NASA NTRS · 19830000416
Control-Chain Safety Tray and Friction Pull
Abstract
Tray mounted above suspended ceiling keeps sprinkler-system control chain safely out of way of pedestrian traffic below. Tray reached easily by using fireman's hook short stepladder, or chair or by jumping up to grasp chain. Safety tray used for infrequently used control chains on vents and dampers.
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Hajdik, G., Peek, C. R.. 1984-04-01. Control-Chain Safety Tray and Friction Pull. https://ntrs.nasa.gov/citations/19830000416
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