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An umbrella or parasol is a folding canopy supported by wooden or metal ribs that is mounted on a wooden, metal, or plastic pole. It is usually designed to protect a person against rain . The term umbrella is traditionally used when protecting oneself from rain, while parasol is used when protecting oneself from sunlight, though the terms ...
Anchors are sometimes fitted with a trip line [13] attached to the crown, by which they can be unhooked from underwater hazards. The term aweigh describes an anchor when it is hanging on the rope and not resting on the bottom. This is linked to the term to weigh anchor, meaning to lift the anchor from the sea bed, allowing the ship or boat to move.
The Umbrellas, 1991, Japan Photograph of the yellow umbrellas of the 1991 Christo and Jeanne-Claude project in California. Photo by Robert S. McCombs. The Umbrellas, Japan–USA, 1984–91 was a 1991 environmental artwork in which artists Christo and Jeanne-Claude erected yellow and blue umbrella structures in California (between Gorman and Grapevine [1]) and Japan, respectively.
A deep-penetrating anchor (DPA) is conceptually similar to a torpedo anchor: it features a dart-shaped, thick-walled, steel cylinder with flukes attached to the upper section of the anchor. A full-scale DPA is approximately 15 metres (49 ft) in length, 1.2 metres (4 ft) in diameter, and weighs on the order of 50–100 tonnes (49–98 long tons ...
The magnitude of total anchor force required in the tieback can be determined by analyzing the soil and groundwater properties as well as sources of external loads applied to the system. [ 2 ] The bond length of the tieback must extend beyond the potential critical failure surface of the soil.