Before World War I, pallet rack was not common. When racking finally arrived, it gave warehouses the ability to store pallets vertically, and that single change could double or triple a building's storage capacity. Here is how it happened.
It started with the box
In the early 1900s, companies needed an easier, cheaper way to package products. The answer was corrugated packaging, which rail and road freight authorities widely accepted. The boxes were cheap to produce and easy to pack. The catch was labor: every box had to be moved by hand, and heavier products forced packaging to stay small enough to carry. Something had to make moving product faster.
The forklift changes everything
By 1915 that something existed: the forklift. It quickly became a central piece of how a warehouse functioned. With a forklift, pallets could be moved regardless of weight, which sped up loading and unloading. When forklifts were adapted to lift pallets several feet into the air, they opened the door to a new idea, storing product up instead of out.
The first vertical rack
By the late 1920s the first pallet rack systems appeared, built for vertical storage. Warehouses could finally grow upward instead of expanding their footprint, and that proved far more cost-effective. Over time, systems evolved from holding a single layer of pallets per level to being engineered to carry much more weight when it was distributed correctly. That advance introduced the multilevel pallet racks that define warehouses today.
An industry of its own
Pallet racks proved useful across every industry and grew into an industry in their own right. Every year more items are produced and shipped, which keeps driving demand for more rack. Companies spend heavily on warehousing, and a large share of that goes to pallet rack storage systems, with warehouse space optimization the main engine behind the growth. When a company starts to outrun the capacity of its building, the smart move is not to wait for productivity to slip. It is to use the vertical space already overhead. That is exactly the problem we have helped warehouses solve since 1979.