Building Straight Walls
Bob Schmidt shows you some simple tips and techniques for building straight walls while doing basic framing in your home remodel project. The walls are laid out on the floor by looking at the plans to verify the wall locations. Mark the floor at each end of the wall. Measure over the thickness of the wall and mark the other side of the wall. Snap a chalk line between the marks. You now have the walls drawn on the floor. Mark the door openings on the floor, they will be transferred onto the plates later. The top and bottom plates are cut and laid on the wall lines. Every plate should be the exact length of the marks on the floor. For the straightest walls, position every stud with any crown facing upward. The crown is the slight bow in the center and every stud has one, although some are more pronounced than others.
More information can be found at http://www.icreatables.com/home-build/step-12-frame-interior-walls.html