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Glossary Definition

Building-to-Building Fire Spread

Building-to-Building Fire Spread

Ignition transferring directly between structures via radiant heat, flame contact, or wind-driven embers, independent of vegetation fuel.

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Structure-to-Structure Spacing: California's Fire Frontline

California's ADU boom has cut structure-to-structure spacing to 4–10 feet, making fire spread the new wildfire frontline. Here's how to build for it.