Because of the modular design of standard fittings, assembly is easy, only simple hand tools are required, and risks from welding a structure are eliminated.
Other advantages of using structural pipe fittings are easy installation and reconfigurable design.
[1] Since there are no permanent welds in the structure, the set screws of the fittings can simply be loosened,[2] allowing them to be repositioned.
Fittings used for strong structures are galvanised malleable iron castings, and come in many styles such as elbows, tees, crosses, reducers and flanges.
The fittings are not threaded; they simply lock onto the pipe with the supplied hex set screws.