For joint B-U5a with a root opening of 1/8", what is the groove angle?

The groove angle for a B-U5a joint with a root opening of 1/8" is specified as 45 degrees in the AWS D1.1 Structural Welding Code. The B-U5a joint is a type of butt weld where the edges of the base materials are prepared with a bevel shape, facilitating penetration and proper fusion during the welding process.

In the context of this joint configuration, the 45-degree groove angle is standard for ensuring adequate weld metal to fill the joint and help achieve the necessary strength and structural integrity. A joint with this angle allows for a balance between weld pool control and sufficient access to the root of the weld for penetration.

This particularly applies to a root opening of 1/8", aligning with the code requirements for proper joint preparation and welding technique. Consistency in following these specifications is critical to ensuring compliance with quality and safety standards in structural welding.