…Suspension bridges are a typical example of cable structures, and suspension bridges made from natural materials such as ivy have been used for a long time. In the 18th and 19th centuries, cables were made of chains or eyebars (steel bars with round holes at the ends), but after the second half of the 19th century, the appearance of high-strength steel wire made it possible to build suspension bridges with long spans. Cable structures are also used in the field of architecture, by lifting floors and roofs or forming roof surfaces with the cables themselves. … *Some of the terminology that mentions "Ivor" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…つり橋はケーブル構造の典型例で,ツタなどの自然材料を用いたつり橋はかなり古くから用いられていた。18~19世紀にはケーブル材料として鎖やアイバー(先端部に円形の穴のあいた鋼棒)を継いだものが用いられていたが,19世紀後半以降,高強度鋼ワイヤの出現などに伴い,長大スパンのつり橋の建設が可能となった。 床や屋根をつり上げたり,ケーブル自身で屋根面を構成することにより,ケーブル構造は建築の分野でも用いられる。… ※「アイバー」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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