Deck section — 30-inch and 12-foot walking-surface bands
FA Exhibit DET-004. The 30-inch to 12-foot band attaches to walking surfaces. Underfloor enclosure is a separate section. After ORSC R327.3.5 and R327.3.4.4. Seminar height gloss is labeled as practice. Illustrative — not a construction document. Verify with your building official. CC BY 4.0.
Technical review: Grayson Graham. Last verified 2026-08-23. JSON
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<img src="https://fireapproved.com/diagrams/det-004-deck-bands.svg" alt="Section of an elevated deck showing the 30-inch and 12-foot height lines, walking-surface rules, and underfloor protection options." />