| 词条 | Eldean Covered Bridge |
| 释义 |
| name = Eldean Covered Bridge | nrhp_type = nhl | image = Eldean Covered Bridge.jpg | caption = Photo in 2002 by Jet Lowe | location = Eldean Rd. over the Great Miami River. | nearest_city= Troy, Ohio | coordinates = {{coord|40|4|40|N|84|13|0|W|display=inline,title}} | locmapin = Ohio#USA | built = {{start date|1860}} | architecture = Long truss | added = February 20, 1975 | area = less than one acre | governing_body = Local | refnum = 75001492[1] | designated_nrhp_type = December 23, 2016 }} The Eldean Covered Bridge is a historic covered bridge spanning the Great Miami River in Miami County, Ohio north of Troy. Built in 1860, it is one of the nation's finest surviving examples of a Long truss, patented in 1830 by engineer Stephen H. Long. At {{convert|224|ft|m}} in length for its two spans, it is the longest surviving example of its type.[2] It was listed on the National Register of Historic Places in 1975,[1] and was designated a National Historic Landmark in 2016.[3] Description and historyThe Eldean Covered Bridge is located north of the city of Troy, spanning the Great Miami River between Concord Township and Staunton Township on a now-bypassed segment of County Road 33. It is a two-span structure, mounted on cut stone abutments and a central pier. The western abutment and central pier have been capped in concrete, and the pier has a cutwater feature on its northern (upstream) side. The total structure length is {{convert|231|ft|m}}, with each span about {{convert|108|ft|m}} and {{convert|21|ft|m}} wide. The roadway has a width of {{convert|17|ft|m}} and a maximum clearance of {{convert|13|ft|m}}. The bridge is covered by a gabled metal roof, and its exterior is finished in vertical board siding, with small square openings framed on each side to admit light.[4] County Road 33 was laid out in 1847, providing access to a hamlet originally serving the Miami and Erie Canal to the east. The present bridge was built in 1860, and is the second to stand on the site. The bridge trusses were built to a patented design by engineer Stephen H. Long. The Long truss was the first truss structure to be designed using engineering principles, and it introduced the idea of prestressed elements which are used to counteract active load on the structure. This bridge is one of the finest and least-altered examples of this truss type.[4] With the demise of the Old Blenheim Bridge in New York, it is also the longest example of the type. On December 23, 2016, the Eldean Covered Bridge was designated a National Historic Landmark. See also
References1. ^1 {{NRISref|version=2010a}} {{National Register of Historic Places}}{{National Register of Historic Places in Ohio}}2. ^http://www.waymarking.com/waymarks/WM40GG_Eldean_Covered_Bridge_Troy_Ohio 3. ^{{cite web|url=https://www.nps.gov/nr/listings/20170303.htm|title=Weekly list of actions 2/16/2017 through 3/2/2017|publisher=National Park Service|accessdate=2017-03-09}} 4. ^1 {{cite web|url=https://www.nps.gov/nhl/news/LC/fall2016/EldeanBridge.pdf|title=Draft NHL nomination for Eldean Covered Bridge|publisher=National Park Service|accessdate=2018-02-22}} 11 : Covered bridges on the National Register of Historic Places in Ohio|Bridges completed in 1860|Transportation in Miami County, Ohio|National Register of Historic Places in Miami County, Ohio|Covered bridges in Ohio|Buildings and structures in Miami County, Ohio|Road bridges on the National Register of Historic Places in Ohio|Road bridges in Ohio|National Historic Landmarks in Ohio|Wooden bridges in Ohio|Long truss bridges in the United States |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。