Final answer:
The jacking equipment being used to raise a 2-ton steel column must be capable of supporting at least 2 tons.
Step-by-step explanation:
The jacking equipment being used to raise a 2-ton steel column must be capable of supporting at least 2 tons. This is because the jacking equipment needs to be able to bear the weight of the steel column without collapsing or causing any damage. Therefore, the correct answer is option 2) 2 tons.