Hawaii Building Code requires special inspection for concrete placement in seismic design categories. What is the minimum frequency for concrete strength testing?
Correct Answer
A) One test per 50 cubic yards
Hawaii requires concrete strength testing at a minimum frequency of one test per 50 cubic yards for structural concrete in seismic design applications.
Why This Is the Correct Answer
The Hawaii Building Code mandates concrete strength testing at one test per 50 cubic yards for structural concrete in seismic design categories. This frequency ensures adequate quality control for critical structural elements that must withstand seismic forces. The 50 cubic yard interval provides sufficient sampling density to verify concrete strength meets design specifications while maintaining construction efficiency in earthquake-prone Hawaii.
Why the Other Options Are Wrong
Option B: One test per 100 cubic yards
One test per 100 cubic yards is insufficient for seismic design category concrete in Hawaii. This reduced frequency would provide inadequate quality control for structural elements that must resist earthquake forces. The Hawaii Building Code specifically requires more frequent testing at 50 cubic yard intervals to ensure proper concrete strength in seismic applications.
Option C: One test per 150 cubic yards
One test per 150 cubic yards represents dangerously infrequent testing for seismic design concrete. This extended interval would fail to provide adequate quality assurance for earthquake-resistant construction. Hawaii's seismic requirements demand much more frequent testing at 50 cubic yard intervals to verify concrete strength meets critical structural performance standards.
Option D: One test per day of placement
Testing frequency based on daily placement rather than volume is inappropriate for concrete quality control. Daily testing could result in inadequate sampling if large volumes are placed, or excessive testing for small pours. Volume-based testing at 50 cubic yards ensures consistent quality control regardless of placement schedule or crew productivity variations.
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