Here is the progression that I’ve been making since I started ths course.
The joint on the left is a lap joint: connection two offset pieces by welding the edge of one to the middle of the other while both are parallel.
The middle joint is a fillet weld: two pieces connected at the edges at a 90 degree angle, or whichever angle is necessary.
The right joint is a T-joint: the edge of one piece connected to the face of another at a 90 degree angle, welded on both sides. This is by far the trickiest to date because once you’ve welded one joint the nature of welding the second joint changes. There is extra metal on the other side of the joint, thus the torch has to work harder to heat the metal to make it liquid.
I shall continue to post when I make further progress. Or I may post every day, I’m not sure.