#fire load density

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A long, dim medieval oak roof attic seen down its length: steep rafters and heavy trusses form a timber tunnel over the rounded, dusty stone backs of the vaults, with a plank walkway down the middle and work lamps hanging from the beams.

Fire Case Studies

Notre-Dame Fire: Why an 800-Year-Old Roof Burned in Hours

The 2019 Notre-Dame fire grew for half an hour in a 100 m oak attic before anyone called firefighters. See the fuel, the lead, the vaults and the rebuild.

October 16, 2026 · 19 min read