Research symptoms & diagnosis of Coma: 1  Overview -- Coma. 2  Diagnostic Tests for Coma. 3  Home Diagnostic Testing. 4  Complications -- Coma. 5  Doctors & Specialists. 6  Misdiagnosis and Alternative Diagnoses. 7  Hidden Causes of Coma. 8  Other Causes -- causes of these or similar symptoms.
For most shelves made from 3/4 inch stock, a practical span is 30 to 36 inches. Shelf depth is determined by the size of the items to be stored, generally within the range of 6 to 24 inches. Shelf depth for a general purpose bookshelf is usually 10 to 12 inches. Shelf spacing will generally range from 7 to 15 inches with 8 to 12 inches being common for bookshelves. To prevent the case from looking and being top-heavy, use a smaller shelf spacing near the top and a larger one near the bottom.
Bookcase shelves can sag if the fasteners or joints fail. For single, rectangular free-standing bookcases with two sides and a top, it's best to dado the shelves into the vertical jambs on either side. Dadoes are small channels cut on a table saw to receive the ends of the shelves on both sides.