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Passive Fire Protection Flashcards

7 cards from real CFPS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Passive Fire Protection flashcards as text

  1. In a through-penetration firestop system, the 'F-rating' represents:

    Answer: The time the system prevents passage of flame through the firestopped opening

    The F-rating is the time in hours that a firestop system prevents passage of flame through a penetration, as measured in UL 1479 or ASTM E814 tests.

  2. Which UL standard is the primary U.S. test standard for through-penetration firestop systems?

    Answer: UL 1479

    UL 1479 (Fire Tests of Through-Penetration Firestops) is the primary U.S. listing standard for evaluating through-penetration firestop assemblies.

  3. The 'T-rating' in a through-penetration firestop system measures:

    Answer: The time that the temperature on the unexposed face of the assembly and the penetrating item remains below 325°F above ambient

    The T-rating measures the time until the unexposed-side temperature (on the assembly or penetrating item) exceeds 325°F above ambient, limiting heat transmission.

  4. An intumescent firestop sealant provides protection primarily by:

    Answer: Expanding dramatically when exposed to heat to fill the void left by a burning or melting penetrating item

    Intumescent materials expand (intumesce) when exposed to heat, filling the annular space or void created as combustible pipes burn away, maintaining the rated assembly.

  5. What is the 'annular space' in the context of a through-penetration firestop system?

    Answer: The gap between the penetrating item and the edge of the opening cut through the fire-rated assembly

    The annular space is the void between the outside of the penetrating item (pipe, cable, duct) and the edge of the hole in the rated assembly that must be firestopped.

  6. A 'membrane penetration' in fire-rated construction differs from a through-penetration because it:

    Answer: Passes through only one membrane (one side) of a fire-rated assembly, not extending through the full assembly thickness

    A membrane penetration breaches only one side of a rated assembly (e.g., an electrical box in one face of a rated wall), and also requires listed protection per IBC Section 714.

  7. Per IBC Section 714, the F-rating of a through-penetration firestop system must be at minimum:

    Answer: Equal to the fire-resistance rating of the assembly being penetrated

    IBC Section 714.4.1 requires that the F-rating of the firestop system be not less than the required fire-resistance rating of the penetrated assembly.