Thermal Break Cage for Reinforcing Bar Positioning
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Solution Overview
Problem
Existing thermal break insulation devices in construction face challenges such as reliance on mechanical strength of insulating plates for reinforcing bar placement, high costs due to stainless steel usage, and risks associated with welding, along with fragility and complexity in assembly and transport.
Innovation Solution
A non-deformable box or cage design that supports reinforcing bars, allowing for the use of any insulating material based on thermal, acoustic, and fire resistance requirements, with a mechanical assembly that reduces stainless steel usage and eliminates welding risks, featuring a metallic or polymeric profile with spacers and sleeves for easy assembly and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid insulating plate is used to support reinforcing bars, then the bars can be properly positioned, but the insulating material becomes fragile and can crumble during transport and assembly
Solution Approach 1:
The device separates the support function from the insulation function by introducing a dedicated cage structure that supports the reinforcing bars, while the insulating material only provides thermal insulation. This segmentation allows the insulating material to be less mechanically robust while maintaining its insulation performance.
Solution Approach 2:
A cage structure acts as an intermediary element between the reinforcing bars and the insulating material. The cage provides the necessary mechanical support and positioning for the bars, while the insulating material fills the spaces within the cage without bearing structural loads.
2Reliability
If stainless steel reinforcing bars are used throughout, then corrosion resistance is ensured, but production cost increases significantly
Solution Approach 1:
Stainless steel is used only in critical zones where corrosion resistance is most important (such as the portions of bars embedded in concrete or exposed to harsh environments), while carbon steel is used in protected interior zones. This local differentiation maintains reliability while reducing overall material cost.
Solution Approach 2:
The invention accepts that some portions of the reinforcing bars may be less durable (carbon steel sections) as long as the critical load-bearing and corrosion-resistant portions maintain sufficient service life. This approach reduces overall cost while maintaining acceptable reliability.
3Ease of manufacture
If stainless steel bars are welded to carbon steel bars, then assembly is simplified, but welding quality and corrosion risk increase
Solution Approach 1:
The welding operation is extracted from the assembly process and replaced with mechanical connection methods such as threading or coupling devices. This eliminates the harmful welding process while maintaining assembly simplicity through standardized mechanical fastening procedures.
Solution Approach 2:
A coupling device or sleeve acts as an intermediary between the stainless steel and carbon steel bar sections, providing a mechanical connection without requiring direct welding between dissimilar metals. This intermediary element eliminates welding-related corrosion risks while maintaining structural integrity.
4Reliability
If multiple parts with threaded sleeves are assembled, then welding risks are eliminated, but assembly complexity and cost increase
Solution Approach 1:
The coupling sleeve and connection features are integrated into a single standardized component that simultaneously provides mechanical connection, alignment, and load transfer functions. This merging reduces the total number of separate parts while maintaining the benefits of non-welded assembly.
Solution Approach 2:
A universal coupling device is designed to handle multiple connection scenarios (different bar diameters, orientations, and material combinations) through a single standardized component type, reducing assembly complexity despite using multiple parts.
5Adaptability or versatility
If the insulating plate is made thinner to accommodate bar curvature, then diagonal bar placement is enabled, but the plate loses rigidity for proper bar positioning
Solution Approach 1:
The support function for diagonal bars is segmented from the insulating plate by using the cage structure to provide positioning features. This allows the insulating plate to be thinner without compromising the rigidity needed for bar positioning, as the cage assumes the support role.
Data Source
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AI summary
The present invention relates to a device for providing insulation in the event of a thermal break, in the form of a construction element, comprising an insulating material to be placed in an essentially longitudinal direction between two parts of a building, and reinforcement bars (4,6) which pass through the insulating material, characterized in that the device comprises a profile in the form of an open or closed box or cage (1,3) which defines an interior space (7) in which said insulating material is placed.