On my tape measure there is a little diamond shape at 19⅜ inches, then another diamond shape at about 38⅝ inches. I have done carpentry work and know when you frame a house you use 16 inches on center ...
When you build a wall, the studs should be spaced equidistant from each other. Here's why the standard is 16 inches "on center", and an easy way to mark them. "16 inches on center" means the center of ...