A contractor is installing a metal roof system in a hurricane zone in Hawaii. What is the minimum wind speed rating required for basic residential construction?
Correct Answer
C) 150 mph
Hawaii hurricane zones require roofing systems to withstand minimum 150 mph wind speeds for basic residential construction due to frequent tropical storms and hurricanes.
Why This Is the Correct Answer
Hawaii's hurricane zone designation requires roofing systems to be rated for a minimum of 150 mph wind speeds. This reflects historical storm data from Pacific hurricanes and tropical storms that regularly approach or make landfall in the Hawaiian Islands. Metal roofing products must carry certified ratings at this threshold to receive permit approval.
Why the Other Options Are Wrong
Option A: 130 mph
130 mph is insufficient for Hawaii hurricane zones. While 130 mph may be adequate for some high-wind zones on the mainland, Hawaii's Pacific hurricane exposure demands a higher baseline.
Option B: 180 mph
180 mph exceeds the standard minimum requirement for basic residential construction. This value may apply in extremely high-risk coastal exposure zones or specialized structures, but is not the baseline minimum for general residential work.
Option D: 110 mph
110 mph is a typical wind speed requirement for standard construction in many mainland U.S. locations. Applying this value in Hawaii's hurricane zone would result in a non-compliant installation that poses serious life-safety risks.
Memory Technique
Hawaii is halfway to 300 — so think 150 mph as the 'halfway' benchmark for hurricanes. 'One-fifty for Hawaii's hurricane zone' is the phrase to memorize.
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