Squat racks tend to be useless for anything but squatting. Some are little more than diagonal metal bars lined with tabs to keep the barbell in line wherever you rack it (like the one at my old gym), and have no safety mechanism. Some are a couple of adjustable columns with a 'safety' mechanism to catch the weight if you hit failure. Etc.
Power racks or cages... I'm sure you're familiar with those. Our beloved rectangular metal frames where we punish ourselves with a variety of pain-inducing exercises.