Rotatable Retention Spacer for Decking Joist Alignment
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Solution Overview
Problem
Existing spacers in exterior flooring systems are prone to breaking due to compromised strength and rigidity, leading to mis-alignment and uneven loading, as they are designed to snap off easily for cost-effective manufacturing but lack sufficient rigidity.
Innovation Solution
A spacer design featuring a central region with laterally extending arms and a retention portion that is rotatable and offset, allowing it to be securely locked within a recess of a support joist, preventing vertical movement and removal, and ensuring proper alignment of the spacer arms with flooring elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spacer arms are connected to the main spacer body by a frangible region to enable easy snapping off, then ease of manufacture is improved, but strength and rigidity are compromised
Solution Approach 1:
The spacer is divided into modular components: a central body with frangible regions that allow spacer arms to be snapped off. This segmentation enables a single spacer model to serve multiple configurations (one, two, or four arms), improving manufacturing efficiency while maintaining structural integrity through optimized frangible region design
Solution Approach 2:
The frangible regions are designed with specific geometric parameters (thinner cross-section, reduced material density) that allow controlled breaking under minimal force. This parameter change enables easy arm removal for manufacturing flexibility while the remaining spacer body retains sufficient strength and rigidity for structural support
2Ease of manufacture
If spacer arms are made easily snapable for cost-effective manufacturing, then manufacturing cost is reduced, but reliability is worsened due to potential breaking during use
Solution Approach 1:
The spacer design segments the structure into a permanent central body and removable arms connected by frangible regions. This allows the critical load-bearing central body to be manufactured with high strength materials and geometry, while the arms can be easily removed if needed, achieving both cost-effectiveness and reliability
Solution Approach 2:
The frangible regions provide dynamic adaptability: they remain intact during installation and normal use to ensure reliability, but can be easily broken if arm removal is needed. This dynamic characteristic allows the spacer to transition from a rigid single-model design to a flexible multi-configuration solution without compromising reliability
3Adaptability or versatility
If the retention portion is rotatable to align spacer arms with flooring elements, then adaptability is improved, but device complexity increases
Solution Approach 1:
The retention portion is designed to rotate within the recess, providing dynamic adaptability to align spacer arms with different flooring element configurations. This simple rotational movement, enabled by the recess geometry, allows a single spacer model to accommodate various layouts without requiring multiple specialized spacer types, achieving high adaptability with minimal added complexity
Solution Approach 2:
The rotatable retention portion enables a single spacer design to perform multiple functions: accommodating different flooring element orientations, adapting to various recess positions in joists, and providing alignment guidance during installation. This multi-functionality reduces the need for multiple spacer models, offsetting the slight increase in device complexity with significant versatility gains
Data Source
AI summary
A spacer for support elements of a decking or paving support system, has a central region, at least two spacer arms extending laterally from the central region, and a retention portion coupled to the central region, wherein the retention portion has a longest lateral axis extending laterally and wherein the longest lateral axis lies at an angle to each of the at least two spacer arms.