Rama IX Bridge

Rama IX Bridge
Coordinates 13°40′55″N 100°31′08″E / 13.682058°N 100.519001°E / 13.682058; 100.519001Coordinates: 13°40′55″N 100°31′08″E / 13.682058°N 100.519001°E / 13.682058; 100.519001
Carries 6 lanes of roadway
Crosses Chao Phraya River
Locale Bangkok, Thailand
Characteristics
Design cable-stayed
Total length 781.20 m
Width 33 m
Height 87 m
Longest span 450 m
Clearance below 41 m
History
Construction start 1 October 1984
Opened 5 December 1987

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]

The bridge was named in the honour 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.[2]

The original colour scheme, with white pylons and black cables, was replaced with an all yellow scheme representing the king in 2006.[3]

Bridge structure

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 metres. 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.[4]

See also

References

  1. 1 2 "Rama IX Bridge". Expressway and Rapid Transit Authority of Thailand. Retrieved 2008-02-01.
  2. ↑ "Rama IX Bridge - 10th Year Inspection & Evaluation". OPAC Consulting Engineers. 2001. Retrieved 2008-02-01.
  3. ↑ "Strength in yellow". The Nation. 2006-05-10. Retrieved 2008-02-01.
  4. ↑ Ramkhamhaeng University Library staff (5 November 2008). "Rama9 Bridge" Ramkhamhaeng University Library.Retrieved 2013-10-20.From http://www.lib.ru.ac.th/journal/bangkok/rama9.html


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