FSC System Design & Planning Flashcards
6 cards from real FSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 FSC System Design & Planning flashcards as text
When planning a firestop system for a mechanical room with multiple large duct penetrations, which NFPA standard provides supplemental guidance on fire dampers and duct penetrations?
Answer: NFPA 90A: Standard for the Installation of Air-Conditioning and Ventilating Systems
NFPA 90A governs HVAC duct installations, including fire damper placement and requirements that work in conjunction with firestop assemblies at duct penetrations.
What is a 'penetration firestop system' schedule, and how is it used during the design phase?
Answer: A tabulated document listing each penetration type, its location, the approved firestop assembly listing, and the required fire rating for reference during installation and inspection
The penetration firestop system schedule is a design coordination document that ensures every penetration is pre-assigned a code-compliant, listed assembly before work begins.
Which factor determines whether a combustible or non-combustible firestop assembly design is needed for a pipe penetration?
Answer: Whether the pipe itself is combustible (e.g., CPVC, PVC) or non-combustible (e.g., cast iron, copper)
Combustible pipes require intumescent firestop products that react to heat and seal the opening as the pipe burns away, while non-combustible pipes use different sealant or mortar-based assemblies.
Why must the firestop designer verify the fire-resistance rating of the host assembly (floor or wall) before selecting a firestop product?
Answer: The firestop assembly must achieve at least the same hourly fire rating as the host assembly it penetrates to maintain the overall fire barrier
Firestop assemblies are required to match or exceed the fire-resistance rating of the host assembly so the penetration does not become the weakest point in the fire barrier.
In US construction, which entity is primarily responsible for reviewing and approving firestop system submittals before installation begins?
Answer: The Authority Having Jurisdiction (AHJ), typically the local building official or fire marshal
The AHJ is the government body, organization, or individual responsible for enforcing the requirements of building codes, including approving firestop submittals.
What does 'UL System Number' (e.g., WL1025) convey to a firestop designer or installer?
Answer: It identifies a specific tested and listed firestop assembly with exact materials, dimensions, and installation methods that have been fire-tested by UL
The UL System Number references a specific listing in the UL Fire Resistance Directory, providing the exact tested assembly configuration that must be replicated for compliance.