Power rack

A power rack is a steel frame, usually four upright posts, with adjustable J-cups to hold a barbell and safety bars or straps set at a height that catches the bar if a lift fails. This is what lets someone squat or bench heavy without a spotter, which matters in an apartment where training alone is common.

Full-size racks can be too deep or too tall for a small room, so foldable racks that fit flat against a wall when not in use, and wall-mounted racks that fold the arms in, both trade some rigidity and loading capacity for a much smaller stored footprint. Ceiling height also limits whether a pull-up attachment on top is usable.

When buying, check both the set-up and folded footprint, the type of safety catch, whether it needs bolting into studs or concrete, and its rated weight capacity against your actual working loads. A common mistake is choosing a wall-mounted rack in a rental without confirming there is a solid stud or masonry wall in the right spot to anchor it safely.