AU711224B2 - Suspended flooring system and method for constructing same - Google Patents
Suspended flooring system and method for constructing same Download PDFInfo
- Publication number
- AU711224B2 AU711224B2 AU74258/96A AU7425896A AU711224B2 AU 711224 B2 AU711224 B2 AU 711224B2 AU 74258/96 A AU74258/96 A AU 74258/96A AU 7425896 A AU7425896 A AU 7425896A AU 711224 B2 AU711224 B2 AU 711224B2
- Authority
- AU
- Australia
- Prior art keywords
- concrete
- formwork
- support members
- structural support
- channel
- 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.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims description 25
- 238000009408 flooring Methods 0.000 title description 13
- 238000009415 formwork Methods 0.000 claims description 58
- 230000002787 reinforcement Effects 0.000 claims description 13
- 238000011065 in-situ storage Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000003466 anti-cipated effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Description
S F Ref: 360327
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
ORIGINAL
Name and Address of Applicant: Actual Inventor(s): Address for Service: Invention Title: UltraFloor Pty. Ltd.
6 Kyle Street Rutherford New South Wales 2320
AUSTRALIA
Douglas Gibson Irvine Spruson Ferguson, Patent Attorneys Level 33 St Martins Tower, 31 Market Street Sydney, New South Wales, 2000, Australia Suspended Flooring System and Method for Constructing Same ASSOCIATED PROVISIONAL APPLICATION DETAILS [31] Application No(s) [33] Country PN7259 AU [32] Application Date 21 December 1995 The following statement is a full description of this invention, including the best method of performing it known to me/us:- 5815
I
SUSPENDED FLOORING SYSTEM AND METHOD CONSTRUCTING SAME Field of the Invention The invention relates generally to the field of constructing suspended floors, and more particularly, to a system and associated method for constructing concrete suspended floors requiring less concrete, steel and associated formwork.
Background of the Invention In multi-level buildings, a given level typically includes a framework of vertical and horizontal supports and beams which will form the support for the next level. To construct the floor of the next level, concrete is typically poured into formworks which S".i :are held in place by the framework. This method generally requires that a large amount of concrete be poured so that the resulting floor is of sufficient thickness and strength. Furthermore, formworks are generally required throughout the entire span of the floor. Still further, this method also requires that many steel rebar or other reinforcement rods be incorporated into the poured concrete so that again, the resulting S floor is of sufficient strength.
25 Where the floor is to span any significant distance between the supports in the framework of the preceding level, the floor typically requires drop-down beams. These beams extend downward from the bottom of the floor to provide increased strength against bending moments and sagging.
A consequence of constructing such floors is that the large amounts of concrete and steel required results in high material costs. Furthermore, transportation and logistical difficulties may arise in delivering the materials to the floor site, especially where the floor is being constructed a considerable distance above the ground such as in a multilevel building.
A further consequence of constructing such floors is that a considerable distance is required between levels, distance between the ceiling of one level and the underside of the floor of the level immediately above. This results, in part, from the fact that the floor itself is relatively thick to meet strength requirements.
[N:\LIBHH100421 :EAB 2 However, the presence of drop down beams also blocks placement of services such as heating, ventilation and air conditioning ("HVAC") which are typically located between levels. Accordingly, the distance between levels is typically increased so that the services may be positioned below the bottoms of the drop down beams. Unfortunately, the space along the height of the drop down beams is typically wasted.
Yet a further consequence of the above-described floor is that because essentially the entire floor is originally supported by formwork, significant amounts of formwork must then be removed after the concrete has set. This removal process may itself take considerable time, but it also delays other construction work being performed on the floor below. This decreases construction efficiency and also increases the material required for formwork.
Accordingly, there is a need in the construction field for a floor which may be constructed with less materials, less formwork and which requires less distance between levels. To this end, a flooring system is needed where the floor itself is generally thinner, where drop down beams are avoided so that space is not wasted in locating services between levels, and where work on the floor below is not delayed. It is an object of the invention to provide an improved construction method and system in the context of the above.
This invention in one broad form provides a method for forming a floor, comprising the steps of: positioning a plurality of elongate concrete structural support members in a generally parallel arrangement in a horizontal plane on a framework or other *foundation, a.
positioning a plurality of infill formwork modules on said structural support members so as to span spaces between selected pairs of adjacent said structural support members, said infill formwork modules being positioned toward the top of said structural support members, positioning at least one removable support base formwork at or in proximity to the bottom of said structural members so as to span remaining spaces between non-selected pairs of adjacent said structural support members and to each define an elongate channel, positioning a plurality of elongate ducts in each said channel, said ducts forming passageways for post-tensioning cables, pouring concrete in situ into said support base formwork(s) and infill formwork modules to form a floor base with a band beam in each said channel, positioning post-tensioning cables in said ducts, and Y C \tensioning said post-tensioning cables.
[R:\LIBHH]00421 a.doc:GJG:TCW In the foregoing method, it is preferred that said channel(s) is/are arranged generally perpendicular to said elongate concrete structural support members, ends of respective concrete structural support members extending into said channel(s).
In the foregoing method, it is also preferred that the structural member ends are angled.
In the foregoing method, it is also preferred that said channel(s) is/are arranged generally parallel to said elongate concrete structural support members.
In the foregoing method, it is also preferred that said infill formwork modules are positioned on support means included in said structural members.
In the foregoing method, it is also preferred that said support base formwork is stripped away after said poured concrete has set.
In the foregoing method, it is also preferred that reinforcement is provided on said poured concrete.
*In the foregoing method, it is also preferred that additional concrete is poured on top of said reinforcement.
This invention in another broad form provides a floor system comprising: a plurality of elongate generally parallel concrete structural support members arranged in a horizontal plane on a framework or other foundation, a plurality of infill formwork modules spanning spaces between and supported by selected pairs of adjacent said structural support members, said infill 20 formwork modules being positioned toward the top of said structural support members, at least one removable support base formwork positioned at or in proximity to the bottom of said structural members and spanning remaining spaces between non-selected pairs of adjacent said structural support members so as to each define an elongate channel, a plurality of elongate ducts positioned in each said channel, concrete poured in situ into said support base formwork(s) and infill formwork modules to form a floor base with a band beam in each said channel, and post-tensioning cables positioned in said ducts and tensioned.
In the foregoing system, it is preferred that said channel(s) is/are arranged generally perpendicular to said elongate concrete structural support members, ends of respective concrete structural support members extending into said channel(s).
In the foregoing system, it is preferred that said structural support member ends are angled.
[R:\LIBHH]00421 a.doc:GJG:TCW 3a In the foregoing system, it is preferred that said channel(s) is/are arranged generally parallel to said elongate concrete structural support members.
In the foregoing system, it is preferred that said infill formwork modules are positioned on support means included in said structural members.
In the foregoing system, it is preferred that the floor system may further comprise reinforcement positioned on top of said concrete poured in situ into said support base formwork.
In the foregoing system, it is preferred that the floor system may further comprise additional concrete poured on top of said reinforcement.
Brief Description of the Figures A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings, wherein: 0. *0 a.
Figure la is a perspective view of a flooring system of the invention.
*69 Figure lb is a side section view of the flooring system of figure la.
15 Figure 2a is a perspective view of an alternate flooring system of the invention. 0 a.
Figure 2b is a side section view of the flooring system of figure 2a.
Figure 3a is a perspective view of an alternate flooring system of the invention.
Figure 3b is a side section view of the flooring system of figure 3a.
Figure 4a is a perspective view of an alternate flooring system of the invention.
Figure 4b is a side section view of the flooring system of figure 4a.
[N:\LIBHH]00421 :GJG:TCW
N
Description of the Preferred Embodiments The suspended floor of the current invention may generally rest on various types of support bases such as a foundation, the framework of the preceding level in a multilevel building or other types of support bases. Thus while the following description generally refers to a floor being constructed over the framework of a preceding level, the current invention is not limited for use in intermediate levels of multi-level buildings.
Generally, the flooring system of the current invention is preferably constructed by forming band beams, and then pouring concrete insitu thereover. A first embodiment of suspended floor 10 which includes band beams-20 is now described with reference to figures la and lb. Structural members 22 may be placed on the vertical supports or horizontal beams (not shown) of the supporting framework at a spacing suitable for the floor 10 being constructed. Structural members 22 may be positioned parallel to each S- other or in some other alignment to suit the architectural and structural design of the floor and building. As shown, the ends of structural members 22 may include angled ends 23 which may be cut at varying angles and which helps resist collapse in the event of an earthquake or other extreme vibration.
Structural members 22 preferably include support means 24 for supporting infill formwork modules 26. Support means 24 may comprise a ledge, but alternate configurations may be used such as lips, tongues or the like. Alternatively, structural members 22 may include laterally-protruding bolts or other support means for o 25 supporting infill formwork modules 26.
While resting on support means 24, infill formwork modules 26 generally extend the distance between adjacent structural members 22, and are preferably constructed so that they may withstand construction and design loads. As more clearly shown in figure lb, infill formwork module 26 may continue and extend downwards as shown by reference numeral 31, and may then protrude outward to form lip 32. Infill formwork module 26 need not be removed after the concrete has been poured.
Support base formwork 30 is generally positioned between the ends 23 of structural members 22, and is the receptacle for the concrete which is poured insitu to form band beams 20. Formwork 30 may comprise steel and/or wood or other materials suitable to receive concrete, and may be prepared beforehand so thatit may be positioned soon after structural members 22 and infill formwork modules 26 are in place. Because, support base formwork 30 is the only formwork removed after the concrete has set, a [N:',LIBHH!O04 2 1 :EAB significant reduction in formwork removal exists over current floors because here, formwork need only be removed where band beams 20 are constructed as opposed to the current case where an entire floor is supported by removable formwork.
Ducts 34 may then be positioned within support base formwork 30, and will serve to create passageways in the concrete through which post-tensioning cables (not shown) may pass. Ducts 34 may comprise metal tubes or other materials capable of withstanding concrete poured insitu. It is preferred that ducts 34 be positioned based on calculations considering floor span distance, anticipated loads and other variables.
Concrete 35 may then be poured insitu into support base formwork 30 thereby forming band beam 20. In this manner, the concrete will generalfy fill formwork 30, cover infill formwork modules 26 to a desired thickness, and surround ducts 34. It should be noted that the locations of band beams 20 in floor 10 will generally be calculated based on variables such as span distance, anticipated load and the like.
The pouredconcrete may also surround vertical support 12 and tie rods (not shown) protruding therefrom to add further stability. Vertical supports 12 may extend upwards thereby providing the framework for the next level(s). Band beams 20 may then be 20 formed on subsequent levels as described above.
Band beams 20 of varying length L may be formed, and the invention is not limited to ?band beams of the length suggested by the proportions in the figures. After the concrete has set, support base formwork 30 may be readily stripped away from band 2 5 beam 20. Cables 34 may also be passed through ducts 34 and placed under tension 0o..o. thereby compressing and post-tensioning band beam 20. Though figures la and lb show ducts in a crosswise fashion relative to band beam 20, additional ducts may be positioned along the length of band beam 20 to provide lengthwise post-tensioning as 5 well.
After band beam 20 has been formed, reinforcement 36 comprising a steel mesh or the like may be placed on band beam 20 to provide additional strength. Insitu concrete 37 may then be poured thereover to a desired thickness thereby creating suspended flcor A distinct advantage of suspended floor 10 is that it exhibits sufficient strength wiiout the use of drop down beams. As current drop down beams are typically between 600 mm and 900 mm in height, a distance of at least 1.5 meters is typically require-d between the ceiling of one level and the underside of the floor of the next level above.
LieB.- 21 Thus, suspended floor 10 provides a great space savings between levels in a multi level building. In a practical sense, more levels of a building may thus be constructed within a given height, thereby decreasing the cost per level. This saving is especially significant in relatively tall buildings. And furthermore, services such as HVAC may be easily located between levels because drop down beams are avoided.
Another benefit of floor 10 is that the construction of band beams 20 provides sufficient floor strength so that less concrete and steel are needed. Accordingly, the resulting floor 10 may be thinner with thicknesses of 170 mm to 250 mm being contemplated.
Thus less material is required which reduces material cost. Furthermore, less material such as concrete and steel need be transported to the floor location thereby providing a reduction in production costs and logistical problems. Still further, there is no need to transport prestressed beams to the worksite as band beams 20 are stressed upon being formed.
And as mentioned above, yet another benefit provided by suspended floor 10 is that the only formwork that is stripped away is support base formwork 30. This is in sharp contrast to stripping the significant amount of formwork spanning an entire floor as currently occurs. Accordingly, work on the level below floor 10 may commence soon 20 after band beams 20 have been poured, typically the day after.
Referring now to figures 2a and 2b, an alternate embodiment of suspended floor 10 is now described where like elements are described by like reference numerals. As shown, structural members 22 may include flat ends as opposed to angled ends 23 as in the first embodiment. Also this alternative, support base formwork 30 may be of increased depth to form a thicker and stronger band beam 20 which extends below the bottom of structural members 22. Such a band beam may be desired where increased distances are to be spanned between supporting framework components. In any event, drop down beams are again avoided.
Referring now to figures 3a and 3b, another alternate embodiment is described where ducts 32 are placed lengthwise along band beam 20. In this embodiment, support base formwork 30 may be held in place by clips 38. The width W of band beam 20 may be varied to suit design requirements.
Referring now to figures 4a and 4b, another alternate embodiment is described which includes reinforcement matrix 40. Matrix 40 may include rods 42 which may comprise steel or other suitable material. Rods 42 may also be bound together by stirrup 44.
Concrete may be poured in the same manner to form band beam 20. Reinforcement 36 [N:',LIBHH100421:EAB may be added followed by concrete 37 being poured to form floor 10. Thus the current invention may be used in connection with standard steel reinforcement.
It is to be realised that the current invention has been described by the foregoing embodiments. However, the current invention encompasses all modifications and variations that would be apparent to one skilled in the art. For example, the various variations shown in the figures may be combined to form embodiments not specifically discussed herein.
o* 'Nl: LBHH'; AB
Claims (17)
1. A method for forming a floor, comprising the steps of: positioning a plurality of elongate concrete structural support members in a generally parallel arrangement in a horizontal plane on a framework or other foundation, positioning a plurality of infill formwork modules on said structural support members so as to span spaces between selected pairs of adjacent said structural support members, said infill formwork modules being positioned toward the top of said structural support members, positioning at least one removable support base formwork at or in proximity to the bottom of said structural members so as to span remaining spaces between non-selected pairs of adjacent said structural support members and to each define an elongate channel, •positioning a plurality of elongate ducts in each said channel, said S: 15 ducts forming passageways for post-tensioning cables, 5 ~pouring concrete in situ into said support base formwork(s) and infill formwork modules to form a floor base with a band beam in each said channel, S.positioning post-tensioning cables in said ducts, and tensioning said post-tensioning cables. S 20
2. The method according to claim 1 wherein said channel(s) is/are arranged generally perpendicular to said elongate concrete structural support members, S: ends of respective concrete structural support members extending into said channel(s).
3. The method according to claim 2 wherein the structural member ends are angled.
4. The method according to claim 1 wherein said channel(s) is/are arranged generally parallel to said elongate concrete structural support members.
The method according to any one of claims 1 to 4 wherein said infill formwork modules are positioned on support means included in said structural members. [R:\LIBHH]00421 a.doc:GJG:TCW
6. The method according to any one of claims 1 to 5 wherein said support base formwork is stripped away after said poured concrete has set.
7. The method according to any one of claims 1 to 6 wherein reinforcement is provided on said poured concrete.
8. The method of claim 7 wherein additional concrete is poured on top of said reinforcement.
9. A floor system comprising: a plurality of elongate generally parallel concrete structural support members arranged in a horizontal plane on a framework or other foundation, 1o a plurality of infill formwork modules spanning spaces between and supported by selected pairs of adjacent said structural support members, said infill formwork modules being positioned toward the top of said structural support members, at least one removable support base formwork positioned at or in proximity to the bottom of said structural members and spanning remaining spaces 15 between non-selected pairs of adjacent said structural support members so as to each define an elongate channel, 9o°9 a plurality of elongate ducts positioned in each said channel, *"°:concrete poured in situ into said support base formwork(s) and infill formwork modules to form a floor base with a band beam in each said channel, and 20 post-tensioning cables positioned in said ducts and tensioned. 99 g
10 The floor system of claim 9 wherein said channel(s) is/are arranged generally perpendicular to said elongate concrete structural support members, ends of respective concrete structural support members extending into said channel(s).
11. The floor system of claim 10 wherein said structural support member ends are angled.
12. The floor system of claim 9 wherein said channel(s) is/are arranged generally parallel to said elongate concrete structural support members.
13. The floor system according to any one of claims 9 to 12 wherein said infill formwork modules are positioned on support means included in said structural ,o30 members. [R:\LIBHH]0042 1 a.doc:GJG:TCW
14. The floor system of any one of claims 9 to 13 further comprising reinforcement positioned on top of said concrete poured in situ into said support base formwork.
The floor system according to claim 14 further comprising additional concrete poured on top of said reinforcement.
16. A method for forming a floor substantially as hereinbefore described in relation to any one embodiment with reference to the accompanying drawings.
17. A floor system substantially as hereinbefore described in relation to any one embodiment with reference to the accompanying drawings. DATED this Third Day of May 1999 UltraFloor Pty Ltd Patent Attorneys for the Applicant SPRUSON FERGUSON NT [N:\LIBHH]00421:GJG
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU74258/96A AU711224B2 (en) | 1995-12-21 | 1996-12-10 | Suspended flooring system and method for constructing same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPN7259A AUPN725995A0 (en) | 1995-12-21 | 1995-12-21 | Suspended flooring system and method for constructing same |
| AUPN7259 | 1995-12-21 | ||
| AU74258/96A AU711224B2 (en) | 1995-12-21 | 1996-12-10 | Suspended flooring system and method for constructing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU7425896A AU7425896A (en) | 1997-06-26 |
| AU711224B2 true AU711224B2 (en) | 1999-10-07 |
Family
ID=25637588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU74258/96A Ceased AU711224B2 (en) | 1995-12-21 | 1996-12-10 | Suspended flooring system and method for constructing same |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU711224B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0049599A1 (en) * | 1980-10-02 | 1982-04-14 | George Herrick | Method and apparatus for forming an elevated concrete slab section of a building |
| WO1990001597A1 (en) * | 1988-08-02 | 1990-02-22 | Boekeler Hans Joerg | Set of angular building elements fitting into one another |
| WO1994011589A1 (en) * | 1992-11-14 | 1994-05-26 | Raymond Bettex | Wood/concrete composite floor |
-
1996
- 1996-12-10 AU AU74258/96A patent/AU711224B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0049599A1 (en) * | 1980-10-02 | 1982-04-14 | George Herrick | Method and apparatus for forming an elevated concrete slab section of a building |
| WO1990001597A1 (en) * | 1988-08-02 | 1990-02-22 | Boekeler Hans Joerg | Set of angular building elements fitting into one another |
| WO1994011589A1 (en) * | 1992-11-14 | 1994-05-26 | Raymond Bettex | Wood/concrete composite floor |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7425896A (en) | 1997-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6622452B2 (en) | Insulated concrete wall construction method and apparatus | |
| US7610733B2 (en) | Rapid steel frame assembly | |
| US6625943B1 (en) | Building interior construction system and method | |
| FI82520B (en) | PREFABRICATED MODULE FOR ANALYSIS WITH HUSBYGNAD. | |
| EP0823954B1 (en) | Improvements in or relating to reinforced concrete structural elements | |
| US12031329B2 (en) | Precast building panel | |
| CA2156488A1 (en) | Fiber-bale composite structural system and method | |
| HRP20051028A2 (en) | Constructing the large-span self-braced buildings of composite load-bearing wal-panels and floors | |
| KR20130113315A (en) | A building structure | |
| KR101850948B1 (en) | Eco-mold module and construction method of wooden building using the same | |
| WO2017219063A1 (en) | Method for constructing a concrete floor in a multistorey building | |
| EP0057697A1 (en) | Precast building element. | |
| JP3281461B2 (en) | Forming method of cylindrical prestressed concrete tank | |
| US20020092251A1 (en) | Insulated concrete wall construction method and apparatus | |
| CN215670408U (en) | Node connection structure of rib-outlet composite floor slab and cast-in-situ beam | |
| AU711224B2 (en) | Suspended flooring system and method for constructing same | |
| LU600833B1 (en) | Arched tunnel structure and arched tunnel construction method | |
| KR102197106B1 (en) | Slab unit implanted with means for pressing pile and the method for carrying out the construction of the steel column using it | |
| KR100264386B1 (en) | Method and construction of panel of reinforced siol using unartificial marble | |
| KR102409371B1 (en) | Rib-type PC slab having welded wire mesh with upper end hook and method for manufacturing and construction of the rib-type PC slab | |
| RU2453657C2 (en) | Design of foundation for structure or building and method of its manufacturing | |
| CN212388856U (en) | Cast-in-place clear water concrete batter post structure of prestressing force | |
| US5535562A (en) | Saddle anchorage and mounting method thereof | |
| CN116480054B (en) | Disassembly-free integrated floor support plate, floor structure and construction method of floor structure | |
| AU2021102058A4 (en) | A beam for forming a slab with a settable material and a system of forming a slab of a building with a settable material |