Ikitsuki Bridge Explained

Bridge Name:	Ikitsuki Bridge
Official Name:	Ikutsuki Bridge
Locale:	Ikitsuki, Nagasaki
Design:	Continuous truss bridge
Material:	Steel
Height:	18 metres
Mainspan:	400m (1,300feet)
Complete:	1991
Coordinates:	33.3531°N 129.438°W

The Ikitsuki Bridge is a continuous truss bridge that connects Ikitsuki to Hirado Island. Completed in 1991, it has a main span of 400abbr=offNaNabbr=off.^[1] It is the longest continuous truss bridge in the world.^[2]

History

The bridge allows automobile access from Ikitsuki to Hirado and the rest of Japan. Previously, the only option to travel off Ikitsuki was by ferry to various ports in Kyūshū.

In 2009, a crack which seriously damaged the safety of the bridge was found in a diagonal member near an 27 intermediate pier during an inspection for determining points to be annually inspected.^[3] The crack grew to be 20 cm long, and was thought to be caused by wind-induced vibrations.

See also

• List of longest continuous truss bridge spans
• Truss bridge

References

^[4]

Notes and References

1. Book: Civil Engineering in Japan, Volumes 29-31. 1990. Japan Society of Civil Engineers. 183.
2. Web site: Archived copy . www.aisc.org . 22 May 2022 . https://web.archive.org/web/20020601114245/http://www.aisc.org/Content/ContentGroups/Documents/NSBA5/20_NSBA_LongestSpans.PDF . 1 June 2002 . dead.
3. Wang . Q. . Nakamura . S. . Okumatsu . T. . Nishikawa . T. . 2017-02-01 . Comprehensive Investigation on the Cause of a Critical Crack Found in a Diagonal Member of a Steel Truss Bridge . Engineering Structures . 132 . 0 . 0141-0296.
4. Web site: Ikitsuki Bridge | bridge, Japan.