A rolling rack can refer to two different types of storage racks—smaller racks that are equipped with casters and are mobile, or a flow rack system, composed of inclined roller conveyors used for storage. While they share the same name, these racks are very different in both application and construction.
Of the two types of rolling racks, the mobile rolling racks are defined by how they ease the process of transporting heavy objects or large amounts of products without the use of a vehicle or automated conveying system. They are manually pushed by workers, but take very little energy and are able to move anywhere so long as the floor is smooth and solid. These portable racks are used to transport garments, hotel luggage, food and ingredients in food processing facilities and restaurants, among other applications. Roller conveyor racks, on the other hand, are not mobile, but are used to store pallets, boxes and trays full of tools or products. They operate with a first in, first out storage method, and, like push back racks, are inclined so that when the front load is removed, the load next in line is pushed to the forward position. This saves on space and increases picking efficiency.
Both styles of rolling racks are usually composed of multiple shelves that are interlocked or welded to strong steel beams. They are both stable, long lasting and can hold high weights. Because they are so often used in industrial settings, rolling racks are manufactured to be temperature, moisture, oil and chemically resistant. Mobile rolling racks are movable because of casters, which allow for 380º or straight line movement. Each rack contains 2 to 4 casters each, and are composed of solid rubber, plastic or metal, or are considered pneumatic, and are small, hollow rubber tires filled with compressed air. Some are equipped with a braking system to keep the rack in place when needed. These are usually levers that are activated by pushing downward with a foot. They absorb shock to prevent items from bouncing or falling off the rack, but operate best on smooth, hard, even flooring. Rolling conveyor racks are similar to push back racks, which also have shelves positioned at a gentle angle. This angle employs gravity to force the boxes, trays or pallets to automatically move forward, ensuring the lift trucks don't need to travel inside the shelving system which could cause damage. The rollers are made of metal and have a high strength to weigh ratio. These shelving systems are loaded in the rear and picked in the front, which requires an aisle on each side.
