Modular Safety Tiles for Wheelchair Accessible Playgrounds
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Solution Overview
Problem
Current playground safety surfaces either compromise safety or accessibility, with loose fill materials providing poor wheelchair accessibility and unitary surfaces being costly and inadequate in impact attenuation, while adhering to ADA standards poses economic hardships, especially for interim recreational areas.
Innovation Solution
The development of modular, thin-walled tiles made from recycled rubber or plastic that can be easily assembled on-site to create a stable unitary surface over loose fill materials, enhancing safety and accessibility while maintaining cost-effectiveness for installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If loose fill material is used for playground safety surface, then safety and cost-effectiveness are improved, but wheelchair accessibility deteriorates
Solution Approach 1:
A transition surface layer is introduced as an intermediary between the loose fill material and the wheelchair user. This transition surface provides a stable, accessible pathway while allowing the loose fill material to remain in place for safety and cost-effectiveness. The transition surface acts as a mediator that reconciles the conflicting requirements of accessibility and safety.
Solution Approach 2:
The playground safety surface is segmented into multiple functional layers: a loose fill material layer for impact attenuation and safety, and a separate transition surface layer for wheelchair accessibility. This segmentation allows each layer to optimize its specific function without compromising the other.
2Ease of operation
If current unitary surface is used for playground safety surface, then wheelchair accessibility is improved, but safety and cost-effectiveness deteriorate
Solution Approach 1:
The safety surface system is divided into distinct functional components: the unitary surface provides accessibility, while the loose fill material layer provides impact attenuation. This segmentation allows each material to be optimized for its specific purpose rather than requiring a single material to fulfill all functions.
Solution Approach 2:
The playground safety surface uses a composite structure combining a unitary surface material (for accessibility) with a loose fill material layer (for safety). This composite approach leverages the strengths of each material type to achieve both accessibility and safety simultaneously.
3Ease of operation
If current unitary surface is used for playground safety surface, then wheelchair accessibility is improved, but cost-effectiveness deteriorates
Solution Approach 1:
A cost-effective transition surface is introduced as an intermediary that provides wheelchair accessibility without requiring expensive current unitary surface materials. This intermediate solution maintains accessibility while significantly reducing material and installation costs.
Solution Approach 2:
The transition surface uses economical materials that can be easily installed and maintained, providing a cost-effective alternative to expensive current unitary surfaces while achieving the necessary accessibility standards.
Data Source
AI summary
A unitary safety surface tile. The tile may interlock with at least one other tile. Each tile may be configured for disposing on a base of loose fill. Each tile may be configured for receiving a covering of loose fill. Each tile may include a plurality of hollow pockets. Each of the pockets may connect to at least one other pocket along a top edge of each pocket. Each of the pockets may engage the base of loose fill and/or receive the covering of loose fill. Each of the pockets may include one or more apertures for allowing passage of fluid through each of the pockets. Each tile may further include a plurality of edges. The edges may border the plurality of pockets. Each of one or more of the edges may be adapted for engaging at least one edge of at least one other unitary safety surface tile.