Typical ranch style home.( one roof line from end to end of home) I want to combine the two back rooms and there is what I think to be a support wall connecting the two. But nothing seems to be resting on the support wall, but assuming since such a length is involved, it is supporting the span. The total span is 24 ft. 12 on both sides. This is one support from one side of house to other. I want to move the wall over about 5 ft. Leaving the longer side about 18 ft. How can I , or what should I do to add support to the 18 ft section. This is a typical prefab trust system. Can I simply sister the 18 ft length and use ties to support that 18 ft length. Can I "V" support the new support wall to the rafters and use hangers on the 18 ft section. Please give me any suggestions.