Can anyone help me get an answer to this problem I have. A wooden 2x12 has a load limit of 237lb per linear foot on an 8 foot span. Can anyone tell me what the what the load limit on 1 1/2 square tubing with 3/16 walls is over the same 8 foot span?

I'm trying to beef up an old structure with steel tubing because wood is not feasible for reasons of looks.