I am trying to determine the particular I-beam we need to spam 22'-4". I think a 16" high with 2x4's top and bottom would be enough. It will be supporting a pool table. I also would like to know the product code and cost for the beams and a local distributor, we deel with Home Depot primaraly. The loft will be 32' wide by span of 22'-4", can you space them 24" or would we need to go to 16 oc.