3.2 Crossings – Drift Deck River Crossings (2.0)

Summary

This guide covers drift decks which river are crossing structures designed for flood water to overtop the structure carriageway. They can be a series of open bottomed inverted “U” precast concrete components, or a series of rectangular concrete box segments. Each segment is secured to each other, or for the length of the structure. Those with an open bottom typically need a concrete base or piers for support and as an anchor.