supply duct in garage.

1.Can you have a suppy duct in the garage. I say no because of firestop reasons but if you have a quote for this it would help. They have tried to convert the garage to a room but it is so improper and has so many concerns.
2.:roll:And can a flex gas line be on the ground with no suport in the garage if you look at the pic it is in the back behind the furnace.

2006 irc:

Thanks Michael