Heaviest door
- Who
- National Institute for Fusion Science
- What
- 720 tonne(s)/metric ton(s)
- When
- December 1994
The world's heaviest door is the radiation shield door in the National Institute for Fusion Science at Toki, Gifu, Japan weighs 720 tonnes and is 11.73 m 38 ft 6 in high, 11.4 m 37 ft 5 in wide and 2 m 6 ft 7 in thick. It was installed in December 1994 by Itoki Co. Ltd.