EP4158119A1 - Structural thermal break connector - Google Patents

Structural thermal break connector

Info

Publication number
EP4158119A1
EP4158119A1 EP21736005.6A EP21736005A EP4158119A1 EP 4158119 A1 EP4158119 A1 EP 4158119A1 EP 21736005 A EP21736005 A EP 21736005A EP 4158119 A1 EP4158119 A1 EP 4158119A1
Authority
EP
European Patent Office
Prior art keywords
insulation assembly
anchor
thermal insulation
connector
thermal break
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.)
Pending
Application number
EP21736005.6A
Other languages
German (de)
French (fr)
Inventor
Oliver FARRELL
Atilla Akarcay
Paul Fleming
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Farrat Isolevel Ltd
Original Assignee
Farrat Isolevel Ltd
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
Application filed by Farrat Isolevel Ltd filed Critical Farrat Isolevel Ltd
Publication of EP4158119A1 publication Critical patent/EP4158119A1/en
Pending legal-status Critical Current

Links

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
    • E04B1/003—Balconies; Decks
    • E04B1/0038—Anchoring devices specially adapted therefor with means for preventing cold bridging
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
    • 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
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165—Coaxial connection by means of sleeves

Definitions

  • the merlons of the upper portion may have any shape to correspond to the embrasures or crenels or depressions of the lower portion.
  • the embrasures or crenels or depressions of the upper portion are preferably arcuate or part circular to correspond to the merlons of the lower portion.
  • Each of the shear bars will preferably be elongate.
  • Each of the shear bars will preferably be planar.
  • any one or more of the anchors and/or clamp plates and/or shear bars may be formed of a structurally capable non-metallic material instead of metal.
  • one or more fibre reinforced plastic or polymeric materials may be used.
  • Figure 6 is a schematic front installed view of a shear bar cover portion as illustrated in Figure 5.
  • each of the clamp plates 14 will preferably be manufactured from a metal material.
  • the metal may be treated for example using a process such as galvanic treatment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Building Environments (AREA)

Abstract

A structural thermal break connector to connect a pair of concrete slabs relative to one another and thermally isolating the pair of concrete slabs from one another, the connector comprising an elongate thermal insulation assembly (11) between the pair of concrete slabs, the elongate insulation assembly (11) including a lower portion (12) of high compressive resistance and low thermal conductivity, and an upper portion (13) of lesser density than the at least one lower portion and low thermal conductivity, a plurality of pairs of clamp plates (14), one of each pair on each lateral side of the thermal insulation assembly (11) and spanning a portion of both of the lower portion (12) and the upper portion (13), and a plurality of anchor bars, an upper row of main anchor bars (15) and a lower row of bottom anchor bars (16) extending from each lateral side of the thermal insulation assembly (11) to anchor the connector (10) between the pair of concrete slabs.

Description

STRUCTURAL THERMAL BREAK CONNECTOR
Technical Field of the Invention
The present invention relates generally to the building field. In particular, but not exclusively, the invention concerns a structural thermal break connector, particularly for inclusion in reinforced concrete connections such as a concrete cantilever balcony connection to a main structural concrete slab.
Background to the Invention
In situations where a pair of concrete slabs are positioned edge to edge, a series of problems can be encountered if the slab edges are exposed. Exposed slab edges can create a thermal bridge between the two slabs. If one of the slabs is located outside the insulated zone of the building, then heat is conducted away from the interior slab and into the exterior environment.
This has an impact in terms of cost and environmental impact of wasted energy. Further, condensation can form in interior cavities resulting in mould growth which can in turn lead to respiratory problems for users of the building. Still further, there is discomfort of users due to cold interior surfaces.
Conventional thermal break connectors insulate the interior floor slab from the exterior exposed slab edge while transferring the loads imposed on the exposed slab edge back to the interior floor slab.
However, due to the provision of the conventional thermal break connectors, the connection between the two slabs also creates a weak point. The provision of a connector can lead to ‘bounce’, particular in the part of an external slab that is cantilevered to an internal or supported slab, such as is the case in the connection of a balcony slab relative to an internal floor slab.
An example of a conventional structural thermal break connector for concrete slab edges and balconies is described in US Patent No. 8,973,317. US8,973,317 describes a relatively thin flat panel of thermal insulating material provided with an array of holes or apertures, each coaxially aligned or coextensive with a reinforcement bar emanating from a concrete slab forming an interior floor within a structure consistent with the design of a structural engineer of record. Rebar couplers (nipples) are arranged within each of the holes or apertures of the insulating panel having axial lengths greater than the thickness of the panel to extend beyond the panel on both sides thereof. The couplers are threaded both internally and externally. Nuts or threaded washers are threaded and tightened on both sides of each coupler to secure the coupler in place in relation to the panel.
Embodiments of the invention seek to at least partially overcome or ameliorate any one or more of the abovementioned disadvantages or provide the consumer with a useful or commercial choice.
Summary of the Invention
According to a first aspect of the invention there is provided a structural thermal break connector to connect a pair of concrete slabs relative to one another and thermally isolating the pair of concrete slabs from one another, the connector comprising:
1. An elongate thermal insulation assembly between the pair of concrete slabs, the elongate thermal insulation assembly including at least one lower portion of high compressive resistance and low thermal conductivity; and
2. A plurality of anchor bars extending from each lateral side of the thermal insulation assembly to anchor the connector between the pair of concrete slabs.
According to a second aspect of the invention there is provided a structural thermal break connector to connect a pair of concrete slabs relative to one another and thermally isolating the pair of concrete slabs from one another, the connector comprising:
3. An elongate thermal insulation assembly between the pair of concrete slabs, the elongate thermal insulation assembly including: a. At least one lower portion of high compressive resistance and low thermal conductivity; and b. At least one upper portion of lesser density than the at least one lower portion and low thermal conductivity; 4. A plurality of clamp plates located on a lateral side of the thermal insulation assembly and spanning a portion of both of the at least one lower portion and the at least one upper portion; and
5. A plurality of anchor bars extending from each lateral side of the thermal insulation assembly to anchor the connector between the pair of concrete slabs.
Providing a connector with an elongate insulation assembly including at least one lower portion of high compressive resistance and low thermal conductivity; and at least one upper portion of lesser density than the at least one lower portion and low thermal conductivity, enables a stiffer connection to be formed between the pair of concrete slabs with less bounce, particularly in relation to a concrete cantilever balcony slab connection to a main structural concrete slab.
The thermal insulation assembly will preferably be elongate. The thermal insulation assembly will preferably span the length of at least one of the concrete slabs. Preferably, the thermal insulation assembly will be continuous between the pair of concrete slabs. The thermal insulation assembly may be discontinuous between the pair of concrete slabs.
The thermal insulation assembly will preferably be substantially planar. The thermal insulation assembly will typically have at least one upper portion and at least one lower portion. The at least one upper portion and the at least one lower portion will preferably be coplanar. When assembled correctly, the thermal insulation assembly will preferably have a three-dimensional rectangular prism shape.
Preferably, the or each at least one upper portion and the or each at least one lower portion will preferably have the same thickness. However, the at least one upper portion, being of lesser density than the at least one lower portion, may be provided at an increased thickness and then compressed between the pair of concrete slabs to approximate the thickness of the at least one lower portion.
Typically, the or each at least one upper portion and the or each at least one lower portion will preferably be the same length. Each at least one upper portion and each at least one lower portion will preferably have low thermal conductivity. Each will typically be a heat insulative material.
The clamp plates and anchor bars will typically connect to or relative to the thermal insulation assembly but will preferably not connect through the thermal insulation assembly, nor typically will they abut one another through the thermal insulation assembly, in order to minimise any thermal transfer across the thermal insulation assembly.
The elongate insulation assembly of the present invention preferably includes at least one lower portion of high compressive resistance and low thermal conductivity. As mentioned above, the at least one lower portion is preferably planar. The or each at least one lower portion will preferably include an upper edge which corresponds in shape to a lower edge of the at least one upper portion. The provision of a shaped upper edge on the at least one lower portion which corresponds in shape to a shaped lower edge of the at least one upper portion will typically act to minimise or prevent lateral movement or slippage between the at least one lower portion and the at least one upper portion.
Preferably, the upper edge of the at least one lower portion will include at least one portion extending upwardly beyond the upper edge of at least one other portion of the upper edge. Typically, the upper edge of the at least one lower portion will have a crenelated shape. A preferred crenelated shape includes a series of upwardly extending portions or merlons spaced apart by one of a series of embrasures or crenels or depressions.
Preferably, the merlons are each arcuate or part circular. The embrasures or crenels or depressions may have any shape.
At least one opening may be preferably formed in a part of the at least one lower portion to allow connection of one or more bottom anchor bars relative thereto. Typically, a number of openings are provided in the at least one lower portion. Typically, the openings are equally spaced over the length of the at least one lower portion. An opening may preferably be formed through each of the merlons. Preferably, any such opening is provided approximately centrally through the merlon to ensure that sufficient material of the at least one lower portion remains in place about the opening so that the opening does not form a weak point in the at least one lower portion.
The at least one lower portion is preferably formed of one or more materials having high compressive resistance and low thermal conductivity. One or more plastic or polymeric materials is preferred. One or more of the materials used may include fibres for increased strength. Glass fibre reinforced plastic or polymeric materials tend to exhibit higher compressive resistance than the same, unreinforced material. One or more of the materials used may include one or more fillers for enhanced properties.
The one or more materials used to form the at least one lower portion may include any one or more of polybutylene succinate, acetyl copolymer, polyamide- imide, polyamide, polyether ketone (PEK), polyether ether ketone (PEEK), poly (phenylene sulphide) and/or polybenzimidazol. A material such as polybenzimidazol is particularly preferred as this material typically exhibits one of the highest, if not the highest compressive strength of any unfilled plastic material. A mineral wool derivative material could be used.
Typically, the or each material used is semi-crystalline. Typically, the or each material used is flexible. Typically, the or each material used is chemical resistant.
The elongate insulation assembly preferably includes at least one upper portion of lesser density than the at least one lower portion, as well as low thermal conductivity. As mentioned above, the at least one upper portion is preferably planar. The at least one upper portion will preferably include a lower edge which corresponds in shape to an upper edge of the at least one lower portion. The provision of a shaped lower edge on the at least one upper portion, which corresponds in shape to a shaped upper edge of the at least one lower portion, will typically act to minimise or prevent lateral movement or slippage between the at least one lower portion and the at least one upper portion.
Preferably, the lower edge of the at least one upper portion will include at least one portion extending further downwardly beyond the lower edge of at least one other portion of the lower edge. Typically, the lower edge of the at least one upper portion will have a crenelated shape. A preferred crenelated shape includes a series of downwardly extending portions or merlons spaced apart by one of a series of embrasures or crenels or upwardly extending depressions.
Preferably, the merlons of the upper portion may have any shape to correspond to the embrasures or crenels or depressions of the lower portion. The embrasures or crenels or depressions of the upper portion are preferably arcuate or part circular to correspond to the merlons of the lower portion.
Preferably, the merlons in the at least one lower portion and the embrasures or crenels or upwardly extending depressions in the at least one upper portion correspond to one another and the merlons in the at least one upper portion and the embrasures or crenels or depressions in the at least one lower portion correspond to one another.
At least one opening may preferably be formed in a part of the at least one upper portion to allow connection of one or more main anchor bars relative thereto. Typically, a number of openings are provided in the at least one upper portion. Typically, the openings are equally spaced over the length of the at least one upper portion.
At least one opening may preferably be formed in the at least one upper portion spaced from the lower edge. Preferably, any such opening is provided aligned with an opening provided through the merlon in the at least one lower portion. The opening formed in the at least one upper portion is preferably vertically aligned with an opening provided through the merlon in the at least one lower portion. Typically, the opening(s) in the at least one upper portion are spaced from an upper edge of the merlons in the at least one lower portion.
The at least one upper portion is preferably formed of one or more materials having lower density than the material(s) used in the at least one lower portion but also having low thermal conductivity. A mineral wool derivative material and/or one or more plastic or polymeric materials is preferred.
The one or more materials used to form the at least one upper portion will preferably be or include one or more polyurethane materials. Typically, the or each material used is flexible. Typically, the or each material used is chemical resistant. Typically, the or each material used may be compressible. Typically, the or each material used may be resiliently deformable.
The at least one upper portion is typically attached relative to the at least one lower portion in use, by the plurality of clamp plates. When the at least one upper portion and at least one lower portion are attached together, they typically form a substantially planar, rectangular three-dimensional thermal insulation assembly located between the slabs.
The connector of the present invention preferably includes a plurality clamp plates located on a lateral side of the thermal insulation assembly and spanning a portion of both of the at least one lower portion and at least one upper portion of the elongate insulation assembly.
Each of the clamp plates will preferably be manufactured from metal material. The metal may be treated for example using a process such as galvanic treatment.
Each of the clamp plates will preferably be elongate. Each of the clamp plates will preferably be planar. The clamp plates may have any shape.
Preferably an opening is provided at an upper end in each clamp plate to allow connection of a main anchor bar. The upper opening will preferably allow the mounting of the clamp plate relative to the at least one upper portion. Preferably an opening is provided at a lower end in each clamp plate to allow connection of a bottom anchor bar. The lower opening will preferably allow the mounting of the clamp plate relative to the at least one lower portion.
At least one of the clamp plates will preferably mount at least one shear bar. A central opening may be provided to allow a shear bar to be connected relative to the clamp plate (and/or relative to the elongate thermal insulation assembly). Typically, a main anchor bar, a bottom anchor bar and a shear bar will preferably be provided relative to each of the clamp plates. Typically, the main anchor bar, bottom anchor bar and shear bar of each clamp plate will extend to one side of the elongate thermal insulation assembly. Preferably, a clamp plate, a main anchor bar bottom anchor bar and shear bar will be provided on both sides of the elongate thermal insulation assembly, preferably substantially aligned.
Normally, the opening provided at an upper end of each clamp plate will overlie a portion of the at least one upper portion of the elongate insulation assembly. Preferably, the opening provided at a lower end of each clamp plate will overlie a portion of the at least one lower portion of the elongate insulation assembly.
An attachment mechanism or device may be associated with each of the openings provided at the upper end of each clamp plate to attach the main anchor bar relative to the clamp plate. An attachment mechanism or device may be associated with each of the openings provided at the lower end of each clamp plate to attach the bottom anchor bar relative to the clamp plate.
Although any attachment mechanism or device may be used provided that the attachment mechanism or device allows attachment of the main anchor bar and/or bottom anchor bar, an internally threaded nut is preferred as this allows the attachment of a threaded portion of the main anchor bar and/or bottom anchor bar respectively.
The connector of the present invention preferably includes a plurality of anchor bars extending from each lateral side of the thermal insulation assembly to anchor the connector between a pair of concrete slabs. In use, a portion of at least some of the anchor bars extending from each lateral side of the thermal insulation assembly will typically engage with a reinforcing assembly provided internally of at least one, and preferably both of the concrete slabs. In the situation where the connector is used to thermally isolate a balcony slab from the main slab, the anchor bars located on one lateral side of the thermal insulation assembly will typically engage with the preferred reinforcing assembly provided internally of the main slab and the anchor bars located on the opposite lateral side of the thermal insulation assembly will typically engage with the preferred reinforcing assembly provided internally of the balcony slab.
Each of the anchor bars will preferably be manufactured from metal material. The metal may be treated for example using a process such as galvanic treatment.
The configuration of the anchor bars relative to the elongate thermal insulation assembly may vary. For example, the configuration of anchor bars provided on one side of the elongate thermal insulation assembly may vary from the configuration provided on the opposite side. A further example is where the configuration of the anchor bars provided relative to the at least one upper portion differs from the configuration of anchor bars provided relative to the at least one lower portion of the thermal insulation assembly.
In an embodiment, a number of anchor bars are preferably provided relative to the at least one upper portion and are preferably designated as main anchor bars. A number of anchor bars are preferably provided relative to the at least one lower portion and are preferably designated as bottom anchor bars.
Although the anchor bars may have any cross-sectional shape, circular cross- sectional shape is preferred. Typically, the anchor bars will be configured as reinforcing bars.
Each of the anchor bars will preferably be elongate. The anchor bars may be of different lengths. For example, the main anchor bars may be longer than the bottom anchor bars. The anchor bars on one lateral side of the thermal insulation assembly may be longer than the anchor bars on the opposite lateral side of the thermal insulation assembly.
The anchor bars may be of different cross-sectional dimensions. For example, the main anchor bars may be larger in cross-sectional area than the bottom anchor bars. This greater cross-sectional area of the main anchor bars
At least a portion of the anchor bars is preferably configured to allow attachment of the anchor bars relative to the elongate thermal insulation assembly. Although any appropriate attachment mechanism may be used, one simple mechanism that may be used is to provide a portion of each of the anchor bars with an externally threaded portion to engage with a preferred internally threaded portion or nut provided relative to the elongate thermal insulation assembly and/or a clamp plate.
An anchor plate or assembly may be provided at an outer end of any one or more of the anchor bars. Preferably, the anchor plate or assembly is provided with an opening with an internally threaded portion to engage a preferably externally threaded portion of at least one anchor bar. In use, the anchor plate assembly will typically be caged into a reinforcement structure provided internally of a concrete slab. The anchor plate or assembly will preferably be larger radially and/or laterally than the cross- sectional dimension of the anchor bar.
Each anchor bar is preferably elongate and unitary. Preferably, anchor bars are provided in pairs, substantially coaxial with one another and extending from either side of the elongate thermal insulation assembly. Typically, the inner ends of the respective pairs of anchor bars (the ends of the anchor bars which are attached to the elongate thermal insulation assembly) are spaced from one another and/or thermally isolated from one another in order to minimise or prevent heat transfer through the elongate thermal insulation assembly. Each of the pairs of anchor bars are typically attached relative to the elongate thermal insulation assembly.
The main anchor bar will typically be larger, preferably in cross sectional area than the bottom anchor bar. Each main anchor bar may be longer than each bottom anchor bar. In a preferred configuration, the main anchor bar will preferably be M20 Grade 8.8 bar stock and preferably approximately 350 mm in length from the elongate thermal insulation assembly to a free end although the dimension, material, grade and length may vary according to the particular application of the connector. A direct coupler is preferably provided to each main anchor bar.
In a preferred configuration, the bottom anchor bar will preferably be M12 Grade 8.8 bar stock and preferably approximately 350 mm in length from the elongate thermal insulation assembly to a free end although the dimension, material, grade and length may vary according to the particular application of the connector. A direct coupler is preferably provided to each bottom anchor bar.
As mentioned above, the configuration of anchor bars provided on each side of the elongate thermal insulation assembly will typically be matched.
The connector may be provided with one or more shear bars. Preferably, an elongate shear bar is provided relative to each of the clamp plates. Typically, each elongate shear bar will extend relative to the elongate thermal insulation assembly, between the main anchor bar and the bottom anchor bar. Typically, each shear bar will be substantially parallel to and spaced from both the main anchor bar and the bottom anchor bar.
Each of the shear bars will preferably be manufactured from metal material. The metal may be treated, for example using a process such as galvanic treatment.
Each of the shear bars will preferably be elongate. Each of the shear bars will preferably be planar.
In one form, one or more shear bars are preferably provided in order to minimise or prevent the concrete slabs from slipping past one another, particularly in a vertical direction.
In a preferred form, each shear bar will be approximately 50 mm wide x 8 mm in thickness x 450 mm in length, extending from the elongate thermal insulation assembly.
The connector of the present invention may further comprise at least one tubular member located relative to one or more of the shear bars. Typically, where provided, the at least one tubular member is preferably located surrounding the shear bar, receiving at least a portion of the shear bar within the hollow interior of the at least one tubular member.
The at least one tubular member may have one or more shaped ends. The at least one tubular member will typically extend from the clamp plate toward an outer end of the shear bar. The at least one tubular member may be mounted to or attached to the clamp plate. Preferably, the tubular member will contain the entirety of the shear bar internally. The tubular member may be open-ended or close ended. In a preferred form, the tubular member is approximately 33.7 mm in internal diameter and approximately 3 mm in wall thickness. In an embodiment, the at least one tubular member may be annular in cross-sectional shape.
The connector may further comprise a shear bar cover. Preferably, the shear bar cover may function to thermally shroud the shear bar to minimise or prevent thermal transfer through the elongate thermal insulation assembly. Where provided, the shear bar cover will preferably be formed of one or more materials of low thermal conductivity. The shear bar cover is preferably continuous about the shear bar, preferably on both sides of the elongate thermal insulation assembly.
The shear bar cover may have any configuration. For example, the shear bar cover may be configured as an elongate tube of any external shape, with a central bore corresponding in shape to the shear bar, that can be slipped longitudinally over the shear bar.
Alternatively, the shear bar cover may be a multi-part cover which is assembled about the shear bar to mount relative thereto. A pair of elongate shear bar cover portions may be provided, each of which is preferably L-shaped in cross-sectional shape. The shear bar cover portions can then be positioned relative to one another to form an elongate rectangular tube with a central bore corresponding in shape to the shear bar and attached together.
The outer, free end of the shear bar cover may be closed or open. Where the shear bar cover is provided in more than one part, an end portion of the shear bar cover may be attached to either of the cover portions or attached to the elongate rectangular tube after the cover portions have been attached to one another.
Any one or more of the anchors and/or clamp plates and/or shear bars may be formed of a structurally capable non-metallic material instead of metal. For example, one or more fibre reinforced plastic or polymeric materials may be used.
Detailed Description of the Invention
In order that the invention may be more clearly understood one or more embodiments thereof will now be described, by way of example only, with reference to the accompanying drawings, of which:
Figure 1 is an isometric view of a structural thermal break connector according to an embodiment of the invention.
Figure 2 is an isometric view of a structural thermal break connector according to another embodiment of the invention with circular hollow section surrounding the shear bars on one side but not shown on the opposite side for clarity.
Figure 3 is a front view of a clamp plate from the structural thermal break connector illustrated in Figure 1. Figure 4 is a front view of a clamp plate from the structural thermal break connector illustrated in Figure 2.
Figure 5 is a schematic front exploded view of a shear bar and cover according to an embodiment of the invention.
Figure 6 is a schematic front installed view of a shear bar cover portion as illustrated in Figure 5.
With reference to the accompanying figures, a structural thermal break connector 10 is provided to connect a pair of concrete slabs relative to one another and thermally isolating the pair of concrete slabs from one another. The connector 10 illustrated in the Figures each comprises: 1. An elongate thermal insulation assembly 11 between the pair of concrete slabs (not shown for clarity), the elongate insulation assembly 11 including: a. a lower portion 12 of high compressive resistance and low thermal conductivity; and b. an upper portion 13 of lesser density than the at least one lower portion and low thermal conductivity;
2. A plurality of clamp plates 14 on a lateral side of the thermal insulation assembly 11 and spanning a portion of both of the lower portion 12 and the upper portion 13; and 3. A plurality of anchor bars, an upper row of main anchor bars 15 and a lower row of bottom anchor bars 16 extending from each lateral side of the thermal insulation assembly 11 to anchor the connector 10 between the pair of concrete slabs.
The reverse side of the connector 10 illustrated in Figures 1 and 2 is a mirror image of the configuration illustrated in those figures. The thermal insulation assembly 11 illustrated is elongate, preferably spanning the length of at least one of the concrete slabs. As shown, the thermal insulation assembly 11 is continuous between the pair of concrete slabs.
The thermal insulation assembly 11 shown in Figures 1 and 2 is substantially planar. The upper portion 13 and the lower portion 12 are coplanar. According to the illustrated embodiments, when assembled correctly, the thermal insulation assembly 11 has a three-dimensional rectangular prism shape.
Preferably, the upper portion 13 and the lower portion 12 are of the same thickness. Typically, the upper portion 13 and the lower portion 12 are the same length.
The clamp plates 14, main anchor bars 15 and bottom anchor bars 15 typically connect to or relative to the thermal insulation assembly 11 but will preferably not connect through the thermal insulation assembly 11 nor abut through the thermal insulation assembly 11, in order to minimise any heat transfer across the thermal insulation assembly 11.
As illustrated, although obscured in Figures 1 and 2, the lower portion 12 of the thermal insulation assembly 11 includes an upper edge which corresponds in shape to a lower edge of the upper portion 13 of the thermal insulation assembly 11. The provision of a shaped upper edge on the lower portion 12 which corresponds in shape to a shaped lower edge of the upper portion 13 will typically act to minimise or prevent lateral movement or slippage between the lower portion 12 and the upper portion 13 allowing the provision of different, separate upper and lower portions, with differing properties, but to minimise slippage between the separate upper and lower portions.
As shown in the embodiments illustrated in Figures 1 and 2, the upper edge of the lower portion has a crenellated shape including a series of upwardly extending portions or merlons 17 spaced apart by one of a series of embrasures or crenelles or depressions (obscured by shear bar 18).
The merlons 17 illustrated are each arcuate or part circular whilst the embrasures or crenelles or depressions may have any shape but extend upward a lesser distance than the merlons 17. An opening may be formed in a part of the lower portion 12 to allow connection of a bottom anchor bar 16 relative thereto. Typically, a number of openings are provided in the lower portion 12, substantially equally spaced over the length of the lower portion 12.
An opening is preferably formed through each of the merlons 17. Preferably, any such opening is provided approximately centrally through the merlon 17 to ensure that sufficient material of the lower portion 12 remains in place about the opening so that the opening does not form a weak point in the lower portion 12.
The lower portion 12 is preferably formed of one or more materials having high compressive resistance and low thermal conductivity. One or more plastic or polymeric materials is preferred. One or more of the materials used may include fibres for increased strength. Glass fibre reinforced plastic or polymeric materials tend to exhibit higher compressive resistance. One or more of the materials used may include one or more fillers for enhanced properties.
Although any one or more of a variety of materials could be used, a material such as polybenzimidazol is particularly preferred as this material typically exhibits the highest compressive strength of any unfilled plastic material.
As shown, the upper portion 13 will preferably include a lower edge which corresponds in shape to the upper edge of the lower portion 12.
Preferably, the lower edge of the upper portion 13 will have a crenellated shape also, corresponding to the preferred crenelated shape of the upper edge of the lower portion 13. A preferred crenellated shape includes a series of downwardly extending merlons spaced apart by one of a series of embrasures or crenelles or upwardly extending depressions. The merlons of the upper portion 13 are configured to correspond to the embrasures or crenelles or depressions of the lower portion 12 and the embrasures or crenelles or depressions of the upper portion 13 are configured to correspond the merlons of the lower portion 12.
An opening may be formed in a part of the upper portion 13 to allow connection of the main anchor bar 15 relative thereto. As shown, a number of openings are provided in the upper portion 13, typically, equally spaced over the length of the upper portion 13.
Each opening is preferably formed in the upper portion 13 spaced from the lower edge and the upper edge of the upper portion. As illustrated in Figures 1 and 2, each opening in the upper portion 13 is provided aligned with an opening provided through the merlon 17 in the lower portion 12. Typically, the opening(s) in the upper portion 13 are spaced from an upper edge of the merlons 17 in the lower portion 12.
The upper portion 13 is preferably formed of one or more materials having lower density than the material(s) used in the at least one lower portion but also having low thermal conductivity. One or more plastic or polymeric materials is preferred and one or more polyurethane material is particularly preferred.
As illustrated, the upper portion 13 is typically attached relative to the lower portion 12 in use, by the plurality of clamp plates 14. When the upper portion 13 and lower portion 12 are attached together, they typically form a substantially planar, rectangular, three-dimensional thermal insulation assembly 11 located between the slabs.
In an embodiment, each of the clamp plates 14 will preferably be manufactured from a metal material. The metal may be treated for example using a process such as galvanic treatment.
Each of the clamp plates 14 shown is elongate and planar. Although the clamp plates may have any shape, a generally rectangular clamp plate with semi-circular ends is preferred as illustrated in Figures 3 and 4.
Also as shown in Figures 3 and 4, an opening 19 is provided at an upper end of each clamp plate 14 to allow connection of a main anchor bar 15 and an opening 20 is provided at a lower end of each clamp plate 14 to allow connection of a bottom anchor bar 16.
In an embodiment, the clamp plates will preferably mount a shear bar 18. A central opening 21 may be provided to allow a shear bar 18 to be connected relative to the clamp plate 14. As shown in Figures 1 and 2, a main anchor bar 15, a bottom anchor bar 16 and a shear bar 18 will preferably be provided relative to each of the clamp plates 14, on both sides of the elongate thermal insulation assembly 11. Typically, each main anchor bar 15, bottom anchor bar 16 and shear bar 18 will extend to one side of the elongate thermal insulation assembly 11. A main anchor bar 15, bottom anchor bar 16 and shear bar 18 on one side of the elongate thermal insulation assembly 11 will preferably be substantially aligned with a main anchor bar 15, bottom anchor bar 16 and shear bar 18 on the opposite side of the elongate thermal insulation assembly 11.
Normally, the opening 19 provided at an upper end of at least some of the clamp plates 14, preferably each clamp plate 14, will overlie a portion of the upper portion 13 of the elongate insulation assembly 11 and the opening 20 provided at a lower end of at least some of the clamp plates 14, preferably each clamp plate 14, will overlie a portion of the lower portion 12 of the elongate insulation assembly 11.
An attachment mechanism or device may be associated with each of the openings 19, 20 provided at the upper end and a lower end of the clamp plate(s) 14 to attach the main anchor bar 15 and bottom anchor bar 16 respectively relative to the clamp plate(s) 14. Although any attachment mechanism or device may be used provided that the attachment mechanism or device allows attachment of the main anchor bar 15 and/or bottom anchor bar 16, an internally threaded nut 22 is preferred as this allows the attachment of a threaded portion of the main anchor bar 15 and/or bottom anchor bar 16 respectively. In situations such as that illustrated in Figures 1 to 4, where the main anchor bar 15 is of a different external dimension to the bottom anchor bar 16, the nuts 22 will also differ in size.
In use, a portion of at least some of the anchor bars 15, 16 extending from each lateral side of the thermal insulation assembly 11 will typically engage with a reinforcing assembly provided internally of at least one, and preferably both of the concrete slabs. In the situation where the connector 10 is used to thermally isolate a balcony slab from the main slab, the anchor bars 15, 16 located on one lateral side of the thermal insulation assembly 11 will typically engage with the preferred reinforcing assembly provided internally of the main slab and the anchor bars 15, 16 located on the opposite lateral side of the thermal insulation assembly 11 will typically engage with the preferred reinforcing assembly provided internally of the balcony slab. Each of the anchor bars 15, 16 will preferably be manufactured from metal material. The metal may be treated for example using a process such as galvanic treatment.
As illustrated, the configuration of the anchor bars relative to the elongate thermal insulation assembly may vary. For example, the configuration of the main anchor bars 15 provided relative to the upper portion 13 differs from the configuration of bottom anchor bars 16 provided relative to the lower portion 12 of the thermal insulation assembly 11.
Although the anchor bars 15, 16 may have any cross-sectional shape, a circular cross-sectional shape is preferred. Typically, the anchor bars 15, 16 will be configured as reinforcing bars.
Each of the anchor bars 15, 16 will preferably be elongate. The anchor bars 15, 16 may be of different lengths. For example, the main anchor bars 15 may be longer than the bottom anchor bars 16. The anchor bars 15, 16 on one lateral side of the thermal insulation assembly 11 may be longer than the anchor bars 15, 16 on the opposite lateral side of the thermal insulation assembly 11.
At least a portion of the anchor bars 15, 16 is preferably configured to allow attachment of the anchor bars 15, 16 relative to the elongate thermal insulation assembly 11. Although any appropriate attachment mechanism may be used, one simple mechanism that may be used is to provide a portion of each of the anchor bars 15, 16 with an externally threaded portion to engage with the preferred internally threaded nut 22 provided relative to the elongate thermal insulation assembly 11.
An anchor plate or assembly 23 may be provided at an outer end of any one or more of the anchor bars 15, 16. Preferably, the anchor plate or assembly 23 is provided with an opening with an internally threaded portion to engage a preferably externally threaded portion of the anchor bar 15, 16. In use, the anchor plate or assembly 23 will typically be caged into a reinforcement structure provided internally of a concrete slab. The anchor plate or assembly 23 will preferably be larger radially and/or laterally than the cross-sectional dimension of the anchor bar 15, 16. A variety of different configurations of anchor plate or assembly 23 are illustrated in Figures 1 and 2. Each anchor bar 15, 16 is preferably elongate and unitary. Preferably, anchor bars 15, 16 are provided in pairs, substantially coaxial with one another and extending from either side of the elongate thermal insulation assembly 11. Typically, the inner ends of the respective pairs of anchor bars 15, 16 (the ends of the anchor bars 15, 16 which are attached to the elongate thermal insulation assembly 11) are spaced from one another and/or thermally isolated from one another in order to minimise or prevent heat transfer through the elongate thermal insulation assembly 11. Each of the pairs of anchor bars 15, 16 are typically attached relative to the elongate thermal insulation assembly 11.
As shown in Figures 1 and 2, the main anchor bar 15 is typically larger, preferably in cross sectional area than the bottom anchor bar 16. Each main anchor bar 15 may be longer than each bottom anchor bar 16 but preferably there are substantially the same length. In a preferred configuration, the main anchor bar 15 will preferably be M20 Grade 8.8 and preferably approximately 350 mm in length from the elongate thermal insulation assembly 11, to a free end although this the dimension, material, grade and length may vary according to the particular application of the connector 10. A direct coupler is preferably provided to each main anchor bar 15.
In a preferred configuration, the bottom anchor bar 16 will preferably be M12 Grade 8.8 and preferably approximately 350 mm in length from the elongate thermal insulation assembly 11 to a free end although this the dimension, material, grade and length may vary according to the particular application of the connector 10. A direct coupler is preferably provided to each bottom anchor bar 16.
As mentioned above, the configuration of anchor bars 15, 16 provided on each side of the elongate thermal insulation assembly 11 will typically be matched.
The connector 10 illustrated in the Figures is provided with a number of shear bars 18. Preferably, an elongate shear bar 18 is provided relative to each of the clamp plates 14. Typically, each elongate shear bar 18 will extend between the main anchor bar 15 and the bottom anchor bar 16. Typically, each shear bar 18 will be substantially parallel to and spaced from both the main anchor bar 15 and the bottom anchor bar 16. Each of the shear bars 18 will preferably be manufactured from metal material. The metal may be treated for example using a process such as galvanic treatment.
Each of the shear bars 18 will preferably be elongate. Each of the shear bars 18 will preferably be planar. In one form, the shear bars 18 will be provided in order to minimise or prevent the concrete slabs from slipping past one another, particularly in a vertical direction.
In the illustrated form, each shear bar 18 will be approximately 50 mm x 8 mm x 450 mm in length extending from the elongate thermal insulation assembly 11.
The connector 10 may include at least one tubular member 24 located relative surrounding at least some of the shear bars 18, receiving at least a portion of the shear bar 18 within the hollow interior of the at least one tubular member 24.
The at least one tubular member 24 may have one or more shaped ends. The at least one tubular member 24will typically extend from the clamp plate 14 toward an outer end of the shear bar. Preferably, the tubular member 24 will contain the entirety of the shear bar 18 internally. The tubular member may be open-ended or close ended. In a preferred form, the tubular member 24 is approximately 33.7 mm in internal diameter and approximately 3 mm in wall thickness. In an embodiment, the at least one tubular member 24 may be annular in cross-sectional shape.
As shown in Figures 5 and 6, the connector 10 may further comprise a shear bar cover25. Preferably, the shear bar cover 25 may function to thermally shroud the shear bar 25, to minimise or prevent thermal transfer through the elongate thermal insulation assembly 11.
Where provided, the shear bar cover 25 will preferably be formed of one or more materials of low thermal conductivity. The shear bar cover 25 is preferably continuous about the shear bar, preferably on both sides of the elongate thermal insulation assembly 11.
The shear bar cover 24 may have any configuration. For example, the shear bar cover may be configured as an elongate tube with a central bore corresponding in shape to the shear bar 18 that can be slipped longitudinally over the shear bar 18 before laying the concrete. Alternatively, the shear bar cover 24 may be a multi-part cover which is assembled about the shear bar 18 to mount relative thereto. As shown in Figure 5, a pair of elongate shear bar cover portions 26 may be provided, each of which is L-shaped in cross-sectional shape. The shear bar cover portions 27 can then be positioned relative to one another to form an elongate rectangular tube with a central bore corresponding in shape to the shear bar 18 and attached together about the shear bar 18.
The outer, free end of the shear bar cover may be closed or open. Where the shear bar cover is provided in more than one part, the end portion of the shear bar cover may be attached to either of the cover portions or attached to the elongate rectangular tube after the cover portions have been attached to one another.
The one or more embodiments are described above by way of example only. Many variations are possible without departing from the scope of protection afforded by the appended claims.

Claims

1. A structural thermal break connector to connect a pair of concrete slabs relative to one another and thermally isolating the pair of concrete slabs from one another, the connector comprising: a) An elongate thermal insulation assembly between the pair of concrete slabs, the elongate thermal insulation assembly including at least one lower portion of high compressive resistance and low thermal conductivity; and b) A plurality of anchor bars extending from each lateral side of the thermal insulation assembly to anchor the connector between the pair of concrete slabs.
2. A structural thermal break connector to connect a pair of concrete slabs relative to one another and thermally isolating the pair of concrete slabs from one another, the connector comprising: a. an elongate thermal insulation assembly between the pair of concrete slabs, the elongate insulation assembly including: i. at least one lower portion of high compressive resistance and low thermal conductivity; and ii. at least one upper portion of lesser density than the at least one lower portion and low thermal conductivity; b. a plurality of clamp plates on a lateral side of the thermal insulation assembly and spanning a portion of both of the at least one lower portion and the at least one upper portion; and c. a plurality of anchor bars extending from each lateral side of the thermal insulation assembly to anchor the connector between the pair of concrete slabs.
3. A structural thermal break connector as claimed in claim 1 or claim 2 wherein the thermal insulation assembly is elongate, spanning a length of at least one of the concrete slabs.
4. A structural thermal break connector as claimed in any one of the preceding claims wherein the thermal insulation assembly is continuous between the pair of concrete slabs.
5. A structural thermal break connector as claimed in either one of claims 3 or 4 when dependent on claim 2 wherein the at least one upper portion and the at least one lower portion are coplanar.
6. A structural thermal break connector as claimed in any one of claims 3 to 5 when dependent on claim 2 wherein the clamp plates and anchor bars connect to or relative to the thermal insulation assembly but do not connect through the thermal insulation assembly nor abut in order to minimise any thermal transfer across the thermal insulation assembly.
7. A structural thermal break connector as claimed in any one of claims 3 to 6 when dependent on claim 2s wherein a plurality of openings is formed in a part of the at least one lower portion to each allow connection of one or more bottom anchor bars relative thereto.
8. A structural thermal break connector as claimed in any one of claims 3 to 7 when dependent on claim 2 wherein the at least one lower portion includes an upper edge which corresponds in shape to a lower edge of the at least one upper portion.
9. A structural thermal break connector as claimed in claim 8 wherein the or each upper edge of the at least one lower portion have a crenelated shape including a series of upwardly extending merlons spaced apart by one of a series of embrasures, crenels or depressions.
10. A structural thermal break connector as claimed in claim 9 when dependent on claim 7 wherein an opening is formed through each of the merlons.
11. A structural thermal break connector as claimed in any one of claims 8 to 10 wherein the lower edge of the at least one upper portion has a crenelated shape including a series of downwardly extending merlons spaced apart by one of a series of embrasures, crenels or upwardly extending depressions.
12. A structural thermal break connector as claimed in any one of claims 3 to 11 when dependent on claim 2 wherein a plurality of openings is preferably formed in a part of the at least one upper portion to each allow connection of one or more main anchor bars relative thereto.
13. A structural thermal break connector as claimed in claim 12 wherein at least some of the openings in the at least one upper portion are provided aligned with an opening provided in the at least one lower portion such that an anchor plate can be positioned to connect the at least one lower portion to the at least one upper portion.
14. A structural thermal break connector as claimed in any one of claims 3 to 13 when dependent on claim 2 wherein each clamp plate includes an opening provided at an upper end in each clamp plate to allow connection of a main anchor bar and an opening provided at a lower end in each clamp plate to allow connection of a bottom anchor bar.
15. A structural thermal break connector as claimed in claim 14 wherein an attachment mechanism or device is associated with each of the openings provided at the upper end and lower end of each clamp plate to attach the main anchor bar and bottom anchor bar respectively relative to the clamp plate.
16. A structural thermal break connector a as claimed in any one of claims 3 to 15 when dependent on claim 2 wherein a number of anchor bars are provided relative to the at least one upper portion designated as main anchor bars and a number of anchor bars are provided relative to the at least one lower portion designated as bottom anchor bars.
17. A structural thermal break connector as claimed in any one of claims 3 to 16 when dependent on claim 2 wherein at least a portion of the anchor bars is configured to allow attachment of the anchor bars relative to the elongate thermal insulation assembly.
18. A structural thermal break connector as claimed in any one of claims 3 to 17 when dependent on claim 2 wherein an anchor plate or assembly is provided at an outer end of any one or more of the anchor bars, the anchor plate or assembly being larger radially and/or laterally than a cross sectional dimension of the respective one or more anchor bars.
19. A structural thermal break connector as claimed in any one of claims 3 to 18 when dependent on claim 2 wherein the anchor bars are provided in pairs, substantially coaxial with one another and extending from either side of the elongate thermal insulation assembly with an inner end of the respective pairs of anchor bars spaced from one another and/or thermally isolated from one another in order to minimise or prevent heat transfer through the elongate thermal insulation assembly.
20. A structural thermal break connector as claimed in any one of claims 3 to 19 when dependent on claim 2 wherein at least one of the clamp plates mount at least one shear bar.
21. A structural thermal break connector as claimed in claim 20 wherein a main anchor bar, a bottom anchor bar and a shear bar are provided relative to each of the clamp plates.
22. A structural thermal break connector as claimed in either claim 20 or claim 21 wherein each of the shear bars is planar.
23. A structural thermal break connector as claimed in any one of claims 20 to 22 further comprising at least one tubular member located surrounding one or more of the shear bars, receiving at least a portion of the respective shear bar within a hollow interior of the at least one tubular member.
24. A structural thermal break connector as claimed in any one of claims 20 to 23 further comprising a shear bar cover to thermally shroud the shear bar to minimise or prevent thermal transfer through the elongate thermal insulation assembly.
25. A structural thermal break connector as claimed in claim 24 wherein the shear bar cover is a multi-part cover, assembled about the shear bar to mount relative thereto to form an elongate tube with a central bore corresponding in shape to an external shape of the shear bar, and then attached together.
26. A structural thermal break connector as claimed in any one of claims 3 to 25 when dependent on claim 2 wherein the at least one lower portion and/or the at least one upper portion is formed of one or more plastic or polymeric materials.
27. A structural thermal break connector as claimed in any one of claims 3 to 26 when dependent on claim 2 wherein the at least one lower portion and/or the at least one upper portion is formed of a mineral wool derivative material.
28. A structural thermal break connector as claimed in any one of claims 3 to 27 when dependent on claim 2 wherein any one or more of the anchors and/or clamp plates and/or shear bars are formed of a structurally capable non-metallic material instead of metal.
EP21736005.6A 2020-05-27 2021-05-26 Structural thermal break connector Pending EP4158119A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2007894.5A GB2595473B (en) 2020-05-27 2020-05-27 Structural thermal break connector
PCT/GB2021/051274 WO2021240148A1 (en) 2020-05-27 2021-05-26 Structural thermal break connector

Publications (1)

Publication Number Publication Date
EP4158119A1 true EP4158119A1 (en) 2023-04-05

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ID=71406329

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Application Number Title Priority Date Filing Date
EP21736005.6A Pending EP4158119A1 (en) 2020-05-27 2021-05-26 Structural thermal break connector

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EP (1) EP4158119A1 (en)
GB (1) GB2595473B (en)
WO (1) WO2021240148A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4245934A1 (en) * 2022-03-14 2023-09-20 Leviat GmbH Thermally insulating component

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Publication number Priority date Publication date Assignee Title
CH676615A5 (en) * 1988-04-22 1991-02-15 Bau Box Ewiag
CH678076A5 (en) * 1988-10-27 1991-07-31 Erico Products S A Insulating collar for reinforced concrete joints - has steel sleeves welded to one side with plastic collars on the other
CH685252A5 (en) * 1992-03-02 1995-05-15 Extruplast Gmbh Cantilever-slab connection element
DE29723292U1 (en) * 1996-09-20 1998-07-30 Schöck Bauteile GmbH, 76534 Baden-Baden Component for thermal insulation
DE19638538A1 (en) * 1996-09-20 1998-03-26 Schoeck Bauteile Gmbh Component for thermal insulation
DE19711813C2 (en) * 1997-03-21 2000-03-09 Fraunhofer Ges Forschung Thermally insulating component
AT408675B (en) * 1999-02-12 2002-02-25 Avi Alpenlaendische Vered DEVICE FOR CONNECTING CANTILEVER PLATES TO A WALL OR CEILING CONSTRUCTION
ATE373750T1 (en) * 2004-02-11 2007-10-15 Halfen Gmbh THERMALLY INSULATING COMPONENT
DE102011109959A1 (en) * 2011-08-11 2013-02-14 Schöck Bauteile GmbH Component for thermal insulation
DK2653625T3 (en) * 2012-04-20 2019-03-11 Halfen Gmbh Thermally insulating structural element
US8973317B2 (en) * 2013-05-13 2015-03-10 James Larkin Thermal break for concrete slab edges and balconies
BE1023762B1 (en) * 2016-01-12 2017-07-14 Plakabeton Nv CONSTRUCTION ELEMENT FOR THE CONCLUSION OF A CONNECTION BETWEEN THERMAL INSULATED PARTS OF A BUILDING
LT3202991T (en) * 2016-02-03 2021-11-10 Halfen Gmbh Thermally insulating component
GB2567685A (en) * 2017-10-20 2019-04-24 Insula Ltd Thermally insulating anchor

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GB202007894D0 (en) 2020-07-08
GB2595473A (en) 2021-12-01
WO2021240148A1 (en) 2021-12-02
GB2595473B (en) 2024-06-26

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