Can cantilever beam be used as scaffold support? Why?

Yes, there is support. Cantilever beam is not a frame beam, the cantilever end of cantilever beam has no load, and its load is completed by the stress at the root of cantilever beam. A beam with one end buried or poured on the support and the other end protruding from the support is called a cantilever beam, which can be fixed, simply supported or free, with long-span gluten below and short-span gluten above.