A trampoline has a trampoline bed, a set of trampoline springs, and a trampoline frame retaining the trampoline bed. The trampoline frame has a horizontal tube frame. The horizontal tube frame is made in sections. A corrugated upper surface is formed on the horizontal tube frame including an inside tube connected to an outside tube. An inside tube has an inside tube wave top and an outside view has an outside tube wave top. Preferably, the horizontal tube frame further includes a corrugated lower surface formed on the inside tube and on outside tube so that the inside tube has an inside tube wave bottom and the outside tube has an outside tube wave bottom.