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:
“Two such as you with such a master speed
Cannot be parted nor be swept away
From one another once you are agreed
That life is only life forevermore
Together wing to wing and oar to oar.”
—Robert Frost (1874–1963)
“As I sat before the fire on my fir-twig seat, without walls above or around me, I remembered how far on every hand that wilderness stretched, before you came to cleared or cultivated fields, and wondered if any bear or moose was watching the light of my fire; for Nature looked sternly upon me on account of the murder of the moose.”
—Henry David Thoreau (1817–1862)