According to the Virginia Uniform Statewide Building Code (USBC), what is the maximum height for a residential building before it requires a fire sprinkler system?
Correct Answer
D) 30 feet
The USBC requires fire sprinkler systems in residential buildings exceeding 30 feet in height.
Why This Is the Correct Answer
The USBC requires fire sprinkler systems in residential buildings exceeding 30 feet in height.
Why the Other Options Are Wrong
Option A: 45 feet
45 feet is well above the USBC threshold and would leave many mid-rise residential structures without required sprinkler protection.
Option B: 35 feet
35 feet is closer but still above the 30-foot trigger. Buildings between 30 and 35 feet would incorrectly be exempt under this choice.
Option C: 40 feet
40 feet is a common distractor that references a figure from other code contexts (e.g., certain commercial classifications) but is not the USBC residential sprinkler threshold.
Memory Technique
30 feet = 3 stories roughly. Think: if a fire truck ladder can comfortably reach 3 floors (about 30 ft), anything taller must protect itself — hence sprinklers required above 30 feet.
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