Heaviest man-made mobile object
- Who
- Troll A offshore gas platform
- What
- 656000 tonne(s)/metric ton(s)
- Where
- Not Applicable (North Sea,)
- When
- 1991
The Troll A offshore gas platform, located off Norway in the North Sea, is the heaviest man-made mobile object ever, with a dry weight of the gravity base structure at 656,000 tonnes. Standing 369 m tall, it was made from 245,000m³ of concrete (the equivalent to 215,000 foundations for ordinary homes) and 100,000 tonnes of steel (approximately 15 Eiffel towers).
Owned by Shell Oil , the platform was constructed by Norwegian Contractors from July 1991 at a cost of NOK4,150million.