High-Rise Building Construction and Compartmentalization Flashcards
6 cards from real F80 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 High-Rise Building Construction and Compartmentalization flashcards as text
A 'fire barrier' in a high-rise building is designed to:
Answer: Divide a floor into separate compartments to limit the horizontal spread of fire and smoke
Fire barriers are rated assemblies — walls, floors, and doors — that divide a building into compartments, slowing or stopping the spread of fire and smoke horizontally. Compartmentalization is the primary passive fire protection strategy in high-rise buildings.
In fire-resistive construction (Construction Class I), structural elements are designed to withstand fire for at least:
Answer: 2 to 4 hours, depending on the element and occupancy classification
Construction Class I (fire-resistive) requires structural elements to have fire-resistance ratings typically ranging from 2 to 4 hours, depending on the element (columns, beams, floor assemblies) and the building's occupancy type, giving firefighters time to operate before structural failure.
A fire door in a stairwell enclosure must be:
Answer: Self-closing and self-latching, and kept closed at all times
Fire doors in stairwell enclosures must be self-closing and self-latching to maintain the fire rating of the stairwell barrier. A propped-open fire door negates its entire purpose, allowing smoke and fire to enter what should be a protected evacuation route.
The term 'fire-resistance rating' refers to:
Answer: The length of time a construction assembly can withstand fire exposure while maintaining structural integrity and preventing fire passage
A fire-resistance rating is the duration (expressed in hours) that a tested assembly — such as a wall, floor, or column — can be exposed to a standardized fire test while continuing to perform its structural and separating functions.
In a high-rise building, 'compartmentalization' reduces fire casualties primarily by:
Answer: Confining fire and smoke to a limited area, giving occupants time to evacuate and firefighters time to respond
Compartmentalization uses rated barriers to contain fire and smoke within the area of origin, limiting the threat to occupants in other parts of the building and maintaining tenable conditions in evacuation routes — buying time for both evacuation and suppression.
Which of the following actions by a tenant would most seriously compromise compartmentalization on their floor?
Answer: Drilling a hole through a fire-rated wall and leaving it unsealed around a new cable run
Penetrations through fire-rated walls — for cables, pipes, or ducts — must be sealed with listed firestop materials. An unsealed penetration creates a direct pathway for fire and smoke to breach the barrier, eliminating the rated separation between compartments.