a welded reinforcement mesh material.
Preferably an edge of the or each upper member or the or each lower member is provided with slots to accommodate the mesh material.
Optionally the or each safety member is made from a section of metal grating material.
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Optionally the safety barrier is fastened to the inner faces of the or each sidewall member.
In a second aspect, the invention may broadly be said to consist in formwork for constructing a building, or a part of a building, incorporating at least one formwork component for creating penetrations or openings in concrete floor structures substantially 5 as specified herein.
In a third aspect the invention may broadly be said to consist in a building incorporating at least one at least one formwork component for creating penetrations or openings in concrete floor structures substantially as specified herein.
The invention may also broadly be said to consist in the parts, elements and features referred 10 to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of the parts, elements or features, and where specific integers are mentioned herein which have known equivalents, such equivalents are incorporated herein as if they were individually set forth.
DESCRIPTION
Further aspects of the present invention will become apparent from the following description which is given by way of example only and with reference to the accompanying drawings in which:
FIGURE 1 is a perspective view of a first example of a formwork component for 20 creating penetrations or openings in concrete floor structures,
FIGURE 2 is a cross sectional view of the first example of the formwork for creating penetrations or openings in concrete floor structures,
FIGURE 3 is a cross sectional view of a second example of a formwork component for creating penetrations or openings in concrete floor structures, and
FIGURE 4 is a cross sectional view of a third example of a formwork component for creating penetrations or openings in concrete floor structures.
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First Example
With reference to Figures 1 to 2, a first example of a formwork component (11) according to the present invention will now be described. The formwork component (11) has been designed for use in producing openings or penetrations in a cast concrete floor structure or 5 similar cast concrete slab (12), and has the advantage that is provides a cast in safety barrier (13) right from the time that the concrete is poured to form the concrete floor structure (12) or slab within which the formwork component (11) is fitted.
The formwork component (11) becomes a part of the formwork that is used to create the poured concrete floor structure (12) of a multi-story building, and is used to produce an 10 opening or penetration in the floor structure through which building services can pass. The formwork component (11) is designed and constructed in such a manner that sidewall members (15) of the formwork component (11) become a permanent edging for the defined opening in the floor structure of a building when the concrete of the floor structure has cured.
In this example, the formwork component (11) has four sidewall members (15) that each have inner faces (17), and the inner faces (17) define an opening (19) in a concrete floor structure. And the four sidewall members (15) are configured to prevent a wet concrete mix from entering the defined opening (19) during the pouring of the concrete floor structure.
As noted above, the formwork component (11) also has a safety barrier (13) that spans between opposing sidewall members (15) and which is configured to minimise the possibility that a human body could pass through the defined opening, or to prevent the passage of a human body through the defined opening. In this example, the safety barrier (13) comprises a single safety member (21) in the form of a section or panel of welded 25 reinforcement mesh material. The welded reinforcement mesh material in this example comprises SL81 square reinforcing mesh which is made using 7.6 millimetre diameter steel wire, with a 100 millimetre distance between wire centres.
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The formwork component (11) has four sidewall members (15) and the four sidewall components are joined to form a rectangle, and the defined opening (19) created using the formwork component (11) is a rectangular opening.
Each side wall member (15) is made from folded galvanised sheet steel material and has a substantially “L” shaped cross section. In this example each side wall member (15) is made in two parts, comprising an upper member (23) and a lower member (25). Each upper member (23) has a substantially “C” shaped cross section and each lower member (25) has a substantially “L” shaped cross section.
The height and width of the lower members (25) is approximately four times larger than 10 the height and width of the upper members (23). The overall height of the sidewall members (15) is typically in the range of one hundred and fifty to two hundred and fifty millimetres high. The overall width of the sidewall members (15) is typically in the range of eighty to one hundred and fifty millimetres wide.
A lower edge (27) of each upper member (23) is provided with slots (29) (not shown) to 15 accommodate the bars of the mesh material. Each upper member (23) is welded to each lower member (25) and in this way the mesh material is captured within the structure of the sidewall members (15).
The safety member (21) extends through the side wall members (15) in a plane adjacent to a plane defined by a join between the upper member and the lower member of the sidewall 20 member (15). The mesh of the safety member (21) lies about thirty to eighty millimetres below an upper edge (31) of the sidewall members (15), and usually about fifty millimetres below the upper edge (31).
The safety member (21) occupies the full area of the defined opening (19) and extends through each side wall member (15). In this example, the openings in the mesh forming 25 the safety member (21) are square openings approximately ninety three millimetres by ninety three millimetres in size which are adequate to prevent the passage of a human body through an opening in a cast concrete floor structure in which the formwork component (11) is installed.
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-7As can be seen in figures 1 and 2, the safety member (21) extends beyond the sidewall members (15) to the extent that the outer edges of the safety member (21) becomes embedded in the surrounding concrete when concrete is poured about the formwork component (11). The reinforcing mesh of the safety member (21) extends through each side wall member (15) in a direction away from the defined opening by at least fifty millimetres, and preferably by one hundred to two hundred millimetres. This allows the reinforcing mesh of the safety member (21) to become structurally embedded in the cast concrete floor structure in which the formwork component (11) is installed, and provides rigid support for the safety member (21) about its entire perimeter. The cast-in-situ design also prevents the safety member (21) from being inadvertently removed or from falling out. In addition, the safety member (21) is installed during the process of making the opening in the cast concrete floor meaning that the opening is never left open right from the creation of the opening for maximum safety to the construction workers involved.
The safety barrier (13) can later be cut to form larger holes as required to allow pipes or ducting to be fitted through the opening. The use of reinforcing mesh allows many building services for example wiring to pass though the safety barrier (13) due to the generous size of the holes in the mesh, and in addition, the use of reinforcing mesh means that larger holes can be cut relatively easily when needed to install larger pipes or ducts, as the wire of the mesh can be cut quickly using bolt cutters or similar cutting apparatus.
Additional safety means, for example a plywood panel can be fitted over the mesh of the safety barrier (13) to further increase the safety provided by the barrier by helping to prevent ankle twists, or by preventing small objects from falling though the openings onto workers or staff below.
Second Example
With reference to Figure 3, a second example of a formwork component (61) according to the present invention will now be described. As with the first example described herein, the formwork component (61) has been designed for use in producing openings or penetrations in a cast concrete floor structure or similar cast concrete slab.
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The formwork component (61) also becomes a part of the formwork that is used to create the poured concrete floor structure of a multi-story building, and is used to produce an opening or penetration in the floor structure through which building services can pass. The formwork component (61) is designed and constructed in such a manner that sidewall 5 members (63) of the formwork component (61) become a permanent edging for a defined opening (65) in the floor structure of a building when the concrete of the floor structure has cured.
In this second example, a safety barrier (67) is in the form of a section of welded mesh or grating material that is sized to fit inside the defined opening (65). The safety barrier (67) 10 is fastened to inner faces (69) of each sidewall member (63). A ledge (71) is formed on each inner face (69) of each sidewall member (63) using a section of angle iron (73) that is fastened by welding, bolting or riveting, to the inner faces (69) of the sidewall members (63). And the safety barrier (67) rests on the ledge (71) and is fastened to the ledge (71) using threaded fasteners and clamps or welds.
Third Example
With reference to Figure 4, a third example of a formwork component (81) according to the present invention will now be described. As with the first and second examples described herein, the formwork component (81) has been designed for use in producing openings or penetrations in a cast concrete floor structure or similar cast concrete slab.
The formwork component (81) also becomes a part of the formwork that is used to create the poured concrete floor structure of a multi-story building, and is used to produce an opening or penetration in the floor structure through which building services can pass. The formwork component (81) is designed and constructed in such a manner that sidewall members (83) of the formwork component (81) become a permanent edging for a defined 25 opening (85) in the floor structure of a building when the concrete of the floor structure has cured.
In this second example, a safety barrier (87) is in the form of a section of grating material that is sized to fit inside the defined opening (85). The safety barrier (87) rests on, or is fastened to, a ledge (89) that extends about the periphery of the defined opening (85). The
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-92018100374 23 Oct 2019 ledge (89) is formed in the sidewall members (83) by joggling a step feature (91) into the vertical portion of each sidewall member (83). The grating material of the safety barrier (87) fits snuggly into the area defined by the outside dimensions of the area defined by the step features (91) of each sidewall member (83).
VARIATIONS
Aspects of the present invention have been described by way of example only and it should be appreciated that modifications and additions may be made thereto without departing from the scope thereof.
In the first example described herein, the formwork component (11) comprises four side wall members (15) forming a rectangular shape. However, in an alternative configuration, it is envisaged that the formwork component (11) could comprise a single circular or curved sidewall member, two curved members, three forming a triangular opening, or any number of sidewall members forming any shape. The essence of the invention is a formwork component that can be used to create an opening or penetration in a cast concrete structure, and to provide a safety barrier within that opening right from the time that the opening is formed.
The examples described herein include just one safety barrier (13) member in the form of a mesh panel, however, it is envisaged that an alternative embodiment of the formwork 20 components could include multiple safety barrier members, for example a number of safety members in the form of individual bars.
In the first and third examples described herein the sidewall members (15) and (83) have a substantially “L” shaped cross section. However it is envisaged that in an alternative embodiment the sidewall members could have a substantially “C” or “I” shaped cross 25 section.
As an option to the use of reinforcing mesh to create a safety barrier, a range of other barrier materials could be used, for example a section of metal grating material, or nylon webbing material, etc. The choice may be determined by how often persons may be expected to
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-102018100374 23 Oct 2019 stand on or near the opening, for example when carrying out installations during the construction of the building, and/or maintenance to services passing through the opening during the life of the building.
In the first example described herein, slots (29) are provided in the lower edge (27) of the 5 upper member (23). However, in an alternative configuration it is envisaged that the slots could be provided in an upper edge of the lower members (25), or in both the upper and lower members.
DEFINITIONS
Throughout 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.
ADVANTAGES
Thus it can be seen that at least the preferred form of the invention provides a formwork component for creating penetrations or openings in concrete floor structures which;
• provides safety from the moment that the opening is created, • can be permanently installed for safety throughout the life of the building, and • which can easily be cut or modified to allow pipework, ducting, wiring conduits etc.
to be installed when necessary during the construction process.
Claims (5)
1. A formwork component for creating penetrations or openings in concrete floor structures, the formwork component comprising a safety barrier and one or more sidewall members, the side wall members each having inner faces, and;
• the inner faces of the or each side wall member define an opening in a concrete floor structure, • the or each sidewall member is configured to prevent a wet concrete mix from entering the defined opening during the pouring of the concrete floor structure, • the safety barrier spans across the defined opening between opposing inner faces of the or each sidewall member, and • the or each sidewall member is configured to remain as a permanent edging of the defined opening after the concrete floor structure has cured;
and wherein the safety barrier extends beyond the or each sidewall member.
2. A formwork component as claimed in claim 1, wherein the safety barrier extends beyond the or each sidewall member to the extent that, when in use, the safety barrier becomes structurally embedded in the cast concrete floor structure in which the formwork component is installed.
3. A formwork component as claimed in claim 1 or claim 2, wherein the or each side
20 wall member is made in two parts, comprising an upper member and a lower member and the safety barrier comprises one or more safety members, and the or each safety member extends through the or each side wall member.
4. A formwork component as claimed in any one of claims 1 to 3, wherein the or each safety barrier is made from a section of mesh material.
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- 122018100374 23 Oct 2019
5. A building incorporating at least one at least one formwork component for creating penetrations or openings in concrete floor structures as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2018100374A AU2018100374B4 (en) | 2018-03-27 | 2018-03-27 | Formwork for Creating Penetrations or Openings in Concrete Floor Structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2018100374A AU2018100374B4 (en) | 2018-03-27 | 2018-03-27 | Formwork for Creating Penetrations or Openings in Concrete Floor Structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2018100374A4 AU2018100374A4 (en) | 2018-05-10 |
| AU2018100374B4 true AU2018100374B4 (en) | 2019-12-05 |
Family
ID=62089485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2018100374A Active AU2018100374B4 (en) | 2018-03-27 | 2018-03-27 | Formwork for Creating Penetrations or Openings in Concrete Floor Structures |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2018100374B4 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6786463B1 (en) * | 2001-04-10 | 2004-09-07 | Stephen Allan Collum | Telescoping form |
| EP2876231A1 (en) * | 2013-11-20 | 2015-05-27 | Accprobat | Reservation box for concrete walls or slabs |
| US20170067264A1 (en) * | 2015-09-09 | 2017-03-09 | Walk Safe Innovations, Llc | Rough-in box for creating penetrations in poured concrete flooring and method of use |
-
2018
- 2018-03-27 AU AU2018100374A patent/AU2018100374B4/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6786463B1 (en) * | 2001-04-10 | 2004-09-07 | Stephen Allan Collum | Telescoping form |
| EP2876231A1 (en) * | 2013-11-20 | 2015-05-27 | Accprobat | Reservation box for concrete walls or slabs |
| US20170067264A1 (en) * | 2015-09-09 | 2017-03-09 | Walk Safe Innovations, Llc | Rough-in box for creating penetrations in poured concrete flooring and method of use |
Non-Patent Citations (1)
| Title |
|---|
| "INDUSTRY GUIDE FOR FORMWORK, Construction Industry South Australia, June 2012". [https://www.safework.sa.gov.au/sites/default/files/formwork_guide.pdf viewed on the 6 August 2019] * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2018100374A4 (en) | 2018-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| PC | Assignment registered |
Owner name: MAX & WILS PTY. LTD. Free format text: FORMER OWNER(S): PANTANO INVESTMENTS PTY LTD |
|
| FF | Certified innovation patent | ||
| PC | Assignment registered |
Owner name: MASTERFORM SYSTEMS PTY LTD Free format text: FORMER OWNER(S): MAX & WILS PTY. LTD. |