Trampoline frame
They should be fully galvanised inside and out to protect them from the weather. Of course, they should be easy to assemble in case you need to take them down, or move them. The thickness of the steel should be between 1.5mm and 2mm.The weakest point on any frame is the welded leg sockets on the toprail. This is not a problem on the heavy frames (i.e.2mm thickness, 48mm diameter). On lighter narrower frames however, a three way 'T-Junction' leg socket is the strongest and safest option.It's box joint construction gives rigidity,and the additional 2mm of steel added strength. Extra welded steel plates alone offer little additional strength.