I have a two-story colonial home. I want to remove an interior wall on the first floor under the master bedroom that separates my family room and living room. It runs perpendicular to the roof trusses running from an exterior wall spanning 11' to the wall under the staircase, but parallel to the floor joists above. I spoke to a structural engineer who said if it runs perpendicular to the roof trusses it is usually structural, but others say if it is parallel to the floor joists it isn't. If I presume it is load bearing, what is the proper method to brace during removal and what depth of beam and side supports should I put in? 2-2x4's for the beam? do I need 2 2x4's at both ends or just on one side since the other is an exterior wall? Thanks so much. Want to make sure we do this right.