NFPA 921 – 18.3.2 High-Order Damage


NATIONAL STANDARDS

NFPA 921 – 18.3.2 High-Order Damage

“The terms low-order damage and high-order damage are preferred to characterize explosion damage…

High-order damage is characterized by shattering of the structure, producing small, pulverized debris. Walls, roofs, and structural members are splintered or shattered, with the building completely demolished. Debris is thrown great distances, possibly hundreds of feet. High-order damage is the result of rapid rates of pressure rise.”

We see all signs of “high-order damage” in all three building collapses


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