I tore out an upper cupboard to open my kitchen to my dining room. Now, for reasons of needed space I am converting my kitchen broom closet to a pantry type space. The problem is that this 1944 house is all plaster and installing those strips of metal to hold shelving does not work. But I look at the linen closet and those shelves are wood ledges on either side of the inside walls and then the shelf layed on top. Well, these ledges do not have nails in them and so do you suppose they just glued them to the plaster walls? HELP!