A solid flag in a welding symbol indicates that the weld is to be performed:

A solid flag in a welding symbol specifically indicates that the weld is to be performed in the field. This notation is crucial for ironworkers and welders as it communicates where the welding activities are expected to take place. Typically, field welds are completed on-site where the structure is being erected or installed, as opposed to shop welds, which would be completed in a controlled environment with the materials already prepped and assembled beforehand.

Recognizing this distinction is essential for the workflow and logistics of any construction project. Understanding where the weld is going to be performed allows for better planning, preparation of equipment, and safety considerations specific to the site conditions.