You can make any size of A-Frame style structure out of conduit, by purchasing the 90 degree elbows, two for each purlin. Put one at the top and saw the other one in half to make two 45s for the side angles. 1.5" metal emt conduit will slide into 1 3/8" chain link top rail. (the conduit measure is of interior diameter and the top rail is measured by outside diameter)
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