Which symbol indicates that the weld is to be made in the field?

The small black flag at the beginning of the arrow shaft is the symbol that indicates the weld is to be made in the field. This symbol is recognized in welding blueprints and drawings as a clear indication that the welder will be performing the work on-site, as opposed to in a controlled shop environment.

When interpreting welding symbols, it is crucial to understand that each symbol conveys specific information about how and where the weld should be made. In this case, the black flag serves as an important marker for field operations, which can present different challenges compared to shop welds, such as accessibility and variable environmental conditions.

Other symbols mentioned represent different aspects of welding instructions but do not specifically denote field work. For instance, the black dot at the beginning of the arrow shaft typically signifies a specific type of weld preparation or seam, while the circle and triangle each serve distinct purposes related to joint design or preparation, but do not indicate that the weld is to be executed in the field. Understanding the meaning of these symbols is essential for welders to accurately follow plans and execute their work as required.