Furniture having a structural frame with at least one pair of opposing u-shaped rails adapted to receive a replaceable section that is slid into the rails and supported by the rails and one or more slats. The replaceable section can, optionally, be locked in place once it has been inserted. Because a replaceable section easily slides into its u-shaped rails, it is quick and easy to replace such sections, which can be made of less expensive and less sturdy construction than the solid structural frame.