When working in the 3F position, the direction of travel changes the physical properties and difficulty of the weld:
You generally cannot drag a straight bead vertically without the puddle becoming unmanageable. You must manipulate the electrode: welding 3f
Removing too much base metal at the edges without filling it back in. When working in the 3F position, the direction
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: Refers to a Fillet weld (a weld of approximately triangular cross-section joining two surfaces at right angles). When working in the 3F position
In vertical down welding, the slag can get trapped underneath the weld bead if the welder isn't moving fast enough. Training and Certification