Rama IX Bridge

Rama IX Bridge is a bridge in Bangkok, Thailand over the Chao Phraya River. It connects the Yan Nawa District to Rat Burana District as a part of the Dao Khanong – Port Section of Chalerm Maha Nakhon Expressway.[1][2][3]

Rama IX Bridge

สะพานพระราม ๙
Coordinates13.682058°N 100.519001°E / 13.682058; 100.519001
Carries6 lanes of roadway
CrossesChao Phraya River
LocaleBangkok, Thailand
Characteristics
Designcable-stayed
Total length781.20 m
Width33 m
Height87 m
Longest span450 m
Clearance below41 m
History
Construction start1 October 1984
Opened5 December 1987

The bridge was named in the honor of King Bhumibol Adulyadej's 60th birthday. The opening date coincides with the king's birthday. It was the first cable-stayed bridge in Thailand[1] and had the second-longest cable-stayed span in the world when it opened in 1987.[4][5]

The original colour scheme, with white pylons and black cables, was replaced with an all yellow scheme representing the king in 2006.[6][7]

Bridge structure
View of Rama IX Bridge

The steel superstructure includes the bridge, rigged mast, and cable. The main span of the bridge, which is stretched between two poles, has a length of 450 meters. The main span is a trapezoid 33 meters wide. The bridge has a walkway along its side. The bridge has two main pylons 3 x 4.50 meters. This serves to hold the tension of the cable and weight into the pylon pier. The 121 – 167 mm diameter cables consist of many small wires wound together. The cables vary in length from 50 to 223 meters can absorb the tension for 1,500–3,000 tons.[8]

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See also

References
  1. "Rama IX Bridge". Expressway and Rapid Transit Authority of Thailand. Retrieved 1 February 2008.
  2. https://www.terrabkk.com/news/154572/%E0%B8%AA%E0%B8%B0%E0%B8%9E%E0%B8%B2%E0%B8%99%E0%B8%9E%E0%B8%A3%E0%B8%B0%E0%B8%A3%E0%B8%B2%E0%B8%A1-9-%E0%B8%99%E0%B8%A7%E0%B8%B1%E0%B8%95%E0%B8%81%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%81%E0%B9%88
  3. https://www.homenayoo.com/pr-1219/
  4. "Rama IX Bridge – 10th Year Inspection & Evaluation". OPAC Consulting Engineers. 2001. Retrieved 1 February 2008.
  5. https://today.line.me/th/pc/article/%E0%B8%81%E0%B8%97%E0%B8%9E+%E0%B9%80%E0%B8%9A%E0%B8%B5%E0%B9%88%E0%B8%A2%E0%B8%87%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%88%E0%B8%A3%E0%B8%B2%E0%B8%88%E0%B8%A3%E0%B8%9A%E0%B8%A3%E0%B8%B4%E0%B9%80%E0%B8%A7%E0%B8%93%E0%B8%AA%E0%B8%B0%E0%B8%9E%E0%B8%B2%E0%B8%99%E0%B8%9E%E0%B8%A3%E0%B8%B0%E0%B8%A3%E0%B8%B2%E0%B8%A1+9+%E0%B8%97%E0%B8%B2%E0%B8%87%E0%B8%9E%E0%B8%B4%E0%B9%80%E0%B8%A8%E0%B8%A9%E0%B9%80%E0%B8%89%E0%B8%A5%E0%B8%B4%E0%B8%A1%E0%B8%A1%E0%B8%AB%E0%B8%B2%E0%B8%99%E0%B8%84%E0%B8%A3-v93p6j
  6. "Strength in yellow". The Nation. 10 May 2006. Archived from the original on 1 August 2017. Retrieved 1 February 2008.
  7. https://www.thairath.co.th/content/394647
  8. Ramkhamhaeng University Library staff (5 November 2008). "Rama9 Bridge" Ramkhamhaeng University Library.Retrieved 20 October 2013.From http://www.lib.ru.ac.th/journal/bangkok/rama9.html


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