What is the manipulation type for rods that end in numbers 2, 3, 4, 5, 6, 7, and 8?

The manipulation type for rods that end in numbers 2, 3, 4, 5, 6, 7, and 8 is correctly identified as dragging. This type of manipulation involves a consistent and steady movement across a surface, which is essential in welding processes. The dragging motion allows for a more controlled application of heat and fusion, especially in situations where precision is crucial, such as welding thin materials or maintaining bead consistency.

In the context of welding, dragging ensures that the electrode maintains a proper angle and distance from the workpiece, which is vital to achieve optimal penetration and bead appearance. This technique is particularly relevant in the context of the D1.1 code, where the quality and integrity of welds are critical.

Understanding the specific manipulation types and their corresponding numerical identifiers is essential for welders, as it informs the technique they should employ based on the materials and joint configurations they are working with. This knowledge directly impacts the quality of the weld, ensuring compliance with industry standards and safety regulations.