The best squat racks are made of 3x3, 11-gauge steel. You can also find high-quality squat racks with 2x3 steel or 12-gauge steel. We don't recommend 14-gauge steel for squat racks, as it's thinner and not as sturdy. Some squat racks made for commercial gyms are made with 9- or 7-gauge steel, but this may be overkill for most home gym owners.