Flexible Control Joint for Plaster Thickness Variation
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Solution Overview
Problem
Existing control joints cannot accommodate different thicknesses of plaster on opposing sides and fail to flexibly accommodate movement due to differing thermal expansion and contraction characteristics of dissimilar wall structures in multistory buildings.
Innovation Solution
A flexible control joint with a first and second base portion and screed walls, connected by a flexible attachment assembly, allowing for different plaster thicknesses and movement between dissimilar wall structures, featuring intermediate webs and plaster retainers for secure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid control joint is used to maintain uniform screed wall heights, then structural stability is improved, but the ability to accommodate different plaster thicknesses and thermal movement is reduced
Solution Approach 1:
The control joint incorporates a flexible attachment assembly with telescoping or expanding components that allow the screed walls to move relative to each other while maintaining their functional relationship. This dynamic structure enables the joint to adapt to thermal expansion and contraction of dissimilar wall structures while still providing uniform screed wall heights for plaster application.
Solution Approach 2:
The flexible attachment assembly changes the physical parameters of the control joint by allowing variable spacing between screed walls while maintaining their functional alignment. This parameter change enables accommodation of different plaster thicknesses on opposing sides of the joint without compromising the uniformity of screed wall heights.
2Adaptability or versatility
If a flexible attachment assembly is introduced to accommodate thermal movement, then adaptability is improved, but device complexity increases
Solution Approach 1:
The flexible attachment assembly is divided into discrete components including intermediate webs and connection elements that can move independently relative to each other. This segmentation allows the structure to accommodate thermal movement through simple relative motion between components rather than requiring a complex integrated mechanism.
Solution Approach 2:
The attachment assembly utilizes flexible intermediate webs and thin film connection elements that can bend and deform to accommodate thermal expansion and contraction of the wall structures. These flexible components provide the necessary adaptability without requiring complex mechanical mechanisms.
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
Enables the application of varying plaster thicknesses while accommodating structural movement, ensuring seamless integration and aesthetic uniformity across dissimilar wall constructions.
Implementation Method 1
the walls of one structure may move relative to the walls of the adjacent structure at different rates due to differences in the thermal expansion and contraction characteristics of the underlying materials
Data Source
AI summary
A flexible control joint for use in plastering and stucco applications. Various embodiments of the flexible control joint may be used to form screed walls for different thicknesses of plaster materials applied to adjoining walls or other structures. The walls or other structures may be of similar or dissimilar constructions. Various embodiments of the control joint may be used to form corner arrangements or T-arrangements to achieve desired design effects.