Cold-Worked Veneer Ties for Cavity Wall Anchoring
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Solution Overview
Problem
Existing anchoring systems for cavity walls, particularly those with brick or stone veneer and masonry or dry wall construction, face failures due to weak connections between veneer ties and receptors, especially under lateral forces, and struggle to balance mortar and wire formative needs for stability and alignment.
Innovation Solution
A high-strength partially compressed veneer tie system with cold-worked wire formatives that interengage with wall anchors, providing enhanced compressive and tensile strength, and adjustable for various wythe configurations, including masonry block and dry wall structures, to restrict lateral movement while maintaining vertical adjustability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If larger cavities are used in exterior cavity walls to meet insulation requirements, then insulation R-values are improved, but the span that veneer facing material is tied down increases, reducing connection strength
Solution Approach 1:
The patent applies cold-working to compress the wire formative, fundamentally changing its physical parameters. This compression increases the yield strength and tensile strength of the wire, allowing it to maintain connection strength over larger cavity spans while accommodating higher insulation R-values
2Strength
If heavy wire anchors with larger diameters are used to increase strength, then connection strength is improved, but alignment of courses of block becomes difficult, causing misalignment
Solution Approach 1:
The patent transforms a thin wire into a compressed formative with enhanced strength properties through cold-working. This allows the use of a smaller diameter element that is easier to align, while compensating for the reduced diameter through increased material strength rather than increased size
3Manufacturing precision
If thinner gage wire formatives are used to improve alignment, then alignment precision is improved, but connection strength decreases, reducing stability
Solution Approach 1:
The patent applies cold-working compression to thin wire formatives, fundamentally changing their mechanical properties. This process increases the yield strength and tensile strength of the thinner wire, allowing it to provide both improved alignment and adequate connection strength
4Strength
If the number of fine-wire anchors per unit area is increased to improve stability, then connection strength is improved, but device complexity increases
Solution Approach 1:
The patent enhances the strength parameters of individual wire formatives through cold-working compression. This allows each anchor to carry higher loads, reducing the total number of anchors needed while maintaining or improving overall connection strength and stability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves a 130% increase in compressive and tensile strength compared to standard wire formatives, ensuring stable and secure attachment of veneer to inner wythes under seismic and wind loads, while being economical and labor-efficient.
Implementation Method 1
a cold-worked wire formative that is characterized by high resistance to compressive and tensile forces
Implementation Method 2
The high-strength construction system hereof is applicable to construction of a wall having an inner wythe which can either be of dry wall construction or masonry block
Data Source
AI summary
A high-strength pintle anchoring system for a cavity wall is disclosed. The high-strength pintle anchoring system employs a partially compressively reduced veneer tie that is cold-worked with the resultant body partially having substantially semicircular edges and flat surfaces therebetween. The edges are aligned to receive compressive forces transmitted from the outer wythe. The partially compressively reduced veneer tie, when part of the anchoring system, interengages with the receptor portions of a wall anchor and are dimensioned to preclude significant movement lateral with or normal to the inner wythe.