WO2014059463A1 - Methods, systems and components for multi-storey building construction - Google Patents
Methods, systems and components for multi-storey building construction Download PDFInfo
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- WO2014059463A1 WO2014059463A1 PCT/AU2013/001103 AU2013001103W WO2014059463A1 WO 2014059463 A1 WO2014059463 A1 WO 2014059463A1 AU 2013001103 W AU2013001103 W AU 2013001103W WO 2014059463 A1 WO2014059463 A1 WO 2014059463A1
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- Prior art keywords
- lifting
- panel
- panels
- series
- structural
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B1/3511—Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B1/3516—Extraordinary methods of construction, e.g. lift-slab, jack-block characterised by erecting a vertical structure and then adding the floors from top to bottom
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/049—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres completely or partially of insulating material, e.g. cellular concrete or foamed plaster
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/142—Means in or on the elements for connecting same to handling apparatus
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/167—Tools or apparatus specially adapted for working-up plates, panels or slab shaped building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H1/00—Buildings or groups of buildings for dwelling or office purposes; General layout, e.g. modular co-ordination or staggered storeys
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/88—Curtain walls
- E04B2/90—Curtain walls comprising panels directly attached to the structure
- E04B2/94—Concrete panels
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2415—Brackets, gussets, joining plates
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2448—Connections between open section profiles
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2481—Details of wall panels
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2484—Details of floor panels or slabs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2496—Shear bracing therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/10—Load-carrying floor structures formed substantially of prefabricated units with metal beams or girders, e.g. with steel lattice girders
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2002/001—Mechanical features of panels
- E04C2002/002—Panels with integrated lifting means, e.g. with hoisting lugs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2002/001—Mechanical features of panels
- E04C2002/004—Panels with profiled edges, e.g. stepped, serrated
Definitions
- the present invention relates generally to building construction, and more specifically to methods, systems and components for multi-storey building construction.
- the invention has been developed primarily for use in connection with multilevel residential apartment buildings, retail shopping complexes, hotels, and the like and will be described predominantly in this context. It should be appreciated, however, that the invention is not limited to this particular field of use, being potentially applicable to a broad range of other building types including high-rise office blocks, schools, hospitals, security complexes and other forms of commercial and industrial complex such as factories, hangers and warehouses, as well as bridges, towers, tunnels, elevated walkways, airport infrastructure and other civil engineering developments. It should also be understood that although the invention is particularly well adapted for multi-level constructions, it may also be applied to single level structures.
- the floors defining each level of the building from reinforced concrete, which is cast in situ.
- the fabrication process for these concrete floors involves initial fabrication and installation of complex customised formwork and associated support props, systematic placement of reinforcing bars, and subsequent pumping of concrete into each section of formwork.
- the concrete must then be screeded, levelled and allowed to cure until self-supporting.
- the formwork and temporary support props must then be removed, following which subsequent floor levels are progressively constructed in succession, until the main building structure has been completed.
- internal and/or external wall sections are also formed from reinforced concrete cast in situ, floor by floor, in a similar manner.
- the invention provides a method of forming a building, comprising the steps of:
- the pre-fabricated structural panels are formed from a reinforced autoclaved aerated concrete (AAC) material.
- AAC autoclaved aerated concrete
- the method includes the further step of filling respective clearance spaces defined between adjacent edges of respective pairs of the adjoining structural panels with a compatible cementitious material, thereby to form a substantially continuous upper surface on the structural floor.
- the building is multi-storey and the vertical support structure extends for at least one level above the ground. In some embodiments, the vertical support structure extends for multiple levels above ground but may additionally or alternatively extend for multiple levels below ground.
- the support columns are formed at least predominantly from steel, in sections that are bolted, welded or otherwise fastened together either on site or as pre-fabricated structural sub-assemblies.
- the structural AAC panels preferably include internal longitudinally extending steel reinforcing elements.
- the structural panels are generally rectangular in configuration. However, it should be understood that a wide variety of other shapes and configurations of panels may be used, preferably tessellating configurations.
- the horizontal support beams are disposed in generally parallel relationship, at orientations and spacing intervals complementary with the orientation, size and strength of the structural panels to be supported.
- the panels are formed with complementary or partially complementary edge profiles, optionally including corresponding interlocking, abutting or interlinking edge formations.
- the adjoining edge profiles define complementary tongue and groove configurations.
- the edge profiles are adapted to define an upwardly opening or upwardly diverging generally V-shaped or U-shaped channel extending longitudinally between each pair of adjoining structural panels disposed in abutting side- by-side relationship.
- the channel may be defined by upwardly converging sidewalls.
- the method preferably includes the further steps of placing an elongate reinforcing bar longitudinally in the channel and subsequently filling the channel with the cementitious material, thereby to form a substantially continuous upper surface extending between the adjoining structural panels, while reinforcing the intermediate joints.
- the method includes the further step of fastening the structural panels to the underlying support beams in situ.
- the fastening step may involve one or more fastening techniques including gluing, screwing, bolting, nailing or securing with brackets or other mechanical anchoring or locating formations.
- a plurality of structural panels formed from autoclaved aerated concrete are oriented vertically and positioned side-by-side, in contiguous edge to edge relationship, to form one or more wall sections extending between or adjacent the structural columns.
- AAC autoclaved aerated concrete
- a sealing layer, primer, skim coat, render, textured surface layer, or combinations thereof may be applied over the entire exposed surface of the floor or wall, to provide a relatively uniform appearance as well as to provide particular aesthetic or performance characteristics that may be required, such as additional sealing or waterproofing, additional fire retardant properties, suitability for painting, sound installation or dispersion, surface grip, colour, texture or the like.
- suitable surface finishes include polymer-modified stucco or plaster, natural or manufactured stone, internal or external cladding including "Gyprock", timber panelling or fibre-cement sheeting, as appropriate.
- the method includes the step of forming the structural panels so as to include at least one lifting hole extending from a front or upper face to a rear or lower face of the panel.
- the lifting hole is preferably adapted releasably to receive a lifting eye, to facilitate crane lifting of the panel to the appropriate floor level in the building structure.
- lifting formations may be secured around the panels or to one or more faces of the panels, either as temporary or permanent fixtures.
- each panel includes a single centrally located lifting hole.
- each panel includes a pair of spaced apart lifting holes, ideally disposed generally symmetrically about a centreline or centre of gravity of the panel.
- three, four or more lifting holes may be provided, not all of which need necessarily be utilised in all lifting situations.
- prefabricated structural panels are additionally or alternatively positioned in substantially contiguous side-by-side relationship, preferably in a vertical orientation, on the horizontal support structure, to form a wall for the building. This method of wall construction may optionally be utilised in conjunction with more conventional floor construction techniques, and vice versa, if desired.
- the invention provides a building structure, formed substantially in accordance with the method previously defined, the structure including:- a series of vertically oriented support columns disposed in spaced apart relationship to define a generally vertical support structure;
- the prefabricated structural panels are additionally or alternatively positioned in contiguous side-by-side relationship on the support structure to form a wall.
- the structural panels are preferably formed from autoclaved aerated concrete (AAC).
- AAC autoclaved aerated concrete
- the respective clearance spaces defined between adjacent edges of the adjoining structural panels are preferably filled with a compatible cementitious material, thereby to form a substantially continuous upper surface on the structural floor.
- the building is multi-storey
- the vertical support structure is formed substantially from steel, extending for at least one level above the ground and in some embodiments for multiple levels above and/or below ground level.
- the invention provides a method of installing a section of floor or wall in a multi-storey building structure, the building structure including a series of vertically oriented support columns disposed in spaced apart relationship to define a generally vertical support structure, and a series of horizontally oriented support beams connected to the support columns in spaced apart relationship to define a generally horizontal support structure for an elevated floor, the method including the steps of:- providing a plurality of pre-fabricated structural panels;
- the prefabricated structural panel is formed from steel- reinforced, autoclaved aerated concrete (AAC).
- AAC autoclaved aerated concrete
- each of the lifting formations includes a generally circular lifting eye
- each lifting attachment preferably includes a shank portion adapted upon installation to extend through the lifting hole in the panel, to connect the associated lifting eyes.
- the lifting formation includes an eye-bolt having a head with an integral lifting eye and a complementary eye-nut incorporating an integral lifting eye, configured such that the shank of the eye-bolt is adapted in use to extend through the lifting hole in the panel for releasable engagement with the eye-nut on the opposite side of the panel.
- the lifting attachment preferably also includes a base plate with a mounting hole adapted to accommodate the shank of the eye-bolt, the base plate being adapted to be positioned between either the eye-bolt or the eye-nut and an outer face of the associated panel, to distribute load and reduce stress concentrations in the structural panel around the lifting hole.
- the base plate may be formed integrally with the eye-bolt and/or the eye-nut.
- each linking element includes a predetermined length of chain with a hook at each end, the hooks being adapted in use for releasable engagement with the respective mutually opposing lifting eyes on adjacent panels.
- the linking elements may take alternative forms, such as lengths of wire cable or rope, or bars, rods or the like formed from steel or other suitable structural or load-bearing materials.
- lifting holes and associated lifting attachments and linking elements may be used.
- the lifting holes will typically be distributed uniformly around the centreline or centre of gravity of the panels, and will be positioned to facilitate stable simultaneous lifting of all of the panels in the series.
- the series may comprise any number of panels, from two, up to five, six or potentially more.
- the upper limit will be governed by the weight of each panel and the load rating of the particular crane being deployed to hoist the panels, as well as the load ratings of the lifting attachments and linking elements.
- lighter panels are used, a larger number can be linked or ganged in each series and hoisted together in a single lifting operation.
- the invention provides a prefabricated structural building panel incorporating at least one lifting hole extending from a first face to a second face of the panel, adapted for use in conjunction with a plurality of complementary building panels to form a wall or floor in a building structure, in the method as previously defined.
- the invention provides a method of installing a wall section in a multi-storey building, the building including a series of vertically oriented support columns disposed in spaced apart relationship to define a generally vertical support structure, the method including the steps of:- providing a plurality of pre-fabricated structural panels, each including a lifting formation whereby the panel can be lifted;
- the structural panels are formed from steel-reinforced autoclaved aerated concrete (AAC).
- the rail formation is attached by a series of spaced apart removable connecting brackets, each in use extending from a respective support column to a corresponding position on the rail formation.
- the lifting formation includes at least one lifting hole extending from a front face to a rear face of each of the structural panels.
- the lifting formation also includes an eye-bolt having a head with an integral lifting eye, configured such that the shank of the eye-bolt is adapted to extend through the lifting hole for releasable engagement with a complementary nut and optionally a base plate on the opposite side of the panel.
- the panel engagement mechanism on the carriage assembly includes a wire rope, cable or chain terminating in a hook formation adapted for releasable engagement with the lifting eye on the panel.
- the rail formation takes the form of an I-beam comprising horizontally oriented upper and lower flanges and a vertically oriented interconnecting web.
- the carriage assembly preferably includes a rail traversing mechanism including guide wheels adapted for rolling engagement with the lower flange of the I-beam.
- the support brackets are preferably connected to the upper flange of the I-beam.
- the carriage assembly is motorised, incorporating a first drive mechanism adapted to drive the carriage on the rail, optionally by remote control.
- the carriage assembly includes a second drive mechanism adapted in use to progressively raise and lower the suspended panel via the engagement mechanism, again optionally by remote control.
- the second drive mechanism is connected with a winch, adapted to control the wire rope connected to the panel and hence to regulate the height of the panel.
- the second drive mechanism permits the panels to be raised or lowered by a distance corresponding to at least two floor levels, thereby permitting the same rail formation to facilitate the erection of wall sections on multiple levels of the building structure.
- the method also includes the steps of:- releasably interconnecting a plurality of the panels together as a series using a plurality of intermediate linking elements,
- the invention provides a crane carriage assembly as defined, adapted for use on a supporting rail formation connected to a building support structure, to facilitate positioning of prefabricated structural wall or floor panels, substantially in the manner previously described.
- the invention provides a pre-packaged kit of complementary component parts including prefabricated support columns, prefabricated support beams and prefabricated structural panels substantially as defined above, and adapted upon assembly in a predefined configuration, in accordance with instructions associated with the kit, to form a building structure.
- the assembly process for the kit utilises one or more of the methods or systems for building construction substantially as previously defined.
- the component parts are selected or designed, and optimally arranged, for compact "flat-packing" and efficient bulk transportation.
- This form of the invention being highly cost-effective and readily transportable, is particularly well adapted, inter-alia, for low-cost housing and other building infrastructure, in remote locations or developing countries.
- the invention consists in a prefabricated structural panel adapted to be supported in contiguous side-by-side relationship with a plurality of like panels to form a structural floor or wall between supporting frame elements in a building, each panel including at least one pre-formed lifting hole extending through the panel from one face to an opposing face, the lifting hole thereby providing a lifting formation to enable secure crane lifting of the panel and to enable inter-linking of multiple panels in series by means of the respective lifting holes to enable simultaneous lifting.
- the panels are formed substantially from AAC and the lifting holes are formed before the panels are autoclaved.
- panels include supplementary reinforcement within the in the AAC matrix in the vicinity of the lifting hole.
- the lifting hole may also be lined in some embodiments, for example by means of a tubular metal sleeve, for supplementary reinforcement.
- Figure 1 is a diagrammatic perspective view showing a multi-storey building structure formed in accordance with the present invention.
- Figure 2 is a plan view of the building structure from the perspective of arrow "A" in Figure 1 ;
- Figure 3 is an elevation view of the building structure from the perspective of arrow "B" in Figure 1 ;
- Figure 4 is an elevation view of a further building structure formed in accordance with the invention, showing below-ground basement levels and above- ground upper levels;
- Figure 5 is a plan view showing an upper level framing and floor panelling arrangement of the building structure shown in Figure 4;
- Figure 6 is an enlarged cross sectional side elevation view showing the flooring system of the building structure of Figures 4 and 5, in more detail;
- Figure 6A is a further enlarged cross-sectional detail taken from Figure 6;
- Figure 7 is a perspective view showing a section of flooring formed from contiguous AAC structural panels on a steel beam horizontal floor supporting structure, in accordance with the invention
- Figure 8 is a cross-sectional view taken along line A-A of Figure 7, showing a reinforcing bar supported in a channel defined between a pair of adjoining structural panels;
- Figure 9 is a side elevation view in the direction of line B-B of Figure 7, showing the reinforcing bar and surrounding grouting material in the channel defined between the adjoining structural panels;
- Figure 10 is a perspective view showing a structural panel formed from reinforced AAC, with a pair of spaced apart lifting attachments in accordance with the invention
- Figure 1 1 is an enlarged perspective view showing one of the lifting attachments of Figure 10, in more detail;
- Figure 12 is a perspective view of an alternative form of structural panel formed with a lifting hole, fitted with a lifting attachment, and connected to a crane hook in accordance with the invention
- Figure 13 is a perspective view showing two structural panels of the type shown in Figure 12, interconnected as a series by linking chains for simultaneous lifting in a single operation, in accordance with the invention
- Figure 14 is a perspective view similar Figure 13, showing a series of three of the structural panels interconnected for simultaneous lifting by crane in a single lifting operation;
- Figure 15 is a diagrammatic perspective view of a vertically oriented structural frame for a multi-storey building, incorporating temporary rail formations to facilitate positioning of structural wall panels, in accordance with one aspect of the invention
- Figure 15A is an enlarged perspective view showing region "A" of Figure 15 in more detail
- Figure 15B is an enlarged perspective view showing region "B" of Figure 15 in more detail
- Figure 15C is an enlarged perspective view showing region "C" of Figure 15 in more detail
- Figure 16 is an enlarged perspective view showing one of the rail formations and associated panel lifting elements from figure 15 in more detail, with the carriage assembly represented diagrammatically;
- Figure 17 is a further enlarged perspective view, showing the carriage assembly from Figures 15 and 16 in more detail;
- Figure 18 is a perspective view similar to figure 17, showing the lifting crane and carriage assembly used in conjunction with a dedicated lifting frame;
- Figures 18A to 18C are a series of enlarged perspective views showing various alternative embodiments of the dedicated lifting frame illustrated in figure 17, adapted for use respectively with complementary structural panels having different configurations of lifting holes;
- Figure 19 is a perspective view showing one level of a support structure according to a further embodiment of the invention, incorporating diagonal bracing elements and a modular support structure for a lift core.
- the invention in one aspect provides a multi-storey building structure 1 and an associated method of construction.
- the structure 1 includes a series of vertically oriented support columns 2 disposed in spaced apart relationship to define a generally vertical support structure 3.
- the support columns 2 are formed from structural steel I-beams, connected end-to-end as required by means of complementary steel connection brackets 4 and associated bolts.
- other structural materials, column configurations and interconnection methods may additionally or alternatively be used.
- a series of horizontally oriented floor support beams 5 are connected to the vertical support columns 2 in generally parallel spaced apart relationship, to define a horizontal support structure 6 for an elevated floor.
- the floor support beams 5 are preferably also formed from structural steel I-beams, bolted or welded to the respective vertical support columns 2, but again in other embodiments, alternative materials and connection methods may be used.
- the flooring itself is formed from a plurality of prefabricated structural panels 10, formed from a suitable lightweight autoclaved aerated concrete (AAC) formulation in a generally rectangular configuration.
- AAC autoclaved aerated concrete
- the AAC panels are pre-formed with internal steel reinforcing rods and hence can be used in structural applications. This material confers a number of important and unique characteristics and advantages, including reduced weight, adequate strength, good acoustic and thermal installation, fire resistance, durability (subject to appropriate finishing), ease of installation, and workability in situ.
- AAC is also resistant to water, rot, mould, mildew, insect infestation, and freeze/thaw degradation.
- the panels 10 are positioned in contiguous side-by-side relationship and anchored to the underlying horizontal support beams 5 to form an elevated structural floor 12.
- Anchoring of the panels 10 to the floor support beams 5 may be achieved using a variety of techniques including bolting, screwing, gluing, bracketing, locating pins, lugs, or the like.
- the panels are simply set into a layer of thin-bed mortar applied to the support beams.
- no internal anchoring or fixing to the floor support structure is required.
- the panel dimensions can vary significantly according to the intended application. Typically the panels will be 600 mm wide, although the panel width may vary from under 200 mm to over 1000 mm according to different applications and requirements.
- the panels are preferably around 200 mm thick, although thickness may vary from less than 100 mm to more than 300 mm, according to load constraints and performance requirements.
- the panels are preferably formed in lengths of 6 m, although length may range from less than 1 metre to 10 metres or more, as required.
- the panel density is typically around 800 kg/m3, but again the density may vary from less than 500 kg/m3 to more than 1 ,000 kg/m3, depending upon strength, porosity, durability, workability and other performance requirements.
- Compressive strength is preferably in the range of 2.0 to 8.0 Mpa, and ultimate tensile strength preferably in the range of 0.2 to 0.8 Mpa.
- a typical base formulation for a suitable AAC material includes quartz sand, lime, cement and water. Aluminium powder is also added, typically in the proportion of 0.05% to 0.08% by volume, as required according to the density specified for the finished product. During the production process, the aluminium powder reacts with calcium hydroxide and water to form hydrogen, which foams to substantially increase the volume of the mixture. The hydrogen eventually disperses, to be replaced by air. While the material is solid but still soft, it is removed from a cast or mould (with reinforcing rods embedded as required), and placed in an autoclave chamber, typically for 12 hours at a temperature of around 190°C and a pressure of 8 to 12 bar.
- the quartz sand reacts with calcium hydroxide to form calcium silica hydrate, which confers the requisite strength and other mechanical properties.
- the product is ready for use.
- up to 80% of the volume of an AAC block or panel can comprise air, and the weight per unit volume can be as little as 20% of that for conventional concrete.
- FIG. 4 to 6 Another building structure 1 is shown in Figures 4 to 6, wherein similar features are denoted by corresponding reference numerals.
- the structure includes several below-ground basement levels 15 and a plurality of above-ground upper levels 16.
- a foundation structure 17 including a peripheral basement shoring system is also shown.
- the basement levels 15 incorporate floor levels composed substantially from composite slabs, comprising wet-poured reinforced concrete over metal decking, formed in situ in accordance with conventional constructions techniques.
- the upper levels 16 incorporate lightweight structural flooring formed from AAC panels in accordance with the present invention.
- Figures 5 and 6 show the upper level framing and flooring system from the structure of Figure 4, in more detail.
- the structural panels 10 rest on the horizontal steel beams 5.
- the panel edges adjacent the wall are located and supported by a steel perimeter beam 20, which in turn is connected to the vertical support columns 2.
- An internal wall structure 22 is formed from lightweight steel framing members 23 and an internal cladding material (not shown).
- the external walls are formed from vertically oriented generally rectangular structural AAC wall panels 25, similar in configuration to the flooring panels and again disposed in contiguous side-by-side relationship, but typically thinner and lighter than the flooring panels.
- the structural flooring panels 10 and the preferred method of interconnection are shown in more detail in Figures 7 to 9.
- the panels are generally rectangular in configuration with complementary edge profiles, which may optionally include interlocking, overlapping or abutting elements such as tongue-and-groove formations adapted for inter-engagement when adjoining panels are disposed in contiguous side-by- side relationship.
- the abutting edge profiles are adapted in combination to define an upwardly depending generally V- shaped or U-shaped channel 30, extending longitudinally between each pair of adjoining panels.
- a reinforcing bar 32 is initially positioned to extend longitudinally through the associated channel 30.
- These reinforcing bars 32, or alternatively reinforcing cables, are initially supported by ring beams 35 (see Figure 8), or other suitable support structures, optionally including stands adapted for installation within the channels 30.
- the channels are filled with a compatible cementitious grouting material 36, which bonds to the aerated concrete material from which the panels are formed.
- the grouting material thereby forms a substantially continuous upper surface 37 extending between the adjoining structural panels, while securing the panels to one another and reinforcing the intermediate joints.
- Suitable joint filling materials include a variety of non-shrink grouts, mortar and concrete.
- the finished joint is best seen in Figure 9.
- the side walls of the U- shaped channels 30 converge upwardly to a marginal degree. This has the effect of mechanically keying the grouting material in place once it has set, thereby to provide additional integrity, stability and durability to the respective inter-panel joints.
- FIG. 6 In the building structures of Figures 1 and 4, a similar technique using AAC panels disposed in contiguous side-by-side relationship is used to form the main wall sections 38. As best seen in Figure 6, the wall panels 25 are primarily supported on horizontal flanges 39 extending outwardly from the perimeter beams 20, and are retained in place by suitable bolts, brackets, adhesives, lugs and/or other fastening means.
- various components of the building system may be compactly pre-packaged as discrete bundles of componentry in matched quantities and efficiently delivered to site as a kit, optionally with detailed assembly instructions in accordance with a pre-defined building plan.
- This form of the invention may be particularly advantageous for construction in isolated or remote locations, or in developing countries, where supplementary materials, resources or expertise on site may be limited.
- another implementation involves the construction of discrete building modules off-site, for example in a dedicated production facility.
- Such modules may comprise, for example, a series of vertical support columns, horizontal support beams and structural panels, partially or fully pre-assembled for delivery to site in a modular format.
- the modules in this context may comprise sections of floor or wall, entire rooms, a multiple of interconnected rooms, discrete sections of a structural core, or potentially even an entire level of a building structure, subject to size, weight, transportation and other logistical constraints.
- construction on site may be oriented primarily toward the interconnection and integration of a series of prefabricated structural modules, in accordance with a pre-defined building plan.
- each panel includes at least one lifting hole 40, extending from the upper face to the lower face of the panel.
- two such lifting holes are provided and these holes are disposed symmetrically about the centreline and centre of gravity of the panel, for well-balanced, stable lifting with the panels in a generally horizontal orientation.
- Each lifting hole 40 is adapted releaseably to receive a lifting formation 43, to facilitate secure crane lifting of the panel to the appropriate level and position in the building structure.
- the lifting formation 43 comprises a threaded eye-bolt 44 formed with a head incorporating a lifting eye 46, and a complementary eye-nut 47 which optionally incorporates a second lifting eye 46, permitting the panel to be lifted from either side.
- a base plate 50 is also optionally provided as part of the lifting formation, to minimise stress concentrations around the lifting hole, particularly during lifting operations.
- Base plates 50 may be provided on both sides of the panel, if required, and may optionally be permanently attached.
- the bolt shank extends right through the panel, for optimal safety and security during lifting operations.
- additional steel mesh or other suitable reinforcing materials may be incorporated into the panel in the vicinity of the lifting hole during the panel fabrication process, for enhanced structural integrity.
- Other lifting formations are also envisaged, such as external clamping mechanisms or brackets anchored to one or more faces of the panel, whereby through-holes and through-bolts are not necessarily required.
- each lifting attachment 43 in this case incorporates a pair of lifting eyes 46.
- One lifting eye is incorporated into the head of the eye-bolt as previously described and is accessible from the upper face of the panel, while the other lifting eye is incorporated into the eye-nut and is accessible from the lower face of the panel.
- the lifting eyes are interconnected directly by a load- bearing connecting element, in this case the shank of the lifting bolt, extending through the respective lifting hole.
- each linking element includes a predetermined length of chain 54 with a hook 55 at each end, the hooks being adapted for releasable engagement with the mutually opposing lifting eyes 46 on adjacent panels.
- the linking elements may take alternative forms, such as lengths of wire cable or rope, solid bars, rods or the like formed from steel or other suitable load bearing materials.
- each panel is connected to the next panel in the series by a pair of linking elements 53 disposed uniformly about the centreline of the respective panels.
- different numbers and configurations of linking elements may be used.
- only a single linking element is used between each pair of interlinked panels, whereas with heavier panels, three, four or more linking elements may be used, as required.
- the panels in each series may be interconnected in different orientations, including horizontally edge- to-edge, and vertically end-to-end.
- the first panel in the series is connected to a crane hook 58 by means of the lifting eye or eyes on the upper face of the first panel.
- the process then involves the step of lifting the first panel via the crane hook and thereby hoisting the subsequent interconnected panels in the series to a height on the support structure corresponding generally the floor level where the panels are required. In this way, all of the panels in the series are elevated substantially simultaneously, in a single crane lifting operation. It should also be appreciated that multiple series of panels may be lifted simultaneously in a single operation.
- the linking chains 54 are released from the lifting eyes 46 and the eye-bolts and nuts are removed from the panels.
- the panels are then manually positioned in contiguous side-by-side relationship on the horizontal support structure, to form the basis for a corresponding section of the elevated floor.
- the invention provides a method and system for installing a wall section in the building structure, again preferably utilizing structural panels formed from steel-reinforced AAC or other suitable materials. This system and method will typically be deployed once the wall panels 25 have been lifted to the appropriate floor level in series or groups using the panel linking method previously described. However, it may also be adapted to lift the wall panels directly from the ground, if required.
- a rail formation 63 which in this embodiment takes the form of an I-beam having an upper flange 64 and a lower flange 65, is initially secured to the building frame or support structure in a generally horizontal orientation above the intended location for the wall section to be constructed. This is done by means of a series of spaced apart removable connecting brackets 66.
- each of the connecting brackets 65 extends from a respective vertical support column 2 to a corresponding position on the upper flange of 64 of the I- beam rail.
- Each of the panels is fitted with a lifting formation 43, preferably in the form of an eye-bolt 44 extending through a pre-formed lifting hole, in the manner previously described in relation to the AAC floor panels.
- the lifting hole is ideally positioned toward the upper end of the panel, so as to facilitate lifting of the panel in the vertical orientation in which it will be positioned in the building structure.
- a remote controlled electrically operable lifting crane carriage assembly 70 is then attached to the lower flange 65 of the guide rail, whereby the carriage is adapted to securely traverse the rail on guide wheels 72.
- the carriage 70 includes a panel engagement mechanism, preferably in the form of a wire rope 74 terminating in a hook 75 adapted for releasable engagement with the lifting eye 46 on the wall panel.
- the crane carriage 70 incorporates a first drive motor 80 adapted to drive the carriage on the rail via wheels 72 in response to remote control inputs from the operator.
- a second drive motor 82 is connected to a winch mechanism 83, adapted progressively to raise or lower the suspended panel via the wire rope 74 connected to the panel, again by remote control.
- the carriage supporting a wall panel is able to traverse the rail to a position directly above the intended location for the panel, and then lower the panel into position in the wall section under construction using the motorised winch mechanism 83, by remote control.
- the winch mechanism 83 incorporates sufficient cable to permit the panels to be raised or lowered by a distance corresponding to at least two floor levels, thereby permitting the same rail formation to facilitate the erection of wall sections on multiple levels of the building structure. This is indicated in the arrangement of Figure 15, in which each guide rail effectively services three floor levels below it. Advantageously, this minimises the number of rails required.
- longer wall panels may be used, such that a single vertically oriented panel may span two or more floor levels.
- a single 12 metre panel can be used to span four floor levels of a multi-storey building structure.
- multiple lifting holes may be provided for improved load distribution within the panel during the lifting operation.
- This panel configuration and installation method not only greatly reduces time required to place the wall panels in position, it also substantially reduces (potentially by several multiples) the number of inter-panel joints required. This produces a cleaner overall aesthetic result, and also minimises the extent of costly labour input at the panel joints, associated with finishing processes, sealing and the like. It should also be appreciated that this method and apparatus may be used for elevating the floor panels to the required levels.
- the rails 63 are intended to be removed once the walls have been constructed.
- the rails may be formed integrally with the framing structure and/or as permanent features of the building.
- the rails may be architecturally integrated into the overall building aesthetics, and/or may be adapted for other functional purposes such as supports external window cleaning or maintenance equipment once the building has been completed.
- multiple wall panels may be interlinked or interconnected using a series of intermediate linking elements such as chains or wire ropes, in essentially the same manner as previously described in relation to the floor panels, whereby multiple panels in the series can be efficiently positioned in rapid succession, by means of the crane carriage assembly system.
- a series of intermediate linking elements such as chains or wire ropes
- FIG. 18 shows a crane carriage 70 in the same configuration as shown in Figure 17.
- the wire rope 74 is connected to the structural wall panel 25 by means of a dedicated lifting frame 85.
- the lifting frame is substantially symmetrical, including a pair of lifting arms 86 adapted in use to extend downwardly from an upper bridge section 87 along opposite faces of the panel to the associated lifting hole 40.
- the length of the bridge section 87 corresponds approximately to the thickness of the panel.
- a lifting lug 88 extends upwardly from the bridge section 87 and includes a lifting hole 89 adapted for engagement by a corresponding fitting such as a crane hook securely mounted to the end of the wire rope.
- a lifting bolt 90 is inserted so as, in use, to extend through corresponding aligned holes 91 in the respective lifting arms 86, and also through the aligned lifting hole 40 in the panel.
- the bolt is adapted for engagement with a corresponding nut 92, which in this case is welded to the respective lifting arm. It will be appreciated that the symmetrical configuration of the lifting frame permits safe and secure lifting of the panel, in a stable vertical orientation, with minimal risk of damage to the panel by the lifting apparatus. Once the panel has been securely lifted into position on the required level of the building structure, the lifting frame is removed and lowered to ground level for reuse on subsequent panels.
- FIGS 18A to 18C show a series of alternative configurations of the lifting frame 85. These frames have different configurations of lifting arms 86 (including horizontally and vertically oriented arms) and associated lifting holes 91 , to accommodate panels with various different configurations of lifting holes.
- FIG. 19 Another embodiment of the invention is shown in Figure 19, wherein again similar features are denoted by corresponding reference numerals.
- This figure shows one level of a steel framing and support structure 3, which would typically comprise multiple levels of similar layout.
- the structure includes a series of vertically oriented support columns 2 interconnected as a matrix with horizontally oriented floor support beams 5.
- the support structure also includes a diagonal bracing members 95 to provide enhanced structural integrity and lateral stability.
- the support structure of this embodiment includes a structural elevator core 97, also formed predominantly from steel.
- the lift core is preferably formed from a plurality of structural steel core modules 98 stacked and secured one above the other, with the height of each module corresponding to the height of the respective level in the structure.
- the lift core modules 98 also include diagonal bracing members 95, for enhanced strength and stability.
- these core modules can be fabricated off-site if desired, and installed very rapidly on-site exactly when required in the project management schedule.
- the modular lift core 97 forms an integral part of the steel support structure.
- the outer walls can then be completed with structural panels 10 of the type previously described, or by other suitable materials, including nonstructural materials.
- Further cladding layers may also be provided if needed, for example to provide appropriate levels of acoustic insulation, fire rating performance, and the like.
- this avoids the need for costly, time-consuming and labour-intensive formwork and wet pouring of concrete on-site, as is usually required for structural elevator cores in conventional high-rise building construction.
- the invention in its various aspects and preferred embodiments provides a number of advantages. By avoiding the need to construct each floor level from concrete formed and poured in situ, there is a significant reduction in the number of individual workmen and different trades required on-site, which reduces cost and planning complexity while substantially improving safety.
- a typical medium-rise building project using conventional techniques would usually require around 80 to 100 workers on site at any given time during construction of the primary structural framing and flooring, with all of the cost, scheduling complexity and safety risks that this inherently entails.
- a comparable building project optimised and constructed in accordance with preferred aspects of the present invention may typically only require 8 to 10 workers spanning significantly fewer trades on site at any given time, during the corresponding construction phase.
- a further benefit of the invention in its preferred aspects is the significant reduction in weight achievable through the use of AAC structural panels, which produce flooring or walling that is substantially lighter than an equivalent area of conventional reinforced concrete. This in turn allows the use of lighter steel framing and/or alternative supporting structures, which contributes to further cost savings, in terms of both material utilisation and construction time.
- Substantially lighter steel and AAC concrete building structures are also inherently more resistant to earthquake damage, which represents an additional cost saving dimension and a further safety feature.
- the lightweight nature of the building structure also readily lends itself to the construction of additional levels or other extensions on top of existing building structures. Such structures may otherwise need to be completely demolished in order to create additional height or additional storeys using conventional techniques, as a result of the associated additional weight. Construction of additions and extensions based on the methods and systems described herein, using an existing building and other structure as a foundation or base, should be understood to fall within the scope of the invention.
- the invention in its preferred forms offers a more environmentally friendly solution to building construction by requiring less material, less energy, less time, fewer crane lifts and fewer people on site, thereby creating a substantially lower carbon footprint as compared with conventional building construction techniques.
- a related advantage stems from the requirement for relatively fewer deliveries of construction materials to building sites, and reduced levels of waste materials requiring removal, leading in turn to reduced traffic congestion and road blockages caused by delivery trucks, concrete mixers, cranes and the like.
- concentration of the prefabrication processes in dedicated factories allows for improved utilisation of public transport infrastructure by workers, again helping to minimise traffic congestion and associated environmental impacts.
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- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
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- Conveying And Assembling Of Building Elements In Situ (AREA)
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Abstract
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Priority Applications (15)
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AU2013332245A AU2013332245A1 (en) | 2012-10-18 | 2013-09-27 | Methods, systems and components for multi-storey building construction |
CA2888614A CA2888614A1 (en) | 2012-10-18 | 2013-09-27 | Methods, systems and components for multi-storey building construction |
SG11201503040PA SG11201503040PA (en) | 2012-10-18 | 2013-09-27 | Methods, systems and components for multi-storey building construction |
US14/436,858 US20150308096A1 (en) | 2012-10-18 | 2013-09-27 | Methods, systems and components for multi-storey building construction |
NZ708000A NZ708000A (en) | 2012-10-18 | 2013-09-27 | Methods, systems and components for multi-storey building construction |
JP2015537079A JP2015536391A (en) | 2012-10-18 | 2013-09-27 | Multilayer building structure methods, systems and components |
EA201590754A EA201590754A1 (en) | 2012-10-18 | 2013-09-27 | METHODS, SYSTEMS AND COMPONENTS FOR CONSTRUCTION OF MULTILEVEL BUILDINGS |
CN201380066522.5A CN104884714A (en) | 2012-10-18 | 2013-09-27 | Methods, systems and components for multi-storey building construction |
EP13847728.6A EP2909387A4 (en) | 2012-10-18 | 2013-09-27 | Methods, systems and components for multi-storey building construction |
MA38094A MA38094A1 (en) | 2012-10-18 | 2013-09-27 | Processes, systems and components for multi-storey building construction |
PH12015500868A PH12015500868A1 (en) | 2012-10-18 | 2015-04-17 | Methods, systems and components for multi-storey building construction |
ZA2015/02826A ZA201502826B (en) | 2012-10-18 | 2015-04-24 | Methods, systems and components for multi-storey building construction |
HK16102181.7A HK1214322A1 (en) | 2012-10-18 | 2016-02-25 | Methods, systems and components for multi-storey building construction |
AU2018202096A AU2018202096A1 (en) | 2012-10-18 | 2018-03-23 | Methods, systems and components for multi-storey building construction |
AU2020200977A AU2020200977B2 (en) | 2012-10-18 | 2020-02-11 | Methods, systems and components for multi-storey building construction |
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CN104176632A (en) * | 2014-07-24 | 2014-12-03 | 中国十九冶集团有限公司 | Method for installing suspension beam and method for constructing building structure equipped with suspension beam |
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SG11201503040PA (en) | 2015-05-28 |
JP2015536391A (en) | 2015-12-21 |
ZA201502826B (en) | 2016-01-27 |
EA201590754A1 (en) | 2015-11-30 |
EP2909387A4 (en) | 2016-11-23 |
PH12015500868A1 (en) | 2015-06-22 |
AU2013101343A4 (en) | 2013-11-07 |
CN104884714A (en) | 2015-09-02 |
NZ708000A (en) | 2018-01-26 |
US20150308096A1 (en) | 2015-10-29 |
AU2020200977B2 (en) | 2021-12-23 |
AU2018202096A1 (en) | 2018-04-19 |
MA38094A1 (en) | 2016-04-29 |
HK1214322A1 (en) | 2016-07-22 |
AU2013101343B4 (en) | 2014-06-26 |
AU2020200977A1 (en) | 2020-02-27 |
SG10201703171UA (en) | 2017-06-29 |
AP2015008451A0 (en) | 2015-05-31 |
CA2888614A1 (en) | 2014-04-24 |
AU2013332245A1 (en) | 2015-05-28 |
EP2909387A1 (en) | 2015-08-26 |
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