The Washington Monument Capstone – Evolution D.C.
2023年3月28日 · It is unsurprising that the Washington Monument, similar to architecture all around the capital, was built with marble. What may surprise you is that the capstone resting on the top of the monument is made of a $225 pyramid of aluminum. At just under nine inches tall and 100 ounces, the capstone was the largest piece of solid aluminum when it ...
A History of the Aluminum Cap of the Washington Monument
Such was the case of the small but very expensive aluminum pyramid that was set atop the Washington Monument on its completion in 1884 to serve the functional purpose of a lightning rod. In retrospect, this can be considered a watershed event in the subsequent emergence of the modern massive aluminum industry .
The Point of the Matter - U.S. National Park Service
On a breezy December 6, 1884, the 36-year construction of the Washington Monument was completed with the placing of an 8.9 inch tall, 100-ounce pyramid of solid aluminum atop the capstone. Why not silver or gold?
Washington Monument - Wikipedia
The Washington Monument is a hollow Egyptian-style stone obelisk with a 500-foot-tall (152.4 m) column surmounted by a 55-foot-tall (16.8 m) pyramidion. Its walls are 15 feet (4.6 m) thick at its base and 1 + 1 ⁄ 2 feet (0.46 m) thick at their top.
Why is There a Pyramid Atop the Washington Monument? - Mental Floss
2012年8月1日 · Frishmuth cast a cap that he called a “perfect pyramide of pure aluminum," weighing in at 100 ounces and standing nine inches tall.
Pyramidion - Wikipedia
A pyramidion (plural: pyramidia) is the capstone of an Egyptian pyramid or the upper section of an obelisk. [1] Speakers of the Ancient Egyptian language referred to pyramidia as benbenet [ 2 ] and associated the pyramid as a whole with the sacred benben stone .
华盛顿纪念碑 - 维基百科，自由的百科全书
5 天之前 · 华盛顿纪念碑（英语： Washington Monument ），是位于美国首都华盛顿哥伦比亚特区的地标，为纪念美国总统 乔治·华盛顿而建造，石碑建筑物由大理石、花岗岩和青石片麻岩制成，其内部中空，是世界最高的石制建筑，也是世界上最高的方尖碑。
The Cast Aluminum Cap on the Washington Monument
2012年10月6日 · Instead, a simple cap made of a strong, light, corrosion-resistant, and very rare metal—aluminum—was chosen to complete the monument. The cap, the largest aluminum casting of its time, was named a Historical Landmark of ASM International during ceremonies at the monument on November 15, 1984.
George Washington Monument Apex - Our Lost Founding
2020年12月6日 · On this day in 1884, the 3,300-pound marble capstone and nine-inch pyramid of cast aluminum is placed atop the Washington Monument. This completed construction of the world’s tallest stone structure and the world’s tallest obelisk, at 555′ 5 1/8″.
Washington Monument: 1888
The Washington Monument is located at the west end of the National Mall in Washington, DC, and honors the first President of the United States, George Washington (1732-1799). It is a tall, four-sided stone structure called an obelisk, and it is modeled after classical monuments found in ancient cultures.