Ten open cubes spread across four tiers give this 51.5-in wide bookcase room for a whole shelf wall in one piece. Each bay measures 12 in square and 10 in deep, sized for a run of hardcovers, a fabric bin, a record crate, or a trailing plant, and the staggered tier heights keep the front face from reading as a plain grid. Top shelf sections carry 25 lbs each and every open cube is rated for 15 lbs. Two anti-tipping kits fasten the frame to the wall, screw hole covers hide the fasteners, and foot pads sit between the base and the floor.