ya I thought there would be enough by welding all sides. Just wanted to get some expert advice!
Also I'm doing my welds in small jabs, is this ok? I find if I do a continuos line it will blow a hole in edges.
Settings are low(2 on amps and 2 on feed)
On the outside of mitred corners on Box section I grind the two down together at 45* angle so there is some metal to actually weld to and not two sharp edges. it often also keeps the finished weld with in the profile of the corner.