Good day!
To answer your questions, the floor boards are parallel to the route I walk and are nailed to joists that are 18 inches apart. If it makes a difference, there is a steel beam that runs down the center of the basement supported by two steel poles. The joists rest on this beam...
I live in a straight ranch with oak flooring in each room (except kitchen). All areas are carpeted. Squeaking occurs in a straight line starting in the kitchen into the dining room, down the hall and into a bedroom at the end of the hall. This is the heavy traffic area in my house. I cannot...