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Two parallel uprights.
The welding symbol for a square butt weld, made between two square-cut edges set with a small gap.
Specifies a square butt weld, made between two square-cut edges set with a small gap.
Contexts: Technical drawing
The simplest preparation and the cheapest, requiring no edge machining — the symbol's plainness matches the joint's, which is true across the whole preparation set.
Contexts: Technical drawing
Two short parallel vertical lines crossing the reference line.
A fuller structured visual breakdown is not yet documented for this symbol.