The Monster™ Bed Frame is our strongest classic bed frame. It will work for twin, full, queen, king, and cal-king size mattresses. This heavy-duty bed frame features 2 inch tall reinforced extra thick side rails to prevent flexing. It also comes with a head to toe triple leg double beam center support that works in every size. This version of the Monster Frame comes with wheels and is ideal for carpeted flooring. Your mattress will be raised 7-1/2 inches off the ground.