What do you understand from rooftop loads mentioned in TS498? What is meant by the attic and the room here? Can you imagine a[/u] attic room that is under the roof and no a deck above it? DUBLEX ROOMS BETWEEN THE ROOF WITHOUT FLOORING Aren't they considered loft rooms? Or even if there is an independent section between the roof, does it not fall into the class of attic rooms? What is the description of these loft rooms, for God's sake? If it doesn't fit any of the descriptions I listed above, why is TS498 also available? Best regards.... N.YILMAZ