I want to use a queen sized quilt as a decorative wall hanging. I have old lath and plaster walls. What I am thinking is to mount the quilt hanger near the ceiling and affix it to the beam there (much in the same way the Victorians used to hang their mammoth pictures.) I don't know the under structure of a L&P wall...can I, with some certainty, find a beam near the ceiling that will support my quilt? How do I locate this beam without punching big holes in those delicate walls? Thanks