Man-made Rafts
Traditional or primitive rafts are constructed of wood or reeds. Modern rafts may also use pontoons, drums, or extruded polystyrene blocks. Inflatable rafts use durable, multi-layered rubberized fabrics. Depending on its use and size, it may have a superstructure, masts, or rudders.
Timber rafting is used by the logging industry for the transportation of logs, by tying them together into rafts, and drifting or pulling them down a river. This method was very common up until the middle of the 20th century but is now used only rarely.
The type of raft used for recreational rafting is almost exclusively an inflatable boat, manufactured of flexible materials for use on whitewater.
Read more about this topic: Raft
Famous quotes containing the word man-made:
“No other man-made device since the shields and lances of the ancient knights fulfills a man’s ego like an automobile.”
—Sir William Rootes (1894–1964)