46 C.F.R. § 78.47-53

Automatic ventilation dampers.

Last amended: 2016Year: 2026Length: 66 wordsSubsections: 2Official source

Cite as 46 C.F.R. § 78.47-53 (2026)

(a) The manual operating positions for automatic fire dampers in ventilation ducts passing through main vertical zone bulkheads shall be identified by red day light-reflecting letters at least 1/2 inch high “VENTILATION FIRE DAMPER.” In addition, the open and closed positions shall be similarly marked. (b) [Reserved] [CGFR 65-50, 30 FR 16955, Dec. 30, 1965, as amended by CGD 67-87, 32 FR 19181, Dec. 20, 1967]
46 C.F.R. § 78.47-53: Automatic ventilation dampers. | Justis AI