How is a welding symbol read on a drawing (arrow and reference line)?

How is a welding symbol read on a drawing (arrow and reference line)?

• A. The arrow points to the weld location; the reference line carries the joint design; symbols above/below indicate weld type and size.
• B. The arrow indicates the heat input; the reference line shows scale; symbols above/below indicate color
• C. The arrow points to the material grade; the reference line indicates tolerance; symbols above/below indicate finish
• D. The arrow marks the inspection point; the reference line marks the revision; symbols above/below indicate welding method

Answer: (A)

When reading a welding symbol on a drawing, the arrow marks the exact weld location on the joint, and the reference line runs along the joint to carry the design of the weld. The shape of the symbol and any numbers placed on the line tell you what type of weld to apply and how big it should be. The information above or below the reference line indicates the weld details for the corresponding side of the joint. In this sense, the arrow guides you to where to weld, while the reference line and its attached symbols define what weld to perform and its size. Other options mix up what the symbols encode: heat input, scale, or color aren’t read from these placements; material grade or tolerances belong to other drawing conventions; and inspection points or revisions are shown with different notations.

When reading a welding symbol on a drawing, the arrow marks the exact weld location on the joint, and the reference line runs along the joint to carry the design of the weld. The shape of the symbol and any numbers placed on the line tell you what type of weld to apply and how big it should be. The information above or below the reference line indicates the weld details for the corresponding side of the joint. In this sense, the arrow guides you to where to weld, while the reference line and its attached symbols define what weld to perform and its size.

Other options mix up what the symbols encode: heat input, scale, or color aren’t read from these placements; material grade or tolerances belong to other drawing conventions; and inspection points or revisions are shown with different notations.