![]() ![]() ![]() The friction produced by squeezing the beam pin into the teardrop slot also strengthens the entire rack assembly. This makes it impossible to slip out without an upward force lifting the beam and deck assembly. As this force bottoms out, the pin’s head is well below the opening diameter at the top of the slot. With the teardrop being similar to a V, the load transfer from the rack’s horizontal beam to the vertical support compresses the beam’s pin into the teardrop slot. It’s also due to the teardrop design being speedy to assemble and disassemble when rack configurations need changing.įrom an engineering point, the teardrop racking design is superior to others in several ways. That’s because the teardrop slot is simple, secure, steady and safe. After decades of experimenting with several different vertical rack slot profiles, the simple teardrop configuration won out. Teardrop pallet racking is the most popular rack design in the world. That’s followed by the less-popular, but still functional, double slot connection design. As a result, today the most popular upright and beam connection point is the teardrop design. This led to uniformity in the bulk storage industry. (RMI) worked to streamline the rack options offered by a multitude of racking manufacturers. Industry-driven cooperative associations like the Rack Manufacturers Institute, Inc. ![]() Rack manufacturers slowly responded to consumer demand. Rather than adding on more verticals, beams and decks, the warehouse businesses had to replace entire systems at significant costs. As pallet racking equipment aged and needed replacement, or as warehouses expanded and required additional racking, consumers became frustrated by the differences between competing rack components. In practice, this led to incompatibility between systems. This supposedly ensured continuous demand and not losing market share to the competition. That way, a warehouse business would have to buy additional racking components from the original manufacturer. The theory was that each racking system maker would hold proprietary patents on their systems through creative slot designs. This led to manufacturing competition and many unique vertical member slot designs showing up on the market. As post-war production for civilian interests expanded, so did the demand for pallet racking components. This made rack uprights, beams and decks incompatible with one another.įollowing the war, the demand for warehousing and efficient racking didn’t slow down. Different companies produced rack systems, leading to non-uniformity in design. This dates back to World War II when massive manufacturing of war goods required pallets and related material handling equipment, including racking and shelving systems. There are clear reasons why selective racking manufacturers offer two main slot designs. Why Are There Different Racking Slot Designs? Teardrops also have parallel perforations in most applications. As their name suggests, double slots have two vertical holes sitting side by side. Double slots, on the other hand, are vertical incisions in the metal members. Teardrop rack connections are pear-shaped. Although there are many slot designs, there are two primary profiles commonly found within warehouses - teardrop pallet racks and double slotted pallet racks.īoth configurations get their name from their connection opening shape. Racking has evolved over the years, and the main difference is in the beam connection slots built into the racking system’s vertical or upright members. They capitalize on space, safely store a multitude of products and make workers’ jobs easy for retrieving materials and merchandise.īut, not all racks have common designs. Racks, as they’re commonly called, are indispensable pieces of material handling equipment. Most American warehouses have at least one thing in common - the need for selective pallet racking. ![]()
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