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Table 1 Relation of damage category and limiting tensile strain, according to Boscardin and Cording (1989)

From: Window detection in facade images for risk assessment in tunneling

Category of damage Degree of severity Limiting strain [%]
0 Negligible 0−0.05
1 Very slight 0.05−0.075
2 Slight 0.075−0.15
3 Moderate 0.15−0.3
4 Severe ≥0.3