What is the minimum filler metal tensile strength required for a CJP groove weld column splice on material with a minimum tensile strength of 70 ksi?

The minimum filler metal tensile strength required for a Complete Joint Penetration (CJP) groove weld column splice should match or exceed the minimum tensile strength of the base material being welded. In this case, the base material has a minimum tensile strength of 70 ksi. For adequate strength and to ensure the weld can bear the loads without compromising integrity, the filler metal should be at least equal to the strength of the base material.

Therefore, the correct answer reflects this requirement, as using a filler metal tensile strength of 60 ksi, while an increase over the minimum requirement, does not provide sufficient strength matching the base material specification. The ideal filler metal tensile strength typically needs to be at least equal to or higher than the base material to ensure the overall structural integrity of the weld. Thus, having a filler metal tensile strength of 70 ksi meets the necessary standard for CJP groove welds in this context.