When connecting two 1.25" plates with a "CJP" butt weld, what is the maximum groove weld reinforcement?

The maximum groove weld reinforcement for a complete joint penetration (CJP) butt weld is dictated by the guidelines set forth in the AWS D1.1 Structural Welding Code. Specifically, the code stipulates that the reinforcement of a butt weld should not exceed 3/16 inch. This dimension is important because excessive reinforcement can lead to issues such as stress concentration, which may compromise the integrity of the weld and the overall structural performance.

In the context of welding practice, ensuring that the reinforcement does not surpass this limit helps maintain a balance between strength and ductility, providing a sound connection while avoiding potential weaknesses in the welded joint. The reinforcement can serve to facilitate the distribution of loads across the welded joint, but when it's too high, it may affect the joint's ability to absorb and dissipate strain.

This criteria is essential for maintaining the necessary mechanical properties of the weld and ensuring compliance with safety standards outlined in the AWS D1.1 code.