The weld axis is completely horizontal, and the plates are rotated so that they lean at roughly a 45-degree angle to the ground. This forms a natural, trough-like "V" shape where gravity pulls the molten puddle uniformly down into the root of the joint.
: The weld is performed from the underside of a horizontal joint. This is the most difficult position as the welder must directly fight gravity to prevent the molten metal from dripping or sagging. Technique and Best Practices Welding Positions Explained
: One plate is vertical and the other is horizontal. The welder applies the bead along the horizontal intersection. While easier than vertical or overhead, it requires a 45∘45 raised to the composed with power fillet welding positions
This is the bread and butter of shop fabrication. The axis of the weld is horizontal, but the weld face is vertical. You are welding "sideways."
In the 1F position, the weld is made on the upper side of the joint, with the weld face approximately horizontal. Gravity is actually your friend here—it helps hold the molten puddle in place. The weld axis is completely horizontal, and the
Because the weld isn't "inside" a deep groove, the position of the gun and your body is critical to ensuring the "throat" of the weld is deep enough and the "legs" are even.
Here are the four primary positions you need to know. This is the most difficult position as the
You might be thinking, "A weld is a weld, right?"