That's simple: The Bed Beam Center Support System is far superior to wooden bed slats. Old fashioned wood slat systems do not properly support today's heavyweight bedding. When weight is applied to wood bed slats, the side rails bow outward, leading to support failure. The Bedbeam Bed Frame Support legs are made of a high-tech reinforced composite material with interlocking ribs that lock securely in place. This means your mattress and box spring are properly supported.