According to the California Building Code, buildings located in Seismic Design Category D must comply with which specific seismic design requirements?
Correct Answer
D) CBC Chapter 16A additional requirements
CBC Chapter 16A contains California's additional seismic design requirements that supplement the IBC provisions. These enhanced requirements apply to buildings in higher seismic design categories and reflect California's extensive seismic research and experience with earthquake-resistant construction methods.
Why This Is the Correct Answer
CBC Chapter 16A contains California's enhanced seismic design requirements that go beyond the standard IBC provisions. For Seismic Design Category D buildings, these additional requirements are mandatory and include specific provisions for structural systems, detailing requirements, and design criteria that reflect California's extensive earthquake experience and research. These requirements supplement, not replace, the base IBC seismic provisions.
Why the Other Options Are Wrong
Option A: No special seismic requirements beyond wind loads
This is completely incorrect. Buildings in Seismic Design Category D face significant seismic hazards and require extensive special seismic design requirements. Wind loads alone are inadequate for earthquake resistance, and ignoring seismic requirements would result in unsafe construction in high-risk seismic zones.
Option B: Local jurisdiction requirements only
While local jurisdictions may have additional requirements, they cannot be less stringent than state requirements. CBC Chapter 16A establishes mandatory statewide enhanced seismic requirements for Category D buildings that local jurisdictions must enforce, making local requirements alone insufficient.
Option C: Standard IBC seismic provisions only
Standard IBC seismic provisions alone are insufficient for California's high seismic risk areas. California adopted additional requirements in CBC Chapter 16A specifically because the base IBC provisions were deemed inadequate for the state's unique seismic conditions and higher risk levels.
Memory Technique
Remember '16A = Additional' - CBC Chapter 16A provides Additional seismic requirements beyond IBC for California's earthquake-prone areas.
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