WO2016161478A1 - Coffrage à poutrelles permanentes pour structures en béton - Google Patents

Coffrage à poutrelles permanentes pour structures en béton Download PDF

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Publication number
WO2016161478A1
WO2016161478A1 PCT/AU2016/050254 AU2016050254W WO2016161478A1 WO 2016161478 A1 WO2016161478 A1 WO 2016161478A1 AU 2016050254 W AU2016050254 W AU 2016050254W WO 2016161478 A1 WO2016161478 A1 WO 2016161478A1
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WO
WIPO (PCT)
Prior art keywords
beam formwork
formwork
side walls
end flanges
formworks
Prior art date
Application number
PCT/AU2016/050254
Other languages
English (en)
Inventor
Craig Chalk
Original Assignee
Red Dingo Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2015901245A external-priority patent/AU2015901245A0/en
Application filed by Red Dingo Gmbh filed Critical Red Dingo Gmbh
Publication of WO2016161478A1 publication Critical patent/WO2016161478A1/fr

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Classifications

    • 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
    • E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
    • E04B1/161—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material with vertical and horizontal slabs, both being partially cast in situ
    • 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
    • E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • 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
    • E04B1/003—Balconies; Decks
    • 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
    • E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
    • E04B1/165—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material with elongated load-supporting parts, cast in situ
    • 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
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
    • E04B5/40—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs
    • 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
    • E04B5/48—Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/30—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by edge details of the ceiling; e.g. securing to an adjacent wall
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E04C3/205—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members with apertured web, e.g. frameworks, trusses
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings

Definitions

  • the present invention relates to a stay-in-place beam formwork for suspended concrete slabs and concrete beams.
  • Some formwork is referred to as 'stay-in-place'. This means that the formwork is not removed, it remains in position after the concrete is poured, forming part of the completed structure.
  • Stay-in-place formwork is typically brought on site, positioned and then filled with concrete.
  • stay-in-place formwork is concealed behind other materials, e.g. cladding; in other uses it provides a suitable facing for the finished construction.
  • Concrete structures also require specific structural elements, particularly to support loads which require additional support to manage a span.
  • a conventional approach is to provide a steel structural member for this purpose. These are relatively heavy to transport and fit. It is also known to provide concrete structural members using custom timber formwork.
  • the present invention seeks to overcome or substantially ameliorate at least some of the deficiencies of the prior art, or to at least provide an alternative.
  • the present invention provides a beam formwork for forming a structural component, the beam formwork comprising a generally elongated body defining a channel having an open top for receiving concrete in use, the body comprising end connection flanges at ends thereof.
  • the bean formwork comprises a base wall and two side walls extending generally upwardly from opposite longitudinal edges of the base wall, the base wall and the side walls defining the channel having an open top and open ends.
  • seats are formed along top edges of the side walls for receiving edges of decking plates thereon.
  • the seats are formed by L-shaped top edges of the side walls.
  • the end flanges extend from ends of the side walls, the end flanges being directed outwardly sideways to be perpendicular to the side walls.
  • flange attachment apertures are formed along the end flanges and spaced bracket attachment apertures are formed along lower edges of the side walls.
  • the end flanges extend from ends of the side walls, the end flanges being directed inwardly sideways towards each other, the beam formwork further comprising end plates for attachment to the end flanges to close the open ends.
  • the end flanges extend from ends of the side walls, the end flanges being directed inwardly sideways towards each other, the end flanges meeting or overlapping to close the open ends.
  • the beam formwork further comprises a spacer bracket for maintaining the distance between the side walls.
  • the beam formwork further comprises a ceiling connector bracket, the ceiling connector bracket being an elongated right angle element having a vertical web for connection to the side wall and a horizontal web to which a ceiling panel can be mounted.
  • the ceiling connector bracket being an elongated right angle element having a vertical web for connection to the side wall and a horizontal web to which a ceiling panel can be mounted.
  • the beam formwork is a roll formed metal beam and the end flanges are creased in factory and folded out on site.
  • end flanges are formed as a separate unit and attached by fasteners or a mechanical interlock to the side walls and/or base wall.
  • pre-formed cutouts are formed in the side wall for creating an aperture therein for reinforcement bars and concrete to extend through.
  • pre-formed apertures are formed in the side wall for void formers to be insertable therethrough.
  • the beam formwork further comprises at least one insulation element in the channel.
  • the insulation element only partly fills the channel.
  • the beam formwork further comprises a plurality of spaced insulation elements mounted to a carrier, the carrier and the insulation elements being disposed in the channel.
  • the present invention also provides a structure comprising at least one beam formwork of the above, wherein the end flanges of the beam formwork are attached to another component.
  • the structure comprises a first beam formwork attached to a second beam formwork in a T-junction, the end flange of the first beam formwork attached to the side wall of the second beam formwork.
  • the structure comprises a plurality of the first beam formworks attached to the second beam formwork, the first beam formworks disposed spaced and parallel to each other.
  • the structure further comprises decking plates extending between adjacent beam formworks.
  • the structure comprises a plurality of beam formworks attached to the component, the beam formworks disposed spaced and parallel to each other.
  • the component is a hollow wall, the hollow wall having a panel at which a cutout is formed to receive an end section of the beam formwork, wherein the end flanges are attached to internal surfaces of the panel.
  • the structure further comprises a decking hanger assembly, the decking hanger assembly comprising hangers suspended from the sides of two facing beam formworks, and a deck panel placed on the lower end of the hangers.
  • the component is a formwork board for forming the edge of a slab.
  • the present invention provides a formed metal structural section with flanges projecting from the ends, so that the section can be readily affixed to other components, the section being filled with concrete on site and remaining in the structure.
  • the present invention provides a structural element, including a body formed from metal, one or more channels in the body adapted to be operatively filled with concrete, and flanges projecting from the body at either end, the flanges being adapted to connect to other structural components.
  • relatively lightweight, pre-formed metal components can be positioned as required in the structure, and filled with concrete, so that the structural element acts as formwork, and gains additional strength from the concrete. Additional reinforcement steel or other materials may be provided within the concrete as required. Pre or post stressing may also be used.
  • the present invention provides a method of providing a load bearing element for a structure, including the steps of providing a pre-formed metal body including one or more channels and flanges on either end, placing the body in the required position in the structure, optionally placing additional reinforcement within the channel, and filling each channel with concrete, so as to form a load bearing element when the concrete has set.
  • the flanges are inserted within the outer sheet of a wall section of stay-in-place formwork.
  • the open channel at the end of the metal body allows for a continuous concrete structure with the wall. In suitable implementations, this allows for the whole structure so formed to be poured with concrete at one time
  • Figure 1 shows (a) perspective view and (b) end view of a beam formwork according to a preferred embodiment
  • Figure 2 shows (a) perspective view and (b) top view of a plurality of the beam formworks of Figure 1 attached in spaced parallel manner to one side of a larger dimension beam formwork;
  • Figure 3 shows (a) perspective view and (b) top view of a plurality of the beam formworks of Figure 1 attached in spaced parallel manner to opposite sides of a larger dimension beam formwork;
  • Figure 4 shows (a) top view, (b) end view and (c) perspective view of a beam formwork of Figure 1 attached to another beam formwork in a T junction;
  • Figure 5 is a perspective view of an example building comprising hollow walls with beam formworks extending between and connecting top sections of the hollow walls;
  • Figure 6 shows (a) perspective view and (b) exploded perspective view of an alternative method of attaching the beam formwork to a wall panel;
  • Figure 7 is a perspective view of a method of forming a suspended floor slab above a wall using the beam formwork
  • Figure 8 shows (a) perspective view and (b) exploded perspective view of a beam formwork configured as a stand-alone structural element
  • Figure 9 shows (a) perspective view and (b) exploded perspective view of a beam formwork with a spreader bracket
  • Figure 10 shows (a) perspective view of a ceiling connector bracket, (b) perspective view of the use of ceiling connector brackets attached to beam formworks for attaching a ceiling panel thereto and (c) is an exploded view of (b);
  • Figure 1 1 shows (a) first sectional perspective view, (b) second sectional perspective view, and (c) end sectional perspective view of partially insulated beam formworks disposed to extend from both sides of a wall;
  • Figure 12 shows (a) first sectional perspective view, (b) second sectional perspective view, and (c) end sectional perspective view of partially insulated beam formworks disposed for forming a partially insulated suspended slab;
  • Figure 13 shows (a) perspective view and (b) exploded perspective view of an insulation assembly for the beam formwork in Figure 1 1 , (c) perspective view of the insulation assembly installed in the beam formwork, and (d) perspective sectional view of insulation assembly with poured concrete in the beam formwork; and
  • Figure 14 shows (a) perspective view of the use of a decking hanger assembly for forming a wider concrete beam between two beam formworks, (b) perspective view and (c) exploded perspective view the use of a decking hanger assembly for forming a wider and deeper concrete beam between two beam formworks.
  • FIG. 1 shows a beam formwork 10 according to a preferred embodiment of the present invention.
  • the beam formwork 10 comprises an elongated body having a base wall 12 and two side walls 14 extending upwardly from opposite longitudinal edges of the base wall 12.
  • the base wall 12 and the side walls 14 define a channel cavity 16 therebetween having an open top 18 and open ends 20.
  • Elongated indentations 22 are formed in a spaced parallel orientation in each of the base wall 12 and the side walls 14 to strengthen these walls.
  • Seats 24 are formed along top edges of the side walls 14, via the side wall top edges being formed into an L-shape, having an inwardly directed first tab 26 and an upwardly directed second tab 28.
  • the seats 24 are for receiving edges of decking plates 42 thereon as described below.
  • End flanges 30 extend from ends of the side walls 14, the end flanges 30 being directed outwardly sideways to be perpendicular to the side walls 14.
  • Flange attachment apertures 32 are formed along the end flanges 30.
  • Spaced bracket attachment apertures 34 are formed along lower edges of the side walls 14.
  • the beam formwork 10 in the embodiment is a roll formed metal beam and can be made in any dimensions and lengths as desired.
  • the end flanges 30 are illustrated in a folded out in-use position. It is preferred that the end flanges 30 are creased in the factory and folded out on site. This reduces transport costs and reduces the risk of damage to protruding flanges in transport. Factory controlled creasing allows for fast, accurate folding on site. It is preferred that the flanges are formed integrally with the beam section, However, they can be alternatively formed as a separate unit and attached by fasteners or a mechanical interlock to the side walls 14 and base wall 12.
  • Figure 2 shows a structure 1 10 comprising a plurality of the beam formworks 10 attached in spaced parallel manner to one side wall 14b of a larger dimension beam formwork 10b.
  • the beam formwork 10b is identical in features to the beam formwork 10 but having a wider base wall and taller side walls.
  • the flange attachment apertures 32 allow the end flanges 30 to be attached to other beams such as the side wall 14b of the beam formwork 10b, plates, or surfaces as required.
  • the end flanges 30 provides a structural metal surface through which appropriate fastenings can be inserted and attached. In the example, the end flanges 30 are attached to an external surface of the side wall 14b.
  • the flanges can be attached to beams, walls, formwork or other surfaces as required.
  • the beam formworks 10 are equally spaced along the side wall 14b with the top edges of the beam formworks 10 and 10b being at the same level. Reinforcement rods 50 placed on bar chairs (not shown) are disposed within the channel cavities 16 of the beam formworks 10 and 10b. The position, nature and number of reinforcement will be specified by the engineer in advance. Apertures 40 (see Figure 4 (b)) are formed in the side wall 14b at the intersections with the open ends 20 with the beam formworks 10. These apertures 40 allow reinforcement rods 50 of the beam formworks 10 to extend into the channel cavity 16 of the beam formwork 10b. Once installed, the channel cavities 16 of the beam formworks 10 and 10b are filled with concrete at the same time via the open tops 18 and concrete can pour through the apertures 40. When the concrete sets, the beam formworks 10 and 10b form strong structural concrete beams.
  • FIG 3 shows a structure 1 10 comprising a plurality of the beam formworks 10 attached in spaced parallel manner to opposite sides of a larger beam formwork 10b. This example arrangement is similar to that shown in Figure 2.
  • the beam formworks 10 on opposite sides of the beam formwork 10b are aligned, and reinforcement rods 50 of the beam formworks 10 extend through apertures 40 on both side walls 14b.
  • Figure 3(a) shows the placement of decking plates 42 to extend between adjacent beam formworks 10, with edges of the decking plates 42 received in the seats 24 of the beam formworks 10 and 10b.
  • the decking plates 42 are dimensioned to fill the gap between the beam formworks 10 and 10b.
  • Figure 4 shows a beam formwork 10 attached to another beam formwork 10 in a T junction arrangement. This is a similar attachment via the end flanges 30 to that shown above and shows the aperture 40 for the reinforcement rods 50 and the concrete.
  • Figure 5 shows an example building 120 comprising hollow walls 122 with beam formworks 10 extending between and connecting top sections of the hollow walls 122.
  • the hollow walls 122 each comprise parallel spaced panels 124 with connecting studs 126 therebetween (see Figure 6).
  • Long beam formworks 10c are disposed in a parallel spaced manner between opposing side walls of the building 120, with shorter beam formworks 10d extending perpendicular to the beam formworks 10c at the mid-sections thereof.
  • the beam formworks 10 are attached to external surfaces of the inner panels.
  • Figure 6 shows an alternative method of attaching the beam formwork 10 to a wall panel 124.
  • U-shaped cutouts 125 are formed along the top edge of the wall panels 124 which receives the end section of the beam formworks 10.
  • the end flanges 30 engage the inner surfaces of the wall panels 124 and are retained thereby, or they can be attached thereto by fasteners. This method provides a strong end structure as the end flanges 30 are embedded in the resulting concrete walls 122.
  • FIG. 7 shows a method of forming a suspended floor slab above a wall 130 using the beam formwork 10.
  • a plurality of beam formworks 10 are disposed in a parallel spaced manner along a top edge 132 of the wall 130.
  • a fascia panel 134 is mounted to the ends of the beam formworks 10 are attached to the outer panel 134.
  • the fascia panel 134 extends to a predetermined height above the beam formworks 10. With decking plates 42 between the beam formworks 10, concrete is poured which results in a formed suspended reinforced slab above the wall 130.
  • Figure 8 shows a beam formwork 10c configured as a stand-alone structural element.
  • the beam formwork 10c is similar to the beam formwork 10 above, but having its end flanges 30d bent inwardly towards each other. End plates 31 can then be attached to the end flanges 30d (to either the internal or external surfaces thereof) via fasteners 33 to close off the open ends and form a closed channel except for the open top 18. Concrete can then be poured which will form a concrete beam whenever any structural member is required such as a lintel above windows and doors. Alternatively, the end flanges can be longer and meet in the middle or overlap when bent inwardly, thus removing the need for the end plate.
  • FIG. 9 shows beam formwork 10 with a spreader bracket 60.
  • the spreader bracket 60 comprises a short piece 62 with edge tabs received in and attached to a slightly longer piece 62 also with edge tabs. The space between the adjacent edge tabs receives the second tabs 28 of the side walls 14. The spreader bracket 60 thus assists in maintaining the distance between the side walls 14 during concrete pour.
  • a plurality of the spreader brackets 60 can be used for the beam formworks 10 spaced along their lengths.
  • Figure 10 shows a ceiling connector bracket 70 which is an elongated right angle metal element.
  • the connector bracket 70 comprises a horizontal first web 72 and a vertical second web 74 with triangular reinforcement indents 76 at the corner junction between the webs.
  • the second web 74 comprises a series of spaced parallel vertical slots 78 formed therealong.
  • the first web 72 has an upwardly turned end flange 79.
  • bracket attachment apertures 34 Prior to the concrete pour, and removed once the concrete has set, leaving moulded screw holes in the formed concrete.
  • the connector bracket 70 can then be fixed to the screw holes via the slots 78 and fasteners 71 .
  • the levelness and alignment of the first webs 72 can be adjusted via the slots 78.
  • a ceiling panel 80 can then be mounted to the first webs 72 via fasteners 73.
  • FIG. 1 1 shows partially insulated beam formworks 10 disposed to extend from both sides of a wall 130.
  • This application for example is for forming a balcony which is at least partly thermally insulated between the exterior 142 and interior 144 of a building. This creates a lateral thermal break between the outside portion of a slab and the internal portion of a slab.
  • the wall 130 comprises an external insulation layer 132.
  • the beam formworks 10 comprise an insulation element 84 in their cavity 16, the insulation element 84 being disposed to be aligned with the insulation layer 132.
  • the insulation element 84 in one example can be an expanded polystyrene cylindrical segment which partly fills the cavity 16 at that area.
  • the insulation elements 84 provide a thermal break, as the insulation material 84 reduces the concrete mass in those areas restricting the thermal conductivity through the resulting structural element.
  • Figure 12 shows partially insulated beam formworks disposed for forming a partially insulated suspended slab above walls 130. This method involves placement of spaced insulation elements 84 along the length of the channel cavity 16 of the beam formworks 10. As above, this reduces the concrete mass in these areas and provides thermal insulation.
  • FIG 13 shows an insulation assembly 90 for the beam formwork in Figure 12.
  • the insulation assembly 90 comprises spaced insulation elements 84 being cylindrical segments.
  • Connector panels 86 are attached to end faces of the insulation elements 84.
  • the connector panels are dimensioned to be received in the channel cavity 16 and positions the insulation elements 84 at the required height and spacing.
  • Concrete 150 poured in the channel cavity 16 extends around the insulation elements 84 but retains their continuous composition.
  • FIG 14 (a) shows the use of a decking hanger assembly 170 for forming a wider concrete beam between two beam formworks.
  • the decking hanger assembly 170 comprises hangers 172 suspended from the sides of two facing beam formworks 10, and a deck panel 174 placed on the lower end of the hangers 172. Reinforcing rods 175 are positioned in the channels thus formed and the channels are filled with concrete. This arrangement allows decking to sit in between and level with the bottom of two beams formworks 10 forming a wide beam where additional strength is needed. In this case it is not below the beams in the rest of the floor so the ceiling is not affected.
  • Figure 14 (b) and (c) shows a decking hanger assembly 180 that allows for a wide and deep concrete beam to be formed.
  • the method is similar to the above but using taller hangers 172 and a wider deck panel 174 which creates wide and deep beams.
  • the walls of the beam formwork can be formed from material with corrugations, shapes, protrusions, etc. as required. This is preferred, to add additional strength and rigidity to the beam but not shown in all figures for simplicity.
  • the metal beam may be formed in any suitable way, illustratively by roll forming.
  • the beam formworks 10 can be however also made from other suitable material such as plastics.
  • the metal components required are fabricated in factory, to predetermined measurements and specifications for each job.
  • the components can also be cut on site especially when used as standalone structural elements.
  • Production in a factory is not subject to weather delays, can utilize significant mechanical and automated labour saving technologies, can be made to a higher, more controlled standard and may require a lower level of skilled labour, relative to construction on a building site.
  • Once prefabricated the onsite speed of construction is much faster while the amount of labour required onsite is vastly reduced, as is the skill level.
  • trained installers may replace traditional tradesmen on site, as they are assembling according to plan, not cutting, shaping and constructing as they go.
  • the beam formworks can be made in different sizes. While their main intended use is as ribs in reinforced concrete slabs, they can also be used virtually anywhere a structural member is required, such as universal beams and parallel flange channels. Their lightweight design means they are easily manhandled on site and into position without the need for mechanical lifting equipment.
  • the beams could be pre- or post-stressed in a conventional manner.
  • the flanges have pre-drilled holes to allow for screws, bolts or other fasteners to be inserted through and secured to an attachment surface. These may include, in particular, other beams of similar construction.
  • the flanges are secured before being filled with concrete. This form of construction facilitated by the novel beams means that a construction with no additional formwork is possible, with significant savings in labour and time.
  • the ends are sealed by the flanges being connected to another surface or component.
  • Flanges also assist in fixing beams to virtually any other stable surface including existing walls and other structures such as UB's and PFC's.
  • the flanges also provide the mounting surface for formwork to be attached to form the edge of slabs.
  • the beams according to the implementation described may be used in a variety of applications. For example, particularly deep or wide beams, or main beams, can be readily formed. Beams may be used as solid blocking, running at right angles to a series of beams to create a two- way slab. Beams may be used to support point loads above, such as a load bearing column.
  • the beams prior to assembly and filling, are relatively lightweight and can be handled without the need for cranes or other lifting machinery.
  • the channels in the beams allow for beams to interconnect with each other structurally, as reinforcement can pass from the end of the first beam into the side of the second beam. This can then make a 90 degree bend and tie into the second beam, or it can continue straight through and continue into a third beam on the other side.
  • Holes (aperture 40) for reinforcement or other purposes are preferably formed in the factory. They may be laser cut or punched to 90% for removal of the blank on site. Leaving them in until the beam is in place allows the beam to retain most of its strength to avoid being damaged during handling. Holes can also be provided in the side walls of the formwork beams for void formers to be inserted such as conduits for services to go through (electrical, data cables, plumbing etc).
  • Holes can also be made in the beams to allow void formers such as a length of conduit to be installed for services such as electrical and plumbing.
  • a concrete slab extends from inside a building to outside, for example to provide a deck or balcony
  • a thermal break especially in colder climates.
  • This may be, for example, a section of foam in the beam replacing or partly replacing concrete.
  • the beam may also have material removed, for example as cut outs or perforations, to further reduce the transfer of heat along the metal.
  • bottom reinforcement can be prepared in the factory already spot welded to the bar chairs and cut to length so that on site it only has to be placed into the beam.
  • Other spring loaded and braced high bar chairs can be placed into the bottom of the beam and then upon which a top layer or reinforcement bar can be fixed.
  • the use of the beams create voids in the ceilings for services such as electrical, plumbing, lighting, air conditioning, which is an advantage over solid slabs.
  • the decking material could be placed at the bottom of the beam, so that a wide beam is created with extra room for additional reinforcement material, should this be required.
  • the preferred embodiment allows for beams to be formed up quickly using minimal bracing and propping, allows for slabs to be formed up quickly using minimal bracing and propping, especially when used with a matching wall system.
  • the flanges prevent the beams/floor formwork separating from the wall formwork.
  • the wall formwork can act as the load bearing structure for the ends of the beams.
  • the side walls for example are shown extending generally perpendicular to the base wall.
  • the side walls can alternatively be diverging from the base wall, particularly with the use of the spreader bracket.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

L'invention concerne un coffrage (10) à poutrelles, qui comprend un corps allongé ayant une paroi de base (12) et deux parois latérales (14) s'étendant vers le haut depuis des bords longitudinaux opposés de la paroi de base (12). La paroi de base (12) et les parois latérales (14) définissent une cavité de canal (16) entre elles, ayant une partie supérieure ouverte (18) et des extrémités ouvertes (20). Des sièges (24) sont formés le long de bords supérieurs des parois latérales (14), par le biais des bords supérieurs des parois latérales formés en une forme de L, pour recevoir des bords de plaques de recouvrement (42) sur eux. Des semelles d'extrémité (30) s'étendent depuis des extrémités des parois latérales (14), les semelles d'extrémité (30) étant dirigées latéralement vers l'extérieur pour être perpendiculaires aux parois latérales (14). Des ouvertures (32) de fixation de semelle sont formées le long des semelles d'extrémité (30). Des ouvertures (34) de fixation de support espacées sont formées le long de bords inférieurs des parois latérales (14).
PCT/AU2016/050254 2015-04-07 2016-04-07 Coffrage à poutrelles permanentes pour structures en béton WO2016161478A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2015901245 2015-04-07
AU2015901245A AU2015901245A0 (en) 2015-04-07 Stay-in-place formwork for concrete structures

Publications (1)

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WO2016161478A1 true WO2016161478A1 (fr) 2016-10-13

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10513849B1 (en) 2019-05-01 2019-12-24 Storage Structures, Inc. Structural member assembly and support structures comprising same
US10597864B1 (en) 2019-05-01 2020-03-24 Storage Structures, Inc. Structural member assemblies, beams, and support structures comprising same
JP2021042568A (ja) * 2019-09-10 2021-03-18 Ｖｕｉｌｄ株式会社 型枠、建築物及び建築方法
CN112663951A (zh) * 2020-12-29 2021-04-16 晟通科技集团有限公司 梁模板及梁模组合
US11560725B2 (en) * 2018-01-29 2023-01-24 Inquik Ip Holdings Pty Ltd Formwork brace

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2122886A5 (fr) * 1971-01-20 1972-09-01 Muller Wilhelm
US4885884A (en) * 1988-05-25 1989-12-12 Schilger Herbert K Building panel assembly
US20130283721A1 (en) * 2012-04-25 2013-10-31 Tae Sang Ahn Steel frame structure using u-shaped composite beam

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2122886A5 (fr) * 1971-01-20 1972-09-01 Muller Wilhelm
US4885884A (en) * 1988-05-25 1989-12-12 Schilger Herbert K Building panel assembly
US20130283721A1 (en) * 2012-04-25 2013-10-31 Tae Sang Ahn Steel frame structure using u-shaped composite beam

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11560725B2 (en) * 2018-01-29 2023-01-24 Inquik Ip Holdings Pty Ltd Formwork brace
US10513849B1 (en) 2019-05-01 2019-12-24 Storage Structures, Inc. Structural member assembly and support structures comprising same
US10597864B1 (en) 2019-05-01 2020-03-24 Storage Structures, Inc. Structural member assemblies, beams, and support structures comprising same
US11248373B2 (en) 2019-05-01 2022-02-15 Storage Structures Inc. Structural member assemblies, beams, and support structures comprising same
US11859377B2 (en) 2019-05-01 2024-01-02 Storage Structures, Llc Structural member assemblies, beams, and support structures comprising same
JP2021042568A (ja) * 2019-09-10 2021-03-18 Ｖｕｉｌｄ株式会社 型枠、建築物及び建築方法
JP7270930B2 (ja) 2019-09-10 2023-05-11 Ｖｕｉｌｄ株式会社 型枠、建築物及び建築方法
CN112663951A (zh) * 2020-12-29 2021-04-16 晟通科技集团有限公司 梁模板及梁模组合

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