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Dutch sand ladder : ウィキペディア英語版 | Dutch sand ladder
A Dutch sand ladder is a cable or rope ladder with rungs usually made of wood, lying on a sandy slope to allow persons to ascend or descend with minimal erosion. The bottom end is anchored and the top end is designed for easy disconnection so that the ladder can be lifted up to shake loose any sand that has accumulated on the rungs. The ability to be easily maintained and reset makes sand ladders useful trail features for steep sand dunes or other easily eroded areas where permanent structures are infeasible or impractical. ==External links==
* Discussion of Dutch sand ladders, boardwalks, and other walkway constructions for sand dune access management, illustrated * (''Grist'' Spring 1984 Volume 28/Number 2 ) Use of Dutch Sand Ladders in Fort Funston, illustrated
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Dutch sand ladder」の詳細全文を読む
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