Versatility at its finest! From bookshelf, to floating shelf, to kitchen cabinet replacement, this shelf is the answer. With the popular open concept shelving style, this shelf is all you need. The Universal Shelf System by Federal Brace is designed to create floating shelves and be installed in ceiling joists to create open kitchen shelving using 3/8" lag screws. Add your own shelving board in 11-7/16" width to create a one of a kind shelving system. Set at no greater than 48" span, a pair of the universal shelving brackets will support up to 200 pounds. Create a custom desk or bookcase/shelving unit by installing on the floor. Attaching shelving boards using the 1" slots gives the unit stability and a carrying capacity of 350 pounds per pair when spaced at a 48" span or less.