PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code
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3.2.5.13.Combustible Sprinkler Piping
(1) Combustible sprinkler piping shall be used only for sprinkler systems in residential occupancies and other light-
hazard occupancies. (See Note A-3.2.5.13.(1))
(2) Combustible sprinkler piping shall meet the requirements of ULC/ORD-C199P, “Combustible Piping for Sprinkler
Systems.”
(3) Except as permitted by Sentence (5), combustible sprinkler piping shall be separated from the area served by the
sprinkler system, and from any other fire compartment, by ceilings, walls, or soffits consisting of, as a minimum,
(a) lath and plaster,
(b) gypsum board not less than 9.5 mm thick,
(c) plywood not less than 13 mm thick, or
(d) a suspended membrane ceiling with
(i) steel suspension grids, and
(ii) lay-in panels or tiles having a mass not less than 1.7 kg/m 2.
(4) Except as permitted by Sentence (5), combustible sprinkler piping may be located above a ceiling, provided that the
distance between the edge of any ceiling opening that is not protected in conformance with Sentence (3) and the nearest
sprinkler is not more than 300 mm.
(5) Where combustible sprinkler piping has been tested in conformance with ULC/ORD-C199P, “Combustible Piping
for Sprinkler Systems,” and has been shown to meet the requirements therein without additional protection, conformance
to Sentences (3) and (4) is not required.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.