I have a home build in the 1880's in Central Pennsylvania and the Attic at the highest point is 6 feet. The attic is the standard triangle shape with nothing in the middle. We would like to make this area into more storage space but to make it comfortable we would like to drop the attic floor (so it is right above our interior suspension celiing). Is this strucurally sound to do? I have never seen a house that has a long triangle and I don't want the roof to cave in. Thanksfor the help.