AU2015282351A1 - System to Provide Hobs at Edges of Concrete Building Slabs - Google Patents
System to Provide Hobs at Edges of Concrete Building Slabs Download PDFInfo
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- AU2015282351A1 AU2015282351A1 AU2015282351A AU2015282351A AU2015282351A1 AU 2015282351 A1 AU2015282351 A1 AU 2015282351A1 AU 2015282351 A AU2015282351 A AU 2015282351A AU 2015282351 A AU2015282351 A AU 2015282351A AU 2015282351 A1 AU2015282351 A1 AU 2015282351A1
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Abstract
A moulding system for the formation of sills or hobs on peripheral or effectively, peripheral parts of poured-in-situ concrete building slabs; said moulding system comprising an elongated box structure of suitable planform, more or less open at the 5 top and bottom and formed from two elongated side members maintained in a fixed, parallel positional relationship by suitable spacer members; the upper edges of said side members being folded inwardly through one or two 90 degree bends to increase their stiffness, the vertical height of the inner (nearest said slab) said side member being such as to cover the inner side of sill or hob with its lower edge embedded in 10 concrete building slab and the vertical height of the outer said side member being such as to cover the outer surfaces of said sill or hob and the end of said concrete slab, its lower edge being folded inwardly. Sheet 1 of 4
Description
SYSTEM TO PROVIDE HOBS AT EDGES OF CONCRETE BUILDING SLABS
This invention relates generally to the forming, as part of the building construction process, of sills or hobs on the peripheries of cast-in-situ concrete slabs or in areas of such slabs that are, effectively, peripheral. More particularly, it relates to moulds for the casting of such sills or hobs when they are made integrally with cast-in-situ concrete building slabs.
Particularly in the construction of multi-storey buildings, it is common to provide raised sills or hobs of some form to cast in-situ concrete slabs. Such hobs or sills may be employed to serve a variety of functions specific to the edges of cast in-situ concrete slabs. Discrete sills or hobs may be fixed to the surfaces of previously cast concrete building slabs or may be formed by casting concrete directly onto previously cast concrete building slabs. Where said sills or hobs are cast into place directly onto previously cast concrete building slabs, box moulds of appropriate dimensions and more or less open at the top and bottom are fixed to concrete slabs in appropriate positions, filled with concrete and the concrete allowed to cure. The fixing of discrete sills or hobs to the surfaces of previously cast concrete building slabs or the casting into place of sills or hobs directly onto cast in-situ concrete slabs is inefficient and time consuming, requiring the re-attendance of several building trades personnel to a building site to accurately measure up and fix said moulds in position and then to fill them with concrete. Additionally, irregularities in the trowelled surfaces of said cast in-situ concrete slabs may require the removal of concrete in order for said moulds to be set at the correct level. When it is considered that a multi-storey building may require several thousand lineal metres of such sills or hobs, the magnitude of the inefficiency and loss of time will be appreciated. Not only is the construction of formwork a time-consuming process requiring the services of skilled personnel but, after curing of the concrete in a sill or hob, the formwork must be stripped out and discarded, thereby incurring further expenditure of labour and loss of value.
In methods taught by Pantano in AU201127429 and AU2014213545, the fixing into position of sill or hob-forming moulds is integrated into the process of fixing in place steel reinforcing bar preliminary to the pouring of concrete slabs, and the process of filling said sill or hob moulds with concrete is integrated into the process of the in-situ casting of concrete building slabs. In this method, sill or hob moulds in the form of long boxes more or less open at the top and bottom are fixed into position during the process of installing reinforcing bar. Said moulds are supported from formwork upon a row of discrete chairs which may be of fixed height or adjustable. During casting of the parent concrete building slab, said moulds are simultaneously filled with concrete and trowelled off to a level surface, the concrete of the sill or hob so created thus being integral with that of said concrete building slab and thereby less prone to water infiltration; said sill or hob mould and said chairs being left in place in said concrete building slab after curing of said concrete.
Further, in another method taught by Pantano in AU2014904155, the fixing into position of sill or hob forming moulds is integrated into the process of fixing in place steel reinforcing bar preliminary to the pouring of concrete slabs, and the process of filling said sill or hob moulds with concrete is integrated into the process of the in-situ casting of concrete building slabs. In this method, said sill or hobs are made rebated such that ingress of water below a window or curtain wall supported on said sill or hob is positively prevented.
The object of the present invention is to provide a method of moulding sills or hobs on the peripheries of cast-in-situ concrete slabs or in areas of such slabs that are, effectively, peripheral. Said sills or hobs are made integrally with said concrete slabs and are employed for a variety of purposes.
According to the present invention, the fixing into position of moulds for the forming of peripheral sills or hobs on poured-in-situ concrete building slabs is integrated into the process of fixing in place steel reinforcing bar preliminary to the pouring of said concrete building slabs and the process of filling said sill or hob moulds with concrete is integrated into the process of the in-situ casting of concrete building slabs. In this method, sill or hob moulds in the form of box structures arranged in any suitable planform and more or less open at the top and bottom are fixed into position at the edges or other parts of formwork employed in the casting of a cast-in-situ concrete building slab. During casting of the concrete building slab, said moulds are simultaneously filled with concrete and trowelled off to a level surface, the concrete of the sill or hob so created thus being integral with that of said concrete building slab, said sill or hob mould being left in place in said concrete building slab after curing of said concrete. Said mould comprises two elongated side members of suitable dimensions maintained in a fixed, parallel positional relationship by suitable spacer means, said spacer means being joined to said side members in a variety of ways. Said side members are optionally folded to increase their stiffness. The vertical height of the inner said side member is restricted such that said side member covers the inner side of a said sill or hob with its lower edge embedded in said concrete building slab. The vertical height of the outer said side member is such that it covers the whole of the outer surface of said sill or hob and the end of said concrete slab, its lower edge being folded inwardly to better fix said lower edge to said concrete slab and to create a drip channel. During the making of said concrete building slab, said mould is temporarily braced from the outwardly-extended edge of said formwork and a temporary filler piece is inserted to define a drip channel. Said moulds are modified in a number of ways to provide said sills or hobs for a variety of applications.
The various aspects of the present invention will be more readily understood by reference to the following description of preferred embodiments given in relation to the accompanying drawings in which:
Figure 1 is a transverse cross-sectional view of a sill or hob mould secured in position at the edge of a concrete building slab, with formwork and temporary bracing shown in place;
Figure 2 is a transverse cross-sectional view of a sill or hob mould employed for the making of a balcony edge, formwork and temporary bracing having been removed;
Figure 3 is a transverse cross-sectional view of a sill or hob mould employed for making a flush edge to a concrete building slab for attachment purposes;
Figure 4 is a plan view of a balcony with a peripheral sill or hob made in accordance with the present invention;
Figure 5 is a transverse cross-sectional view of a penetration of a concrete building slab having a peripheral sill or hob made in accordance with the present invention;
Figure 6 is a transverse cross-sectional view of attachment means to be incorporated into a peripheral sill or hob;
Figure 7 is a plan view of the attachment means of Figure 6;
Figure 8 is a longitudinal cross-sectional view through a horizontal plane of plugs employed to close apertures in said sill or hob mould.
No significance should be inferred from the fact that the various figures are drawn to different scales. In the figures, the fastenings and/or weldings of said sill or hob mould side panels and said spacer means have been deleted for clarity of exposition.
With reference to Figure 1, the fixing into position of moulds for the forming of peripheral sills or hobs on poured-in-situ concrete building slabs is integrated into the process of fixing in place steel reinforcing bar preliminary to the pouring of said concrete building slabs and the process of filling said sill or hob moulds with concrete is integrated into the process of the in-situ casting of concrete building slabs. In this method, a sill or hob mould comprises an elongated box structure arranged in any suitable planform, said box structure being more or less open at the top and bottom and fixed into position at the edges of formwork employed in the casting of a cast-in-situ concrete building slab or in other parts that are, effectively, peripheral. During casting of the concrete building slab, said moulds are simultaneously filled with concrete and trowelled off to a level surface, the concrete of the sill or hob so created thus being integral with that of said concrete building slab, said sill or hob mould being left in place in said concrete building slab after curing of said concrete. Said mould comprises two elongated side members 1, 2 of suitable dimensions maintained in a fixed, parallel positional relationship by suitable spacer means 3, said spacer means being joined to said side members in a variety of ways. In the preferred embodiment, said spacer means take the form of a short length of tube of suitable cross-sectional shape welded to said side members. Said spacer means are optionally fixed to said side members with their longitudinal (flat) planes disposed at any angle between 90 and 45 degrees to the local floor of said mould. Said spacer means optionally take a variety of forms, including cruciform pieces, flat panels, square or rectangular sections, folded rod, folded sheet metal pieces, extruded sections or the like formed from any suitable, more or less rigid material, including metal alloys and polymer materials. In the preferred embodiment, the width (measured along the longitudinal axis of said mould) of said spacer means falls in the range 10 per cent to 25 percent of the transverse width of said mould, said spacer means providing minimal impediment to the flow of concrete into said mould and through said mould to said formwork below. The vertical heights of said side members determine the height of a said sill or hob above the finished surface of said concrete slab. Said side panels are optionally stiffened by ribbing or by the provision of reinforcement fixed to their inner surfaces. The cross-sectional shape of said mould above the finished surface of said concrete slab is optionally made asymmetric, with either said side panel being made curved, stepped, angled or otherwise shaped. Where the cross-sectional shape of said mould is made asymmetric, more than one type of said spacer means is optionally employed to join said side panels. Said spacer means are optionally fixed to said side members by hinged connections, by clipping, by welding, by soldering, by silver soldering, by bonding, by fastening using conventional form of screws or bolts, by pressure welding, or through the use of any other conventional joining means. The upper edges of said side members are optionally folded inwardly through one or two 90 degree bends 11, 12, 13, 14 to increase their stiffness. Said spacer means are optionally fixed to the inner surfaces of said side panels or to said folded-in upper edge parts of said side panels. The vertical height of the inner said side member 1 is restricted such that said side member covers the inner side of sill or hob 9 with its lower edge embedded in concrete building slab 4. The vertical height of the outer said side member 2 is such that it covers the whole of the outer surfaces of said sill or hob and the end of said concrete slab, its lower edge 5 being folded inwardly to better fix said lower edge to said concrete slab and to create a drip channel 6. During the making of said concrete building slab, said mould is temporarily braced from the outwardly-extended edge 7 of formwork 8 and a temporary filler piece 10 is inserted to define said drip channel. In the preferred embodiment, said temporary bracing takes the form of buttress panel 15 located at its lower edge by chocks 16 and located at its upper edge by props 17, fixed at their upper ends to said buttress panel and located at their lower ends by chocks 18. Said buttress panel, chocks, props and filler piece are preferably of wood, which is discarded when said formwork is stripped away. Until it is filled with concrete, said mould is secured in place against said buttress panel by means of a plurality of clips 19 passing transversely across said mould to engage the upper edges of said mould and said buttress panel. In the preferred embodiment, the width (in relation to the longitudinal axis of said mould) of said clips falls in the range 10 per cent to 25 percent of the transverse width of said mould, said clips providing minimal impediment to the flow of concrete into said mould. Where lengths of said mould are joined to make an extended length or to make a square or rectangular form, lengths of said mould are joined by doublings (not shown) fixed to adjacent inner end surfaces of said side panels.
With reference to Figure 2, said sill or hob is adapted to provide drainage of a balcony or similar structure. In this embodiment, mould for sill or hob 9 comprises inner side panel 1 and outer side panel 2 joined by spacer means 20 in the form of a short section of rectangular tube 20 fixed to panels 11,12 formed by folding the upper edges of said side panels inwardly through two 90 degree bends. A plurality of suitable apertures 23, 24 is provided in said side panels, drain pieces 21 passing through appropriately positioned said apertures being embedded in said concrete filling said sill or hob. In the preferred embodiment, said drain pieces are made by injection moulding of a polymer material, by die-casting of a metal alloy material, or by forming from a thin metal alloy material, such as stainless steel. To ensure positive drainage through said drain pieces, apertures 23,24 are preferably arranged such that a small fall exists through said drain pieces. Flanges 22 formed on the inner ends of said drain pieces abut the surface of inner side panel 1, thereby preventing excessive extension of said drain pieces from said sill or hob. Said drain pieces extend from said sill or hob for sufficient distance to carry any flow of water clear of said outer side panel.
With reference to Figure 3, a sill or hob is made with its upper surface coincident with the finished surface of concrete slab 4. In this embodiment, inner side panel 1 takes the form of a shallow folded section and inner and outer side panels 1, 2 are joined by spacer means 25 fixed to panels 11,12 formed by folding the upper edges of said side panels inwardly through two 90 degree bends. Bushes 26 having threaded bores are fixed to said spacer means and bolts (heads depicted as 27) passing through suitable apertures in structures to be fixed to said sill or hob are screwed and tightened into said threaded bores. In the embodiment depicted, said structure to be fixed to said sill or hob is a sun screen comprising fixing panel 28, louvre support arm 29 and louvres 30. A similar arrangement is optionally employed to fix the stanchions of a railing to a balcony edge. In the preferred embodiment, said spacer means are made long enough (in relation to the longitudinal axis of said mould) to accommodate two of bushes 26 in a side-by-side arrangement, thereby providing more positive fixing of a structure to said sill or hob.
With reference to Figure 4, a balcony is depicted incorporating the features of
Figures 2 and 3. In this embodiment, peripheral sill or hob 9 is formed around the edges of said balcony. The floor 32 of said balcony slopes to a central point at which is situated drain 33. Drain pieces 21 pass outwardly through said sill or hob and are situated at a level lower than that of doorstep 34 of a door giving access to said balcony such that, should drain 33 be blocked, water will flow out through said drain pieces and said door will not be flooded. A plurality of spacer means 25 incorporating threaded bushes (threaded bores depicted as 31) are provided for the attachment of the stanchions of a balcony.
With reference to Figure 5, a square or rectangularly-shaped sill or hob is provided around the edge of a penetration through a concrete building slab. Said sill or hob mould comprises outer side panel 1, inner side panel 2 joined by joining means 35. Said joining means 35 take the form of short lengths of shallow U-shaped section welded to the upper ends 13, 14 of said side panels which have been turned inwardly though 90 degrees. The sides 36, 37 of said joining means provide stiffness where structures are to be fixed to said joining means and, where necessary, said joining means are made from a heavier gauge material. The lower edge of said outer side panel is turned inwardly through 90 degrees to create attachment flange 40 which is fixed by suitable fastenings (typical positions depicted in broken line as 39) to formwork 8. Said square or rectangular form of said mould is created by welding together the ends of four suitable lengths of said mould or by joining them using 90 degree doublings fixed to the adjacent end, inner surfaces of said side panels. Obviously, said sill or hob may optionally be created in more complex geometrical shapes by joining together three, five or more lengths of said mould. Lengths of angle 41 are fixed to the outer surfaces of said outer side panels to support a grating 42. In alternative embodiments (not shown), suitable eyes are fixed to the outer surfaces of said outer side panels to support a ladder, winch support of other apparatus. In the preferred embodiment, the lower edges 38 of said inner side panels are turned through 90 degrees to increase their embedded strength in said concrete slab. During filling of said square or rectangularly-shaped sill or hob, the temporary bracing described in relation to Figure 1 is unnecessary and only the fixing of attachment panels 40 to said formwork is necessary. A suitable cover 43 is optionally provided to prevent the entry of precipitation to the area below said penetration of said concrete slab.
With reference to Figures 3, 4, 6, 7, U-shaped spacer pieces 25 have fixed to them one or more bushes 26 having threaded bores 31. Said spacer means are employed to fix together said side panels of said sill or hob in the manner described and said threaded bushes are employed to fix structures to said sill or hob.
With reference to Figure 8, apertures provided in said inner and outer side panels to accommodate drain pieces 21 (as described in relation to Figure 2) are closed by suitable plugs 45, 46. Said plugs optionally take the form of identical, discrete plugs frictionally located in said apertures or of pairs of plugs supported in said apertures by supporting means. In the preferred embodiment, said plugs are moulded from a suitable polymer material and said supporting means take the form of integrally-moulded, complementary, narrow lengths of polymer material of rectangular cross-sectional shape, the first of which having formed along its length a series of shallow, ratchet-type teeth, the second of which having formed on its distal end a housing 49 through an aperture of which said first length passes, a pawl within said housing permitting withdrawal of said first length from said housing, but blocking reverse movement. In use, said plugs are supplied with said first length fully entered into said housing. Said plugs are positioned in alignment with said apertures and are drawn apart until they are entered into said apertures. As said first length then cannot be retracted into said housing, said plugs are positively retained in place in said apertures. In an alternative embodiment (not shown), said plugs are joined by an integrally-moulded, sinusoidally-shaped length of stiffly flexible polymer material. Said plugs are inserted in said apertures by elastically compressing (reducing the length of) said sinusoidal form and are thereafter positively retained in place in said apertures by the elastic expansion of said sinusoidal form.
This invention should be taken to encompass any feasible combination of any one or more of the features described herein with any one or more other features described herein.
Claims (16)
1. A moulding system for the formation of sills or hobs on peripheral or effectively, peripheral parts of poured-in-situ concrete building slabs; said moulding system comprising an elongated box structure of suitable planform, more or less open at the top and bottom and formed from two elongated side members maintained in a fixed, parallel positional relationship by suitable spacer members; the upper edges of said side members being folded inwardly through one or two 90 degree bends to increase their stiffness, the vertical height of the inner (nearest said slab) said side member being such as to cover the inner side of sill or hob with its lower edge embedded in concrete building slab and the vertical height of the outer said side member being such as to cover the outer surfaces of said sill or hob and the end of said concrete slab, its lower edge being folded inwardly to facilitate fixing to formwork for creation of said concrete building slab and, where necessary, to create a drip channel; said box structure, where it does not have a closed planform, during the making of said concrete building slab is temporarily supported by a buttress panel located and braced from an outward extension of said formwork by suitable chocks and props; said box structure being secured to said buttress panel by a plurality of clips passing transversely across said box structure to engage the upper edges of said box structure and said buttress panel.
2. The moulding system of Claim 1 in which said spacer members take a variety of forms, including short lengths of tube of suitable cross-sectional shape, cruciform pieces, flat panels, square or rectangular sections, folded rod, folded sheet metal pieces and extruded sections or the like formed from any suitable, more or less rigid material, including metal alloys and polymer materials; said spacer members being fixed to the inner surfaces of said side members or to the inner surfaces of said folded-in upper edge parts of said side panels by hinged connections, by clipping, by welding, by soldering, by silver soldering, by bonding, by fastening using conventional form of screws or bolts, by pressure welding, or through the use of any other conventional joining means and disposed at any angle between 90 and 45 degrees with reference to the plane of said formwork.
3. The moulding system of Claim 1 in which the width (in relation to the longitudinal axis of said box structure) of said clips and said spacer members falls in the range 10 per cent to 25 percent of the transverse width of said box structure, said clips and said spacer members providing minimal impediment to the flow of concrete into said box structure and through said box structure to said formwork below.
4. The moulding system of Claim 1 in which said inwardly-folded lower edge of said outer side member is further formed to define a drip channel, said drip channel being temporarily filled by a wooden section of approximately triangular cross-sectional shape.
5. The moulding system of Claim 1 in which, where lengths of said box structure are joined to make an extended length or to create a closed planform, said lengths are joined by doublings fixed to adjacent inner end surfaces of said side panels.
6. The moulding system of Claim 1 in which said side panels are optionally stiffened by ribbing or by the provision of reinforcement fixed to their inner surfaces.
7. The moulding system of Claim 1 in which the transverse cross-sectional shape of said box structure above the finished surface of said concrete slab is made asymmetric, with either said side panel being made curved, stepped, angled or otherwise shaped, where necessary more than one type of said spacer means being employed to join said side panels.
8. The moulding system of Claim 1 in which installation of said box structure is integrated into the process of fixing in place steel reinforcing bar preliminary to the pouring of said concrete building slab, and the process of filling said box structure with concrete is integrated into the process of the in-situ casting of concrete building slab; the concrete of said peripheral sill or hob thus being integral with that of said concrete building slab, said box structure being left in place in said concrete building slab after curing of said concrete.
9. The moulding system of Claim 1 in which said sill or hob is adapted to provide drainage of a balcony or similar structure, said side panels being joined by spacer means in the form of short sections of rectangular tube fixed to their inwardly-folded, upper edges; a plurality of suitably-positioned apertures being provided in said side panels to accommodate tubular drain pieces passing transversely through said box structure with a small fall and being embedded in the concrete of said sill or hob; said drain pieces being made by injection moulding of a polymer material, by die-casting of a metal alloy material, or by forming from a thin metal alloy material; locating flanges formed on the inner ends of said drain pieces abutting the surface of said inner side panel, said drain pieces extending from said sill or hob for sufficient distance to carry any flow of water clear of said outer side panel.
10. The moulding system of Claim 1 in which a sill or hob is made with its upper surface coincident with the finished surface of concrete slab, said inner side panel being a shallow folded section and said outer side panel being of sufficient height to cover the depth of said concrete slab, said inwardly-folded, upper edges of said side panels being joined by spacer means; bushes being fixed to said spacer means such that structures may be fixed to said sill or hob by means of bolts screwed and tightened into threaded bores of said bushes, said spacer means being made sufficiently long (in relation to the longitudinal axis of said box structure) to accommodate two said bushes, thereby providing more positive fixing of said structures to said sill or hob; the lower edge of said outer side panel being turned inwardly through 90 degrees to facilitate fixing to said formwork, where required, said turned part incorporating a said drip channel.
11. The moulding system of Claim 1 in which the three sides of a balcony are provided with a peripheral sill or hob formed around its edges, said drain pieces passing outwardly through said sill or hob and situated at a lower level than that of an adjacent doorstep such that overflow drainage will flow out through said drain pieces without flooding said doorstep, a plurality of said spacer means incorporating said threaded bushes being provided for attachment of stanchions of a balcony railing.
12. The moulding system of Claim 1 in which a sill or hob of square or rectangular planform is provided around the edge of a penetration through a said concrete building slab, said box structure comprising said inner side member having a vertical height such as to cover the inner (nearest slab) side of sill or hob with its lower edge embedded in said concrete building slab and said outer side member, having a vertical height such as to cover the outer surfaces of said sill or hob and the end of said concrete slab, its lower edge being folded inwardly to facilitate fixing to said formwork for the creation of said concrete slab; the inwardly-turned, upper ends of said side panels being joined by short lengths of shallow U-shaped section welded to them; said square or rectangular form of said box structure being created by welding together the ends of four suitable lengths or by joining them using 90 degree doublings fixed to the adjacent end, inner surfaces of said side panels.
13. The moulding system of Claim 12 in which said sill or hob is created in more complex geometrical shapes by joining together three, five or more lengths of said box structure.
14. The moulding system of Claim 12 in which lengths of angle are fixed to the outer surfaces of said outer side panels to support a grating and suitable eyes are fixed to the outer surfaces of said outer side panels to support a ladder, winch support of other apparatus.
15. The moulding system of Claims 1 and 12 in which the lower edges of said inner side panels are turned through 90 degrees to increase their embedded strength in said concrete slab.
16. The moulding system of Claims 9 and 11 in which redundant apertures provided in said inner and outer side panels to accommodate said drain pieces are closed by plugs of a suitable polymer material, said plugs taking the form of identical, discrete plugs frictionally located in said apertures; or of pairs of plugs urged apart by supporting means in the form of integrally-moulded, straight, complementary, narrow lengths of polymer material of rectangular cross-sectional shape, the first of which having formed along its length a series of shallow, ratchet-type teeth, the second of which having formed on its distal end a housing through an aperture of which said first length passes, a pawl within said housing permitting withdrawal of said first length from said housing, but blocking reverse movement; or of pairs of said plugs joined by an integrally-moulded, sinusoidally-shaped length of stiffly flexible polymer material, said plugs being inserted into said apertures by elastically compressing said sinusoidal form, said plugs thereafter being positively retained in place by its elastic expansion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2015282351A AU2015282351A1 (en) | 2014-11-25 | 2015-12-23 | System to Provide Hobs at Edges of Concrete Building Slabs |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2014904809A AU2014904809A0 (en) | 2014-11-25 | System to Provide Hobs at Edges of Concrete Building Slabs | |
| AU2014904809 | 2014-11-25 | ||
| AU2015282351A AU2015282351A1 (en) | 2014-11-25 | 2015-12-23 | System to Provide Hobs at Edges of Concrete Building Slabs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2015282351A1 true AU2015282351A1 (en) | 2016-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2015282351A Abandoned AU2015282351A1 (en) | 2014-11-25 | 2015-12-23 | System to Provide Hobs at Edges of Concrete Building Slabs |
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| Country | Link |
|---|---|
| AU (1) | AU2015282351A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109740252A (en) * | 2018-12-30 | 2019-05-10 | 哈尔滨工业大学 | It is a kind of to evaluate concrete early freezc performance methodology using Analysis On The Transient Temperature |
-
2015
- 2015-12-23 AU AU2015282351A patent/AU2015282351A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109740252A (en) * | 2018-12-30 | 2019-05-10 | 哈尔滨工业大学 | It is a kind of to evaluate concrete early freezc performance methodology using Analysis On The Transient Temperature |
| CN109740252B (en) * | 2018-12-30 | 2022-05-06 | 哈尔滨工业大学 | Method for evaluating early-stage freezing performance of concrete by utilizing transient temperature field analysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NB | Applications allowed - extensions of time section 223(2) |
Free format text: THE TIME IN WHICH TO ASSOCIATE WITH A COMPLETE APPLICATION HAS BEEN EXTENDED TO 25 DEC 2015 . |
|
| PC1 | Assignment before grant (sect. 113) |
Owner name: MAX & WILS PTY. LTD. Free format text: FORMER APPLICANT(S): PANTANO INVESTMENTS PTY LTD |
|
| MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application |