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Which consequence results when inadequate ashlar dressing occurs in the buttresses of Gothic cathedrals?

A)Wind uplift resistance decreases slightly
B)Tensile stress within flying buttresses rises
C)Shear stress on masonry elements lowers
D)Horizontal thrust on walls reduces acutely

💡 Explanation

Increased tensile stress results when poor ashlar dressing reduces precise stone fitting; this causes higher stress concentration because the load path becomes less uniform than intended, therefore point loads along the curvature dramatically magnifies stress rather than distributing properly.

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