Research Article
Seismic Performance Evaluation of Buried Sewage Collection Pipelines
Table 3
Weighted coefficient for diameter of a pipe.
| Coefficient cd | Pipe diameter (d) |
| D < 75 mm | 1.6 | 75 mm < d < 150 mm | 1.0 | 150 mm < d < 250 mm | 0.9 | 250 mm < d < 450 mm | 0.7 | 450 mm < d < 1000 mm | 0.5 | d > 1000 mm | 0.4 |
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