We have an old round topped barn that was used a a hog house years ago.  Measures approx 28x60 and has a hay loft, which I would like to remove to make the building more useable.  My question is, can I just take the loft out and leave things be or do I need to do some bracing up above the loft?  The curved wall and ceiling 'studs' are all one piece with just one hole in them where the floor 'truss' is hooked in, the loft is supported by steel beams down to concrete pillars that are on the floor.  I'd like to put a big door in the end and there is another slider on the opposite end, but on the side and would either fill that in when we steel it or put in another overhead door.  Any tips would be appreciated.  The old girl needs a makeover outside and may just as well do the whole thing while we are at it.  Thanks, Ben