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The line every weld symbol hangs on.
Also known as: Reference line welding, Weld symbol baseline
The horizontal line of a welding symbol, carrying the joint symbols above and below it.
Carries the welding symbols, with position above or below the line determining which side of the joint they apply to.
Contexts: Technical drawing
Always drawn horizontal even when the joint runs vertically or at an angle, because the above-and-below convention would otherwise become ambiguous — the line's orientation is fixed so that its two sides always mean the same thing.
Contexts: Technical drawing
The single element without which no other welding symbol can be read, which is why it is authored first.
Contexts: Technical drawing
A horizontal line with an arrow at one end, drawn always horizontal regardless of the orientation of the joint it describes.