Table 5 Judgment standard of the building damage grade10.
Category of damage | Damage level | Description of typical damage and ease of repair | Approximate crack width (mm) | Limiting tensile strain levels (%) |
|---|---|---|---|---|
Aesthetic damage | Negligible | Hairline cracks of less than about 0, 1 mm width | Up to 0, 1 mm | 0–0.05 |
Very slight | Fine cracks can easily be treated during normal decoration | Up to 1 mm | 0.05–0.075 | |
Slight | Cracks can easily be treated during normal decoration, and some cracks may be required waterproofing | Up to 5 mm | 0.075–0.15 | |
Functional damage | Moderate | Cracks may need to be patched with bricks. Service pipes may fracture. Poor impermeability | 5–15 mm or a number of cracks > 3 mm | 0.15–0.3 |
Severe | The whole wall needs to be repaired, such as replacing part of the wall. The floor and wall are inclined, and the pipeline is damaged | 15–25 mm, but also depends on the number of cracks | > 0.3 | |
Structure damage | Very severe | The building is unstable and needs to be repaired | Usually > 25 mm, but depends on the number of cracks |
