Free board in a bridge is the vertical distance between the
- Athe designed High Flood Level and the level of the crown of the bridge at its lowest pointCorrect
- Bthe designed High Flood Level and the level of the crown of the bridge at its highest point
- Cthe designed Low Flood Level and the level of the crown of the bridge at its lowest point
- Dthe designed Low Flood Level and the level of the crown of the bridge at its highest point
Solution
Concept
Freeboard
Step-by-step solution
1. Freeboard is measured from the design high flood level (HFL) to the lowest point of the bridge soffit/crown.
Explanation
Freeboard is measured from the design high flood level (HFL) to the lowest point of the bridge soffit/crown.
Shortcut
HFL to lowest point of the superstructure.
Correct answer: A) the designed High Flood Level and the level of the crown of the bridge at its lowest point