For a residential structure 500 feet from the ocean in Honolulu, what type of fasteners are required for exterior framing connections?
Correct Answer
D) Stainless steel
Within 3,000 feet of the ocean, Hawaii Building Code requires stainless steel fasteners for exterior connections due to severe corrosion from salt spray.
Why This Is the Correct Answer
The Hawaii Building Code requires stainless steel fasteners for exterior connections on structures within 3,000 feet of the ocean. At 500 feet, the structure is well within this zone, where salt spray corrosion is severe. Only stainless steel provides adequate long-term corrosion resistance in this environment.
Why the Other Options Are Wrong
Option A: Galvanized steel
Galvanized steel (standard) corrodes relatively quickly in marine environments. The thin zinc coating is insufficient to withstand continuous salt spray at 500 feet from the ocean and would not meet Hawaii code requirements for this proximity.
Option B: Hot-dip galvanized steel
Hot-dip galvanized steel offers better corrosion resistance than standard galvanized and is acceptable further from the coast, but it still corrodes in severe marine environments within 3,000 feet. Hawaii code requires stainless steel at this distance.
Option C: Zinc-coated steel
Zinc-coated steel (electroplated) provides less corrosion protection than hot-dip galvanized and is entirely inadequate within 3,000 feet of the Hawaii coast. It would fail rapidly in the salt spray environment.
Memory Technique
Within 3,000 feet = Stainless Steel only. Think of the 'S' rule: Sea proximity → Stainless Steel. No galvanizing holds up to Hawaii's salt spray at close range.
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