Abstract: Lumber having stud locator markings spaced along lengths thereof. The marked lumber assists in layout and assembly of a frame wall comprising bottom plate, top plate, and a plurality of studs extending between the bottom and top plates at one or more of a limited number of regularly-spaced pre-determined stud spacings along the plates. Respective pieces of the lumber are useful in the bottom and/or top plates. Stud locator markings define positions for placement, on the respective plate, of stud ends to be mounted against the respective bottom or top plate. Stud locator markings indicate where front and back surfaces of the studs intersect the respective plate. The stud markings are spaced along the bottom and top plates at one or more of the pre-determined stud spacings. Each stud marking comprises marking material affixed directly to the respective piece of lumber. Preferred spacings for stud markings are about 8 inches, optionally 16 or 24 inches.