In California's high seismic zones, what is the required holdown force capacity for a two-story wood frame shear wall segment with a unit shear of 490 plf and a height of 16 feet, assuming no dead load reduction?
Correct Answer
A) 7,840 pounds
The holdown force is calculated as unit shear × height = 490 plf × 16 feet = 7,840 pounds. CBC Section 2305.3.8 requires holdowns to resist the calculated overturning moment at the base of shear wall segments. This force must be transferred through properly designed holdown hardware and foundation anchorage.
Why This Is the Correct Answer
The holdown force is calculated as unit shear × height = 490 plf × 16 feet = 7,840 pounds. CBC Section 2305.3.8 requires holdowns to resist the calculated overturning moment at the base of shear wall segments. This force must be transferred through properly designed holdown hardware and foundation anchorage.
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