I currently have a living room/dining room seperated from the kitchen by an "L" shaped wall. I'd like to knock out this wall to create a great room, but I'm not sure if the wall is load bearing. The trusses in the ceiling run perpendicular to the wall and their span is 26' from exterior wall to exterior wall. Over the dining room and living room, the ceiling is unsupported for a span of 9' across the width of the house and there is no beam to support this otherwise unsupported load. Based upon this, do you think the wall is load bearing?

If you have trusses running across that full span, the wall is likely not load bearing