80/20 Aluminum T-slot Building Systems – Build your Idea
If 80/20 is new to you, then you might also be unfamiliar with its steel channeled cousin, Unistrut. <a href="https://www.unistrut.us/" rel="nofollow">https://www.unistrut.us/</a><p>Unistrut is used extensively in the US to build support structures for electrical switchgear and process equipment. You can get grades suitable for outdoor and corrosives exposure.<p>Unistrut is the Kleenex term, there are a number of work-alike / fit-alike systems.<p>Then for round tube, there is Kee Klamp:  <a href="https://keesystems.com/" rel="nofollow">https://keesystems.com/</a>