Here is a link to the pattern for the basic wall hanging rack.
http://www.woodstore.net/swqura.html
I made the backing piece in the corner wider than the article called for and cut a 45 degree angle on the sides so it would fit in the corner. I also put a wide piece of wood on top of the arms and rounded them over to help keep creases from forming in the quilts..
Looking forward to seeing your new racks in the future.