UL 723S PDF
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UL Outline of Investigation for Drop-Out Ceilings Installed Beneath Automatic Sprinklers – Issue 4
1 Scope
1.1 These requirements cover drop-out ceilings assemblies intended for installation beneath sprinklers. During fire conditions, the drop-out ceiling panels are intended to drop from their supports to expose the sprinklers to the fire.
1.2 Drop-out ceilings covered by these requirements are intended to be installed in accordance with the Standard for the Installation of Sprinkler Systems, NFPA 13.
| Edition | 4 |
|---|---|
| Published Date | January 08, 2026 |
| Language | English |






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