China Naming Network - Almanac query - How to calculate the length of the bridge?
How to calculate the length of the bridge?
1. Span classification:
classify
Total length of porous span L(m)
Single hole span Lk(m)
bridge
L > 1000
Lk ≥ 150
bridge
100 ≤ L< 1000
40 ≤ Lk≤ 150
intermediate axle
30 < L< 100
20 ≤ Lk