What is the maximum depth of bevel S2 for joint designation B-U3c-S when welding a 3.5" thick plate?

For joint designation B-U3c-S, which refers to a specific configuration of a butt joint in structural welding, the maximum depth of bevel is determined by the thickness of the plate being welded.

When welding a plate that is 3.5 inches thick, the standards for beveling depths dictate that the maximum depth of bevel should not exceed 1/3 of the thickness of the plate. In this case, 1/3 of 3.5 inches is approximately 1.17 inches. The option that most closely aligns with this calculation is 1-1/8 inches, which translates to 1.125 inches. This depth allows for sufficient penetration without compromising the integrity of the joint and aligns with welding codes that specify maximum bevel depths to ensure strong and effective welds.

Therefore, the correct answer reflects adherence to these established welding standards regarding acceptable bevel depths for the specific joint designation in question.