Framing & StructuralCâu 391 / 700
What is the MINIMUM headroom clearance required over a residential stairway, measured vertically from the tread nosing line?
a.6 feet 4 inches
b.6 feet 8 inches
c.7 feet 0 inches
d.7 feet 6 inches
Giải thích
The residential code requires a minimum 6 feet 8 inches of headroom above the stair, measured vertically from a line connecting the tread nosings. 6 feet 4 inches is below the minimum; 7 feet 0 inches and 7 feet 6 inches exceed the requirement and are not the code floor value.
Trích dẫn luật: 2025 CA Residential Code §R311.7.2Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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