Originally Posted by
Airmann
Might be. I see a lot of airports refer to aircraft limitations by wing span rather than code. But I wonder if that is because code includes wing span and wheel spacing and the airport is only interested in span limits?
If the main concern is wingspan, it still makes sense to use the code letter.
The only reason I can think for using actual wingspan is if an airport needs to make a finer demarcation than the code letter allows - for example code D (FAA Group IV) covers a huge range of spans from 36 m (118') to 52 m (171').