Great space saver offering 41 inch of underneath clearance. Bed includes slats to support mattress. Box spring not required. Vertica support ties bed together for greater sway strength and safety. . Length: 78 x Width: 44 x Height: 57 . 16 slats per bunk bed included prevents center sag allows circulation and support for mattress. 5.25 Mattress Rails. Made of solid Aspen Hardwood construction for longevity durability and strength. Constructed with extra reinforcements for added stability. 5 Year Warrantee. Fully conform to US Safety Standards and exceed CSA recommendations