Bike shed solutions/ideas?

[fazersharp]

slab to the level of the shed floor leaving a 40mm gap so no water runs in the shed,          then cut the jamb away apart from about 100mm each side and bolt them down.        don't  forget you can cross cut a slab to suit most levels..      have a look around where you live they have disabled access everywhere  same thing really.

Yep this would be my solution also, a slow rise of the slabs from the ones already there along with cutting the bottom of the doors off flush with the new slab level.