I too have heard of AHJ's asking EC's to bond the lonely piece of steel in a basement but I feel like some here that it is not required and I would never ask anyone to bond that piece of steel. Could it become energized? Well yea, I guess it could, however there is already a grounding conductor run with the cable (BX or RX)and that should be enough. Also the NEC is a mininmum and if you want to bond that I-beam you can do it.
