The bases and lower crosspiece are made of 2” x 2” x 3/16” angle iron - this is the stuff that ramps on car carriers and landscape trailers are made of, making this is the ultimate in heavy-duty racks!
The bolts for the crossbar at the top extend through the vertical support and directly into a grade 5 nut welded into the crossbar. The upright bolts together over a long, wide, flat area with 3 bolt points per side. By contrast, less durable carts will bolt together at a single point.
There’s nothing stronger and more durable than the Ultra Heavy Duty Garment Rack.