Framing long walls - Lots of 8' sections or should I use longer top plates
A continuous top and bottom plate are preferred, and longer 2x4 or 2x6's are available for this. If you need to breakup the wall, then make two separate walls and nail them together, to the floor, and with a staggered top plate. When possible, you want to end the wall near a corner to give the joint more support. Also try to stagger top plates near corners for additional strength.