trestlework
/ˈtrɛsəlˌwɜrk/
noun
- A structure made of a series of connected frames (trestles) used to support a bridge, railway, or other elevated pathway.
- The old railway crossed the valley on a tall wooden trestlework.
- The hiking trail passed beneath a massive trestlework that once carried trains.
- Engineers inspected the trestlework for signs of rot after the heavy rains.