The span of the dome can reah more than 30 feet across depending on materials used. Single point fastening is preferred to ensure structural integrity and the least amount of torque stress on joints. This uses fewer parts and is faster to assemble. An 11.8 foot radius dome (using 10 foot stock conduit) can be built for lass than $200 in materials.
Single Point Connector Large 4v Style 3v Style 3v 24 Foot Diameter Dome