This photo from 1979 shows a Lawrence Livermore National Laboratory employee opening the world's heaviest hinged door.
It was 2.5 m (8 ft) thick, nearly 3.7 m (12 ft) wide, and weighed 44 tons (97,000 lbs). 
This photo from 1979 shows a Lawrence Livermore National Laboratory employee opening the world's heaviest hinged door.
It was 2.5 m (8 ft) thick, nearly 3.7 m (12 ft) wide, and weighed 44 tons (97,000 lbs).
Heaviest hinged door we know of so far.
There is probably some big bumb door that dwarfs it. 🚇
