What is the maximum weld reinforcement for a cyclically loaded structure greater than 2?

In the context of the AWS D1.1 Structural Welding Code, maximum weld reinforcement is crucial for ensuring the structural integrity and fatigue resistance of welds in cyclically loaded structures. For cyclically loaded applications, the code specifies a maximum weld reinforcement of 3/16". This limitation is in place to mitigate the potential for stress concentrations that can lead to fatigue failures.

Weld reinforcement refers to the additional material that forms above the surface of the base metal at the extremities of the weld bead. If this reinforcement exceeds the specified limit, it can create areas of high stress and reduce the overall performance of the welded joint, particularly under fluctuating loads. By adhering to the 3/16" maximum, the design promotes a more favorable distribution of stress within the structure.

In contrast, options providing values above or below this specified maximum do not align with the guidelines set forth in the code related to cyclic loading conditions. Thus, selecting 3/16" as the maximum weld reinforcement ensures compliance with the design criteria aimed at maintaining the structural integrity of cyclically loaded components.