Show Solutions 6 meter (19.68 ft OD/17.78 ft ID), 8 sections

A conical circle truss built from 290mm by 290mm sections, 6 meters across, supplied as eight arc segments. Outer diameter is 19.68 feet and inner diameter is 17.78 feet. Eight sections means each segment covers 45 degrees, which keeps individual pieces to a manageable transport length and lets a crew build partial arcs when a full circle is not called for. Conical connections use the tapered spigot and pin system rather than bolted plates, so assembly at height is quicker than a bolted equivalent.