Heavy Duty Two Legged Middle Frame Fitting 2-3/8" legs. These are for schedule forty 2" pipe and have set screws to match the 2 legged end frame fittings, needed for sets with over two swings. To figure the length of pipe needed: SIN of 65 degrees= .96 = Height. Divide by length of pipe. For example a ten foot pipe would be 8 ft 10" above the ground. Holds up to 5000 lbs.