I have a close friend who is a Structural Engineer. He pointed out to me that residental housing is not build to support the kind of weight, that a sizable amount of fabric can weigh. It is the weight that is not spread over the entire floor to dispurse the load that is the biggest concern. Shelving loads with fabric will create loads at a very specific point. For example if you have a shelf with four posts the weight is on the exact point where each of the four posts rests. To make matters worse I had it all on one wall ( really not a good thing to do). It was the furthest thing from my mind about the weight of fabric ( and it is heavy if you add it up).
Anyway... I moved all of my fabric and extensive amount of books to the basement and bought a de-humidifier. Now I can continue to "build" with out worry.