What is the part of a joint to be welded where the members align closely called?

The term used to describe the part of a joint to be welded where the members align closely is known as the joint root. This area is crucial because it represents the point where the weld is actually deposited and where the base materials come together. Proper alignment at the joint root is essential for achieving a strong and effective weld, as it facilitates proper fusion between the interfacing surfaces of the materials being joined.

Understanding the significance of the joint root is fundamental in welding practices, as issues like misalignment or inadequate root penetration can lead to weaknesses in the weld. Knowing this terminology is important for effective communication and interpretation of welding prints, as it provides clarity on where the welding process will take place.