North Carolina Building Contractor License Practice Exam

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Prepare for the North Carolina Building Contractor License Exam. Explore detailed quizzes with explanations and challenging multiple-choice questions designed for you. Get ready for your licensing success!

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Wood joists or wood structural floors that are closer than 6 inches to the exposed ground should be made of what type of wood?

Untreated wood
Plywood
Metal
Treated wood

The correct answer is: Treated wood

When wood joists or wood structural floors are located within 6 inches of exposed ground, they are particularly vulnerable to moisture and pests, such as termites. To mitigate these risks, treated wood is the recommended choice. Treated wood undergoes a process where preservative chemicals are infused into the wood to increase its resistance to decay, insects, and fungal growth. This treatment helps ensure that the structural integrity of the wood is maintained even in damp or high-moisture environments. Using treated wood in these situations can significantly extend the lifespan of the structure and protect it from potential damage, making it essential for compliance with building codes that address moisture and pest issues.