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… watertight 'A' Class bulkheads and decks 4.2.14 Insulating pipe penetrations 4.2.15 Electric cables penetrating 'A' … equivalent material, capable of preventing the passage of smoke and flame to the end of the one-hour standard fire … provide resistance to fire as well as to the passage of smoke and flame, as far as practicable, equivalent to that of …
22.753