Is there any way to make bolted connections (T-shape, L-Shape etc) for rectangular or square steel tubes to avoid welding but also achieve modularity of the structure?
Threaded tube inserts can help a lot but i am not sure about the rigidity of the final structure because they are plastic.
Any other techniques or recommendations?
I interested in joining square or rectangular hollow sections. Not cylidrical pipes or strut profiles.
-For example i have found this solution that needs only two holes - one for each tube - and two threaded pieces of metal.
-Same logic for pre-drilled profiles
Another solution is to directly weld a piece of threaded metal at the end of each tube