Framing & StructuralCâu 320 / 700
When rafters frame to a non-structural ridge board (not a ridge beam), what is the minimum requirement for that ridge board's depth?
a.Not less than the cut end (plumb-cut depth) of the rafter
b.Exactly 2 inches regardless of rafter size
c.Twice the rafter depth
d.Half the rafter depth
Giải thích
A ridge board must be at least as deep as the cut (plumb) end of the rafters bearing against it so the full rafter end seats against the board. A fixed 2 inches, twice, or half the rafter depth would either under- or over-size the board relative to the rafter end it must fully support.
Trích dẫn luật: 2025 CA Residential Code §R802.3Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
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- Why does a structural RIDGE BEAM allow a roof to be built without rafter ties, whereas a simple ridge BOARD does not?
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- CALCULATION: A common rafter runs horizontally 12 feet from the wall to the ridge and rises 9 feet. Ignoring overhang and cuts, what is the approximate rafter line length?
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