The step by step guidelines here are for a six band hexagonal beam. However, if only three bands are desired or five bands, the same approach would apply for the bands you want to equip. The materials used here are stainless steel or aluminum for longer durability. Sources for most parts are on line and are provided on the Parts page.
The approach in this site is to explain five steps for building the components shown below and then Step 6 outlines how they are all assembled into a hexbeam.