1 - Use blocks for each floor, cut and view. Able to insert in different scales.
http://picasaweb.google.es/lh/photo/BgETLW0YMaFum_mc9WbzRg?authkey=FwtBimo82vw&feat=embedwebsite
2 - Use accumulated dimension
http://picasaweb.google.es/lh/photo/JFFqI9HdsfY5K0wCEgj9FA?authkey=FwtBimo82vw&feat=embedwebsite
Sincerely, thank you.
