Official Journal of the Japan Wood Research Society
Table 3 Safety grading of ancient Chinese timber arch lounge bridges
From: Quantitative safety evaluation of ancient Chinese timber arch lounge bridges
Grades | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
Structure state | Basically intact | Slightly damaged | Moderately damaged | Severely damaged | Nearly collapsed |
Intervention | Periodical inspection | Minor maintenance | Moderate maintenance | Major maintenance | Emergency repair |