Research Article
Semiquantitative Fire Risk Grade Model and Response Plans on a National Highway Bridge
Table 1
Maximum surface temperature of concrete bridges according to mobilization time criteria and vertical clearance (130 MW). Unit: °C.
| Mobilization time criteria for fire suppression (min) | Vertical clearance (m) | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| I (0–5) | 909 | 726 | 567 | 364 | 288 | 202 | 157 | 124 | 104 | 81 | 74 | 64 | II (5–8) | 969 | 1030 | 1030 | 1020 | 1010 | 961 | 889 | 761 | 681 | 590 | 480 | 406 | III (8–10) | 987 | 1060 | 1080 | 1080 | 1060 | 1030 | 971 | 887 | 762 | 680 | 539 | 477 | IV (10–20) | 1050 | 1130 | 1130 | 1130 | 1120 | 1070 | 1030 | 906 | 856 | 725 | 641 | 561 | V (more than 20) | 1140 | 1160 | 1160 | 1150 | 1130 | 1070 | 1030 | 908 | 856 | 737 | 676 | 564 |
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