Under the Virginia Uniform Statewide Building Code (USBC), what is the maximum allowable deflection for a residential floor joist with a 16-foot span under live load?
Correct Answer
C) L/360 (0.53 inches)
The USBC follows IRC standards requiring floor joists to have maximum deflection of L/360 under live load. For a 16-foot (192-inch) span: 192/360 = 0.53 inches.
Why This Is the Correct Answer
The USBC follows IRC standards requiring floor joists to have maximum deflection of L/360 under live load. For a 16-foot (192-inch) span: 192/360 = 0.53 inches.
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