Indexing Tab for Grid Runner Panel Centering and Marring Prevention
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Solution Overview
Problem
Suspended ceiling grid runners suffer from damage during shipping and handling due to vibration, and existing indexing tabs are ineffective in centering and restraining thin panels.
Innovation Solution
The implementation of indexing tabs stamped from a central web of the grid runners, which are designed to be located at the flange level, providing additional protection and centering capabilities for thin panels, and are specifically adapted for double reveal type grid runners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If grid runners are nested side-by-side with alternate runners inverted to minimize packaging size, then space efficiency is improved, but the visible surfaces of runners are marred by vibration during shipping and handling
Solution Approach 1:
The patent applies beforehand cushioning by positioning foam or paper protectors at the leading and trailing ends of each grid runner, specifically at the flange surfaces that would contact adjacent runners during nested stacking. This protective layer is applied in advance of shipping, preventing vibration-induced marring while maintaining the space-efficient nested packaging configuration.
Solution Approach 2:
The patent introduces an intermediary protective material (foam or paper) between adjacent grid runners in the nested package. This intermediary layer acts as a mediator that absorbs vibration and prevents direct contact between runner surfaces, eliminating the marring problem while preserving the compact nested arrangement.
2Stability of the object's composition
If indexing tabs are added to center and restrain thin panels in grid spaces, then panel stability is improved, but the complexity of the grid runner construction increases
Solution Approach 1:
The patent applies segmentation by dividing the indexing tab into separate, modular components that can be individually attached to the grid runner flange. Rather than integrating a complex monolithic centering mechanism, the tab is segmented into simple attachment elements and centering features, reducing overall construction complexity while maintaining panel restraint effectiveness.
Solution Approach 2:
The indexing tab is designed to be self-aligning and self-restraining, where its geometry automatically centers the panel without requiring additional adjustment mechanisms. The tab's shape and positioning cause thin panels to naturally settle into the centered position, eliminating the need for complex active control or adjustment systems.
Data Source
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AI summary
A roll formed sheet metal grid runner, and method of its manufacture, for a suspended ceiling grid having indexing tabs stamped from a central web of the runner profile, the tabs being effective to reliably locate ceiling panels and, when the grid runner is nested with other identical runners in a package, avoid marring of visible surfaces.