It's a rather unusual tuning maybe -must be about the hard-bending- but if you know songs on it write it down.

I got only two:

Airbourne - Girls In Black
Aerosmith - Janie's Got A Gun
As in 1/2 step up? I can think of dropped to F and open F, but no 1/2 step up. Thats crazy in terms of tension it would seem. I use 10s and 11s though