Roebling, John Augustus

Japanese: レーブリング（英語表記）Roebling， John Augustus

Born June 12, 1806 in Mühlhausen, Prussia
[Died] July 22, 1869, Brooklyn. German-born American bridge engineer. After graduating from the Polytechnic School in Berlin, he moved to the United States in 1831 and became a naturalized citizen. He established a steel cable manufacturing company in Trenton, New Jersey. He developed a method of erecting suspension bridges in the air, and built four suspension bridges, including the Niagara and Cincinnati bridges, in the 1850s and 1860s. This method involved bundling several 5mm diameter piano wires directly at the bridge construction site to make the cables. Compared to the factory-made twisted wires used up until then, this method saved the trouble of transportation, did not lose tension due to twisting, and allowed the bridges to be built longer, which contributed to the dramatic progress of long-span suspension bridges. He was later selected as the chief engineer for the construction of the Brooklyn Bridge in New York City, and began work in 1868, but died the following year in an accident during construction.

Rebling
Roebling, Washington Augustus

Born May 26, 1837 in Saxonburg, Pennsylvania.
[Died] July 21, 1926. Trenton, New Jersey. American bridge engineer. Eldest son of bridge engineer John Augustus Rebling. After graduating from Rensselaer Polytechnic Institute in 1857, he helped his father with his work. He served in the Union Army during the Civil War. After his father's death in 1869, he took over as chief engineer for the construction of the Brooklyn Bridge, and was particularly devoted to the development of the caisson construction method (→ caisson foundation method). The health hazards of working in a high-pressure environment were not yet well known, and he himself suffered from severe decompression sickness, but he took charge of the construction from his sickbed and completed the Brooklyn Bridge in 1883.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

[生]1806.6.12. プロシア，ミュールハウゼン
[没]1869.7.22. ブルックリン
ドイツ生れのアメリカの橋梁技術者。ベルリンの工芸学校を卒業後，1831年アメリカに渡り，帰化した。ニュージャージーのトレントンで，鋼索製造会社を設立。吊橋をケーブルで架設する空中架設法を開発，1850年代から 60年代にかけてナイアガラ，シンシナティなど4つの吊橋を建設した。この方法は，直接，橋梁架設現場で，直径 5mmのピアノ線を何本も束ねてケーブルとするもので，それまでの工場製の撚線に比べて，運搬の手間が省け，撚 (よ) りの戻りによる張力の損失がなく，長くつくれるので，長大吊橋の飛躍的進歩に貢献した。その後ニューヨーク市のブルックリン橋の建設では主任技師に選ばれ，68年着手したが，工事中の事故が原因で翌年死亡した。

レーブリング
Roebling, Washington Augustus

[生]1837.5.26. ペンシルバニア，サクソンバーグ
[没]1926.7.21. ニュージャージー，トレントン
アメリカ合衆国の橋梁技術者。橋梁技術者ジョン・オーガスタス・レーブリングの長男。1857年レンセラー工科大学を卒業後，父の仕事を手伝う。南北戦争で北軍に従軍。1869年に父が死亡するとブルックリン橋建設の主任技師を引き継ぎ，特に潜函を用いた工法の開発に尽力した（→ケーソン基礎工法）。高圧環境での作業がもたらす健康障害はまだよく知られておらず，みずから重症の減圧症にかかったが，病床から指揮をとり，1883年ブルックリン橋を完成させた。

出典　ブリタニカ国際大百科事典小項目事典ブリタニカ国際大百科事典小項目事典について　情報

<<: Liviu Rebreanu

>>: Reprise (English spelling)