Question

The vertical distance between the lowest point on underside of a bridge superstructure and the highest flood level is called

Answer 1

Bridge : Bridge is a structure having a total length of above 6 m between the inner faces of the dirt walls for carrying traffic or other moving loads over a depression or obstruction such as channel, road or railway.

Answer 2

The vertical distance between the lowest point on the underside of a bridge superstructure and the highest flood level is called freeboard

Explanation:

• Freeboard is the distance between the bottom of the bridge superstructure and the highest flood level, or it is the vertical distance between the water level of the dam and the reservoir water level.
• The freeboard should be a minimum of 600 mm.