Classification of Wing Walls
Wing walls can be classified according to their position in plan with respect to banks and abutments. The classification is as follows:
1.Straight Wing walls: They are used for small bridges, on drains with low banks and for railway bridges in cities (weep holes are provided).
2. Splayed Wing walls: These are used for bridges across rivers. They provide smooth entry and exit to the water. The splay is usually 45°. Their top width is 0.5 m, face batter 1 in 12 and back batter 1 in 6, weep holes are provided.
3. Return Wing walls: They are used where banks are high and hard or firm. Their top width is 1.5 m and face is vertical and back battered 1 in 4. Scour can be a problem for wing walls and abutments both, as the water in the stream erodes the supporting soil.
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Famous quotes containing the words wing and/or walls:
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—Charles Dickens (1812–1870)
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Lined with a skin as soft as silk,
Within a fountain crystal-clear,
A golden apple doth appear.
No doors there are to this stronghold,
Yet thieves break in and steal the gold.”
—Mother Goose (fl. 17th–18th century. In marble walls as white as milk (Riddle: An Egg)