Watch Tier-Rack’s demonstration and creation videos to learn about their Stack Racks, and how the Tier-Rack Stack Rack System can help your company! Tier-Rack is a leading manufacturer of portable stack racks. These are sometimes called stackers. Tier-Rack can make custom tire racks, bins, custom racks, storage bins, wire baskets, laced cages, carts, industrial rack, multiple storage systems, rack shelving, custom material handling racks, or warehouse rack. Tier-Rack also sells used racks.