Describe the four basic plate welding positions for grooves and fillet welds.
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The American Welding Society has divided plate welding into four basic positions for grooves (G) and fillet (F) welds as follows:
*Flat 1G or 1F-When welding is performed from the upper side of the joint, and the face of the weld is approximately horizontal.
*Horizontal 2G or 2F-The axis of the weld is approximately horizontal, but the type of the weld dictates the complete definition. For a fillet weld, welding is performed on the upper side of an approximately vertical surface. For a groove weld, the face of the weld lies in an approximately vertical plane.
*Vertical 3G or 3F-The axis of the weld is approximately vertical.
*Overhead 4G or 4F-When welding is performed from the underside of the joint.
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