Hi all,
I am planning a couple of bookshelves to be made from a 1/2 inch plywood,
35x11 inches in size; some shelves will be fixed in 1/4 inch deep dadoes in the sides of the bookcase and others will be "floating", supported by pins inserted in 1/2 inch deep holes. The shelves will only be supported on the sides; not along the length. Should I worry about the sag of the plywood? What's a good length of the shelf that can sustain a load full of books without additional lengthwise support? Thanks! Vlad