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← HistoryWhich form of structural failure risks collapse of an anastasis-reconstructed ancient Roman arch?
A)Insufficient arch compressive downforce✓
B)Masonry biocide over-application
C)Keystone stone thermal expansion
D)Compromised earthwork embankment footing
💡 Explanation
Insufficient arch compressive downforce leads to instability via a lack shear load distribution because weight resists component separation. Therefore arch collapse risk increases rather than other outcomes, like minor cracking or deformation without total destruction. Shear stress surpasses dry friction.
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