Fine and dandy. And the 16" I jpists in my sons addition are spanning 25' without support (really)....but they were sized based on the loads up top of them. For the OP, take a highway bridge girder and slap it across your foundation and no posts needed, use a triple two bye four and definite posts needed.....anything in between ya gotta know top loads, if any, first. RonMy 16" open web joists are spanning 26' without support.
Typical house dead and live loads, excluding the roof. Trusses for that.Fine and dandy. And the 16" I jpists in my sons addition are spanning 25' without support (really)....but they were sized based on the loads up top of them. For the OP, take a highway bridge girder and slap it across your foundation and no posts needed, use a triple two bye four and definite posts needed.....anything in between ya gotta know top loads, if any, first. Ron