Surely the bridge has to be high enough to cope with the worst case of a collapsed nose gear? – Just like evacuation slides have to be long enough.
B747-400 Wing span 64.44m (211ft 5in), length 70.67m (231ft 10in), height 19.41m (63ft 8in).
A380-800 Wing span 79.8m (261ft 10in), length 73m (239ft 6in). Height 24,1 m (79ft 1in)
Guess the 380 will not fit!