Framing & StructuralCâu 366 / 700
Why must deck framing lumber in contact with the weather and near the ground be pressure-preservative-treated or naturally durable?
a.To resist decay and insect attack in the exposed, moist environment
b.To make it lighter
c.To improve its color
d.To make painting unnecessary
Giải thích
Exterior deck lumber sits in a wet, exposed environment where untreated wood rots and is attacked by insects, so it must be preservative-treated or a naturally durable species to last. Treatment is not about reducing weight, improving color, or eliminating the option to paint or finish.
Trích dẫn luật: 2025 CA Residential Code §R507.2Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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