Framing & StructuralCâu 373 / 700
On a stair with solid risers and treads less than 11 inches deep, a nosing is required. What projection range does the code specify for that nosing?
a.0 to 1/4 inch
b.1 to 2 inches
c.2 to 3 inches
d.3/4 inch to 1-1/4 inch
Giải thích
Where a nosing is required, it must project between 3/4 inch and 1-1/4 inch beyond the riser below, giving extra effective foot depth without becoming a trip hazard. The other ranges are either too small to help or so large they create a catch point and are not code-compliant.
Trích dẫn luật: 2025 CA Residential Code §R311.7.5.3Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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