(1)
Combustible totally enclosed raceways that are embedded in a concrete floor slab are permitted in an assembly required to have a fire-resistance rating, provided the concrete cover between the raceway and the bottom of the slab is not less than 50 mm.
(2)
Totally enclosed raceways are permitted to penetrate a fire separation, provided they are sealed at the penetration by a firestop conforming to Clause 9.10.9.6.(1)(a).
(3)
Sprinkler piping is permitted to penetrate a fire separation, provided the fire compartments on each side of the fire separation are sprinklered.
(4)
Sprinklers are permitted to penetrate a fire separation or a membrane forming part of an assembly required to have a fire-resistance rating without having to meet the firestop requirements of Article 9.10.9.6. and Clause 9.10.9.8.(6)(a), provided the annular space created by the penetration of a fire sprinkler is covered by a metal escutcheon plate in accordance with NFPA 13, “Standard for the Installation of Sprinkler Systems.”
(5)
Fire dampers are permitted to penetrate a fire separation or a membrane forming part of an assembly required to have a fire-resistance rating without having to meet the firestop requirements of Sentence 9.10.9.6.(1), provided the fire damper is
(a)
installed in conformance with NFPA 80, “Standard for Fire Doors and Other Opening Protectives,”
(b)
specifically designed with a firestop, or
(c)
provided in conformance with Sentence 9.10.5.1.(3). (See also Note A-3.1.9.2.(1).)