Swing Frame Fittings What Is A Wooden Swing Set Called That Is Not An A-frame?

What is a wooden swing set called that is not an a-frame? - swing frame fittings

I would like to build my twin 1-year two years a simple wooden porch, but I was thinking of something other than the traditional concept of a frame. Who knows what a swing with two 4x4 or 6x6 concrete request and keep on the swing? Well, everyone knows something about this kind of swing or sites that have information. Thanks