EP2998455B1 - Apparatus - Google Patents
Apparatus Download PDFInfo
- Publication number
- EP2998455B1 EP2998455B1 EP15185955.0A EP15185955A EP2998455B1 EP 2998455 B1 EP2998455 B1 EP 2998455B1 EP 15185955 A EP15185955 A EP 15185955A EP 2998455 B1 EP2998455 B1 EP 2998455B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- divider plate
- concrete
- top component
- region
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004567 concrete Substances 0.000 claims description 99
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 238000005266 casting Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 238000007373 indentation Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 239000011150 reinforced concrete Substances 0.000 description 5
- 238000009415 formwork Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011178 precast concrete Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- -1 for example Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/10—Devices for levelling, e.g. templates or boards
-
- 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
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/06—Methods of making joints
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/08—Packing of metal
-
- 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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/168—Spacers connecting parts for reinforcements and spacing the reinforcements from the form
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
- E04F15/14—Construction of joints, e.g. dividing strips
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
- E04F15/14—Construction of joints, e.g. dividing strips
- E04F15/142—Dividing strips or boundary strips
- E04F15/145—Dividing strips or boundary strips adjustable in height
-
- 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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
-
- 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
- E04B1/48—Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses
- E04B1/483—Shear dowels to be embedded in concrete
-
- 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
- E04B2005/322—Floor structures wholly cast in situ with or without form units or reinforcements with permanent forms for the floor edges
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
- E04C5/205—Ladder or strip spacers
Definitions
- the present invention relates to an apparatus for forming a joint in a concrete floor on an upper floor of a building, and a method for forming a joint in a concrete floor on an upper floor of a building.
- Upper floors in buildings with a steel frame can be constructed by placing sheets across the steel beams and pouring concrete on top of the sheets.
- the sheets are generally either thin gauge corrugated steel sheets or precast concrete sheets (also known as hollowcore concrete planks). It is not usually possible to pour a whole concrete floor in one day, making it necessary to stop the concrete part way along the floor being cast. At present, it is common to use a simple piece of timber across the top of the corrugated steel or concrete sheet to stop the concrete, and to then remove the timber the next day before pouring the rest of the floor.
- concrete floor slabs are generally cast on top of a slip membrane to allow free movement.
- These concrete floor slabs are generally cast as adjoining slab panels where each slab panel is cast inside a formwork, which defines a space in which to cast the concrete.
- the formwork may be removable, which means it is removed after the concrete has cured, or it may be leave-in-place formwork, which forms part of the resulting concrete structure.
- After casting, such concrete slabs display drying shrinkage, which generally results in the opening of the joints between the slab panels, due to each concrete slab panel shrinking away from the joint; a joint used to accommodate such shrinking, or contraction, is known as a "contraction joint".
- Another type of joint can be adapted to also accommodate thermal expansion of a slab panel, and is known as an "expansion joint".
- the surface on which the concrete is being cast will be adapted such that the concrete will grip the entire surface.
- Corrugated steel sheets are undulating and often contain additional ridges to help the concrete to grip.
- Precast concrete sheets generally have a very rough and/or undulating upper surface for the concrete to grip. Because of this, the concrete will be held in place across the entire sheet. When the concrete sets, the concrete floor as a whole will therefore develop very small cracks throughout, rather than contract as a concrete slab on a slip membrane on the subbase would. Casting concrete on an upper deck surface therefore needs to meet very different requirements from casting concrete on the subbase. On an upper deck surface, it is important to lock or tie an entire floor together, while avoiding any major cracks running through the floor.
- elongate as used in the context of the invention, for example in the context of the divider plate and the top component, means that the relevant component has an elongate shape.
- the longitudinal axis of the elongate component is, in use, positioned parallel or substantially parallel to the longitudinal axis of the apparatus.
- the apparatus provides a leave-in-place system which allows a concrete floor to be poured without the need to use and remove timber partitions.
- the adjustability of the height of the apparatus allows it to suit a range of concrete floor heights.
- the divider plate is an elongate flat section of material.
- the divider plate may be non-deformable. This means that the material from which the divider plate is made is not compressible by the concrete once the concrete has been cast on one or both sides of the divider plate.
- the divider plate may be rigid.
- the divider plate may be formed from a metal such as, for example, steel. This can result in a divider plate of high mechanical strength, capable of withstanding the forces acting upon it during the casting of concrete.
- the divider plate may comprise a longitudinal fold at the top and/or the bottom of the divider plate.
- a fold can, for example, be a longitudinal L-fold, a longitudinal J-fold, a longitudinal V-fold or a Dutch fold (where the divider plate is completely folded back on itself).
- Such a fold can strengthen the divider plate.
- the elongate top component is formed from a single elongate section of material.
- the top component may be formed from a metal such as, for example, steel.
- the top component may be unitary.
- the top component is formed from a single sheet of metal by rolling and/or folding.
- the top component is formed as an elongate extrusion.
- the elongate extrusion may have a substantially constant cross-section along its length.
- the top component may comprise an elongate side wall which, in use, sits parallel (or substantially parallel) and adjacent to a first side of the divider plate.
- the top component may also comprise a flange, extending from the side wall sitting parallel (or substantially parallel) and adjacent to the first side of the divider plate in use, for example resulting in a top component with a substantially L-shaped cross-section.
- the flange may extend into the area where concrete is poured. The flange can therefore engage with the concrete, helping to lock the apparatus in position.
- the flange may comprise a plurality of holes. Such holes allow the flange to become more strongly embedded in the concrete during casting and curing.
- the top component comprises an elongate concrete-engagement component which extends into the region where, in use, concrete is poured.
- the elongate concrete-engagement component may comprise a plurality of holes. Such holes allow the elongate concrete-engagement component to become more strongly embedded in the concrete during casting and curing.
- the top component comprises a top strip and two side walls defining a socket between them.
- One or each of the two side walls may also have a flange which extends from the side wall and which, in use, extends into the area where concrete is poured, to engage with the concrete in use, as described above.
- the divider plate and top component are combined to form the apparatus for forming a joint in a concrete floor according to claim 1.
- the apparatus may be suitable for forming a joint in a concrete floor on an upper floor of a building. It is envisaged that in use, the joint may be positioned on a sheet, such as a thin gauge corrugated steel sheet or a precast concrete sheet, which lies across the steel beams in a steel frame building.
- a sheet such as a thin gauge corrugated steel sheet or a precast concrete sheet, which lies across the steel beams in a steel frame building.
- the surface of such a sheet positioned on an upper floor is known as an upper deck surface.
- the apparatus may be for forming a tied joint.
- a tied joint is intended to tie together the concrete on each side of the joint.
- the divider plate has a top region.
- the top component has at least one bottom region.
- the bottom region of the top component may preferably overlap, at least partially, with the top region of the divider plate.
- the divider plate is arranged to be securable to the upper deck surface.
- the top component may be arranged to be movable relative to the divider plate.
- the top component can be moved up and down relative to the divider plate, which allows the height of the apparatus above the upper deck surface to be adjusted.
- the apparatus therefore allows a range of different formwork heights to be achieved, which can be continuously variable, by using a single size of divider plate instead of requiring a large number of different sizes of divider plates. Therefore the apparatus can enhance the ease with which concrete floors can be produced, particularly on upper floors of buildings, can enhance the performance characteristics of the resulting concrete floors, and can eliminate the need to trim off concrete spillage, which can save time and reduce waste management costs on site.
- the top component is connectable to the top region of the divider plate.
- the top component may be connectable along the top region of the divider plate.
- at least one of the divider plate and the top component may comprise members adapted to engage with the other, to hold the top component in place along the top region of the divider plate.
- the top component may comprise a top strip and two side walls defining a socket between them.
- the side walls may function as biasing means which can hold the top component in place relative to the divider plate.
- the top component comprises a socket and the socket can be placed over the divider plate to variable distance, which means that the divider plate is insertable into the socket to variable depth.
- the distance to which the socket is placed over the divider plate may be adjusted in a stepwise manner.
- the distance to which the socket is placed over the divider plate may be adjusted in a continuous manner.
- the top component comprises members adapted to engage with the divider plate.
- the divider plate comprises members adapted to engage with the top component.
- the top component can, for example, be held in position by friction.
- the divider plate and the top component comprise interengaging members arranged to hold the top component in place along the top region of the divider plate.
- the interengaging members may, for example, comprise surface profiling and/or serrations.
- the top component is arranged to be held in position along the top region of the divider plate by means of fastening means, such as for example self-tapping (self-fastening) screws or nuts and bolts.
- the divider plate has a bottom region which comprises more than one indentation for engaging an undulating surface.
- the shape of the bottom region of the divider plate is such that, in use, it can engage with the corrugations of a corrugated steel sheet.
- the parts of the divider plate which protrude into the corrugations of the corrugated steel sheet may follow the contours of the corrugations closely, or may leave one or more gaps between the protrusions on the divider plate and the corrugations of the corrugated steel sheet.
- the shape of the bottom region of the divider plate is such that, in use, it can mate with the corrugations of a corrugated steel sheet.
- the divider plate has a bottom edge, which bounds the bottom region of the divider plate.
- the shape of the bottom region of the divider plate is such that, in use, the bottom edge of the divider plate can engage with or mate with the corrugations of a corrugated steel sheet.
- the pattern formed when the bottom edge of the divider plate and the corrugated steel sheet abut may contain one or more gaps in between the divider plate and the corrugated steel sheet.
- the divider plate is connectable to the upper deck surface in use.
- the divider plate may, for example, be connected to the upper deck surface by means of one or more brackets.
- the brackets may, for example, be connected to the divider plate and the upper deck surface by means of self-tapping screws.
- the divider plate may be arranged to be securable to the upper deck surface.
- the divider plate may comprise a longitudinal fold at the bottom of the divider plate.
- the divider plate may comprise one or more folded-over tabs at the bottom of the divider plate. Such a fold or such tabs may allow the divider plate to be connected to the upper deck surface by means of, for example, self-tapping screws.
- the apparatus comprises one or more brackets which, in use, secure the divider plate to the subbase.
- Securing the apparatus to the upper deck surface can make the apparatus easier to operate, since it allows the concrete to be cast without the risk of the apparatus shifting in position (in a substantially horizontal direction) under the influence of the concrete thrust. This can enhance the ease with which concrete floor slabs can be produced.
- the apparatus according to the first aspect of the invention further comprises: at least one aperture provided in the divider plate and/or in the top component or by a combination of the divider plate and the top component, which aperture is adapted to allow a connector to extend therethrough between the first and second sides of the apparatus.
- the at least one aperture is provided in the divider plate and/or in the top component to allow a connector to extend therethrough between the first and second sides of the apparatus.
- the purpose of the connector is to engage with the concrete on each side of the apparatus in use. After the concrete has been cast, the connector will be embedded into the concrete on each side of the apparatus.
- the connector is a dowel bar.
- the dowel bar may be made of metal, such as steel.
- the dowel bar may have surface profiling, which can improve engagement with the concrete in use.
- the connector is a bar forming part of a mesh, which may be made of metal, such as steel.
- a mesh may, for example, be the type of mesh used inside reinforced concrete.
- the apparatus comprises at least one connector for extending through the at least one aperture.
- the at least one connector may be positioned through the at least one aperture and may extend on each side of the apparatus into the region where, in use, concrete is cast.
- the at least one aperture is provided in the divider plate.
- at least one aperture may further be provided in the top component, and/or by a combination of the divider plate and the top component.
- the at least one aperture is provided in the top component.
- at least one aperture may further be provided in the divider plate, and/or by a combination of the divider plate and the top component.
- the at least one aperture is provided by a combination of the divider plate and the top component.
- the at least one aperture may be defined by the junction between the divider plate and the top component.
- the bottom region of the top component may overlap with the top region of the divider plate.
- One or more apertures may be defined when the regions do not overlap along their entire lengths.
- the bottom region of the top component and/or the top region of the divider plate may be shaped, such as for example being castellated or undulating, so that the two regions only overlap at certain points along their lengths, defining apertures between the points of overlap. This means that apertures are created when the top component and the divider plate are combined.
- a connector may be placed between the top component and the divider plate such that it passes through the aperture when the two are combined. This allows a wider range of connectors to be used, such as connectors including sections that are too wide or the wrong shape to be inserted through the apertures otherwise. Where a reinforcement mesh is used inside the concrete in use, it has the advantage of allowing the reinforcement to continue across the joint.
- the divider plate has a top edge, which bounds the top region of the divider plate.
- the top component has at least one bottom edge, which bounds the at least one bottom region.
- the at least one aperture may be defined by the top edge of the divider plate and the bottom edge of the top component, for example by means of a groove in the divider plate extending from the top edge of the divider plate, and/or a groove in the top component extending from the bottom edge of the top component.
- step (i) comprises the steps of:
- At least one connector may be placed in the at least one aperture provided in the divider plate and/or in the top component or by a combination of the divider plate and the top component.
- the connector may be placed in the aperture before step (i-a), between steps (i-a) and (i-b), between steps (i-b) and (ii), or after step (ii).
- the connector may be placed in the aperture between steps (i-a) and (i-b).
- steps (i-a) and (i-b) For example, when producing a floor of reinforced concrete, it is possible to set up the elongate divider plate, place a mesh over the divider plate, and subsequently position the top component such that the bars of the mesh sit in the apertures defined by the junction between the divider plate and the top component. This arrangement therefore significantly improves the ease of producing a concrete floor.
- substantially parallel is to be understood as being at an angle of less than 20° away from true parallel. In an embodiment, this is less than 19°, less than 18°, less than 17°, less than 16°, less than 15°, less than 14°, less than 13°, less than 12°, less than 11°, less than 10°, less than 9°, less than 8°, less than 7°, less than 6°, less than 5°, less than 4°, less than 3°, less than 2°, or less than 1° away from true parallel. Any angle away from true parallel can be to either side of true parallel.
- the apparatus 1 broadly comprises a divider plate 2 and a top member 3A, 3B or 3C.
- the divider plate 2 is an elongate flat section of steel.
- the divider plate 2 comprises apertures 4 along its length at regular intervals.
- the apertures 4 are adapted to receive dowel bars 5.
- the dowel bars 5 are made of steel and have surface profiling to improve engagement with the concrete in use.
- the top member 3A, 3B or 3C is an elongate section of steel.
- the top member is unitary.
- the top member 3A or 3B comprises two elongate side walls 6a, 6b defining a socket 7 between them.
- Each of the two side walls has a flange 8a, 8b which extends from the side wall and which, in use, extends into the area where concrete is poured.
- the flange 8a, 8b can therefore engage with the concrete, helping to lock the apparatus 1 in position.
- Each flange 8a, 8b can comprise a plurality of holes 9. These holes 9 allow the elongate concrete-engagement member 8a, 8b to become more strongly embedded in the concrete.
- the top member 3C comprise one elongate side wall 6, which has a flange 8 with which extends from the side wall 6 and which, in use, extends into the area where concrete is poured. This results in a top member 3C with a substantially L-shaped cross-section.
- the flange 8 comprises a plurality of holes 9, which allow the flange 8 to become more strongly embedded in the concrete.
- apertures 10 are provided by a combination of the divider plate 2 and the top member 3B.
- the bottom region of the top member 3B overlaps with the top region of the divider plate 2.
- Apertures 10 are defined since the regions do not overlap along their entire lengths.
- the bottom region of the top member 3B is castellated, so that the top member 3B does not overlap with the entire top region of the divider plate 2; apertures 10 are left between the points of overlap.
- the apertures 10 are defined by the top edge of the divider plate 2 and the bottom edge of the top member 3B, by means of regular grooves 11 in the top member 3B extending from the bottom edge of the top member 3B.
- This arrangement where the apertures 10 are provided by a combination of the divider plate 2 and the top member 3B, are especially suited for use with a mesh, such as a steel mesh 12 of the type which is commonly used inside reinforced concrete, as shown in Figures 7 and 8 .
- the bottom region of the divider plate 2 comprises more than one indentation for engaging an undulating surface.
- a surface may, for example, be a corrugated steel sheet 13.
- the shape of the bottom region of the divider plate 2 allows the bottom edge of the divider plate 2 to mate with the corrugations of the corrugated steel sheet 13.
- the divider plate 2 is placed on an upper deck surface which lies across the steel beams of a steel frame building; this surface can be formed by corrugated steel sheets 13 as shown in Figures 5-8 .
- the divider plate 2 can be connected to the upper deck surface 13 by means of one or more brackets 15.
- the brackets 15 can be connected to the divider plate 2 and the upper deck surface 13 by means of self-tapping screws (not shown).
- the divider plate 2 may comprise a longitudinal fold or one or more folded-over tabs at the bottom of the divider plate (not shown) for securing the divider plate 2 to the upper deck surface 13.
- Such a fold or such tabs allow the divider plate 2 to be connected to the upper deck surface 13 by means of, for example, self-tapping screws.
- the top member 3A, 3B or 3C is connected to the top region of the divider plate 2.
- the top member 3A, 3B or 3C is moved relative to the divider plate 2 until the desired height of the apparatus above the upper deck surface 13 is achieved.
- top member 3A or 3B comprises a socket 7, as shown in Figures 5-13
- the socket 7 is placed over the divider plate 2 to the desired distance.
- Figure 9 shows a situation where the socket 7 has been placed over the divider plate 2
- Figure 10 shows a situation where the top member 3A has been moved further down relative to the divider 2 plate than in Figure 9 .
- the side walls 6a, 6b surrounding the socket 7 may function as biasing means which can hold the top member 3A or 3B in place relative to the divider plate 2.
- the top member 3A or 3B can also be connected to the divider plate 2 by means of self-tapping screws (not shown).
- top member 3C has a substantially L-shaped cross-section, as shown in Figure 14 , it can be connected to the divider plate 2 by means of self-tapping screws (not shown).
- the top member 3A, 3B or 3C may be connected to the top region of the divider plate 2 in an offset or staggered manner in the direction of the longitudinal axis of the apparatus 1, as shown in Figure 15 .
- the top member 3A, 3B or 3C and the divider plate 2 may be connected in such a way that their ends line up in the direction of the longitudinal axis of the apparatus 1, to form a butt joint.
- Dowel bars 5 may be used to connect the concrete on each side of the apparatus 1, and can be positioned through apertures 4 in the divider plate 2, as shown in Figures 5 , 6 , 9-14 . In use, the dowel bars 5 are placed through the apertures 4 after concrete has been cast on one side of the apparatus 1, and are therefore help in position within apertures 4 by the concrete.
- the concrete can be plain concrete or reinforced concrete. In the case of reinforced concrete, it may be reinforced with steel fibres or with a steel mesh 12. The main purpose of the reinforcement is to provide extra tensile strength to the concrete and to control cracking within the concrete as it cures.
- the mesh may be placed between the divider plate 2 and the top member, by using a top member 3B where apertures 10 are provided by a combination of the divider plate 2 and the top member 3B.
- a top member 3B where apertures 10 are provided by a combination of the divider plate 2 and the top member 3B.
- the divider plate 2 is placed on an upper deck surface, which can be formed by corrugated steel sheets 13 as shown in Figures 7-8 .
- the mesh 12 is then placed on top of the divider plate 2.
- the top member 3B contains regular grooves 11 extending from the bottom edge of the top member 3B, which can be fitted over the bars in the mesh 12, resulting in an apparatus where the bars of the mesh 12 pass through apertures 10 provided by a combination of the divider plate 2 and the top member 3B.
- additional dowel bars 5 through for example the divider plate 2 may also be used (not shown).
- the concrete may also be reinforced with a steel mesh 12 without the mesh passing through the apparatus 1.
- a steel mesh 12 may be used in combination with one or more dowel bars 5 passing through the apparatus, as shown in Figure 13 . It is envisaged that in use, the mesh 12 may be cut on each side of the apparatus 1. In such cases, the mesh 12 may be attached to the dowel bars 5 for an improved connection throughout the concrete floor.
- the apparatus 1 will form a tied joint within a concrete floor; it is intended to tie together the concrete on each side of the joint. This is as opposed to, for example, opening up like a "contraction joint" on a ground floor.
- the apparatus 1 After the apparatus 1 has been set up as described above, the apparatus 1 will bound a space for casting concrete. Concrete is then poured into the space. Concrete is first cast on one side of the divider plate 2, as shown in Figures 6 , 8 and 11 . Where appropriate, dowel bars 5 may then be placed through apertures 4 in for example the divider plate 2 into the concrete on the first side. Concrete is then cast on the remaining side of the apparatus 1, as shown in Figures 12 and 13 .
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Description
- The present invention relates to an apparatus for forming a joint in a concrete floor on an upper floor of a building, and a method for forming a joint in a concrete floor on an upper floor of a building.
- Upper floors in buildings with a steel frame can be constructed by placing sheets across the steel beams and pouring concrete on top of the sheets. The sheets are generally either thin gauge corrugated steel sheets or precast concrete sheets (also known as hollowcore concrete planks). It is not usually possible to pour a whole concrete floor in one day, making it necessary to stop the concrete part way along the floor being cast. At present, it is common to use a simple piece of timber across the top of the corrugated steel or concrete sheet to stop the concrete, and to then remove the timber the next day before pouring the rest of the floor. In the case of corrugated steel sheets, further pieces of shaped wood (or rigid foam) are often used to plug the troughs in the corrugated profile, or the concrete is simply allowed to pour through until it stops of its own accord with the under spill being removed later, once set.
- When casting concrete floors on the ground, known as the subbase, concrete floor slabs are generally cast on top of a slip membrane to allow free movement. These concrete floor slabs are generally cast as adjoining slab panels where each slab panel is cast inside a formwork, which defines a space in which to cast the concrete. The formwork may be removable, which means it is removed after the concrete has cured, or it may be leave-in-place formwork, which forms part of the resulting concrete structure. After casting, such concrete slabs display drying shrinkage, which generally results in the opening of the joints between the slab panels, due to each concrete slab panel shrinking away from the joint; a joint used to accommodate such shrinking, or contraction, is known as a "contraction joint". Another type of joint can be adapted to also accommodate thermal expansion of a slab panel, and is known as an "expansion joint".
- In the case of casting concrete on an upper deck surface (i.e. on an upper floor of a building), the surface on which the concrete is being cast will be adapted such that the concrete will grip the entire surface. Corrugated steel sheets are undulating and often contain additional ridges to help the concrete to grip. Precast concrete sheets generally have a very rough and/or undulating upper surface for the concrete to grip. Because of this, the concrete will be held in place across the entire sheet. When the concrete sets, the concrete floor as a whole will therefore develop very small cracks throughout, rather than contract as a concrete slab on a slip membrane on the subbase would. Casting concrete on an upper deck surface therefore needs to meet very different requirements from casting concrete on the subbase. On an upper deck surface, it is important to lock or tie an entire floor together, while avoiding any major cracks running through the floor.
- It is an aim of the present invention to provide an apparatus for forming a joint between concrete floor sections on an upper deck surface, embodiments of which can enhance the ease of casting the concrete floor and the performance characteristics of the resulting concrete floor.
- Document
US 1,826,062 discloses an apparatus for forming a joint in a concrete floor according to the preamble ofclaim 1 and a method for forming such a joint according toclaim 13. - According to a first aspect of the present invention there is provided an apparatus for forming a joint in a concrete floor according to
claim 1. - The term "elongate" as used in the context of the invention, for example in the context of the divider plate and the top component, means that the relevant component has an elongate shape. Suitably, the longitudinal axis of the elongate component is, in use, positioned parallel or substantially parallel to the longitudinal axis of the apparatus.
- The apparatus provides a leave-in-place system which allows a concrete floor to be poured without the need to use and remove timber partitions. The adjustability of the height of the apparatus allows it to suit a range of concrete floor heights.
- In an embodiment, the divider plate is an elongate flat section of material.
- Optionally, the divider plate may be non-deformable. This means that the material from which the divider plate is made is not compressible by the concrete once the concrete has been cast on one or both sides of the divider plate. Optionally, the divider plate may be rigid. Advantageously, the divider plate may be formed from a metal such as, for example, steel. This can result in a divider plate of high mechanical strength, capable of withstanding the forces acting upon it during the casting of concrete.
- Suitably, the divider plate may comprise a longitudinal fold at the top and/or the bottom of the divider plate. Such a fold can, for example, be a longitudinal L-fold, a longitudinal J-fold, a longitudinal V-fold or a Dutch fold (where the divider plate is completely folded back on itself). Such a fold can strengthen the divider plate.
- In an embodiment, the elongate top component is formed from a single elongate section of material. Advantageously, the top component may be formed from a metal such as, for example, steel. Optionally, the top component may be unitary.
- In an embodiment, the top component is formed from a single sheet of metal by rolling and/or folding.
- In an embodiment, the top component is formed as an elongate extrusion. Advantageously, the elongate extrusion may have a substantially constant cross-section along its length.
- The top component may comprise an elongate side wall which, in use, sits parallel (or substantially parallel) and adjacent to a first side of the divider plate. The top component may also comprise a flange, extending from the side wall sitting parallel (or substantially parallel) and adjacent to the first side of the divider plate in use, for example resulting in a top component with a substantially L-shaped cross-section. In use, the flange may extend into the area where concrete is poured. The flange can therefore engage with the concrete, helping to lock the apparatus in position. Advantageously, the flange may comprise a plurality of holes. Such holes allow the flange to become more strongly embedded in the concrete during casting and curing.
- In an embodiment, the top component comprises an elongate concrete-engagement component which extends into the region where, in use, concrete is poured. Advantageously, the elongate concrete-engagement component may comprise a plurality of holes. Such holes allow the elongate concrete-engagement component to become more strongly embedded in the concrete during casting and curing.
- In an embodiment, the top component comprises a top strip and two side walls defining a socket between them. One or each of the two side walls may also have a flange which extends from the side wall and which, in use, extends into the area where concrete is poured, to engage with the concrete in use, as described above.
- In use, the divider plate and top component are combined to form the apparatus for forming a joint in a concrete floor according to
claim 1. - Advantageously, the apparatus may be suitable for forming a joint in a concrete floor on an upper floor of a building. It is envisaged that in use, the joint may be positioned on a sheet, such as a thin gauge corrugated steel sheet or a precast concrete sheet, which lies across the steel beams in a steel frame building. The surface of such a sheet positioned on an upper floor is known as an upper deck surface.
- Preferably, the apparatus may be for forming a tied joint. A tied joint is intended to tie together the concrete on each side of the joint.
- The divider plate has a top region. The top component has at least one bottom region. When combined, the bottom region of the top component may preferably overlap, at least partially, with the top region of the divider plate.
- In an embodiment, the divider plate is arranged to be securable to the upper deck surface. Preferably, the top component may be arranged to be movable relative to the divider plate.
- In use, the top component can be moved up and down relative to the divider plate, which allows the height of the apparatus above the upper deck surface to be adjusted. The apparatus therefore allows a range of different formwork heights to be achieved, which can be continuously variable, by using a single size of divider plate instead of requiring a large number of different sizes of divider plates. Therefore the apparatus can enhance the ease with which concrete floors can be produced, particularly on upper floors of buildings, can enhance the performance characteristics of the resulting concrete floors, and can eliminate the need to trim off concrete spillage, which can save time and reduce waste management costs on site.
- The top component is connectable to the top region of the divider plate. Suitably, the top component may be connectable along the top region of the divider plate. Optionally, at least one of the divider plate and the top component may comprise members adapted to engage with the other, to hold the top component in place along the top region of the divider plate.
- As mentioned above, the top component may comprise a top strip and two side walls defining a socket between them. Advantageously, the side walls may function as biasing means which can hold the top component in place relative to the divider plate.
- In an embodiment, the top component comprises a socket and the socket can be placed over the divider plate to variable distance, which means that the divider plate is insertable into the socket to variable depth. Optionally, the distance to which the socket is placed over the divider plate may be adjusted in a stepwise manner. Alternatively, the distance to which the socket is placed over the divider plate may be adjusted in a continuous manner.
- In an embodiment, the top component comprises members adapted to engage with the divider plate. In an embodiment, the divider plate comprises members adapted to engage with the top component. The top component can, for example, be held in position by friction.
- In an embodiment, the divider plate and the top component comprise interengaging members arranged to hold the top component in place along the top region of the divider plate. The interengaging members may, for example, comprise surface profiling and/or serrations.
- In an embodiment, the top component is arranged to be held in position along the top region of the divider plate by means of fastening means, such as for example self-tapping (self-fastening) screws or nuts and bolts.
- The divider plate has a bottom region which comprises more than one indentation for engaging an undulating surface.
- The shape of the bottom region of the divider plate is such that, in use, it can engage with the corrugations of a corrugated steel sheet. The parts of the divider plate which protrude into the corrugations of the corrugated steel sheet may follow the contours of the corrugations closely, or may leave one or more gaps between the protrusions on the divider plate and the corrugations of the corrugated steel sheet. Advantageously, the shape of the bottom region of the divider plate is such that, in use, it can mate with the corrugations of a corrugated steel sheet.
- The divider plate has a bottom edge, which bounds the bottom region of the divider plate. Preferably, the shape of the bottom region of the divider plate is such that, in use, the bottom edge of the divider plate can engage with or mate with the corrugations of a corrugated steel sheet. Optionally, the pattern formed when the bottom edge of the divider plate and the corrugated steel sheet abut may contain one or more gaps in between the divider plate and the corrugated steel sheet.
- In an embodiment, the divider plate is connectable to the upper deck surface in use. The divider plate may, for example, be connected to the upper deck surface by means of one or more brackets. The brackets may, for example, be connected to the divider plate and the upper deck surface by means of self-tapping screws.
- As mentioned above, the divider plate may be arranged to be securable to the upper deck surface. Optionally, the divider plate may comprise a longitudinal fold at the bottom of the divider plate. Optionally, the divider plate may comprise one or more folded-over tabs at the bottom of the divider plate. Such a fold or such tabs may allow the divider plate to be connected to the upper deck surface by means of, for example, self-tapping screws.
- In an embodiment, the apparatus comprises one or more brackets which, in use, secure the divider plate to the subbase.
- Securing the apparatus to the upper deck surface can make the apparatus easier to operate, since it allows the concrete to be cast without the risk of the apparatus shifting in position (in a substantially horizontal direction) under the influence of the concrete thrust. This can enhance the ease with which concrete floor slabs can be produced.
- In an embodiment, the apparatus according to the first aspect of the invention further comprises:
at least one aperture provided in the divider plate and/or in the top component or by a combination of the divider plate and the top component, which aperture is adapted to allow a connector to extend therethrough between the first and second sides of the apparatus. - The at least one aperture is provided in the divider plate and/or in the top component to allow a connector to extend therethrough between the first and second sides of the apparatus. The purpose of the connector is to engage with the concrete on each side of the apparatus in use. After the concrete has been cast, the connector will be embedded into the concrete on each side of the apparatus.
- In an embodiment, the connector is a dowel bar. Advantageously, the dowel bar may be made of metal, such as steel. Preferably the dowel bar may have surface profiling, which can improve engagement with the concrete in use.
- In an embodiment, the connector is a bar forming part of a mesh, which may be made of metal, such as steel. Such a mesh may, for example, be the type of mesh used inside reinforced concrete.
- In an embodiment, the apparatus comprises at least one connector for extending through the at least one aperture. Preferably, the at least one connector may be positioned through the at least one aperture and may extend on each side of the apparatus into the region where, in use, concrete is cast.
- In an embodiment, the at least one aperture is provided in the divider plate. Optionally, at least one aperture may further be provided in the top component, and/or by a combination of the divider plate and the top component.
- In an embodiment, the at least one aperture is provided in the top component. Optionally, at least one aperture may further be provided in the divider plate, and/or by a combination of the divider plate and the top component.
- In an embodiment, the at least one aperture is provided by a combination of the divider plate and the top component.
- When at least one aperture is provided by a combination of the divider plate and the top component, advantageously the at least one aperture may be defined by the junction between the divider plate and the top component. As mentioned previously, the bottom region of the top component may overlap with the top region of the divider plate. One or more apertures may be defined when the regions do not overlap along their entire lengths. For example, the bottom region of the top component and/or the top region of the divider plate may be shaped, such as for example being castellated or undulating, so that the two regions only overlap at certain points along their lengths, defining apertures between the points of overlap. This means that apertures are created when the top component and the divider plate are combined. A connector may be placed between the top component and the divider plate such that it passes through the aperture when the two are combined. This allows a wider range of connectors to be used, such as connectors including sections that are too wide or the wrong shape to be inserted through the apertures otherwise. Where a reinforcement mesh is used inside the concrete in use, it has the advantage of allowing the reinforcement to continue across the joint.
- The divider plate has a top edge, which bounds the top region of the divider plate.
- The top component has at least one bottom edge, which bounds the at least one bottom region.
- In an embodiment, the at least one aperture may be defined by the top edge of the divider plate and the bottom edge of the top component, for example by means of a groove in the divider plate extending from the top edge of the divider plate, and/or a groove in the top component extending from the bottom edge of the top component.
- According to a second aspect of the present invention there is provided a method for forming a joint in a concrete floor according to
claim 13. - According to the invention, step (i) comprises the steps of:
- (i-a) placing the elongate divider plate on an upper deck surface; and
- (i-b) connecting the top component to the top region of the divider plate.
- Where at least one aperture is provided in the divider plate and/or in the top component or by a combination of the divider plate and the top component, which aperture is adapted to allow a connector to extend therethrough between the first and second sides of the apparatus, advantageously, at least one connector may be placed in the at least one aperture provided in the divider plate and/or in the top component or by a combination of the divider plate and the top component. The connector may be placed in the aperture before step (i-a), between steps (i-a) and (i-b), between steps (i-b) and (ii), or after step (ii).
- In an embodiment where at least one aperture is defined by the junction between the divider plate and the top component, as described for the first aspect of the invention above, advantageously the connector may be placed in the aperture between steps (i-a) and (i-b). For example, when producing a floor of reinforced concrete, it is possible to set up the elongate divider plate, place a mesh over the divider plate, and subsequently position the top component such that the bars of the mesh sit in the apertures defined by the junction between the divider plate and the top component. This arrangement therefore significantly improves the ease of producing a concrete floor.
- Throughout this specification, unless expressly stated otherwise, the term "substantially parallel" is to be understood as being at an angle of less than 20° away from true parallel. In an embodiment, this is less than 19°, less than 18°, less than 17°, less than 16°, less than 15°, less than 14°, less than 13°, less than 12°, less than 11°, less than 10°, less than 9°, less than 8°, less than 7°, less than 6°, less than 5°, less than 4°, less than 3°, less than 2°, or less than 1° away from true parallel. Any angle away from true parallel can be to either side of true parallel.
- Throughout the description and claims of this specification, the words "comprise" and "contain" and variations of the words, for example "comprising" and "comprises", mean "including but not limited to", and do not exclude other moieties, additives, components, integers or steps. Moreover the singular encompasses the plural unless the context otherwise requires: in particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise.
- Where upper and lower limits are quoted for a property, then a range of values defined by a combination of any of the upper limits with any of the lower limits may also be implied.
- Embodiments of the present invention will now be further described with reference to the accompanying figures, of which:
-
Figure 1 shows a perspective view of an apparatus which is not according to the invention. -
Figure 2 shows the apparatus ofFigure 1 after concrete has been cast on one side of the apparatus. -
Figure 3 shows a perspective view of an apparatus which is not according to the invention. -
Figure 4 shows the apparatus ofFigure 3 after concrete has been cast on one side of the apparatus. -
Figure 5 shows a perspective view of a first embodiment of the apparatus according to the first aspect of the invention. -
Figure 6 shows the embodiment ofFigure 5 after concrete has been cast on one side of the apparatus. -
Figure 7 shows a perspective view of a second embodiment of the apparatus according to the first aspect of the invention. -
Figure 8 shows the embodiment ofFigure 7 after concrete has been cast on one side of the apparatus. -
Figure 9 shows an area cross-sectional view of the embodiment ofFigure 5 perpendicular to its length. -
Figure 10 shows an area cross-sectional view of the embodiment ofFigure 5 perpendicular to its length, with the top member moved further down relative to the divider plate than inFigure 9 . -
Figure 11 shows an area cross-sectional view of the embodiment ofFigure 5 perpendicular to its length after concrete has been cast on one side of the apparatus. -
Figure 12 shows an area cross-sectional view of the embodiment ofFigure 5 perpendicular to its length after concrete has been cast on both sides of the apparatus. -
Figure 13 shows an area cross-sectional view of the embodiment ofFigure 5 perpendicular to its length after concrete has been cast on both sides of the apparatus where the concrete is reinforced with a steel mesh. -
Figure 14 shows an area cross-sectional view of a third embodiment of the apparatus according to the first aspect of the invention. -
Figure 15 shows a side view of the embodiment ofFigure 5 along its length. - As shown in
Figures 5-15 , theapparatus 1 broadly comprises adivider plate 2 and atop member - The
divider plate 2 is an elongate flat section of steel. - In the embodiments shown in
Figures 5 ,6 and9-15 , thedivider plate 2 comprisesapertures 4 along its length at regular intervals. Theapertures 4 are adapted to receive dowel bars 5. - The dowel bars 5 are made of steel and have surface profiling to improve engagement with the concrete in use.
- The
top member - In the embodiments shown in
Figures 5-13 and15 , thetop member elongate side walls 6a, 6b defining asocket 7 between them. Each of the two side walls has aflange 8a, 8b which extends from the side wall and which, in use, extends into the area where concrete is poured. Theflange 8a, 8b can therefore engage with the concrete, helping to lock theapparatus 1 in position. Eachflange 8a, 8b can comprise a plurality of holes 9. These holes 9 allow the elongate concrete-engagement member 8a, 8b to become more strongly embedded in the concrete. - In another embodiment, shown in
Figure 14 , thetop member 3C comprise oneelongate side wall 6, which has a flange 8 with which extends from theside wall 6 and which, in use, extends into the area where concrete is poured. This results in atop member 3C with a substantially L-shaped cross-section. The flange 8 comprises a plurality of holes 9, which allow the flange 8 to become more strongly embedded in the concrete. - In the embodiments shown in
Figures 7 and8 ,apertures 10 are provided by a combination of thedivider plate 2 and thetop member 3B. The bottom region of thetop member 3B overlaps with the top region of thedivider plate 2.Apertures 10 are defined since the regions do not overlap along their entire lengths. In the embodiments shown inFigures 7 and8 , the bottom region of thetop member 3B is castellated, so that thetop member 3B does not overlap with the entire top region of thedivider plate 2;apertures 10 are left between the points of overlap. In other words, theapertures 10 are defined by the top edge of thedivider plate 2 and the bottom edge of thetop member 3B, by means of regular grooves 11 in thetop member 3B extending from the bottom edge of thetop member 3B. - This arrangement, where the
apertures 10 are provided by a combination of thedivider plate 2 and thetop member 3B, are especially suited for use with a mesh, such as asteel mesh 12 of the type which is commonly used inside reinforced concrete, as shown inFigures 7 and8 . - In the embodiments shown in
Figures 5-8 and15 , the bottom region of thedivider plate 2 comprises more than one indentation for engaging an undulating surface. Such a surface may, for example, be acorrugated steel sheet 13. The shape of the bottom region of thedivider plate 2 allows the bottom edge of thedivider plate 2 to mate with the corrugations of thecorrugated steel sheet 13. - In use, the
divider plate 2 is placed on an upper deck surface which lies across the steel beams of a steel frame building; this surface can be formed bycorrugated steel sheets 13 as shown inFigures 5-8 . - The
divider plate 2 can be connected to theupper deck surface 13 by means of one ormore brackets 15. Thebrackets 15 can be connected to thedivider plate 2 and theupper deck surface 13 by means of self-tapping screws (not shown). - Alternatively, the
divider plate 2 may comprise a longitudinal fold or one or more folded-over tabs at the bottom of the divider plate (not shown) for securing thedivider plate 2 to theupper deck surface 13. Such a fold or such tabs allow thedivider plate 2 to be connected to theupper deck surface 13 by means of, for example, self-tapping screws. - In use, the
top member divider plate 2. Thetop member divider plate 2 until the desired height of the apparatus above theupper deck surface 13 is achieved. - Where the
top member socket 7, as shown inFigures 5-13 , thesocket 7 is placed over thedivider plate 2 to the desired distance.Figure 9 shows a situation where thesocket 7 has been placed over thedivider plate 2, andFigure 10 shows a situation where thetop member 3A has been moved further down relative to thedivider 2 plate than inFigure 9 . - The
side walls 6a, 6b surrounding thesocket 7 may function as biasing means which can hold thetop member divider plate 2. Thetop member divider plate 2 by means of self-tapping screws (not shown). - Where the
top member 3C has a substantially L-shaped cross-section, as shown inFigure 14 , it can be connected to thedivider plate 2 by means of self-tapping screws (not shown). - The
top member divider plate 2 in an offset or staggered manner in the direction of the longitudinal axis of theapparatus 1, as shown inFigure 15 . This means that onedivider plate 2 can be connected to twotop members top member divider plate 2 may be connected in such a way that their ends line up in the direction of the longitudinal axis of theapparatus 1, to form a butt joint. - Dowel bars 5 may be used to connect the concrete on each side of the
apparatus 1, and can be positioned throughapertures 4 in thedivider plate 2, as shown inFigures 5 ,6 ,9-14 . In use, the dowel bars 5 are placed through theapertures 4 after concrete has been cast on one side of theapparatus 1, and are therefore help in position withinapertures 4 by the concrete. - The concrete can be plain concrete or reinforced concrete. In the case of reinforced concrete, it may be reinforced with steel fibres or with a
steel mesh 12. The main purpose of the reinforcement is to provide extra tensile strength to the concrete and to control cracking within the concrete as it cures. - When the concrete is reinforced with a
steel mesh 12, the mesh may be placed between thedivider plate 2 and the top member, by using atop member 3B whereapertures 10 are provided by a combination of thedivider plate 2 and thetop member 3B. As shown inFigures 7 and8 , with this arrangement thedivider plate 2 is placed on an upper deck surface, which can be formed bycorrugated steel sheets 13 as shown inFigures 7-8 . Themesh 12 is then placed on top of thedivider plate 2. Thetop member 3B contains regular grooves 11 extending from the bottom edge of thetop member 3B, which can be fitted over the bars in themesh 12, resulting in an apparatus where the bars of themesh 12 pass throughapertures 10 provided by a combination of thedivider plate 2 and thetop member 3B. In such an arrangement,additional dowel bars 5 through for example thedivider plate 2 may also be used (not shown). - The concrete may also be reinforced with a
steel mesh 12 without the mesh passing through theapparatus 1. Such asteel mesh 12 may be used in combination with one ormore dowel bars 5 passing through the apparatus, as shown inFigure 13 . It is envisaged that in use, themesh 12 may be cut on each side of theapparatus 1. In such cases, themesh 12 may be attached to the dowel bars 5 for an improved connection throughout the concrete floor. - The
apparatus 1 will form a tied joint within a concrete floor; it is intended to tie together the concrete on each side of the joint. This is as opposed to, for example, opening up like a "contraction joint" on a ground floor. - After the
apparatus 1 has been set up as described above, theapparatus 1 will bound a space for casting concrete. Concrete is then poured into the space. Concrete is first cast on one side of thedivider plate 2, as shown inFigures 6 ,8 and11 . Where appropriate, dowel bars 5 may then be placed throughapertures 4 in for example thedivider plate 2 into the concrete on the first side. Concrete is then cast on the remaining side of theapparatus 1, as shown inFigures 12 and13 .
Claims (17)
- An apparatus (1) for forming a joint in a concrete floor on an upper floor of a building, the apparatus (1) comprising:(i) an elongate divider plate (2) for dividing first and second volumes of concrete in use on first and second sides of the apparatus (1);wherein the divider plate (2) has a bottom region which comprises more than one indentation for engaging an undulating surface (13) and the shape of the bottom region of the divider plate (2) is such that, in use, it can engage with the corrugations of a corrugated steel sheet (13), wherein parts of the divider plate (2) protrude into the corrugations of the corrugated steel sheet (13) in use,
the apparatus (1) being characterized in that it further comprises:
(ii) an elongate top component (3A, 3B or 3C) discrete from the divider plate and connectable to a top region of the divider plate (2) to extend a height of the divider plate (2) in use. - The apparatus of claim 1, wherein the parts of the divider plate (2) which protrude into the corrugations of the corrugated steel sheet (13) in use follow the contours of the corrugations closely.
- The apparatus of claim 1 or 2, wherein the parts of the divider plate (2) which protrude into the corrugations of the corrugated steel sheet (13) in use leave one or more gaps between the protrusions on the divider plate (2) and the corrugations of the corrugated steel sheet (13).
- The apparatus of claim 1, wherein the shape of the bottom region of the divider plate (2) is such that, in use, it can mate with the corrugations of a corrugated steel sheet (13).
- The apparatus of any one of the preceding claims, wherein the top component (3A, 3B or 3C) is arranged to be movable relative to the divider plate (2).
- The apparatus of any one of the preceding claims, wherein the top component (3A, 3B or 3C) comprises
an elongate side wall (6 or 6a) which, in use, sits parallel and adjacent to a first side of the divider plate (2), and
a flange (8 or 8a) which extends from the side wall (6 or 6a) and which, in use, extends into the area where concrete is poured. - The apparatus of any one of the preceding claims, wherein the top component (3A, 3B or 3C) comprises a top strip and two side walls (6a, 6b) defining a socket (7) between them.
- The apparatus of any one of the preceding claims, wherein the apparatus further comprises:
at least one aperture (4 or 10) provided in the divider plate (2) and/or in the top component (3A, 3B or 3C) or by a combination of the divider plate (2) and the top component (3A, 3B or 3C), which aperture (4 or 10) is adapted to allow a connector (5 or 12) to extend therethrough between the first and second sides of the apparatus (1). - The apparatus of claim 8, wherein at least one aperture (4) is provided in the divider plate (2).
- The apparatus of claim 8 or 9, wherein at least one aperture (10) is defined by the junction between the divider plate (2) and the top component (3A, 3B or 3C).
- The apparatus of claim 10, wherein the divider plate (2) has a top region and the top component (3A, 3B or 3C) has at least one bottom region, which regions overlap and are shaped such that the at least one aperture (10) is defined between points of overlap.
- The apparatus of claim 11, wherein the divider plate (2) has a top edge which bounds the top region of the divider plate (2), and the top component (3A, 3B or 3C) has at least one bottom edge which bounds the at least one bottom region, and wherein the at least one aperture (10) is defined by the top edge of the divider plate (2) and the bottom edge of the top component (3A, 3B or 3C) by means of a groove in the divider plate (2) extending from the top edge of the divider plate (2), and/or a groove (11) in the top component (3B) extending from the bottom edge of the top component (3B).
- A method for forming a joint in a concrete floor on an upper floor of a building, comprising the steps of:(i) setting up the apparatus (1) according to any one of claims 1-12 to bound a space for casting concrete; and(ii) casting concrete in the spacewherein in step (i), the divider plate (2) and the top component (3A, 3B or 3C) are combined to form the apparatus (1) by connecting the top component (3A, 3B or 3C) to the top region of the divider plate (2).
- The method of claim 13, wherein in step (i) the top component (3A, 3B or 3C) is connected along the top region of the divider plate (2).
- The method of claim 14, wherein the top component has at least one bottom region, and in step (i) the top component (3A, 3B or 3C) is connected along the top region of the divider plate (2) such that the bottom region of the top component overlaps at least partially with the top region of the divider plate.
- The method of any one of claims 13 to 15, wherein the apparatus is set up on a corrugated sheet.
- The method of any one of claims 13 to 16, wherein step (i) comprises the steps of:(i-a) placing the elongate divider plate (2) on a corrugated sheet; and(i-b) connecting the top component (3A, 3B or 3C) to the top region of the divider plate (2).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1416729.0A GB2530344A (en) | 2014-09-22 | 2014-09-22 | Apparatus |
Publications (2)
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EP2998455A1 EP2998455A1 (en) | 2016-03-23 |
EP2998455B1 true EP2998455B1 (en) | 2020-05-06 |
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EP15185955.0A Active EP2998455B1 (en) | 2014-09-22 | 2015-09-18 | Apparatus |
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EP (1) | EP2998455B1 (en) |
ES (1) | ES2808901T3 (en) |
GB (1) | GB2530344A (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10077551B2 (en) | 2015-10-05 | 2018-09-18 | Illinois Tool Works Inc. | Joint edge assembly and method for forming joint in offset position |
US10119281B2 (en) | 2016-05-09 | 2018-11-06 | Illinois Tool Works Inc. | Joint edge assembly and formwork for forming a joint, and method for forming a joint |
CN106065563B (en) * | 2016-08-04 | 2019-02-12 | 河北省交通规划设计院 | A kind of embedded anti-shearing connection member and its forming method |
AU2018226390A1 (en) | 2017-10-13 | 2019-05-02 | Illinois Tool Works Inc. | Edge protection system having retaining clip |
AU2018226389A1 (en) | 2017-10-13 | 2019-05-02 | Illinois Tool Works Inc. | Edge protection system having bridging pins |
AU2018226394A1 (en) | 2017-10-13 | 2019-05-02 | Illinois Tool Works Inc. | Edge protection system having clip retainment |
AU2018226393A1 (en) | 2017-10-13 | 2019-05-02 | Illinois Tool Works Inc. | Edge protection system with intersection module |
AU2018226391A1 (en) | 2017-10-13 | 2019-05-02 | Illinois Tool Works Inc. | Edge protection system having support foot |
AU2018226392A1 (en) | 2017-10-13 | 2019-05-02 | Illinois Tool Works Inc. | Edge protection system having dowel plate |
AU2019264633A1 (en) | 2018-11-19 | 2020-06-04 | Illinois Tool Works Inc. | Support bracket |
CN111287380A (en) * | 2020-03-10 | 2020-06-16 | 郭伍常 | Metal composite filling box with concrete bottom plate |
CN113789870B (en) * | 2021-08-23 | 2022-09-16 | 华汇建设集团有限公司 | Construction method for expansion joint of floor of integral building |
CN114150874A (en) * | 2021-12-06 | 2022-03-08 | 中建新越建设工程有限公司 | Ground standardized construction device and construction method thereof |
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US1324360A (en) * | 1919-12-09 | Spacer fob | ||
US1826062A (en) * | 1930-01-23 | 1931-10-06 | Roscoe D Farmer | Joint form for paving |
US2138817A (en) * | 1934-01-10 | 1938-12-06 | Cal C Chambers | Road joint |
US2885939A (en) * | 1957-07-26 | 1959-05-12 | Dave M Bartholow | Screed expansion joint |
DE3424198A1 (en) * | 1983-10-14 | 1985-04-25 | Helmut 4407 Emsdetten Wedi | Two-part settlement-joint moulding for screeds |
JP2622621B2 (en) * | 1990-10-18 | 1997-06-18 | 晃 室星 | Joining frame and joining method of concrete floor |
GB0218386D0 (en) * | 2002-08-08 | 2002-09-18 | Kelly David C J | Shuttering |
ATE352672T1 (en) * | 2002-08-16 | 2007-02-15 | Permaban Ltd | CONCRETE FLOOR SLAB |
DE202006011885U1 (en) * | 2006-08-01 | 2006-10-26 | Tiletschke, Lothar | Joint stop end panel for e.g. base slab, has base bar provided with insertion holes that are arranged at a distance to one another, and retaining profiles inserted into insertion holes, where profiles are bend at end turned away from bar |
EP2365150B3 (en) * | 2010-03-03 | 2020-09-16 | KFIP Limited | Lost Shuttering |
US20120124929A1 (en) * | 2010-11-22 | 2012-05-24 | O'connor Paul Allison | Concrete armored joint form that provides one step installation and thermal transfer prevention as well as seating for joint filler |
US20140020320A1 (en) * | 2012-07-18 | 2014-01-23 | Nigel K. Parkes | Leave-in-Place Concrete Formwork Combining Plate Dowels, Divider Plates, and/or Finishing, Armoring and/or Sealing Molding |
-
2014
- 2014-09-22 GB GB1416729.0A patent/GB2530344A/en not_active Withdrawn
-
2015
- 2015-09-18 ES ES15185955T patent/ES2808901T3/en active Active
- 2015-09-18 EP EP15185955.0A patent/EP2998455B1/en active Active
Non-Patent Citations (1)
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EP2998455A1 (en) | 2016-03-23 |
GB201416729D0 (en) | 2014-11-05 |
ES2808901T3 (en) | 2021-03-02 |
GB2530344A (en) | 2016-03-23 |
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