Div. B › Part 9 › 9.10 › 9.10.17 — Flame Spread Limits

9.10.17.2 — Ceilings in Exits or Public Corridors

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(1) At least 90% of the exposed surface of every ceiling in an exit or unsprinklered ceiling in a public corridor shall have a surface flame-spread rating of not more than 25.

OBC Definitions

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exit

means that part of a means of egress, including doorways, that leads from the floor area it serves to a separate building, an open public thoroughfare or an exterior open space protected from fire exposure from the building and having access to an open public thoroughfare.

flame-spread rating

means an index or classification indicating the extent of the spread of flame on the surface of a material or an assembly of materials, as determined in a standard fire test prescribed in this Code.

public corridor

means a corridor that provides access to exit from more than one suite.

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