What equation is used to determine weld strength in shear?

The correct answer is based on the use of the AISC equation 8-1, which specifically addresses the shear strength of welds in structural steel design. This equation incorporates important factors such as the effective length of the weld, the size of the weld, and the material properties of the base metal and the weld material.

In structural applications, welds are often subjected to shear forces, and it is crucial to calculate their strength accurately to ensure the integrity of the connection under load. AISC equation 8-1 provides a standardized method for engineers to determine if a welded joint can safely carry the required shear load without failure.

Other choices relate to different structural codes or contexts, but they do not pertain specifically to the shear strength of welds. ACI equation 10-4 is primarily used for concrete design, ASTM equation 5-3 relates to material specifications, and IBC equation 12-2 focuses on lateral forces in design, making them irrelevant for determining shear strength in weld connections.